100mW stereo headphone amplifier with standby mode
Document overview
- Manufacturer or author: STMICROELECTRONICS
- PDF pages: 31
Technical content
■ OPERATING FROM Vcc=2V to 5.5V ■ STANDBY MODE ACTIVE LOW (TS486) or HIGH (TS487) ■ OUTPUT POWER: 102mW @5V, 38mW @3.3V into 16Ω with 0.1% THD+N max (1kHz) ■ LOW CURRENT CONSUMPTION : 2.5mA max ■ High Signal-to-Noise ratio: 103dB(A) at 5V ■ High Crosstalk immunity: 83dB (F=1kHz) ■ PSRR: 58 dB (F=1kHz), inputs grounded ■ ON/OFF click reduction circuitry ■ Unity-Gain Stable ■ SHORT CIRCUIT LIMITATION ■ Available in SO8, MiniSO8 & DFN 3x3mm
DESCRIPTION
The TS486/7 is a dual audio power amplifier capa- ble of driving, in single-ended mode, either a 16 or a 32Ω stereo headset. Capable of descending to low voltages, it delivers up to 90mW per channel (into 16Ω loads) of con- tinuous average power with 0.3% THD+N in the audio bandwitdth from a 5V power supply. An externally-controlled standby mode reduces the supply current to 10nA (typ.). The unity gain stable TS486/7 can be configured by external gain-setting resistors or used in a fixed gain ver- sion.
APPLICATIONS
■ Headphone Amplifier ■ Mobile phone, PDA, computer motherboard ■ High end TV, portable audio player ORDER CODE MiniSO & DFN only available in Tape & Reel with T suffix, SO is available in Tube (D) and in Tape & Reel (DT) PIN CONNECTIONS (top view) Part Number Temperature Range: I Package Gain Marking DS Q TS486 -40, +85°C
- external TS486I TS487 • external TS487I TS486 •• external K86A TS486-1 tba tba x1/0dB K86B TS486-2 tba tba x2/6dB K86C TS486-4 tba tba x4/12dB K86D TS487 •• external K87A TS487-1 tba tba x1/0dB K87B TS487-2 tba tba x2/6dB K87C TS487-4 tba tba x4/12dB K87D TS487IDT: SO8, TS487IST, TS487-1IST, TS487-2IST, TS487-4IST: MiniSO8 TS486-IQT, TS486-1IQT, TS486-2IQT, TS486-4IQT: DFN8 4 5 6BYPASS GND SHUTDOWN Vcc OUT (2) OUT (1) VIN (2) VIN (1) 4 5 6BYPASS GND SHUTDOWN Vcc OUT (2) OUT (1) VIN (2) VIN (1) 4 5 6BYPASS GND SHUTDOWN Vcc OUT (2) OUT (1) VIN (2) VIN (1) 4 5 6BYPASS GND SHUTDOWN Vcc OUT (2) OUT (1) VIN (2) VIN (1) TS487-IQT, TS487-1IQT, TS487-2IQT, TS487-4IQT: DFN8 TS486IDT: SO8, TS486IST, TS486-1IST, TS486-2IST, TS486-4IST: MiniSO8 OUT (1) BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) 8OUT (1) BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) 8OUT (1) BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) OUT (1) BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) OUT (1) BYPASS GND VCC OUT (2) VIN (2) SHUTDOWN VIN (1) TS486 TS487 100mW STEREO HEADPHONE AMPLIFIER WITH STANDBY MODE June 2003 Obsolete Product(s) - Obsolete Product(s)
Symbol Parameter Value Unit VCC Supply voltage 1) 6V Vi Input Voltage -0.3v to VCC +0.3v V Tstg Storage Temperature -65 to +150 °C Tj Maximum Junction Temperature 150 °C R thja Thermal Resistance Junction to Ambient SO8 MiniSO8 DFN8 175 215 °C/W Pd Power Dissipation 2) SO8 MiniSO8 DFN8 0.71 0.58 1.79 W ESD Human Body Model (pin to pin): TS486, TS4873) 1.5 kV ESD Machine Model - 220pF - 240pF (pin to pin) 100 V Latch-up Latch-up Immunity (All pins) 200 mA Lead Temperature (soldering, 10sec) 250 °C Output Short-Circuit to Vcc or GND continous 4) 1. All voltage values are measured with respect to the ground pin. 2. Pd has been calculated with Tamb = 25°C, Tjunction = 150°C. 3. TS487 stands 1.5KV on all pins except standby pin which stands 1KV. 4. Attention must be paid to continous power dissipation (VDD x 300mA). Exposure of the IC to a short circuit for an extended time period is dramatically reducing product life expectancy. Symbol Parameter Value Unit VCC Supply Voltage 2 to 5.5 V R L Load Resistor ≥ 16 Ω Toper Operating Free Air Temperature Range -40 to + 85 °C C L Load Capacitor R L = 16 to 100Ω R L > 100Ω 400 100 pF V STB Standby Voltage Input TS486 ACTIVE / TS487 in STANDBY TS486 in STANDBY / TS487 ACTIVE 1.5 ≤ V STB ≤ VCC GND ≤ VSTB ≤ 0.4 1) V R THJA Thermal Resistance Junction to Ambient SO8 MiniSO8 DFN8 150 190 °C/W 1. The minimum current consumption (ISTANDBY ) is guaranteed at GND (TS486) or VCC (TS487) for the whole temperature range. 2. When mounted on a 4-layer PCB. Obsolete Product(s) - Obsolete Product(s)
FIXED GAIN VERSION SPECIFIC ELECTRICAL CHARACTERISTICS VCC from +5V to +2V, GND = 0V, Tamb = 25°C (unless otherwise specified) APPLICATION COMPONENTS INFORMATION TYPICAL APPLICATION SCHEMATICS Symbol Parameter Min. Typ. Max. Unit R IN 1,2 Input Resistance 1) 1. See figure 30 to establish the value of Cin vs. -3dB cut off frequency. 20 k Ω G Gain value for Gain TS486/TS487-1 Gain value for Gain TS486/TS487-2 Gain value for Gain TS486/TS487-4 0dB 6dB 12dB dB Components Functional Description R IN1,2 Inverting input resistor which sets the closed loop gain in conjunction with RFEED . This resistor also forms a high pass filter with CIN (fc = 1 / (2 x Pi x RIN x CIN)) . Not needed in fixed gain versions. C IN1,2 Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminal. R FEED1,2 Feedback resistor which sets the closed loop gain in conjunction with RIN. AV= Closed Loop Gain= -RFEED /RIN. Not needed in fixed gain versions. C S Supply Bypass capacitor which provides power supply filtering. C B Bypass capacitor which provides half supply filtering. C OUT1,2 Output coupling capacitor which blocks the DC voltage at the load input terminal. This capacitor also forms a high pass filter with RL (fc = 1 / (2 x Pi x RL x COUT )). Obsolete Product(s) - Obsolete Product(s)
ELECTRICAL CHARACTERISTICS
VCC = +5V, GND = 0V, Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit ICC Supply Current No input signal, no load 1.8 2.5 mA ISTANDBY Standby Current No input signal, VSTANDBY =GND for TS486, RL=32Ω No input signal, VSTANDBY =Vcc for TS487, RL=32Ω 10 1000 nA VIO Input Offset Voltage (VICM = VCC /2) 1m V IIB Input Bias Current (VICM = VCC /2) 1) 1. Only for external gain version. 90 200 nA PO Output Power THD+N = 0.1% Max, F = 1kHz, RL = 32Ω THD+N = 1% Max, F = 1kHz, RL = 32Ω THD+N = 0.1% Max, F = 1kHz, RL = 16Ω THD+N = 1% Max, F = 1kHz, RL = 16Ω 102 108 mW THD + N Total Harmonic Distortion + Noise (A v=-1) R L = 32Ω, Pout = 60mW, 20Hz ≤ F ≤ 20kHz R L = 16Ω, Pout = 90mW, 20Hz ≤ F ≤ 20kHz 0.3 0.3 PSRR Power Supply Rejection Ratio, inputs grounded 2) (Av=-1), RL>=16Ω , CB=1µF, F = 1kHz, Vripple = 200mVpp 2. Guaranteed by design and evaluation. 53 58 dB IO Max Output Current THD +N ≤ 1%, RL = 16Ω connected between out and VCC /2 106 115 mA VO Output Swing VOL : RL = 32Ω VOH : RL = 32Ω VOL : RL = 16Ω VOH : RL = 16Ω 4.45 4.2 0.45 4.52 0.6 4.35 0.5 0.7 V SNR Signal-to-Noise Ratio (A weighted, Av=-1) 2) (RL = 32Ω, THD +N < 0.4%, 20Hz ≤ F ≤ 20kHz) 80 103 dB Crosstalk Channel Separation, RL = 32Ω, Av=-1 F = 1kHz F = 20Hz to 20kHz Channel Separation, RL = 16Ω, Av=-1 F = 1kHz F = 20Hz to 20kHz dB C I Input Capacitance 1 pF GBP Gain Bandwidth Product (RL = 32Ω) 1.1 MHz SR Slew Rate, Unity Gain Inverting (RL = 16Ω) 0.4 V/µs Obsolete Product(s) - Obsolete Product(s)
VCC = +3.3V, GND = 0V, Tamb = 25°C (unless otherwise specified) 1) 1. All electrical values are guaranted with correlation measurements at 2V and 5V. Symbol Parameter Min. Typ. Max. Unit ICC Supply Current No input signal, no load 1.8 2.5 mA ISTANDBY Standby Current No input signal, VSTANDBY =GND for TS486, RL=32Ω No input signal, VSTANDBY =Vcc for TS487, RL=32Ω 10 1000 nA VIO Input Offset Voltage (VICM = VCC /2) 1m V IIB Input Bias Current (VICM = VCC /2) 2) 2. Only for external gain version. 90 200 nA PO Output Power THD+N = 0.1% Max, F = 1kHz, RL = 32Ω THD+N = 1% Max, F = 1kHz, RL = 32Ω THD+N = 0.1% Max, F = 1kHz, RL = 16Ω THD+N = 1% Max, F = 1kHz, RL = 16Ω mW THD + N Total Harmonic Distortion + Noise (Av=-1) R L = 32Ω, Pout = 16mW, 20Hz ≤ F ≤ 20kHz R L = 16Ω, Pout = 35mW, 20Hz ≤ F ≤ 20kHz 0.3 0.3 PSRR Power Supply Rejection Ratio, inputs grounded 3) (Av=-1), RL>=16Ω , CB=1µF, F = 1kHz, Vripple = 200mVpp 3. Guaranteed by design and evaluation. 53 58 dB IO Max Output Current THD +N ≤ 1%, RL = 16Ω connected between out and VCC /2 64 75 mA VO Output Swing VOL : RL = 32Ω VOH : RL = 32Ω VOL : RL = 16Ω VOH : RL = 16Ω 2.85 2.68 0.3 0.45 2.85 0.38 0.52 V SNR Signal-to-Noise Ratio (A weighted, Av=-1) 3) (RL = 32Ω, THD +N < 0.4%, 20Hz ≤ F ≤ 20kHz) 80 98 dB Crosstalk Channel Separation, RL = 32Ω, Av=-1 F = 1kHz F = 20Hz to 20kHz Channel Separation, RL = 16Ω, Av=-1 F = 1kHz F = 20Hz to 20kHz dB C I Input Capacitance 1 pF GBP Gain Bandwidth Product (RL = 32Ω) 1.1 MHz SR Slew Rate, Unity Gain Inverting (RL = 16Ω) 0.4 V/µs Obsolete Product(s) - Obsolete Product(s)
VCC = +2.5V, GND = 0V, Tamb = 25°C (unless otherwise specified)1) 1. All electrical values are guaranted with correlation measurements at 2V and 5V. Symbol Parameter Min. Typ. Max. Unit ICC Supply Current No input signal, no load 1.7 2.5 mA ISTANDBY Standby Current No input signal, VSTANDBY =GND for TS486, RL=32Ω No input signal, VSTANDBY =Vcc for TS487, RL=32Ω 10 1000 nA VIO Input Offset Voltage (VICM = VCC /2) 1m V IIB Input Bias Current (VICM = VCC /2) 2) 2. Only for external gain version. 90 200 nA PO Output Power THD+N = 0.1% Max, F = 1kHz, RL = 32Ω THD+N = 1% Max, F = 1kHz, RL = 32Ω THD+N = 0.1% Max, F = 1kHz, RL = 16Ω THD+N = 1% Max, F = 1kHz, RL = 16Ω 12.5 17.5 mW THD + N Total Harmonic Distortion + Noise (A v=-1) R L = 32Ω, Pout = 10mW, 20Hz ≤ F ≤ 20kHz R L = 16Ω, Pout = 16mW, 20Hz ≤ F ≤ 20kHz 0.3 0.3 PSRR Power Supply Rejection Ratio, inputs grounded 3) (Av=-1), RL>=16Ω , CB=1µF, F = 1kHz, Vripple = 200mVpp 3. Guaranteed by design and evaluation. 53 58 dB IO Max Output Current THD +N ≤ 1%, RL = 16Ω connected between out and VCC /2 45 56 mA VO Output Swing VOL : RL = 32Ω VOH : RL = 32Ω VOL : RL = 16Ω VOH : RL = 16Ω 2.14 1.97 0.25 2.25 0.35 2.15 0.32 0.45 V SNR Signal-to-Noise Ratio (A weighted, A v=-1) 3) (RL = 32Ω, THD +N < 0.4%, 20Hz ≤ F ≤ 20kHz) 80 95 dB Crosstalk Channel Separation, RL = 32Ω, Av=-1 F = 1kHz F = 20Hz to 20kHz Channel Separation, RL = 16Ω, Av=-1 F = 1kHz F = 20Hz to 20kHz dB C I Input Capacitance 1 pF GBP Gain Bandwidth Product (RL = 32Ω) 1.1 MHz SR Slew Rate, Unity Gain Inverting (RL = 16Ω) 0.4 V/µs Obsolete Product(s) - Obsolete Product(s)
VCC = +2V, GND = 0V, Tamb = 25°C (unless otherwise specified) Symbol Parameter Min. Typ. Max. Unit ICC Supply Current No input signal, no load 1.7 2.5 mA ISTANDBY Standby Current No input signal, VSTANDBY =GND for TS486, RL=32Ω No input signal, VSTANDBY =Vcc for TS487, RL=32Ω 10 1000 nA VIO Input Offset Voltage (VICM = VCC /2) 1m V IIB Input Bias Current (VICM = VCC /2) 1) 1. Only for external gain version. 90 200 nA PO Output Power THD+N = 0.1% Max, F = 1kHz, RL = 32Ω THD+N = 1% Max, F = 1kHz, RL = 32Ω THD+N = 0.3% Max, F = 1kHz, RL = 16Ω THD+N = 1% Max, F = 1kHz, RL = 16Ω 9.5 mW THD + N Total Harmonic Distortion + Noise (Av=-1) R L = 32Ω, Pout = 6.5mW, 20Hz ≤ F ≤ 20kHz R L = 16Ω, Pout = 8mW, 20Hz ≤ F ≤ 20kHz 0.3 0.3 PSRR Power Supply Rejection Ratio, inputs grounded 2) (Av=-1), RL>=16Ω , CB=1µF, F = 1kHz, Vripple = 200mVpp 2. Guaranteed by design and evaluation. 52 57 dB IO Max Output Current THD +N ≤ 1%, RL = 16Ω connected between out and VCC /2 33 41 mA VO Output Swing VOL : RL = 32Ω VOH : RL = 32Ω VOL : RL = 16Ω VOH : RL = 16Ω 1.67 1.53 0.24 1.73 0.33 1.63 0.29 0.41 V SNR Signal-to-Noise Ratio (A weighted, A v=-1) 2) (RL = 32Ω, THD +N < 0.4%, 20Hz ≤ F ≤ 20kHz) 80 93 dB Crosstalk Channel Separation, RL = 32Ω, Av=-1 F = 1kHz F = 20Hz to 20kHz Channel Separation, R L = 16Ω, Av=-1 F = 1kHz F = 20Hz to 20kHz dB C I Input Capacitance 1 pF GBP Gain Bandwidth Product (RL = 32Ω) 1.1 MHz SR Slew Rate, Unity Gain Inverting (RL = 16Ω) 0.4 V/µs Obsolete Product(s) - Obsolete Product(s)
Open Loop Gain and Phase vs Frequency 1 to 10 9 to 10 Current Consumption vs Power Supply Voltage 11 10 Current Consumption vs Standby Voltage 12 to 17 10 to 11 Output Power vs Power Supply Voltage 18 to19 11 to 12 Output Power vs Load Resistor 20 to 23 12 Power Dissipation vs Output Power 24 to 27 12 to 13 Power Derating vs Ambiant Temperature 28 13 Output Voltage Swing vs Supply Voltage 29 13 Low Frequency Cut Off vs Input Capacitor for fixed gain versions 30 13 Curves With 0dB Gain Setting (Av=-1) THD + N vs Output Power 31 to 39 14 to 15 THD + N vs Frequency 40 to 42 15 Crosstalk vs Frequency 43 to 48 16 Signal to Noise Ratio vs Power Supply Voltage 49 to 50 17 PSRR vs Frequency 51 to 56 17 to 18 Curves With 6dB Gain Setting (Av=-2) THD + N vs Output Power 57 to 65 19 to 20 THD + N vs Frequency 66 to 68 20 Crosstalk vs Frequency 69 to 72 21 Signal to Noise Ratio vs Power Supply Voltage 73 to 74 21 PSRR vs Frequency 75 to 79 22 Curves With 12dB Gain Setting (Av=-4) THD + N vs Output Power 80 to 88 22 to 24 THD + N vs Frequency 89 to 91 24 Crosstalk vs Frequency 92 to 95 24 Signal to Noise Ratio vs Power Supply Voltage 96 to 97 25 PSRR vs Frequency 98 to 102 26 Obsolete Product(s) - Obsolete Product(s)
Fig. 1: Open Loop Gain and Phase vs Frequency Fig. 3: Open Loop Gain and Phase vs Frequency Fig. 5: Open Loop Gain and Phase vs Frequency Fig. 2: Open Loop Gain and Phase vs Frequency Fig. 4: Open Loop Gain and Phase vs Frequency Fig. 6: Open Loop Gain and Phase vs Frequency 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 5V ZL = 16Ω Tamb = 25°C Gain Phase Phase (Deg) 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 2V ZL = 16Ω Tamb = 25°C Gain Phase Phase (Deg) 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 5V ZL = 32Ω Tamb = 25°CGain Phase Phase (Deg) 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 5V ZL = 16Ω +400pF Tamb = 25°C Gain Phase Phase (Deg) 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 2V ZL = 16Ω +400pF Tamb = 25°C Gain Phase Phase (Deg) 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 5V ZL = 32Ω +400pF Tamb = 25°CGain Phase Phase (Deg) Obsolete Product(s) - Obsolete Product(s)
Fig. 7: Open Loop Gain and Phase vs Frequency Fig. 9: Open Loop Gain and Phase vs Frequency Fig. 11: Current Consumption vs Power Supply Voltage Fig. 8: Open Loop Gain and Phase vs Frequency Fig. 10: Open Loop Gain and Phase vs Frequency Fig. 12: Current Consumption vs Standby Voltage 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 2V ZL = 32Ω Tamb = 25°CGain Phase Phase (Deg) 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 5V RL = 600Ω Tamb = 25°C Gain Phase Phase (Deg) 012345 0.0 0.5 1.0 1.5 2.0 Ta=85°C Ta=25°C No load Ta=-40°C Current Consumption (mA) Power Supply Voltage (V) 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 2V ZL = 32Ω +400pF Tamb = 25°CGain Phase Phase (Deg) 0.1 1 10 100 1000 10000 -40 -20 -20 100 120 140 160 180 Gain (dB) Frequency (kHz) Vcc = 2V RL = 600Ω Tamb = 25°C Gain Phase Phase (Deg) 012345 0.0 0.5 1.0 1.5 2.0 Ta=85°C Ta=25°C TS486 Vcc = 5V No load Ta=-40°C Current Consumption (mA) Standby Voltage (V) Obsolete Product(s) - Obsolete Product(s)
Fig. 13: Current Consumption vs Standby Voltage Fig. 15: Current Consumption vs Standby Voltage Fig. 17: Current Consumption vs Standby Voltage Fig. 14: Current Consumption vs Standby Voltage Fig. 16: Current Consumption vs Standby Voltage Fig. 18: Output Power vs Power Supply Voltage 0123 0.0 0.5 1.0 1.5 2.0 Ta=85°C Ta=25°C TS486 Vcc = 3.3V No load Ta=-40°C Current Consumption (mA) Standby Voltage (V) 012345 0.0 0.5 1.0 1.5 2.0 2.5 Ta=85°C Ta=25°C TS487 Vcc = 5V No load Ta=-40°C Current Consumption (mA) Standby Voltage (V) 012 0.0 0.5 1.0 1.5 2.0 Ta=85°C Ta=25°C TS487 Vcc = 2V No load Ta=-40°C Current Consumption (mA) Standby Voltage (V) 012 0.0 0.5 1.0 1.5 2.0 Ta=85°C Ta=25°C TS486 Vcc = 2V No load Ta=-40°C Current Consumption (mA) Standby Voltage (V) 0123 0.0 0.5 1.0 1.5 2.0 Ta=85°C Ta=25°C TS487 Vcc = 3.3V No load Ta=-40°C Current Consumption (mA) Standby Voltage (V) 100 125 150 175 200 THD+N=10% THD+N=0.1% RL = 16Ω F = 1kHz BW < 125kHz Tamb = 25°C THD+N=1% Output power (mW) Vcc (V) Obsolete Product(s) - Obsolete Product(s)
Fig. 19: Output Power vs Power Supply Voltage Fig. 21: Output Power vs Load Resistor Fig. 23: Output Power vs Load Resistor Fig. 20: Output Power vs Load Resistor Fig. 22: Output Power vs Load Resistor Fig. 24: Power Dissipation vs Output Power 100 THD+N=10% THD+N=0.1% RL = 32Ω F = 1kHz BW < 125kHz Tamb = 25°C THD+N=1% Output power (mW) Vcc (V) 8 1 62 43 24 04 85 66 4 THD+N=10% THD+N=0.1% Vcc = 3.3V F = 1kHz BW < 125kHz Tamb = 25°C THD+N=1% Output power (mW) Load Resistance () 8 1 62 43 24 04 85 66 4 THD+N=10% THD+N=0.1% Vcc = 2V F = 1kHz BW < 125kHz Tamb = 25°CTHD+N=1% Output power (mW) Load Resistance () 8 1 62 43 24 04 85 66 4 100 120 140 160 180 200 THD+N=10% THD+N=0.1% Vcc = 5V F = 1kHz BW < 125kHz Tamb = 25°C THD+N=1% Output power (mW) Load Resistance () 8 1 62 43 24 04 85 66 4 THD+N=10% THD+N=0.1% Vcc = 2.5V F = 1kHz BW < 125kHz Tamb = 25°CTHD+N=1% Output power (mW) Load Resistance () 0 2 04 06 08 0 1 0 0 Vcc=5V F=1kHz THD+N<1% RL=32 Ω RL=16 Ω Power Dissipation (mW) Output Power (mW) Obsolete Product(s) - Obsolete Product(s)
Fig. 25: Power Dissipation vs Output Power Fig. 27: Power Dissipation vs Output Power Fig. 29: Output Voltage Swing vs Power Supply Voltage Fig. 26: Power Dissipation vs Output Power Fig. 28: Power Derating vs Ambiant Temperature Fig. 30: Low Frequency Cut Off vs Input Capacitor for fixed gain versions. 0 1 02 03 04 0 Vcc=3.3V F=1kHz THD+N<1% RL=16 Ω RL=32 Ω Power Dissipation (mW) Output Power (mW) 02468 1 0 1 2 RL=16 Ω RL=32 Ω Vcc=2V F=1kHz THD+N<1% Power Dissipation (mW) Output Power (mW) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 RL=32 Ω RL=16 Ω Tamb=25 °C VOH & VOL (V) Power Supply Voltage (V) 0 5 10 15 20 Vcc=2.5V F=1kHz THD+N<1% RL=16 Ω RL=32 Ω Power Dissipation (mW) Output Power (mW) Ω Ω Ω Obsolete Product(s) - Obsolete Product(s)
Fig. 31: THD + N vs Output Power Fig. 33: THD + N vs Output Power Fig. 35: THD + N vs Output Power Fig. 32: THD + N vs Output Power Fig. 34: THD + N vs Output Power Fig. 36: THD + N vs Output Power 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 20Hz Av = -1 Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Power (mW) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 20Hz Av = -1, Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Voltage (Vrms) 1 10 100 1E-3 0.01 0.1 Vcc=5VVcc=3.3VVcc=2.5V Vcc=2V RL = 32Ω F = 1kHz Av = -1 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 32Ω F = 20Hz Av = -1 Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Power (mW) 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 1kHz Av = -1 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 1kHz Av = -1, Cb = 1µF BW < 125kHz, Tamb = 25°C THD + N (%) Output Voltage (Vrms) Obsolete Product(s) - Obsolete Product(s)
Fig. 37: THD + N vs Output Power Fig. 39: THD + N vs Output Power Fig. 41: THD + N vs Frequency Fig. 38: THD + N vs Output Power Fig. 40: THD + N vs Frequency Fig. 42: THD + N vs Frequency 1 10 100 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 20kHz Av = -1 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 20kHz Av = -1, Cb = 1µF BW < 125kHz, Tamb = 25°C THD + N (%) Output Voltage (Vrms) 100 1000 10000 0.01 0.1 Vcc=2V, Po=6mW Vcc=5V, Po=55mW RL=32 Ω Av=-1 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 THD + N (%) Frequency (Hz) 1 10 100 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 32Ω F = 20kHz Av = -1 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 100 1000 10000 0.01 0.1 Vcc=2V, Po=7.5mW Vcc=5V, Po=85mW RL=16 Ω Av=-1 Cb = 1µF Bw < 125kHz Tamb = 25°C 20k20 THD + N (%) Frequency (Hz) 100 1000 10000 1E-3 0.01 0.1 Vcc=5V, Vo=1.3Vrms Vcc=2V, Vo=0.5Vrms RL=600 Ω Av=-1 Cb = 1µF Bw < 125kHz Tamb = 25°C 20k20 THD + N (%) Frequency (Hz) Obsolete Product(s) - Obsolete Product(s)
Fig. 43: Crosstalk vs Frequency Fig. 45: Crosstalk vs Frequency Fig. 47: Crosstalk vs Frequency Fig. 44: Crosstalk vs Frequency Fig. 46: Crosstalk vs Frequency Fig. 48: Crosstalk vs Frequency 100 1000 10000 ChB to ChA ChA to ChB RL=16 Ω Vcc=5V Pout=85mW Av=-1 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 1000 10000 ChB to ChA ChA to ChB RL=32 Ω Vcc=5V Pout=55mW Av=-1 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 1000 10000 Cb = 4.7µF Cb = 1µF RL=16 Ω Vcc=5V Pout=85mW Av=-1 ChB to ChA Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 1000 10000 ChB to ChA ChA to ChB RL=16 Ω Vcc=2V Pout=7.5mW Av=-1 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 1000 10000 ChB to ChA ChA to ChB RL=32 Ω Vcc=2V Pout=6mW Av=-1 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 1000 10000 Cb = 4.7µF Cb = 1µF RL=32 Ω Vcc=5V Pout=55mW Av=-1 ChB to ChA Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) Obsolete Product(s) - Obsolete Product(s)
Fig. 49: Signal to Noise Ratio vs Power Supply Voltage with Unweighted Filter (20Hz to 20kHz) Fig. 51: PSRR vs Power Supply Voltage Fig. 53: PSRR vs Input Capacitor Fig. 50: Signal to Noise Ratio vs Power Supply Voltage with Weighted Filter Type A Fig. 52: PSRR vs Bypass Capacitor Fig. 54: PSRR vs Output Capacitor 100 102 104 Av = -1 Cb = 1µF THD+N < 0.4% Tamb = 25°C RL=32 Ω RL=16 Ω RL=600 Ω Signal to Noise Ratio (dB) Power Supply Voltage (V) 100 1000 10000 100000 -80 -70 -60 -50 -40 -30 -20 -10 Vcc = 2V Vcc = 5V, 3.3V & 2.5V Vripple = 200mVpp Av = -1 Input = grounded Cb = 1µF RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -70 -60 -50 -40 -30 -20 -10 Cin = 100nF Cin = 1µF, 220nF Vripple = 200mVpp Av = -1, Vcc = 5V Input = grounded Cb = 1µF, Rin = 20kΩ RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 102 104 Av = -1 Cb = 1µF THD+N < 0.4% Tamb = 25°C RL=32 Ω RL=16 Ω RL=600 Ω Signal to Noise Ratio (dB) Power Supply Voltage (V) 100 1000 10000 100000 -80 -70 -60 -50 -40 -30 -20 -10 Cb = 4.7µF Cb = 2.2µF Cb = 1µF Vripple = 200mVpp Av = -1 Input = grounded Vcc = 5V RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -80 -70 -60 -50 -40 -30 -20 -10 Cout = 220µF Cout = 470µF Vripple = 200mVpp Av = -1, Vcc = 5V Input = grounded Cb = 1µF, RL = 16Ω RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) Obsolete Product(s) - Obsolete Product(s)
Fig. 55: PSRR vs Output Capacitor Fig. 56: PSRR vs Power Supply Voltage 100 1000 10000 100000 -80 -70 -60 -50 -40 -30 -20 -10 Cout = 100µF Cout = 470µF Vripple = 200mVpp Av = -1, Vcc = 5V Input = grounded Cb = 1µF, RL = 32Ω RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -80 -70 -60 -50 -40 -30 -20 -10 Vcc = 2V Vcc = 5V, 3.3V & 2.5V Vripple = 200mVpp Av = -1 Input = floating Cb = 1µF RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) Obsolete Product(s) - Obsolete Product(s)
Fig. 57: THD + N vs Output Power Fig. 59: THD + N vs Output Power Fig. 61: THD + N vs Output Power Fig. 58: THD + N vs Output Power Fig. 60: THD + N vs Output Power Fig. 62: THD + N vs Output Power 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 20Hz Av = -2 Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Power (mW) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 20Hz Av = -2, Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Voltage (Vrms) 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 32Ω F = 1kHz Av = -2 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 32Ω F = 20Hz Av = -2 Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Power (mW) 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 1kHz Av = -2 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 1kHz Av = -2, Cb = 1µF BW < 125kHz, Tamb = 25°C THD + N (%) Output Voltage (Vrms) Obsolete Product(s) - Obsolete Product(s)
Fig. 63: THD + N vs Output Power Fig. 65: THD + N vs Output Power Fig. 67: THD + N vs Frequency Fig. 64: THD + N vs Output Power Fig. 66: THD + N vs Frequency Fig. 68: THD + N vs Frequency 1 10 100 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 20kHz Av = -2 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 20kHz Av = -2, Cb = 1µF BW < 125kHz, Tamb = 25°C THD + N (%) Output Voltage (Vrms) 100 1000 10000 0.01 0.1 Vcc=2V, Po=6mW Vcc=5V, Po=55mW RL=32 Ω Av=-2 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 THD + N (%) Frequency (Hz) 1 10 100 0.1 Vcc=5VVcc=3.3VVcc=2.5V Vcc=2V RL = 32Ω F = 20kHz Av = -2 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 100 1000 10000 0.01 0.1 Vcc=2V, Po=7.5mW Vcc=5V, Po=85mW RL=16 Ω Av=-2 Cb = 1µF Bw < 125kHz Tamb = 25°C 20k20 THD + N (%) Frequency (Hz) 100 1000 10000 1E-3 0.01 0.1 Vcc=5V, Vo=1.3Vrms Vcc=2V, Vo=0.5Vrms RL=600 Ω Av=-2 Cb = 1µF Bw < 125kHz Tamb = 25°C 20k20 THD + N (%) Frequency (Hz) Obsolete Product(s) - Obsolete Product(s)
Fig. 69: Crosstalk vs Frequency Fig. 71: Crosstalk vs Frequency Fig. 73: Signal to Noise Ratio vs Power Supply Voltage with Unweighted Filter (20Hz to 20kHz) Fig. 70: Crosstalk vs Frequency Fig. 72: Crosstalk vs Frequency Fig. 74: Signal to Noise Ratio vs Power Supply Voltage with Weighted Filter Type A 100 1000 10000 ChB to ChA ChA to ChB RL=16 Ω Vcc=5V Pout=85mW Av=-2 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 1000 10000 ChB to ChA ChA to ChB RL=32 Ω Vcc=5V Pout=55mW Av=-2 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 Av = -2 Cb = 1µF THD+N < 0.4% Tamb = 25°C RL=32 Ω RL=16 Ω RL=600 Ω Signal to Noise Ratio (dB) Power Supply Voltage (V) 100 1000 10000 ChB to ChA ChA to ChB RL=16 Ω Vcc=2V Pout=7.5mW Av=-2 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 1000 10000 ChB to ChA ChA to ChB RL=32 Ω Vcc=2V Pout=6mW Av=-2 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 102 104 Av = -2 Cb = 1µF THD+N < 0.4% Tamb = 25°C RL=32 Ω RL=16 Ω RL=600 Ω Signal to Noise Ratio (dB) Power Supply Voltage (V) Obsolete Product(s) - Obsolete Product(s)
Fig. 75: PSRR vs Power Supply Voltage Fig. 77: PSRR vs Input Capacitor Fig. 79: PSRR vs Output Capacitor Fig. 76: PSRR vs Bypass Capacitor Fig. 78: PSRR vs Output Capacitor Fig. 80: THD + N vs Output Power 100 1000 10000 100000 -70 -60 -50 -40 -30 -20 -10 Vcc = 2V Vcc = 5V, 3.3V & 2.5V Vripple = 200mVpp Av = -2 Input = grounded Cb = 1µF RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -70 -60 -50 -40 -30 -20 -10 Cin = 100nF Cin = 1µF, 220nF Vripple = 200mVpp Av = -2, Vcc = 5V Input = grounded Cb = 1µF, Rin = 20kΩ RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -70 -60 -50 -40 -30 -20 -10 Cout = 100µF Cout = 470µF Vripple = 200mVpp Av = -2, Vcc = 5V Input = grounded Cb = 1µF, RL = 32Ω RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -70 -60 -50 -40 -30 -20 -10 Cb = 4.7µF Cb = 2.2µF Cb = 1µF Vripple = 200mVpp Av = -2 Input = grounded Vcc = 5V RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -70 -60 -50 -40 -30 -20 -10 Cout = 220µF Cout = 470µF Vripple = 200mVpp Av = -2, Vcc = 5V Input = grounded Cb = 1µF, RL = 16Ω RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 20Hz Av = -4 Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Power (mW) Obsolete Product(s) - Obsolete Product(s)
Fig. 81: THD + N vs Output Power Fig. 83: THD + N vs Output Power Fig. 85: THD + N vs Output Power Fig. 82: THD + N vs Output Power Fig. 84: THD + N vs Output Power Fig. 86: THD + N vs Output Power 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 32Ω F = 20Hz Av = -4 Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Power (mW) 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 1kHz Av = -4 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 1kHz Av = -4, Cb = 1µF BW < 125kHz, Tamb = 25°C THD + N (%) Output Voltage (Vrms) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 20Hz Av = -4, Cb = 1µF BW < 22kHz Tamb = 25°C THD + N (%) Output Voltage (Vrms) 1 10 100 0.01 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 32Ω F = 1kHz Av = -4 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 1 10 100 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 16Ω F = 20kHz Av = -4 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) Obsolete Product(s) - Obsolete Product(s)
Fig. 87: THD + N vs Output Power Fig. 89: THD + N vs Frequency Fig. 91: THD + N vs Frequency Fig. 88: THD + N vs Output Power Fig. 90: THD + N vs Frequency Fig. 92: Crosstalk vs Frequency 1 10 100 0.1 Vcc=5VVcc=3.3V Vcc=2.5V Vcc=2V RL = 32Ω F = 20kHz Av = -4 Cb = 1µF BW < 125kHz Tamb = 25°C THD + N (%) Output Power (mW) 100 1000 10000 0.1 Vcc=2V, Po=7.5mW Vcc=5V, Po=85mW RL=16 Ω Av=-4 Cb = 1µF Bw < 125kHz Tamb = 25°C 20k20 THD + N (%) Frequency (Hz) 100 1000 10000 1E-3 0.01 0.1 Vcc=5V, Vo=1.3Vrms Vcc=2V, Vo=0.5Vrms RL=600 Ω Av=-4 Cb = 1µF Bw < 125kHz Tamb = 25°C 20k20 THD + N (%) Frequency (Hz) 0.01 0.1 1 1E-3 0.01 0.1 Vcc=5V Vcc=3.3V Vcc=2.5V Vcc=2V RL = 600Ω , F = 20kHz Av = -4, Cb = 1µF BW < 125kHz, Tamb = 25°C THD + N (%) Output Voltage (Vrms) 100 1000 10000 0.01 0.1 Vcc=2V, Po=6mW Vcc=5V, Po=55mW RL=32 Ω Av=-4 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 THD + N (%) Frequency (Hz) 100 1000 10000 ChB to ChA ChA to ChB RL=16 Ω Vcc=5V Pout=85mW Av=-4 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) Obsolete Product(s) - Obsolete Product(s)
Fig. 93: Crosstalk vs Frequency Fig. 95: Crosstalk vs Frequency Fig. 97: Signal to Noise Ratio vs Power Supply Voltage with Weighted Filter Type A Fig. 94: Crosstalk vs Frequency Fig. 96: Signal to Noise Ratio vs Power Supply Voltage with Unweighted Filter (20Hz to 20kHz) Fig. 98: PSRR vs Power Supply Voltage 100 1000 10000 ChB to ChA ChA to ChB RL=16 Ω Vcc=2V Pout=7.5mW Av=-4 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 1000 10000 ChB to ChA ChA to ChB RL=32 Ω Vcc=2V Pout=6mW Av=-4 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 Av = -4 Cb = 1µF THD+N < 0.4% Tamb = 25°C RL=32 Ω RL=16 Ω RL=600 Ω Signal to Noise Ratio (dB) Power Supply Voltage (V) 100 1000 10000 ChB to ChA ChA to ChB RL=32 Ω Vcc=5V Pout=55mW Av=-4 Cb = 1µF Bw < 125kHz Tamb=25 °C 20k20 Crosstalk (dB) Frequency (Hz) 100 Av = -4 Cb = 1µF THD+N < 0.4% Tamb = 25°C RL=32 Ω RL=16 Ω RL=600 Ω Signal to Noise Ratio (dB) Power Supply Voltage (V) 100 1000 10000 100000 -60 -50 -40 -30 -20 -10 Vcc = 2V Vcc = 5V, 3.3V & 2.5V Vripple = 200mVpp Av = -4 Input = grounded Cb = 1µF RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) Obsolete Product(s) - Obsolete Product(s)
Fig. 99: PSRR vs Input Capacitor Fig. 101: PSRR vs Output Capacitor Fig. 100: PSRR vs Bypass Capacitor Fig. 102: PSRR vs Output Capacitor 100 1000 10000 100000 -60 -50 -40 -30 -20 -10 Cin = 100nF Cin = 1µF, 220nF Vripple = 200mVpp Av = -4, Vcc = 5V Input = grounded Cb = 1µF, Rin = 20kΩ RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -60 -50 -40 -30 -20 -10 Cout = 220µF Cout = 470µF Vripple = 200mVpp Av = -4, Vcc = 5V Input = grounded Cb = 1µF, RL = 16Ω RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -60 -50 -40 -30 -20 -10 Cb = 4.7µF Cb = 2.2µF Cb = 1µF Vripple = 200mVpp Av = -4 Input = grounded Vcc = 5V RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) 100 1000 10000 100000 -60 -50 -40 -30 -20 -10 Cout = 100µF Cout = 470µF Vripple = 200mVpp Av = -4, Vcc = 5V Input = grounded Cb = 1µF, RL = 32Ω RL >= 16Ω Tamb = 25°C PSRR (dB) Frequency (Hz) Obsolete Product(s) - Obsolete Product(s)
APPLICATION NOTE: TS486/487 GENERAL DESCRIPTION TS486/487 is a family of dual audio amplifiers able to drive 16Ω or 32Ω headsets. Working in the 2V to 5.5V supply voltage range, they deliver 100mW at 5V and 12mW at 2V in a 16 Ω load. An internal output current limitation, offers protection against short-circuits at the output over a limited time period. Fixed gain versions of the TS486 and TS487 including the feedback resistor and the input resistors are also proposed to reduce the number of external parts. The TS486 and TS487 exhibit a low quiescent current of typically 1.8mA, allowing usage in portable applications. The standby mode is selected using the SHUTDOWN input. For TS486 (respectively TS487), the device is in sleep mode when PIN 5 is connected at GND (resp. V CC ). GAIN SETTING The gain of each inverter amplifier of the TS486 and TS487 is set by the resistors RIN and RFEED . GainLINEAR = -(RFEED /RIN) GaindB = 20 Log(RFEED /RIN) Fixed gain versions TS486-n and TS487-n including RIN and RFEED are proposed to reduce external parts. LOW FREQUENCY ROLL-OFF WITH INPUT CAPACITORS The low roll-off frequency of the headphone amplifiers depends on the input capacitors CIN1 and CIN2 and the input resistors RIN1 and RIN2. The CIN capacitor in series with the input resistor R IN of the amplifier is equivalent to a first order high pass filter. Assuming that Fmin is the lowest frequency to be amplified (with a 3dB attenuation), the minimum value of C IN is: C IN > 1 / (2*π*Fmin*RIN ) The following curve gives directly the low frequency roll-off versus the input capacitor CIN Obsolete Product(s) - Obsolete Product(s)
and for various values of the input resistor RIN . The input resistance of the fixed gain version is typically 20kΩ . The following curve shows the limits of the roll off frequency depending on the min. and max. values of Rin: LOW FREQUENCY ROLL OFF WITH OUTPUT CAPACITORS The DC voltage on the outputs of the TS486/487 is blocked by the output capacitors C OUT1 and C OUT2 . Each output capacitor COUT in series with the resistance of the load RL is equivalent to a first order high pass filter. Assuming that Fmin is the lowest frequency to be amplified (with a 3dB attenuation), the minimum value of C OUT is: C OUT > 1 / (2*π*Fmin*RL) The following curve gives directly the low roll-off frequency versus the output capacitor COUT in µF and for the two typical 16Ω and 32Ω impedances: DECOUPLING CAPACITOR C B The internal bias voltage at Vcc/2 is decoupled with the external capacitor CB . The TS486 and TS487 have a specified Power Supply Rejection Ratio parameter with CB = 1µF. A higher value of CB improves the PSRR, for example, a 4.7µF improves the PSRR by 15dB at 200Hz (please, refer to fig. 76 "PSRR vs Bypass Capacitor"). POP PRECAUTIONS Generally headphones are connected using a connector as a jack. To prevent a pop in the headphones when plugged in the jack, a resistor should be connected in parallel with each headphone output. This allows the capacitors Cout to be charged even when no headphone is plugged. A resistor of 1 k Ω is high enough to be a negligible load, and low enough to charge the capacitors Cout in less than one second. 0.01 0.1 1 10 100 1000 Rin = 100kΩ Rin = 20kΩ and fixed gain versions Rin = 10kΩ Rin = 1kΩ Low roll− off frequency (Hz) Cin (µF) Ω Ω Ω 10 100 1000 10000 100 1000 RL = 16Ω RL = 32Ω Low roll-off frequency (Hz) C OUT (F) Obsolete Product(s) - Obsolete Product(s)
DIM. mm. inch A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 E 3.80 4.00 0.150 0.157 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ˚ (max.) ddd 0.1 0.04 SO-8 MECHANICAL DATA 0016023/C Obsolete Product(s) - Obsolete Product(s)
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