AN7504SB PANASONIC
Document overview
- Manufacturer or author: Provided By digicamel.com
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Technical content
1Publication date: December 2001 SDC00029BEB AN7504SB Pre-amp. and power amp. IC for 1.5 V headphone stereo I Overview The AN7504SB is a low voltage operation headphone amp. IC for headphone C-cassette stereo. It incorporates tape selector, pre-amp. , soft AGC bass-boost circuit, etc. I Features
- Low voltage operation (0.98 V to 2.0 V)
- Tape selector switch built-in
- Low frequency boost function with soft AGC I Applications
- Headphone stereo I Block Diagram SSOP028-P-0375A Unit: mm 0.3±0.1 0.1±0.1 (0.4) 2.05±0.2 0.9±0.1 0.9 ±0.1 0.2 +0.1 −0.05 11.6±0.3 9.3±0.3 7.2±0.3 0.8 12 8Pre-in (R) VREF Pre-in (L) Pre-out (R) Low BST Tape-select Pre-out (L) PWR-in (L) PWR-in (R) VRPF PWR-out (L) VCCP PWR-out (R) REV/FWD/ Pre-mute STB/PWR mute GND 2 27 3 26 4 25 5 24 6 23 7 22 8 21 9 20 10 19 11 18 12 17 13 16 14 15 Control FWD/REV Pre-mute Ripple filterBias AGC Note) The package of this product will be changed to lead-free type (SSOP028-P-0375E). See the new package dimensions section later of this datasheet.
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I Absolute Maximum Ratings Parameter Symbol Rating Unit Supply voltage V CC 2.1 V Supply current I CC 20 mA Power dissipation *2 PD 42 mW Operating ambient temperature *1 Topr −20 to +70 °C Storage temperature *1 Tstg −55 to +125 °C I Recommended Operating Range Parameter Symbol Range Unit Supply voltage V CC 0.98 to typ. 1.2 to 2.0 V I Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32 Ω, Ta = 25°C Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for T a = 25°C. Keep VCC (0.95 V to 0.98 V) free from any abnormal operation such as oscillation. *2: The power dissipation shown is the value for T a = 75°C. For the independent IC without a heat sink. Parameter Symbol Conditions Min Typ Max Unit Voltage gain G V VO = −22.2 dBV 54 57 60 dB Circuit current 1 I CC1 VIN = 0, RG = 2.2 kΩ, LBST off 2.2 5.3 mA Pre-amp. block Closed circuit voltage gain G VC(PB) VO = −22.2 dBV 32.5 34 35.5 dB Max. output voltage V Omax(PB) THD = 1%, 30 kHz LPF on 120 210 mV Total harmonic distortion THD (PB) VO = 22.2 dBV, 30 kHz LPF on 0.2 0.6 % GVC = 35 dB (NAB) Output noise voltage V NO(PB) RG = 2.2 kΩ, 1HF-A − 90 −76 dBV Mute attenuation G MUTE(PB) Ratio as VO = −22.2 dBV − 85 −70 dB Pre-mute on Boost low sound and power amp. block Voltage gain 1 G V1(PW) VO = −22.2 dBV 21 23 25 dB Voltage gain 2 G V2(PW) LBOOST on, VO = −22.2 dBV 21.4 23.4 25.4 dB Rating output power P OUT THD = 10%, 30 kHz LPF on 2.5 4.5 mW Total harmonic distortion THD (PW) POUT = 1 mW, 30 kHz LPF on 0.35 1.3 % Output noise voltage 1 V NO1(PW) RG = 0.1, 1HF-A − 91 −86 dBV Output noise voltage 2 V NO2(PW) LBOOST on, RG = 0, 1HF-A − 86 −82 dBV Channel balance CB (PW) VO = −22.2 dBV −1.5 0 1.5 dB Mute output voltage V MUTE(PW) VIN = −32.2 dBV − 96 −90 dBV AGC level V AGC VIN = −45.2 dBV, f = 100 Hz −17.3 −14.7 −13.1 dBV RL = 32 Ω AGC level: 32 Ω edge measure
I Electrical Characteristics at VCC = 1.2 V, f = 1 kHz, RL = 32 Ω, Ta = 25°C (continued) Parameter Symbol Conditions Min Typ Max Unit Ripple filter block Ripple rejection ratio RR V CC = 1.1 V, VRR = −32.2 dBV 24 30 dB fRR = 100 Hz, IRFO = 15 mA BPF: 100 Hz, 1/4 OCT DC output voltage V RPF VCC = 1.0 V, IRFO = 15 mA 0.89 0.94 V Bias block DC output voltage V REF VCC = 1.0 V 0.68 0.76 0.83 V Control block Threshold voltage at V STON Low: Power off 0.1 V standby on Threshold voltage at V STOFF Open: Power on − 0.2 0.2 V standby off (Power mute on) VSTOFF = 1/2VCC − V13 Bias voltage at V MTOFF Open: Power mute off 0.1 V power mute off V MTOFF = VCC − V13 Low threshold at V TH1L Low: REV 0.1 V FWD/REV/pre-mute High threshold at V TH1H High: Pre-mute on 0.1 V FWD/REV/pre-mute V THIH = VCC − V1 Low threshold at low boost V LBOFF Low: LBOOST off 0.3 V off Low threshold at tape select V TPOFF Low: Tape-select off 0.3 V off Parameter Symbol Conditions Min Typ Max Unit Circuit current 2 I CC2 POUT = 0.5 mW, × 2-ch., RL = 32 Ω 6.5 11.2 mA Boost low sound and power amp. block Input resistance R IN(PW) 7.2 9.5 12 k Ω
- Design reference data Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
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I Terminal Equivalent Circuits Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of I C. Pin No. Equivalent circuit Description Waveform (typ.)
1 PB-in (R):
Playback amp. input DC 0.78 V AC −66.2 dBV 2V REF: ɹɹɹDC 0.78 V Reference voltage output
3 Refer to pin 1 PB-in (L): Refer to pin 1
Playback amp. input 4 Refer to pin 2 V REF-in: DC 0.78 V Reference voltage input 5 RF-in: DC 1.0 V Ripple filter reference voltage input 6 RF-base: DC 0.47 V Ripple filter 7V RPF: DC 1.13 V Ripple filter reference voltage output Pins 26, 28 Pins 25, 27 VCC GND VREF Pins 1,3 200 kΩ 25 kΩ GND GND 70 kΩ 350 kΩ 100 kΩ 14 kΩ VCC GND GND GND
Pin No. Equivalent circuit Description Waveform (typ.)
8 AGC-TAU:
9 PWR-out (L):
Power amp. voltage output DC 0.6 V AC −8.8 dBV 10 GND: 0 V GND pin 11 VCC: 1.2 V Power supply pin
12 Refer to pin 9 PWR-out (R): Refer to pin 9
Power amp. voltage output
13 STBY, PWR mute CNT:
Pin open: VCC − V13 < 0.1 V PWR-mute on − 0.2 V < 1/2VCC − V13 < 0.2 V STBY on V13 < 0.1 V
14 FWD/REV/Pre-mute:
Voltage high: VCC − 0.1 < V14-19 FWD Pin open REV Voltage low: V14-19 < 0.1 VRPF GND VCC GND Pins 9, 12 60 kΩ 4 kΩ VRPF GND 220 kΩ 120 kΩ VRPF GND 120 kΩ I Terminal Equivalent Circuits (continued) Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of I C.
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Pin No. Equivalent circuit Description Waveform (typ.)
15 L-BST CNT: DC 0 V
Voltage low: − 0.3 V < V11-19 < 0.3 V
16 L-BST C:
DC 0.78 V
17 LPF2-C:
DC 0.78 V
18 L-BST C1:
DC 0.78 V 50 kΩ 50 kΩ 10 kΩ VRPF GND 15 kΩ 7.5 kΩ 7.5 kΩ 15 kΩ GND VREF 45 kΩ 7.5 kΩ 15 kΩ GND VRPF VREF 3 kΩ 30 kΩ 30 kΩ 3 kΩ GND VRPF VREF I Terminal Equivalent Circuits (continued) Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of I C.
Pin No. Equivalent circuit Description Waveform (typ.)
19 PWR-in (R):
Power amp. input DC 0.78 V AC −32.2 dBV 20 LPF1-C: DC 0.78 V LPF C pin
21 PWR-in (L): Refer to pin 19
Power amp. input ɹ 22 Tape-select on/off: Tape select driver
23 Tape-select on/off:
24 Tape-select on/off CNT:
V24 < 0.3 V
25 Refer to pin 1 PB-out (L):
Playback amp. output DC 0.6 V AC −32.2 dBV 19 90 kΩ 10 kΩ 2 kΩ 12 kΩ+ GND VRPF VREF VREF GND 90 kΩ 10 kΩ VRPF GND Pins 22, 23 GND VRPF 360 kΩ 20 kΩ I Terminal Equivalent Circuits (continued) Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of I C.
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Pin No. Equivalent circuit Description Waveform (typ.)
26 Refer to pin 1 PB-NF(L):
Playback amp. negative feedback input DC 0.78 V
27 Refer to pin 1 PB-OUT(R): Refer to pin 25
Playback amp. input
28 Refer to pin 1 PB-NF(R): Refer to pin 26
Playback amp. negative feedback input I Application Notes 1. Operation logic of control pin Pin 24 Low High or Open Tape select control Off (Pins 22, 23 High) On (Pins 22, 23 Low) Pin 14 Low Open High Pre-amp. system control Reverse Forward Mute Input pin → Output pin Input pin → Output pin Pin 1 → Pin 25 Pin 1 → Pin 27 Pin 3 → Pin 27 Pin 3 → Pin 25 Pin 13 Low 1 Low 2 High Power amp. system control Standby on Standby off, Mute on Mute on Low 1: Short-circuit to GND Low 2: 0.6 V application or short circuit to GND with 220 k Ω I Terminal Equivalent Circuits (continued) Note) The values mentioned below are the typical ones and is subject to change due to application condition and dispersion of I C.
I Application Notes (continued) 2. Main characteristics 1. Pre-amp. output frequency characteristics 2. Distortion and amplitude at pre-amp. output Input Distortion/output voltage 3. Distortion and amplitude characteristics of headphone amp. 4. Headphone amp. Input Distortion/output voltage Output Input 5. Headphone amp. 6. Distortion and amplitude at headphone amp. output Output Frequency Input Distortion/output voltage −50 −40 −30 −20 −10 10 100 1k 10k 100k Frequency (Hz) Output (dBV) VCC = 1.2 V 0.01 0.1 0.1 −60 −50 −40 Input amplitude (dBV) Distortion (%) VCC = 1.2 V f = 1 kHz Distortion Output voltage Output voltage (V) 0.01 0.01 0.1 0.1 Input amplitude (dBV) Distortion (%) Distortion Outpu voltage Output voltage (V) VCC = 1.2 V f = 1 kHz RL = 32 Ω Low boost off 0.01 −40 −30 −20 −10 Input amplitude (dBV) Output (dBV) VCC = 1.2 V f = 100 Hz Low boost on 32 Ω end DETC = 0.047 µF 0.01 0.1 0.1 Input amplitude (dBV) Distortion (%) Distortion Output voltage (V) VCC = 1.2 V f = 100 Hz RL = 32 Ω Low boost on 0.01 Output voltage −50 −40 −30 −20 10 100 1k 10k 100k Frequency (Hz) Output (dBV) PWR system VCC = 1.2 V PL = 32 Ω Low boost on
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I Application Notes (continued) 2. Main characteristics (continued) 7. Ripple filter output voltage (pin 7) 8. Ripple filter output voltage (Using at 15 mA of current) 9. VCC VREF 10. Pin 2 (VREF) at standby on/off and voltage at pin 7 (Ripple filter) 11. Headphone amp. at mute on/off 12. V CC I total (Pin 9) output voltage 2.0 2.5 V11 (V) 2.5 V7 (V)1.5 1.0 1.50.5 2.01.0 0.5 V7 (V) 2.0 2.5 V11 (V) 2.5 1.5 1.0 1.50.5 2.01.0 0.5 1.0 0 2.5 VREF (V) 0.5 VCC (V) 1.0 2.0 1.0 1.2 01 . 2 STBY on 0.5 0.5 1.0 V7 (V) V13 (V) 1.0 Headphone amp. output voltage V9 (V)Mute on 1.0 0.5 0.5 V13 (V) Mute off 0 2.5 I total (mA) 0.5 1 1.5 2 V11 (V)
I Application Circuit Examples 1. Application circuit example REV FWD Pre mute : Low : Open : High STBY on PWR mute on PWR mute off : Low1 : Low2 : Open REV FWD Pre-mute Base boost Tape-select on Tape-select off : Open : Low R1 2.2 kΩ R2 2.2 kΩ OnOff C19 1 µF C17 1 µF C25 1 µF C1 1 µF C3 1 µF C2 22 µF C6 22 µF C7 0.47 µF C4 2.2 µF C5 33 µF C13 1 µF C21 0.022 µF R8 2.7 kΩ R6 50 kΩ C20 0.022 µF R7 2.7 kΩ C26 0.022 µF C27 33 µF R13 6.8 kΩ R14 180 Ω C22 1 µF C23 0.022 µF C24 33 µF R11 6.8 kΩ R12 180 Ω 2.2 kΩ R10 2.2 kΩ VCC1 12 8Pre-in (R) VREF Pre-in (L) Pre-out (R) Tape-select Pre-out (L) Head-phone in (L) Head-phone in (R) VRPF PWR mute on 2 27 3 26 4 25 5 24 6 23 7 22 8 21 9 20 10 19 11 18 12 17 13 16 14 15 Control FWD/REV Pre-mute Ripple filterBias AGC C16 6.8 µF C15 0.15 µF C14 6.8 µFSTBY on PWR mute off 220 kΩ R4 2.2 Ω C11 100 µF C12 0.1 µF Head-phone out (R) C10 47 µF VCCP GND 2.2 Ω C8 100 µF C9 0.1 µF Head-phone out (L) TR* C18 0.1 µF Note) *: The low VCE(SAT) PNP TR be used as TR.
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I Application Circuit Examples (continued) 2. Evaluation board C13 R11 C25 C27 C24 C22 C10 C9 C8 C19 C18 C17 C16 C15 C14 C11 C12 C26 C23 C21 C20 R6On Base boost Off R10 R13 R14 R12 Pre out R-ch. Pre out L-ch. Head-phone In R-ch. Head-phone Out L-ch. Head-phone Out R-ch. Pre-amp. in L-ch. Pre-amp. in R-ch. Head-phone In L-ch. Off Tape-select On Off VCC On TR AN7504SB REV FWD Pre-amp. Mute STBY Mute off Head-phone Mute I New Package Dimensions (Unit: mm)
- SSOP028-P-0375E (Lead-free package) 7.20±0.20 11.60±0.20 0.30+0.10 -0.05 0.20 +0.10 -0.05 0° to 10° (1.05) (0.40) Seating plane Seating plane (0.60) 0.80
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