G1427 GMT | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 16
Technical content
Features
Internal Gain Control, Which Eliminates Exter- nal Gain-Setting Resistors Depop Circuitry Integrated Output Power at 1% THD+N, VDD=5V --2.0W/CH (typical) into a 4Ω Load --1.2W/CH (typical) into a 8Ω Load Bridge-Tied Load (BTL), Single-Ended (SE) Stereo Input MUX PC-Beep Input Fully differential Input Shutdown Control Available Surface-Mount Power Package 24-Pin TSSOP-P
Applications
Stereo Power Amplifiers for Notebooks or Desktop Computers Multimedia Monitors Stereo Power Amplifiers for Portable Audio Systems General Description G1427 is a stereo audio power amplifier in 24pin TSSOP thermal pad package. It can drive 2.0W con- tinuous RMS power into 4 Ω load per channel in Bridge-Tied Load (BTL) mode at 5V supply voltage. Its THD is smaller than 1% under the above operation condition. To simplify the audio system design in the notebook application, G1427 supports the Bridge-Tied Load (BTL) mode for driving the speakers, Single-End (SE) mode for driving the headphone. For the low current consumption applications, the SHDN mode is supported to disable G1427 when it is idle. The current consumption can be reduced to 160µA (typically). Amplifier gain is internally configured and controlled by two terminals (GAIN0, GAIN1). BTL gain settings of 6dB, 10dB, 15.6dB, 21.6dB are provided, while SE gain is always configured as 4.1dB (inverting) for headphone driving. G1427 also supports two input paths, that means two different amplitude AC signals can be applied and chosen by setting HP/ LINE pin. It enhances the hardware designing flexibility.
Ordering Information
(Pb free) TEMP. RANGE PACKAGE G1427F31U G1427F31Uf -40°C to +85°C TSSOP-24 (FD) Note: U:Tape & Reel ( F D ) : T h e r m a l P a d Pin Configuration ROUT+ RHPIN VDD PVDD HP/LINE ROUT- PC-BEEP GND/HS GAIN1 LOUT+ LLINEIN LPHIN PVDD SHUTDOWN LOUT- G1427 GND/HS TSSOP-24 GAIN0 RLINEIN Thermal Pad Top View Bottom View GND/HSGND/HS RIN LIN BYPASS SE/BTL ROUT+ RHPIN VDD PVDD HP/LINE ROUT- PC-BEEP GND/HS GAIN1 LOUT+ LLINEIN LPHIN PVDD SHUTDOWN LOUT- G1427 GND/HS TSSOP-24 GAIN0 RLINEIN Thermal Pad Top View Bottom View GND/HSGND/HS RIN LIN BYPASS SE/BTL
Ver: 1.3 Sep 23, 2005 TEL: 886-3-5788833 http://www.gmt.com.tw G1427Global Mixed-mode Technology Inc. Absolute Maximum Ratings Operating Ambient Temperature Range T Maximum Junction Temperature, TJ…..……….….150°C Storage Temperature Range, TSTG….…-65°C to+150°C Reflow Temperature (soldering, 10sec)……..……260°C Power Dissipation (1) Electrostatic Discharge, VESD Note: (1) : Recommended PCB Layout (2) : Human body model : C = 100pF, R = 1500Ω, 3 positive pulses plus 3 negative pulses
Electrical Characteristics
PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT Supply voltage VDD V DD 4.5 5 5.5 V High-Level Input voltage, VIH V IH SE/ BTL , HP/ LINE , SHUTDOWN , GAIN0, GAIN1 2 --- --- V Low-Level Input voltage, VIL V IL SE/ BTL , HP/ LINE , SHUTDOWN , GAIN0, GAIN1 --- --- 0.8 V DC Differential Output Voltage V O(DIFF) V DD = 5V,Gain = 2 --- 5 50 mV Stereo BTL 7.5 13 Supply Current in Mute Mode I DD V DD = 5V Stereo SE --- 4 7 mA IDD in Shutdown I SD V DD = 5V --- 160 300 µA (AC Operation Characteristics, VDD = 5.0V, TA=+25°C, RL = 4Ω, unless otherwise noted) PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT THD = 1%, BTL, RL = 4Ω G=-2V/V --- 2 --- THD = 1%, BTL, RL = 8Ω G=-2V/V --- 1.25 --- THD = 10%, BTL, RL = 4Ω G=-2V/V --- 2.5 --- THD = 10%, BTL, RL = 8Ω G=-2V/V --- 1.6 --- W Output power (each channel) see Note P (OUT) THD = 0.1%, SE, RL = 32Ω --- 85 --- mW PO = 1.6W, BTL, RL = 4Ω G=-2V/V --- 100 --- PO = 1W, BTL, RL = 8Ω G=-2V/V --- 60 --- PO = 75mW, SE, RL = 32Ω --- 80 --- Total harmonic distortion plus noise THD+N VI = 1V, RL = 10KΩ, SE --- 30 --- Maximum output power bandwidth B OM THD = 5% --- >15 --- kHz Power supply ripple rejection PSRR F=1kHz, BTL mode G=-2V/V CBYP=1µF --- 68 --- dB Channel-to-channel output separation f = 1kHz --- 80 --- dB Line/HP input separation --- 80 --- dB BTL attenuation in SE mode --- 85 --- dB Input impedance ZI See Table 2 MΩ Signal-to-noise ratio P O = 500mW, BTL, G=-2V/V --- 90 --- dB Output noise voltage V n BTL, G=-2V/V, A Weighted filter --- 45 --- µV (rms) Note :Output power is measured at the output terminals of the IC at 1kHz.
Ver: 1.3 Sep 23, 2005 TEL: 886-3-5788833 http://www.gmt.com.tw G1427Global Mixed-mode Technology Inc. Pin Description PIN NAME I/O FUNCTION 1,12,13,24 GND/HS Ground connection for circui try, directly connected to thermal pad.
2 GAIN0 I Bit 0 of gain control
3 GAIN1 I Bit 1 of gain control
4 LOUT+ O Left channel + output in BTL mode, + output in SE mode. 5 LLINEIN I Left channel line input, selected when HP/LINE pin is held low. 6 LPHIN I Left channel headphone input, selected when HP/LINE pin is held high. 7,18 PVDD I Power supply for output stages. 8 RIN I Common right input for fully differ ential inputs. AC ground for single-ended inputs. 9 LOUT- O Left channel - output in BT L mode, and high impedance in SE mode. 10 LIN I Common left input for fully different ial inputs. AC ground for single-ended inputs. 11 BYPASS Tap to voltage divider fo r internal mid-supply bias generator. 14 PC-BEEP I The input for PC-BEEP mode. PC- BEEP is enabled when at least eight continuous > 1-VPP (peak to peak) square waves is input to PC-BEEP pin. 15 SE/ BTL I Hold low for BTL mode, hold high for SE mode. 16 ROUT- O Right channel - output in BT L mode, high impedance state in SE mode.
17 HP/ LINE I MUX control input, hold high to select headphone inputs (6,20), hold low to select line
inputs (5,23). 19 VDD Analog VDD input supply. This term inal needs to be isolated from PVDD to achieve highest performance. 20 RHPIN I Right channel headphone input, selected when HP/LINE pin is held high. 21 ROUT+ O Right channel + output in BT L mode, positive output in SE mode. 22 SHUTDOWN I Places entire IC in shutdown mode when held low, expect PC-BEEP remains active. 23 RLINEIN I Right channel line input, selected when HP/LINE pin is held low.
Ver: 1.3 Sep 23, 2005 TEL: 886-3-5788833 http://www.gmt.com.tw G1427Global Mixed-mode Technology Inc. Block Diagram Power Management Right MUX ROUT+ ROUT- PVDD VDD SHUTDOWN LOUT+ LOUT- RLINEIN RHPIN RIN PC-Beep Depop Circuitry Gain/MUX Control PC-Beep BYPASS Left MUX LIN GAIN0 GAIN1 SE/BTL HP/LINE LLINEIN LHPIN GND Power Management Right MUX ROUT+ ROUT- PVDD VDD SHUTDOWN LOUT+ LOUT- RLINEIN RHPIN RIN PC-Beep Depop Circuitry Gain/MUX Control PC-Beep BYPASS Left MUX LIN GAIN0 GAIN1 SE/BTL HP/LINE LLINEIN LHPIN GND
Ver: 1.3 Sep 23, 2005 TEL: 886-3-5788833 http://www.gmt.com.tw G1427Global Mixed-mode Technology Inc. Application Circuit Application Circuit Using Differential Inputs Note: 1µF ceramic capacitor should be placed as close as possible to the IC to filter the higher-frequency noise. Power Management Right MUX ROUT+ ROUT- PVDD VDD SHUTDOWN LOUT+ LOUT- RLINEIN RHPIN RIN PC-Beep Depop Circuitry Gain/MUX Control PC-Beep BYPASS Left MUX LIN GAIN0 GAIN1 SE/BTL HP/LINE LLINEIN LHPIN GND 0.1µF 220µF 100K 220µF VDD 7,18 VDD 1µF 10µF 1,12,13,24 1µF 1µF 1µF 2.2µF Left Hpin Negative Differential Input Left Hpin/Linein Positive Differential Input Left Linein Negative Differential Input PC-BEEP Input Signal 1µF Right Hpin/Linein Positive Differential Input 1µF Right Hpin Negative Differential Input 1µF 1µF Right Linein Negative Differential Input Note Power Management Right MUX ROUT+ ROUT- PVDD VDD SHUTDOWN LOUT+ LOUT- RLINEIN RHPIN RIN PC-Beep Depop Circuitry Gain/MUX Control PC-Beep BYPASS Left MUX LIN GAIN0 GAIN1 SE/BTL HP/LINE LLINEIN LHPIN GND 0.1µF 220µF 100K 220µF VDD 7,18 VDD 1µF 10µF 1,12,13,24 1µF 1µF 1µF 2.2µF Left Hpin Negative Differential Input Left Hpin/Linein Positive Differential Input Left Linein Negative Differential Input PC-BEEP Input Signal 1µF Right Hpin/Linein Positive Differential Input 1µF Right Hpin Negative Differential Input 1µF 1µF Right Linein Negative Differential Input Note
Ver: 1.3 Sep 23, 2005 TEL: 886-3-5788833 http://www.gmt.com.tw G1427Global Mixed-mode Technology Inc. Application Circuit (continued) Application Circuit Using Single-Ended Inputs Note: 1µF ceramic capacitor should be placed as close as possible to the IC to filter the higher-frequency noise. Power Management Right MUX ROUT+ ROUT- PVDD VDD SHUTDOWN LOUT+ LOUT- RLINEIN RHPIN RIN PC-Beep Depop Circuitry Gain/MUX Control PC-Beep BYPASS Left MUX LIN GAIN0 GAIN1 SE/BTL HP/LINE LLINEIN LHPIN GND 0.1µF 220µF 100K 220µF VDD 7,18 VDD 1µF 10µF 1,12,13,24 1µF 1µF 1µF 2.2µF Left Linein Input PC-BEEP Input Signal 1µF 1µF Right Hpin Input 1µF 1µFRight Linein Input Left Hpin Input Note Power Management Right MUX ROUT+ ROUT- PVDD VDD SHUTDOWN LOUT+ LOUT- RLINEIN RHPIN RIN PC-Beep Depop Circuitry Gain/MUX Control PC-Beep BYPASS Left MUX LIN GAIN0 GAIN1 SE/BTL HP/LINE LLINEIN LHPIN GND 0.1µF 220µF 100K 220µF VDD 7,18 VDD 1µF 10µF 1,12,13,24 1µF 1µF 1µF 2.2µF Left Linein Input PC-BEEP Input Signal 1µF 1µF Right Hpin Input 1µF 1µFRight Linein Input Left Hpin Input Note
Ver: 1.3 Sep 23, 2005 TEL: 886-3-5788833 http://www.gmt.com.tw G1427Global Mixed-mode Technology Inc.
Package Information
NOTE: 1. Package body sizes exclude mold flash protrusions or gate burrs 2. Tolerance ±0.1mm unless otherwise specified 3. Coplanarity : 0.1mm 4. Controlling dimension is millimeter. Converted inch dimensions are not necessarily exact. 5. Die pad exposure size is according to lead frame design. 6. Follow JEDEC MO-153 Taping Specification PACKAGE Q’TY/REEL TSSOP-24 (FD) 2,500 ea GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications. Feed Direction Typical TSSOP Package Orientation Feed Direction Typical TSSOP Package Orientation E1 E D b A C L θ e 3.851.88 1.88 2.8 0.71 Note 5 E1 E D b A C L θ e 3.851.88 1.88 2.8 0.71 Note 5