SGM mW Differential Input, Stereo Audio Power Amplifier
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- Erika Curtis
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1 SGM482 2mW Differential Input, GENERAL DESCRIPTION The SGM482 is a stereo audio power amplifier with differential inputs. Operating on a single 5V power supply, it delivers 2mW of continuous RMS power per channel into a 6Ω loads with typically % THD+N. Amplifier gain is externally configured by means of two resistors per input channel and does not require external compensation. The SGM482 is designed to maximize audio performance in portable communication device applications such as mobile phone. The portable application requires audio power amplifier has minimum of external components and can operate from a single 2.7V to 5.5V power supply. The SGM482 features an externally controlled, active-high, micro-power consumption shutdown mode. Additionally, the SGM482 features an internal thermal shutdown and short circuit protection mechanism. The SGM482 is available in Green MSOP- package. It operates over an ambient temperature range of -4 to +85. FEATURES Dual Channel, Differential Inputs 2mW into 6Ω Load from 5V Power Supply at THD+N = % (Typical, per Channel) 82mW into 2Ω Load from 5V Power Supply at THD+N = % (Typical, per Channel) 2.7V to 5.5V Operation Thermal Shutdown and Short Circuit Protection Internal Pop Reduction Circuitry Internal Mid-Rail Generation Low Shutdown Current:.6μA (TYP) at 5V Shutdown Pin is Compatible with.8v Logic -4 to +85 Operating Temperature Range Available in Green MSOP- Package APPLICATIONS Portable Electronic Systems Notebook Computers Mobile Phones PDAs GPS MARCH 27 REV. A. 4
2 SGM482 2mW Differential Input, PACKAGE/ORDERING INFORMATION MODEL PACKAGE DESCRIPTION SPECIFIED TEMPERATURE RANGE ORDERING NUMBER SGM482 MSOP- -4 to +85 SGM482YMS/TR NOTE: XXXXX = Date Code and Vendor Code. PACKAGE MARKING SGM482 YMS XXXXX PACKING OPTION Tape and Reel, 4 Green (RoHS & HSF): defines "Green" to mean Pb-Free (RoHS compatible) and free of halogen substances. If you have additional comments or questions, please contact your SGMICRO representative directly. ABSOLUTE MAXIMUM RATINGS Supply Voltage... 6V Input Voltage Range... -.V to (V +) +.V Junction Temperature Storage Temperature Range to +5 Lead Temperature (Soldering, s) ESD Susceptibility HBM... 4V MM... 4V RECOMMENDED OPERATING CONDITIONS Supply Voltage Range V to 5.5V Operating Temperature Range to +85 OVERSTRESS CAUTION Stresses beyond those listed may cause permanent damage to the device. Functional operation of the device at these or any other conditions beyond those indicated in the operational section of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. ESD SENSITIVITY CAUTION This integrated circuit can be damaged by ESD if you don t pay attention to ESD protection. SGMICRO recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. DISCLAIMER reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. PIN CONFIGURATION (TOP VIEW) VO V + IN- 2 9 VO2 IN+ SGM482 8 IN2- Bypass 4 7 IN2+ GND 5 6 SHDN MSOP- MARCH 27 2
3 SGM482 2mW Differential Input, ELECTRICAL CHARACTERISTICS (T A = +25, unless otherwise specified.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage V V Shutdown Current I SD V IN = V, V SHDN = V + V + = 5V.6 2 V + =.V 2 V + = 2.7V.7 Output Offset Voltage V OS V IN = V mv Quiescent Power Supply Current I Q V IN = V, I O = A V + = 5V V + =.V V + = 2.7V.5 Shutdown Voltage Input High V SDIH.8 Shutdown Voltage Input Low V SDIL.4 Power Supply Rejection Ratio Output Power (per Channel) PSRR P O V + =.2V to.4v 74 V + = 4.9V to 5.V 7 f = khz, THD+N = % V + = 5V V + =.V V + =.V V + = 2.7V R L = 6Ω 2 R L = 2Ω 82 R L = 6Ω 46 R L = 2Ω 4 R L = 6Ω 4 R L = 2Ω 27 R L = 6Ω 22 R L = 2Ω 2 Total Harmonic Distortion + Noise THD+N P O = 6mW, V + = 5V, R L = 2Ω, f = 2Hz to 2kHz.7 % Power Supply Rejection Ratio PSRR f = 27Hz, R L = 2Ω, Input grounded with Ω, (C BYPASS =.47µF) f = khz, R L = 2Ω, Input grounded with Ω, (C BYPASS =.47µF) V + = 5V -55 V + =.V -55 V + =.V -55 V + = 2.7V -55 V + = 5V -7 V + =.V -7 V + =.V -7 V + = 2.7V -7 Wake-Up Time T WU V + = 5V, C BYPASS =.47µF.8 s Signal-to-Noise Ratio SNR V + = 5V, R L = 2Ω, P O = 6mW, BW < 8kHz -96 db Crosstalk X TALK V + = 5V, R L = 2Ω, P O = 6mW, f = khz -75 db μa ma V db mw db MARCH 27
4 SGM482 2mW Differential Input, TYPICAL PERFORMANCE CHARACTERISTICS Small Signal Step Response Small Signal Step Response Output Voltage (5mV/div) V + = V Output Voltage (5mV/div) V + = 5V Time (2μs/div) Time (2μs/div) THD+N vs. Frequency V + = V, R L = 2Ω, P = 25mW THD+N vs. Frequency V + = 5V, R L = 2Ω, P = 6mW. Frequency (khz). Frequency (khz) THD+N vs. Frequency V + = V, R L = 6Ω, P = 25mW THD+N vs. Frequency V + = 5V, R L = 6Ω, P = 8mW. Frequency (khz). Frequency (khz) MARCH 27 4
5 SGM482 2mW Differential Input, TYPICAL PERFORMANCE CHARACTERISTICS (continued) Normalized Gain (db) - -6 Small Signal Frequency Response V + = V, R L = 6Ω, V IN = -dbm Normalized Gain (db) - -6 Small Signal Frequency Response V + = 5V, R L = 6Ω, V IN = -dbm -9 Frequency (MHz) -9 Frequency (MHz) Normalized Gain (db) - -6 Small Signal Frequency Response V + = V, R L = 2Ω, V IN = -dbm Normalized Gain (db) - -6 Small Signal Frequency Response V + = 5V, R L = 2Ω, V IN = -dbm -9 Frequency (MHz) -9 Frequency (MHz) THD+N vs. Output Pow er per Channel V + = V, R L = 6Ω, f = khz, BW < 8kHz THD+N vs. Output Pow er per Channel V + = 5V, R L = 6Ω, f = khz, BW < 8kHz... MARCH 27 5
6 SGM482 2mW Differential Input, TYPICAL PERFORMANCE CHARACTERISTICS (continued) THD+N vs. Output Pow er per Channel V + = V, R L = 2Ω, f = khz, BW < 8kHz THD+N vs. Output Pow er per Channel V + = 5V, R L = 2Ω, f = khz, BW < 8kHz.. Power Dissipation (W) Pow er Dissipation vs. Output Pow er per Channel V + = V R L = 6Ω f = khz THD+N < % Power Dissipation (W) Pow er Dissipation vs. Output Pow er per Channel V + = 5V R L = 6Ω f = khz THD+N < % Pow er Dissipation vs. Output Pow er per Channel.6 Pow er Dissipation vs. Output Pow er per Channel Power Dissipation (W) 5.5 V + = V R L = 2Ω f = khz THD+N < %.2..4 Power Dissipation (W) V + = 5V R L = 2Ω f = khz THD+N < % MARCH 27 6
7 SGM482 2mW Differential Input, TYPICAL PERFORMANCE CHARACTERISTICS (continued) Output Power (W) Output Pow er vs. Supply Voltage RL = 2Ω f = khz BW < 8kHz THD+N % THD+N % THD+N % Supply Voltage (V) Output Power (W) Output Pow er vs. Supply Voltage RL = 6Ω f = khz BW < 8kHz THD+N % THD+N % THD+N % Supply Voltage (V) Wake-Up Time (s) Wake-Up Time vs. Bypass Capacitance V + = 5V R L = 6Ω C O = 22µF Bypass Capacitance (µf) MARCH 27 7
8 SGM482 2mW Differential Input, TYPICAL APPLICATION R F 2kΩ Right In (Differential) C BYPASS.47μF _ + + Left In (Differential) _ C I.9μF C I.9μF R I 2kΩ C I R I.9μF 2kΩ C I.9μF R I 2kΩ R I 2kΩ R F 2kΩ R F 2kΩ IN- IN+ Bypass IN2+ IN2- V + /2 _ + Bias Control + _ VO SHDN VO2 C O 22μF kω C O 22μF V + C S μf To External Power Supply or Control I/O GND R F 2kΩ NOTE:. A kω resistor must be serially connected to SHDN pin. REVISION HISTORY NOTE: Page numbers for previous revisions may differ from page numbers in the current version. MARCH 27 REV.A. to REV.A.4 Changed Packing Option... 2 NOVEMBER 22 REV.A.2 to REV.A. Added note for Typical Application circuit... 8 MAY 22 REV.A. to REV.A.2 Added Tape and Reel Information... - AUGUST 2 REV.A to REV.A. Updated Electrical Characteristics... Changes from Original (JUNE 28) to REV.A Changed from product preview to production data... All MARCH 27 8
9 PACKAGE INFORMATION PACKAGE OUTLINE DIMENSIONS MSOP- b E E 4.8 e.2..5 RECOMMENDED LAND PATTERN (Unit: mm) D L A A A2 c θ Symbol Dimensions In Millimeters Dimensions In Inches MIN MAX MIN MAX A A A b c D E E e.5 BSC.2 BSC L θ 6 6 TX5.
10 PACKAGE INFORMATION TAPE AND REEL INFORMATION REEL DIMENSIONS TAPE DIMENSIONS P2 P W Q Q2 Q Q2 Q Q2 B Q Q4 Q Q4 Q Q4 Reel Diameter P A K Reel Width (W) DIRECTION OF FEED NOTE: The picture is only for reference. Please make the object as the standard. KEY PARAMETER LIST OF TAPE AND REEL Package Type Reel Diameter Reel Width W A B K P P P2 W Pin Quadrant MSOP Q DD TX.
11 PACKAGE INFORMATION CARTON BOX DIMENSIONS NOTE: The picture is only for reference. Please make the object as the standard. KEY PARAMETER LIST OF CARTON BOX Reel Type Length Width Height Pizza/Carton DD2 TX2.
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