High Fidelity, Low Power, Integrated Stereo Audio Amplifier Data Sheet SSM6322 FEATURES FUNCTIONAL BLOCK DIAGRAM 24 23 20 19 21 Flexible architecture to interface with all digital-to-analog GAIN1 FILT1 VEE1 VCC1 GND4 converters (DACs) Accepts differential current or voltage input (provides SSM6322 VP1 single-ended voltage output) 2 INPUT High output current drive capability VOUT1 VN1 1 18 OUTPUT Greater than 100 mA rms output current Accurately reproduces large music transients into heavy 3 GND1 VNFB1 17 loads (16 to 32 ) REF1 SD 22 Excellent audio fidelity 16 121 dB total harmonic distortion plus noise (THD + N) at REF2 9 1 kHz, 2 V rms output with 5 V supply and 32 load SD2 15 Low output integrated noise (10 Hz to 22 kHz) of 4 GND2 1.8 V rms with A-weighted filter VP2 5 Supply range: 3.3 V to 6 V (typical) INPUT VOUT2 VN2 Low power operation 6 13 OUTPUT Enabled: 60 mW, V = +5 V, V = 5 V CC EE VNFB2 Disabled/voice select: <30 A 14 Low power disable mode with high output impedance VEE2 VCC2 GAIN2 FILT2 GND3 High-Z in power-down mode eliminating voice mode 11 7 12 8 10 switch from the high fidelity path Figure 1. Greater than 87 dB power supply rejection ratio (PSRR) at GENERAL DESCRIPTION 20 kHz Adjustable input common-mode voltage with resistor The SSM6322 is an integrated, dual-channel audio amplifier programmable reference voltage solution that interfaces directly with audio DAC/CODEC, 1.45 V (typical) with no external components maximizing the fidelity of high fidelity audio signal chains. The Capable of two single-pole, low-pass filters in series highly efficient design of the SSM6322 delivers outstanding 2.2 nF maximum input capacitor audio performance while minimizing power dissipation for Second filter between the GAINx and FILTx pins maximum battery life in portable applications. Pop and click noise suppression The SSM6322 features 121 dB THD + N at 1 kHz, along Signal chain integration supports small printed circuit board with very low output noise from 20 Hz to 20 kHz. The low power (PCB) area operation, high peak output current, and high PSRR make the Compact 4 mm 4 mm LFCSP package SSM6322 an ideal candidate for applications that require high fidelity audio, high dynamic range, precision, and low power. This APPLICATIONS highly integrated drive solution also reduces development time High fidelity headphone drivers while reducing board space and minimizing external components. Mobile phones Bluetooth speakers and headphones The SSM6322 is available in a 24-lead LFCSP package. The Gaming notebooks and tablets SSM6322 operates over the industrial temperature of 40C to A/V receivers +85C. Professional audio equipment Audio test equipment Automobile infotainment systems Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. No Tel: 781.329.4700 2017 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 15260-001SSM6322 Data Sheet TABLE OF CONTENTS Features .............................................................................................. 1 Typical Performance Characteristics ..............................................8 Applications ....................................................................................... 1 Test Circuit ...................................................................................... 14 Functional Block Diagram .............................................................. 1 Theory of Operation ...................................................................... 15 General Description ......................................................................... 1 Applications Information .............................................................. 16 Revision History ............................................................................... 2 Headphone Drivers in Mobile Phones .................................... 16 Specif icat ions ..................................................................................... 3 Common-Mode Control Circuit .............................................. 16 5 V Supply ................................................................................... 3 Capacitive Load Drive ............................................................... 17 3.3 V Supply ................................................................................ 4 SSM6322 in a Headphone Driver Application ....................... 18 Absolute Maximum Ratings ............................................................ 6 Design Guidelines ...................................................................... 19 Thermal Resistance ...................................................................... 6 Outline Dimensions ....................................................................... 20 ESD Caution .................................................................................. 6 Ordering Guide .......................................................................... 20 Pin Configuration and Function Descriptions ............................. 7 REVISION HISTORY 3/2017Revision 0: Initial Version Rev. 0 Page 2 of 20