SSM6322ACPZ-R7

Overview

The SSM6322ACPZ-R7 is a high-fidelity, low-power integrated stereo audio amplifier manufactured by Analog Devices Inc. It operates within a supply range of ±3.3 V to ±6 V and features flexible architecture compatible with all digital-to-analog converters (DACs). The device accepts differential current or voltage inputs and provides single-ended voltage outputs. Key electrical specifications include a gain bandwidth of 25 MHz, a slew rate of 18 V/μs at ±5 V supply, and an output offset voltage of 250 μV maximum. It delivers greater than 100 mA rms output current into heavy loads and achieves −121 dB THD + N at 1 kHz with a 32 Ω load.

Feature Summary

• Flexible architecture supporting direct interface with digital-to-analog converters via differential current or voltage inputs
• High output current drive capability for accurate reproduction of large music transients into heavy loads
• Integrated pop and click noise suppression with adjustable input common-mode voltage
• Low power operation featuring high-Z power-down mode to eliminate voice mode switching artifacts

Applications

• High fidelity headphone drivers
• Mobile phones
• Bluetooth speakers and headphones
• Gaming notebooks and tablets
• A/V receivers

Procurement Notes

Verify the specific ordering suffix R7 against the manufacturer's official documentation to confirm reel packaging quantity and tape specifications. Ensure the LFCSP-24 package variant matches the required PCB footprint and thermal pad connection guidelines. Cross-reference the revision history to confirm the component version aligns with the design requirements.

Selection Notes

Select this component for applications requiring high dynamic range and precision audio amplification with minimal external components. The integrated signal chain reduces development time and board space compared to discrete solutions. Consider the dual shutdown pins for managing power states and ensuring clean transitions between audio paths in portable devices.

Part Context

The SSM6322 belongs to the Analog Devices audio amplifier family, designed using proprietary XFCB process technology. It combines a difference amplifier configuration with a common-mode loop to maintain optimal DAC operating conditions. This integration minimizes noise and power consumption while eliminating additional amplifiers from the signal path.

Replacement Considerations

Consult the manufacturer's datasheet for officially listed alternative part numbers or pin-compatible upgrades. Verify that any substitute maintains the same LFCSP-24 package dimensions and electrical characteristics.

FAQ

How does the SSM6322 handle common-mode control for current output DACs?

The device implements a common-mode loop that maintains a fixed common-mode input level regardless of differential currents, ensuring the DAC operates under optimal conditions for best distortion performance.

What is the function of the two shutdown pins on the SSM6322?

The SD pin disables the output buffer while keeping the input stage enabled, whereas the SD2 pin disables the entire device, reducing quiescent current to 15 μA.