SSM6322ACPZ-RL

Overview

The SSM6322ACPZ-RL is a dual-channel audio amplifier from Analog Devices, housed in a 24-lead LFCSP package. It operates on a supply voltage ranging from ±3.3 V to ±6 V. The device delivers high output current drive capability, exceeding 100 mA rms into heavy loads such as 16 Ω or 32 Ω impedances. Key performance metrics include a gain bandwidth of 25 MHz and a slew rate of 18 V/μs at ±5 V. Distortion is minimized with THD+N reaching -121 dB at 1 kHz with a 2 V rms output into a 32 Ω load. Noise performance features an A-weighted output noise of 1.8 μV rms across the 10 Hz to 22 kHz band.

Feature Summary

• Flexible architecture supporting direct interface with digital-to-analog converters via differential current or voltage inputs.
• Integrated common-mode control loop that maintains fixed input levels for optimal DAC operation and low noise.
• Dual shutdown pins enabling independent control of the input stage and output buffer for power management.
• Pop and click noise suppression mechanisms integrated within the signal chain.

Applications

• High fidelity headphone drivers
• Mobile phones
• Bluetooth speakers and headphones
• Gaming notebooks and tablets

Procurement Notes

Verify the specific ordering suffix RL against the manufacturer's official documentation to confirm reel packaging specifications. Ensure compatibility with the required LFCSP-24 footprint and thermal pad connection requirements during procurement planning. Cross-reference the component revision history to validate the manufacturing date code and ensure it meets project lifecycle requirements.

Selection Notes

Select this component when designing systems requiring high dynamic range and low distortion for portable audio applications. The integrated solution reduces external component count compared to discrete implementations. Consider the ±3.3 V to ±6 V operating range and the specific shutdown pin configurations for power management strategies in battery-operated devices.

Part Context

This part belongs to the SSM6322 series of integrated stereo audio amplifiers manufactured by Analog Devices Inc. It utilizes a proprietary XFCB process technology designed for exceptionally low 1/f noise and high load drive capabilities. The device combines a difference amplifier configuration with a common-mode loop to maximize audio fidelity while minimizing power dissipation.

Replacement Considerations

Consult the official datasheet ordering guide for confirmed substitute part numbers. Verify pinout compatibility and electrical specifications before substituting any alternative components.

FAQ

How does the SSM6322 handle common-mode signals from the DAC?

The device features an internal common-mode loop that sets the input terminals to a DC voltage defined by the REF pins, ensuring the DAC source resistors have equal voltage drops for optimal distortion performance.

What is the function of the SD and SD2 pins?

SD controls the output buffer shutdown while keeping the input stage active, whereas SD2 shuts down the entire device, reducing quiescent current to approximately 15 μA.