SSM2932ACBZ-R7

Overview

The SSM2932ACBZ-R7 is a stereo headphone amplifier utilizing ground-referenced Class-G technology. It operates on a single supply voltage ranging from 2.5 V to 3.6 V and delivers up to 85 mW per channel into a 16 Ω load at 1% THD+N. The device features a selectable gain of 0 dB or 6 dB, a typical quiescent current of 1.7 mA, and a shutdown current of 1 μA. It provides a signal-to-noise ratio of 98 dB (A-weighted) and includes built-in short-circuit protection, pop-and-click reduction, and 8 kV ESD protection. The component is housed in a 16-ball WLCSP package measuring 1.64 mm × 1.64 mm.

Feature Summary

• Ground-referenced Class-G output stage eliminates the need for large DC blocking capacitors.
• High efficiency design with adjustable gain selection via a digital control pin.
• Integrated charge pump generates internal power rails to maximize battery life.
• Built-in protection mechanisms include short-circuit limiting and thermal management.

Applications

• Cell phones
• Smartphones and multimedia phones
• Portable media players
• Digital cameras

Procurement Notes

Verify the obsolete status of this component before procurement planning. Confirm that the CB-16-11 package option remains available through authorized channels. Ensure compatibility with existing PCB footprints designed for the 16-ball WLCSP format. Review the datasheet revision history for any updates regarding electrical characteristics or recommended layout practices prior to finalizing orders.

Selection Notes

Select this amplifier for portable audio applications requiring high efficiency and minimal external components. The ground-referenced architecture simplifies board design by removing coupling capacitors. Consider the 0 dB or 6 dB gain options based on input signal levels. Verify that the load impedance meets the minimum requirement of 16 Ω for optimal performance and stability within the specified temperature range.

Part Context

This component belongs to Analog Devices' portfolio of high-efficiency audio amplifiers designed for mobile devices. It utilizes Class-G modulation to adjust internal supply rails according to signal demand, thereby reducing power dissipation. The device integrates a charge pump to create virtual negative and positive rails from a single supply, enabling true ground-referenced operation without external bulky capacitors.

Replacement Considerations

The datasheet identifies the SSM2932ACBZ-RL as an alternative ordering suffix for the same functional device and package type. No other cross-model substitutes are documented in the official specifications.

FAQ

How is the amplifier gain configured?

The gain is set to either 0 dB or 6 dB by applying a logic low (≤0.5 V) or logic high (≥1.2 V) to the GAIN pin, respectively.

What is the purpose of the SGND pin?

The SGND pin senses the DC potential at the headphone jack. Connecting it directly to the jack's ground pin minimizes DC offset and reduces pop-and-click noises during startup and shutdown.

How does the device achieve high efficiency?

It uses Class-G technology where the internal charge pump adjusts the positive and negative supply rails (CPVDD and CPVSS) based on the output signal level, lowering power consumption during quiet passages.