SSM2932

Obsolete

High Efficiency, Ground-Referenced Class-G Headphone Amplifier

Data Sheet (Rev. 0) Product Selection Table

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Overview

Ground-referenced Class-G output stage
Very high efficiency for portable applications
1.7 mA typical quiescent current
50 mW per channel into
16Ω load (with 3.3V supply)
98 dB signal-to-noise
(A-weighted)
85 dB power supply rejection ratio at 217 Hz

2.5V to 3.6V supply range
Selectable gain: 0 dB or 6 dB
High-Z output mode for sharing of output jack
1μA shutdown current
Short-circuit protection
See datasheet for additional features

The SSM2932 is a stereo headphone amplifier capable of delivering 50 mW of continuous output power per channel into 16 Ω single-ended loads at the 1% THD + N threshold. The stereo headphone drivers are high efficiency, true ground-referenced Class-G technology.

The SSM2932 incorporates a gain control pin that selects a gain of 0 dB or 6 dB. The ground-referenced output scheme eliminates the need for large dc blocking capacitors, reducing system cost and board area. The Class-G amplifier is fine-tuned to maximize battery life, a critical task in portable applications. The device maximizes battery life by modulating the amplifier power supply rail to match the output demand without consuming excessive supply current, thus reducing power dissipation during typical audio playback.

The SSM2932 is specified over the industrial temperature range of −40°C to +85°C. It has output short-circuit protection as well as ESD protection to 8 kV (human body model). The SSM2932 is available in a 16-ball, 1.64 mm × 1.64 mm wafer level chip scale package (WLCSP).

APPLICATIONS