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SSM2932:  High Efficiency, Ground-Referenced Class-G Headphone Amplifier

Product Details

Product Status:Recommended for New Designs

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).


  • Cellular phones
  • Smartphones / multimedia phones
  • Digital cameras
  • Portable media players
  • Phone accessories
  • PDAs


  • 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
  • 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

Functional Block Diagram for SSM2932

Evaluation Kits & Symbols & Footprints

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Price, packaging, availability

SSM2932 Model Options
Model Package Pins Temp.
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
SSM2932ACBZ-R7 Status: Production CHIPS W/SOLDER BUMPS/WLCSP 16 Comm. Reel, 3000 - $0.90 Y  Material Info PCN Purchase Sample
SSM2932ACBZ-RL Status: Production CHIPS W/SOLDER BUMPS/WLCSP 16 Comm. Reel, 10000 - $0.90 Y  Material Info PCN Purchase
Price Table Help

The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

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