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MAX98309, MAX98310

Mono 1.4W Class AB Audio Amplifiers

Delivers Low Quiescent Current and Excellent SNR
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Status Explanations for product status codes

Active: In Production.


The MAX98309/MAX98310 mono 1.4W Class AB audio amplifiers offer low quiescent current while maintaining excellent SNR and low 0.008% THD+N. These ICs feature excellent 90dB PSRR and state of the art click-and-pop suppression.

The ICs are offered with an internally fixed 0dB, 3dB, 6dB, and 9dB gain (MAX98310) or an externally set gain (MAX98309) through external resistors.

The MAX98309 feature a 10ms or 100ms pin-selectable turn-on time, while the MAX98310 has a preset 5ms turn-on time.

The MAX98309/MAX98310 are available in a (1.0mm x 1.0mm) 9-bump, 0.3mm pitch WLP, and are specified over the extended -40°C to +85°C temperature range.

Data Sheet

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An evaluation board is available: MAX98309EVKIT

Key Features

  • Enhances System Performance
    • Differential Input Improves Noise Immunity
    • Industry-Leading Click-and-Pop Suppression
    • High 90dB PSRR (fIN = 217Hz)
  • Smaller Solution Size
    • 1mm x 1mm WLP Footprint
  • Extends Battery Life
    • Low Quiescent Current
  • Delivers Robust System Design
    • Thermal Overload Protection
    • Short-Circuit Protection
  • 1.2mA Supply Current (VDD = 3.7V)
  • 750mW into 8Ω (VDD = 3.7V)
  • 2.5V to 5.5V Supply Operation
  • Pin-Selectable, Internally-Fixed Gain (MAX98310)
  • 1.8V Logic-Compatible Active-Low SHDN Input


  • Cell Phones/Smartphones
  • Digital Cameras
  • e-Readers
  • GPS
  • Portable Media Players
  • Tablets

Key Specifications:

Speaker Amplifiers
Part Number Class Spkr. Amp. VCC
Spkr. Amp. VCC
Spkr. Amp. ICC
POUT into 4Ω @ 1% THD+N
POUT into 4Ω @ 10% THD+N
POUT into 8Ω @ 1% THD+N
POUT into 8Ω @ 10% THD+N
Spkr. Amp. Half Pwr. THD+N
min max typ min min min min A- Weighted min See Notes
MAX98309  AB 2.5 5.5 1.2 2.1 2.7 1.4 1.7 0.01 110 93 $0.34 @1k
See All Speaker Amplifiers (37)

Pricing Notes:

This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX98309, MAX98310: Simplified Block Diagram
Simplified Block Diagram

More Information

Topmark Coding MAX98309
Topmark Coding MAX98310

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Document Ref.: 19-5912 Rev 0; 2011-07-14
This page last modified: 2011-07-14