Audio Subsystem with Mono Class D Speaker and Class H Headphone Amplifier

Industry's Smallest 2mm x 2mm 25-Bump WLP Audio Subsystem with Limiter, Best Class D and H Class Headphone Amplifier


The MAX97000 audio subsystem combines a mono speaker amplifier with a stereo headphone amplifier and an analog DPST switch. The headphone and speaker amplifiers have independent volume control and on/off control. The four inputs are configurable as two differential inputs or four single-ended inputs.

The entire subsystem is designed for maximum efficiency. The high-efficiency 725mW Class D speaker amplifier operates directly from the battery and consumes no more than 1µA in shutdown mode. The Class H headphone amplifier utilizes a dual-mode charge pump to maximize efficiency while outputting a ground-referenced signal that does not require output coupling capacitors.

The speaker amplifier incorporates a distortion limiter to automatically reduce the volume level when excessive clipping occurs. This allows high gain for low-levels signals without compromising the quality of large signals.

All control is performed using the 2-wire, I²C interface. The MAX97000 operate in the extended -40°C to +85°C temperature range, and is available in the 2mm x 2mm, 25-bump WLP package (0.4mm pitch).
MAX97000: Simplified Block Diagram MAX97000: Simplified Block Diagram Enlarge+

Key Features

  • 1.6V to 2.0V Headphone Supply Voltage
  • 2.7V to 5.5V Speaker Supply Voltage
  • Internal LDO Allows Single-Supply Operation
  • 725mW Speaker Output (VPVDD = 3.7V, ZSPK = 8Ω + 68µH)
  • 40mW/Channel Headphone Output (RHP = 16Ω)
  • Low-Emission Class D Amplifier
  • Efficient Class H Headphone Amplifier
  • Ground-Referenced Headphone Outputs
  • Two Stereo Single-Ended/Mono Differential Inputs
  • Integrated Distortion Limiter (Speaker Outputs)
  • Integrated DPST Analog Switch
  • No Clicks and Pops
  • TDMA Noise Free
  • 2mm x 2mm, 25-Bump 0.4mm Pitch WLP Package


  • Cell Phones
  • Portable Multimedia Players
Part Number Functions Class Spkr. Amp. VCC
Spkr. Amp. VCC
Spkr. Amp. ICC
Spkr. Amp. POUT
Spkr. Amp. Half Pwr. THD+N
Hdph. Amp. POUT into 32Ω
Hdph. Amp. Half Pwr. THD+N
Package/Pins Budgetary
min max typ @ 1% THD+N See Notes
Mobile Communication Subsystem
Netbook Subsystem
D 2.7 5.5 1.38 0.93 0.05 0.035 0.02
$0.75 @1k
See All Integrated Amplifiers (8)
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.

MAX97000EVKIT: Evaluation Kit for the MAX97000

Quality and Environmental Data

Request Reliability Report for: MAX97000 
Lead-Free Package Tin (Sn) Whisker Reports

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