The MAX97001 mono 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 4 inputs are configurable as 2 differential inputs or 4 single-ended inputs.
The entire subsystem is designed for maximum efficiency. The high-efficiency, 700mW, 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-level signals without compromising the quality of large signals.
All control is performed using the 2-wire I2C interface. The MAX97001 operates over the extended -40℃ to +85℃ temperature range, and is available in the 2mm x 2.5mm, 20-bump, WLP package (0.5mm pitch).
The MAX97001 evaluation kit (EV kit) is a fully assembled and tested PCB that evaluates the MAX97001 mono Class D audio power amplifier and stereo Class H DirectDriveM headphone amplifier communicating over a 2-wire I2C interface. The EV kit features an on-board microcontroller for communicating with the I2C interface of the MAX97001. PCB pads are provided for accessing the analog inputs and amplifier outputs.
The MAX97001 EV kit requires a 2.7V to 5.5V supply for PVDD and a 1.8V supply for VDD.
WindowsM 2000-, Windows XPM-, and Windows VistaMcompatible software is provided to facilitate configuration.
The software controls an on-board microcontroller over USB, which generates I2C commands.
MAX97001评估板:
Proven Audio PCB Layout
On-Board USB Interface Circuit Generates I2CCompatible Signals
PCB Pads for User-Supplied I2C-Compatible Signals
Surface-Mount Components
Windows 2000-, Windows XP-, and Windows Vista (32-Bit)-Compatible Software
