|
Maxim公司的MAX97001是单声道音频子系统,包罗单声道扬声器放大器,立体声耳机放大器和模拟DPST开关. 扬声器和立体声耳机放大器是单独音量控制,4个输入可配置成两个差分输入或4个单端输入.2.7V-5.5V扬声器电源,输出700mW,1.6V-2V耳机电源,每路输出37mW.主要用在手机和PMP.本京电港论坛文章先容MAX97001主要特点, 功能方框架图与应用框架图,MAX97001评估板主要特点,电路原理图纸和质料清单(BOM). 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). MAX97001主办要特点: 2.7V to 5.5V Speaker Supply Voltage 1.6V to 2V Headphone Supply Voltage 700mW Speaker Output (VPVDD = 3.7V, ZSPK = 8Ω + 68µH) 37mW/Channel Headphone Output (RHP = 16Ω) Low-Emission Class D Amplifier Efficient Class H Headphone Amplifier Ground-Referenced Headphone Outputs 2 Stereo Single-Ended/Mono Differential Inputs Integrated Distortion Limiter (Speaker Outputs) Integrated DPST Analog Switch No Clicks and Pops TDMA Noise Free 2mm x 2.5mm, 20-Bump, 0.5mm Pitch WLP Package MAX97001应用: Cell Phones Portable Multimedia Players
MAX97001评估板 The MAX97001 evaluation kit (EV kit) is a fully assembled and tested PCB线路板 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线路板 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线路板 Layout On-Board USB Interface Circuit Generates I2CCompatible Signals PCB线路板 Pads for User-Supplied I2C-Compatible Signals Surface-Mount Components Windows 2000-, Windows XP-, and Windows Vista (32-Bit)-Compatible Software Fully Assembled and Tested MAX97001评估板元件清单: |
热点图文