PGA2500
- Fully Differential Input-to-Output Architecture
- Digitally Controlled Gain Using Serial Port Interface:
- Gain Range: 10dB through 65dB, 1dB per step
- Unity (0dB) Gain Setting via Serial Port or Dedicated Control Pin
- Dynamic Performance:
- Equivalent Noise with ZS = 150
and Gain = 30dB: –128dBu - Total Harmonic Distortion plus Noise (THD+N) with Gain = 30dB: 0.0004%
- Equivalent Noise with ZS = 150
- Zero Crossing Detection Minimizes Audible Artifacts when Gain Switching
- Integrated DC Servo Minimizes Output Offset Voltage
- Common-Mode Servo Improves CMRR
- Four-Wire Serial Control Port Interface:
- Simple Interface to Microprocessor or DSP Serial Ports
- Supports Daisy-Chaining of Multiple PGA2500 Devices
- Dedicated Input Pin for Selecting Unity Gain
- Overload Output Pin Provides Clipping Indication
- Four General-Purpose Digital Output Pins
- Requires ±5V Power Supplies
- Available in an SSOP-28 Package
- APPLICATIONS
- Microphone Preamplifiers and Mixers
- Digital Mixers and Recorders
All trademarks are the property of their respective owners.
The PGA2500 is a digitally controlled, analog microphone preamplifier designed for use as a front end for highperformance audio analog-to-digital (A/D) converters. The PGA2500 features include low noise, wide dynamic range, and a differential signal path. An on-chip DC servo loop is employed to minimize DC offset, while a common-mode servo function may be used to enhance common-mode rejection.
The PGA2500 features a gain range of 10dB through 65dB (1dB/step), along with a unity gain setting. The wide gain range allows the PGA2500 to be used with a variety of microphones. Gain settings and internal functions are programmed using a 16-bit control word, which is loaded using a simple serial port interface. A serial data output pin provides support for daisy-chained connection of multiple PGA2500 devices. Four programmable digital outputs are provided for controlling the external switching of input pads, phantom power, high pass filters, and polarity reversal functions. The PGA2500 requires both +5V and –5V power supplies and is available in a small SSOP-28 package.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | PGA2500: Digitally Controlled Microphone Preamplifier 数据表 (Rev. A) | 2003-12-4 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
PGA2500EVM — PGA2500 评估模块
PGA2500EVM 是一个用于评估 PGA2500 产品性能和特性的便捷平台。数据输出端口可以用于以菊花链形式连接多个 PGA2500EVM 电路板。EVM 需要使用三个电源：+/–5 模拟电源及 +5 数字电源。
PGA2500EVMV2 — PGA2500 评估模块版本 2
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| SSOP (DB) | 28 | Ultra Librarian |
订购和质量
推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。