PGA2500 - 增益范围：0dB，10dB 至 65dB（1dB/步）

PGA2500是TI德州仪器公司的一款无产品，PGA2500是增益范围：0dB，10dB 至 65dB（1dB/步），本站介绍了PGA2500的封装应用图解、特点和优点、功能等，并给出了与PGA2500相关的TI元器件型号供参考。

PGA2500 - 增益范围：0dB，10dB 至 65dB（1dB/步） - 无 - 麦克风前置放大器 - 德州仪器

产品描述

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.

产品特性

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%
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

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