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.

• 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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• Gain range (dB)
• 0dB, and 10dB to 65dB in 1dB steps
• Input voltage noise (Typ) (nV/rtHz)
• 1.2
• Power supply (Typ) (V)
• ±5
• Iq (Typ) (mA)
• 30
• Interface type
• Digital SPI
• Operating temperature range (C)
• -40 to 85
• Rating
• Catalog

PGA2500的完整型号有：PGA2500IDB、PGA2500IDBR，以下是这些产品的关键参数及官网采购报价：

PGA2500IDB，工作温度：-40 to 85，封装：SSOP (DB)-28，包装数量MPQ：50个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网PGA2500IDB的批量USD价格：8.395（1000+）

PGA2500IDBR，工作温度：-40 to 85，封装：SSOP (DB)-28，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网PGA2500IDBR的批量USD价格：6.996（1000+）

PGA2500EVM — PGA2500 评估模块

The PGA2500EVM provides a convenient platform for evaluating the performance and features of the PGA2500 product. Data output ports can be used to daisy-chain multiple PGA2500EVM circuit boards. The EVM requires the use of three power supplies, +/-5 analog supply and a +5 digital supply.

PGA2500EVMV2 — PGA2500 评估模块版本 2

PGA2500EVMV2 评估模块 (EVM) 是一个用于评估 PGA2500 产品性能和特性的便捷平台。可编程增益放大器可编程为在单位增益下传递信号，或对输入信号应用 10dB 至 65dB 的增益。增益和支持功能可通过 MSP430F5529 微控制器和 PGA2500EVMV2 图形用户界面 (GUI) 进行控制。

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