The PGA2505 is a digitally-controlled, analog microphone preamplifier designed for use as a front-end for high-performance audio analog-to-digital converters (ADCs). The PGA2505 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 PGA2505 features a gain range of 9dB through 60dB (3dB/step), along with a unity gain setting. The wide gain range allows the PGA2505 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 PGA2505 devices. Four programmable digital outputs are provided for controlling the external switching of input pads, phantom power, and high-pass filters. The PGA2505 requires both +5V and -5V power supplies and is available in a small SSOP-24 package.

• FULLY DIFFERENTIAL lNPUT-TO-OUTPUT ARCHITECTURE
• DIGITALLY-CONTROLLED GAIN USING SPI:
  • Gain Range: 9dB through 60dB, 3dB per Step
  • Unity (0dB) Gain Setting via Serial Port
• DYNAMIC PERFORMANCE:
  • Equivalent Input Noise with ZS = 150 and Gain = 30dB: -123dBu
  • Total Harmonic Distortion plus Noise (THD+N) with Gain = 30dB: 0.0006%
• 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 PGA2505 Devices
• OVER-RANGE OUTPUT PIN PROVIDES CLIPPING INDICATION
• FOUR GENERAL-PURPOSE DIGITAL OUTPUT PINS
• ±5V POWER SUPPLIES
• AVAILABLE IN AN SSOP-24 PACKAGE
• APPLICATIONS
  • MICROPHONE PREAMPLIFIERS AND MIXERS
  • DIGITAL MIXERS AND RECORDERS
  • DIGITAL AUDIO EDITING SYSTEMS
  • BROADCAST EQUIPMENT
  • INTERCOMS

All trademarks are the property of their respective owners.

• Gain range (dB)
• 9dB through 60dB, in 3dB steps
• Input voltage noise (Typ) (nV/rtHz)
• 3
• Power supply (Typ) (V)
• ±5
• Iq (Typ) (mA)
• 30
• Interface type
• Digital SPI
• Operating temperature range (C)
• -40 to 85
• Rating
• Catalog

PGA2505的完整型号有：PGA2505IDB、PGA2505IDBR，以下是这些产品的关键参数及官网采购报价：

PGA2505IDB，工作温度：-40 to 85，封装：SSOP (DB)-24，包装数量MPQ：60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PGA2505IDB的批量USD价格：5.227（1000+）

PGA2505IDBR，工作温度：-40 to 85，封装：SSOP (DB)-24，包装数量MPQ：2000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PGA2505IDBR的批量USD价格：4.356（1000+）

PGA2505EVM PGA2505 评估模块

PGA2505EVM 是一个方便快捷的平台，用于评估 PGA2505 的性能和特性。PGA2505 是一款数字控制的麦克风前置放大器，专用于放大动态和电容式麦克风的输出以及驱动高性能音频模数 (A/D) 转换器。

PGA2505EVMV2 适用于 PGA2505 具有 USB 接口的数字控制麦克风前置放大器的评估模块

PGA2505EVMV2 评估模块 (EVM) 是一个用于评估 PGA2505 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 9dB 至 60dB（3dB 步长）的增益。增益和支持功能可通过 MSP430F5529 微控制器和 PGA2505EVMV2 图形用户界面 (GUI) 进行控制。

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