PGA2505 - 增益范围：0dB 和 9dB 至 60dB，3dB 步进

PGA2505是TI德州仪器公司的一款无产品，PGA2505是增益范围：0dB 和 9dB 至 60dB，3dB 步进，本站介绍了PGA2505的封装应用图解、特点和优点、功能等，并给出了与PGA2505相关的TI元器件型号供参考。

PGA2505 - 增益范围：0dB 和 9dB 至 60dB，3dB 步进 - 无 - 麦克风前置放大器 - 德州仪器

产品描述

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.

产品特性

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

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