数字可编程增益控制器ICTHAT5173集成电路
FEATURES
Ideal mate for THAT 1580 and 1583 preamplifiers
Wide gain range: 0 to 60 dB in 3 dB steps
Wide supply range: ±5V to ±17V
Wide output swing: +27dBu (±17V sup.)
Wide input swing: +27dBu (±17V sup.)
Low THD+N: < 0.001% @ 1 kHz; Up to 42 dB gain
Integrated differential servo minimizes output offset
Zero-crossing detector minimizes switching noise
Daisy Chainable SPI interface
Four general-purpose digital outputs
Small 5mm x 5mm QFN24 package
特征
对于1580和1583前置放大器的理想伴侣
广泛的增益范围：0至60分贝在3分贝的步骤
宽电源范围：±5V至±17v
宽输出摆幅：+ 27dbu（±17v增刊）
宽输入摆幅：+ 27dbu（±17v增刊）
低THD：0.001% @ 1千赫；高达42分贝增益
集成差分伺服最小化输出失调
过零检测器最小化开关噪声
Daisy Chainable SPI接口
四通用数字输出
小5mm x 5mm qfn24包
APPLICATIONS
Digitally controlled microphone preamplifiers
Digitally-controlled instrumentation amplifiers
Digitally-controlled differential amplifiers
Audio mixing consoles
PC audio breakout boxes
Audio distribution systems
Digital audio snakes
Portable audio recorders
应用
数字控制的麦克风前置放大器
数字控制仪表放大器
数字控制差分放大器
调音台
电脑音频破解盒
音频分配系统
数字音频的蛇
便携式录音机
DESCRIPTION
The THAT5173 is a digital gain controller for low-noise, analog, differential, current-feedback audio preamplifiers such as the THAT 1580, and 1583. When used in conjunction with an appropriate analog gain block, the 5173 supports digitally control gain from 0dB to 60dB in 3dB steps, while preserving low noise and distortion. It operates from ±5V to ±17V analog supplies, supporting input signal levels as high as +27 dBu (at 0dB gain and ±17V supplies) in combination with the 1580 -- without an input pad. The 5173 includes a differential servo and zero-crossing detector to minimize dc offsets and glitches (zipper noise) during gain adjustments.
The 5173 is controlled via an industry standard serial-peripheral interface (SPI) port. Four General Purpose Outputs (GPOs) can be controlled via this interface. The GPOs may be used to control auxillary functions such as input selectors, filters, mutes, LEDs, relays, etc.
The 5173 was designed to mate perfectly with the THAT 1580 or 1583 Differential Audio Preamplifier ICs. Together, the 1580/5173 or 1583/5173 combination provides a high performance solution for digitally-controllable audio preamplifier applications. However, the 5173 may also be used to control a discrete preamplifier.
描述
这个THAT5173数字增益控制的低噪声、模拟、微分、电流反馈音频前置放大器等，1580，和1583。当使用一个合适的模拟增益块连接，5173支持从0dB至在3dB以下步骤60dB增益数字控制，同时保持较低的噪声和失真。它的工作从±5V至±17V模拟用品，支持输入信号电平为+ 27 dBu的高（在0dB增益和±17v用品）与1580结合——没有输入垫。5173个包括差分伺服和过零检测器，以减少直流偏移和故障（拉链噪音）在增益调整。
5173是通过一个工业标准串行外设接口（SPI）端口控制的。四通用输出（GPO）可以通过该接口控制。该GPO可以用来控制辅助功能，如输入选择器、过滤器、静音、发光二极管、继电器等。
5173款的设计与1580或1583差分音频前置放大器完全配合。总之，1580/5173或1583/5173组合为数字可控音频前置放大器应用提供了高性能解决方案。然而，5173也可用于控制离散前置放大器。
