数字可编程增益控制器ic原装THAT5171集成电路

FEATURES
 Ideal mate for THAT1580 preamplifiers
Wide gain range:
 +5.6 dB
 +13.6 to +68.6 dB in 1 dB steps
Wide supply range: ±5V to ±17V
Wide output swing: +27dBu (±17V sup.)
Wide input swing: +22dBu (±17V sup.)
Low THD+N: 0.0003% @ 22dB gain
Integrated differential servo minimizes output offset
Zero-crossing detector minimizes switching noise
Flexible, addressable SPI interface
Four general-purpose digital outputs
Small 7mm x 7mm QFN32 package

特征
对理想伴侣的that1580前置放大器
宽增益范围：
5.6分贝
+ 13.6至68.6分贝在1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：+ 22dbu（±17v增刊）
低THD + N：0.0003% @ 22db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
灵活的可寻址SPI接口
四通用数字输出
小的7毫米x 7毫米qfn32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 THAT5171 is a digital gain controller for low-noise, analog, differential, current-feedback audio preamplifiers such as the THAT1580. When used in conjunction with an appropriate analog gain block, the 5171 can set gain to 5.6dB, or any gain from 13.6dB to 68.6dB in 1dB steps, while preserving low noise and distortion. It operates from ±5V to ±17V supplies, supporting input signal levels as high as +22 dBu (at 5.6dB gain, and ±17V supplies) in combination with the 1580 (without an external input pad). The 5171 includes a differential servo and zero-crossing detector to minimize dc offsets and glitches (zipper noise) during gain adjustments.

The 5171 is controlled via an addressable serial-peripheral interface (SPI) port. Four General Purpose Outputs (GPOs) can be controlled via this interface. The GPOs may be connected to input pads, analog switches, mute circuits, LEDs, etc. The SPI bus supports read-back so that host software can verify proper operation.

The 5171 was designed to mate perfectly with THAT1580 Differential Audio Preamplifier ICs. Together, these ICs provide a best-of-class solution for digitally-controllable audio preamplifier applications. However, for designers who prefer a more customized solution, the 5171 may also be used to control a discrete preamplifier

描述
这个THAT5171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如that1580。当使用一个合适的模拟增益块连接，5171可以获得5.6db，或增益从13.6db在1dB步长68.6db，同时保持较低的噪声和失真。它的工作从±5V至±17v物资，支持输入信号电平为+ 22 dBu的高（在5.6db增益，和±17v用品）与1580组合（无外部输入垫）。5171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。

5171是通过可寻址串行外设接口（SPI）端口控制的。四通用输出（GPO）可以通过该接口控制。该GPO可以连接到输入端，模拟开关，静音电路，发光二极管，等SPI总线支持回读这样的主机软件可以验证正确的操作。

5171是为了伴侣完美THAT1580微分音频前置放大器集成电路。这些集成电路为数字可控音频前置放大器提供了一流的解决方案。然而，对于喜欢定制的解决方案的设计者来说，5171也可以用来控制离散前置放大器