TI ADS58C48四路200MSPS 11位模数转换方案

TI 公司的ADS58C48是四路取样频率高达200MSPS 的11位模数转换器（ADC），单电源1.8V工作，总功耗为0.9W。ADS58C48采用第三代SNRBoost3G技术，140MHz时的SFDR为82dBc，支持带宽高达60MHz，标准摆幅为350mV，主要用在各种通信设备包括遥控无线电，软件定义无线电（SDR），无线中继器以及MIMO和各种接收器。本文介绍了ADS58C48主要特性，方框图，模拟输入电路和多种驱动电路，以及ADS58C48EVM评估板主要特性，电路图和材料清单（BOM）。

The ADS58C48 is a quad channel 11-bit A/D converter with sampling rate up to 200 MSPS. It uses innovative design techniques to achieve high dynamic performance, while consuming extremely low power at 1.8V supply. This makes it well-suited for multi-carrier, wide band-width communications applications.

The ADS58C48 uses third-generation SNRBoost3G technology to overcome SNR limitation due to quantization noise (for bandwidths < Nyquist, Fs/2). Enhancements in the SNRBoost3G technology allow support for SNR improvements over wide bandwidths (up to 60 MHz). In addition, separate SNRBoost3G coefficients can be programmed for each channel.

The device has digital gain function that can be used to improve SFDR performance at lower full-scale input ranges.

ADS58C48主要特性：

Maximum Sample Rate: 200 MSPS

High Dynamic Performance

SFDR 82 dBc at 140 MHz
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