Linear LTC2185双路16位125Msps模数转换方案
Linear 公司的LTC2185是双路16位125Msps低功耗模数转换器(ADC),两路可同时取样, 76.8dB SNR, 90dB SFDR,单电源1.8V工作,每路功耗185mW/154mW/100mW, CMOS, DDR CMOS或DDR LVDS输出,输入范围1VP-P到 2VP-P,550MHz满功率带宽S/H,主要用在通信, 蜂窝基站,SDR,手提医疗图像,多路数据采集以及非破坏测试.本文介绍了LTC2185主要特性, 方框图,多种模拟输入和前端电路,以及典型应用电路和PCB布局图.
LTC2185 - 16-Bit, 125Msps Low Power Dual ADCs
The LTC.2185/LTC2184/LTC2183 are two-channel simultaneous sampling 16-bit A/D converters designed for digitizing high frequency, wide dynamic range signals.
They are perfect for demanding communications applications with AC performance that includes 76.8dB SNR and 90dB spurious free dynamic range (SFDR). Ultralow jitter of 0.07psRMS allows undersampling of IF frequencies with excellent noise performance. DC specs include ±2LSB INL (typ), ±0.5LSB DNL (typ) and no missing codes over temperature. The transition noise is 3.4LSBRMS.
The digital outputs can be either full rate CMOS, Double Data Rate CMOS, or Double Data Rate LVDS. A separate output power supply allows the CMOS output swing to range from 1.2V to 1.8V.
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