Linear 公司的LTC2259-16是 16位模-数转换器,适用于对高频宽动态范围的信号举行数字化.它的SNR为73.1dB,SFDR为88dB,单电源1.8V工作,功率89mW,具有CMOS, DDR CMOS 或DDR LVDS输出,可选择的输入范围从1VP-P 到 2VP-P,主要用于通信,蜂窝基站,SDR,手提医疗图像设备,多路数据收罗和非破坏性测试.本文先容了LTCR2259-16主要特点, 功能方框架图, 接纳变压器模拟输入(5MHz-70MHz)电路图,以及70MHz到170MHz, 170MHz到270MHz, 大于270MHz和接纳高速差分放大器的前端输入电路图, LTC2259-16典范应用电路图. The LTCR2259-16 is a sampling 16-bit A/D converter designed for digitizing high frequency, wide dynamic range signals. It is perfect for demanding communications applications with AC performance that includes 73.1dB SNR and 88dB spurious free dynamic range (SFDR). Ultralow jitter of 0.17psRMS allows undersampling of IF frequencies with excellent noise performance. DC specs include ±4LSB INL (typical) and ±0.5LSB DNL (typical). The digital outputs can be either full-rate CMOS, doubledata 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. The ENC+ and ENCC inputs may be driven differentially or single ended with a sine wave, PECL, LVDS, TTL or CMOS inputs. An optional clock duty cycle stabilizer allows high performance at full speed for a wide range of clock duty cycles. LTCR2259-16主要特点: 73.1dB SNR 88dB SFDR Low Power: 89mW Single 1.8V Supply CMOS, DDR CMOS or DDR LVDS Outputs Selectable Input Ranges: 1VP-P to 2VP-P 800MHz Full-Power Bandwidth S/H Optional Data Output Randomizer Optional Clock Duty Cycle Stabilizer Shutdown and Nap Modes Serial SPI Port for Configuration 40-Pin (6mm x 6mm) QFN Package LTCR2259-16应用: Communications Cellular Base Stations Software Defi ned Radios Portable Medical Imaging Multi-Channel Data Acquisition Nondestructive Testing
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