LTC2157-14

FEATURES n 70dB SNR n 90dB SFDR n Low Power: 650mW/616mW/567mW Total n Single 1.8V Supply n DDR LVDS Outputs n Easy-to-Drive 1.5VP-P Input Range n 1.25GHz Full Power Bandwidth S/H n Optional Clock Duty Cycle Stabilizer n Low Power Sleep and Nap Modes n Serial SPI Port for Configuration n Pin-Compatible 12-Bit Versions n 64-Pin (9mm × 9mm) QFN Package APPLICATIONS n Communications n Cellular Basestations n Software Defined Radios n Medical Imaging n High Definition Video n Testing and Measurement Instruments LTC2157-14/ LTC2156-14/LTC2155-14 Dual 14-Bit 250Msps/ 210Msps/170Msps ADCs DESCRIPTION The LTC®2157-14/LTC2156-14/LTC2155-14 are 2-channel simultaneous sampling 250Msps/210Msps/170Msps 14-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 70dB SNR and 90dB spurious free dynamic range (SFDR). The 1.25GHz input bandwidth allows the ADC to undersample high frequencies with good performance. The latency is only six clock cycles. DC specs include ±0.85LSB INL (typ), ±0.25LSB DNL (typ) and no missing codes over temperature. The transition noise is 1.82LSBRMS. The digital outputs are double data rate (DDR) LVDS. The ENC+ and ENC– inputs can be driven differentially 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. L, L...