LTC2353 Dual 18-Bit 550 ksps/Channel SAR Analog-to-Digital Converters (ADCs)

Analog Devices LTC2353 is an 18-bit, low-noise, 2-channel simultaneous sampling successive approximation register (SAR) ADC with buffered differential, wide common mode range picoamp inputs. These ADCs operate from a 5 V low voltage supply, flexible high voltage supplies, and, using the internal reference and buffer, both channels can be independently configured on a conversion-by-conversion basis to accept ±10.24 V, 0 V to 10.24 V, ±5.12 V, or 0 V to 5.12 V signals. The integrated picoamp-input analog buffers, wide input common mode range, and 124 dB CMRR of the LTC2353 allows the ADC to directly digitize a variety of signals using minimal board space and power. The ADC supports pin-selectable SPI CMOS (1.8 V to 5 V) and LVDS serial interfaces. Either one or two lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput. This input signal flexibility, combined with ±3.5 LSB INL, no missing codes at 18-bits, and 96.4 dB SNR, make the LTC2353 an ideal choice for many high voltage applications requiring wide dynamic range, such as power line monitoring and test and measurement.