Linear Technology/Analog Devices’ LTC2348 are 16-bit and 18-bit, low noise 8-channel simultaneous sampling successive approximation register (SAR) ADCs. These ADCs operate from a 5 V low voltage supply, flexible high voltage supplies, and using the internal reference and buffer, each channel of these SoftSpan™ ADCs 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. Individual channels may also be disabled to increase throughput on the remaining channels.

The wide input common mode range and 118 dB CMRR of the LTC2348-16 and LTC2348-18 analog inputs allow the ADCs to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±1 LSB INL, no missing codes at 16-bits, and 94.4 dB SNR (LTC2348-16) and ±3 LSB INL, no missing codes at 18-bits, and 96.7 dB SNR (LTC2348-18), make the LTC2348-16 and LTC2348-18 ideal choices for many high voltage applications requiring wide dynamic range.

The LTC2348 ADCs support pin-selectable SPI CMOS (1.8 V to 5 V) and LVDS serial interfaces. Between one and eight lanes of data output may be employed in CMOS mode, allowing the user to optimize bus width and throughput. The LTC2348 ADCs are perfect for power line monitory, process control, and programmable logic controllers.