ADI LTC2345CUK-18#TRPBF

The LTC2345-18 is an 18-bit, low noise 8-channel simultaneous sampling successive approximation register (SAR) ADC with differential, wide common mode range inputs. Operating from a 5V low voltage supply and using the internal reference and buffer, each channel of this SoftSpan ADC can be independently configured on a conversion-by-conversion basis to accept ±4.096V, 0V to 4.096V, ±2.048V, or 0V to 2.048V signals. Individual channels may also be disabled to increase throughput on the remaining channels. The wide input common mode range and 102dB CMRR of the LTC2345-18 analog inputs allow the ADC to directly digitize a variety of signals, simplifying signal chain design. This input signal flexibility, combined with ±5LSB INL, no missing codes at 18 bits, and 91.8dB SNR, makes the LTC2345-18 an ideal choice for many applications requiring wide dynamic range. The LTC2345-18 supports pin-selectable SPI CMOS (1.8V to 5V) 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.

• 200ksps per Channel Throughput
• Eight Simultaneous Sampling Channels
• ±5LSB INL (Maximum, ±4.096V Range)
• Guaranteed 18-Bit, No Missing Codes
• Differential, Wide Common Mode Range Inputs
• Per-Channel SoftSpan Input Ranges: ±4.096V, 0V to 4.096V, ±2.048V, 0V to 2.048V, ±5V, 0V to 5V, ±2.5V, 0V to 2.5V
• 91.8dB Single-Conversion SNR (Typical)
• −113dB THD (Typical) at fIN = 2kHz
• 102dB CMRR (Typical) at fIN = 200Hz
• Rail-to-Rail Input Overdrive Tolerance
• Guaranteed Operation to 125℃
• Integrated Reference and Buffer (4.096V)
• SPI CMOS (1.8V to 5V) and LVDS Serial I/O
• Internal Conversion Clock, No Cycle Latency
• 81mW Power Dissipation (Typical)
• 48-Lead (7mm x 7mm) QFN Package

• Programmable Logic Controllers
• Industrial Process Control
• Medical Imaging
• High Speed Data Acquisition