ADI LTC2353ILX-18#PBF

The LTC2353 - 18 is an 18 - bit, low noise 2 - channel simultaneous sampling successive approximation register (SAR) ADC with buffered differential, wide common mode range picoamp inputs. Operating from a 5V low voltage supply, flexible high voltage supplies, and using the internal reference and buffer, both channels of this SoftSpanTM ADC can be independently configured on a conversion - by - conversion basis to accept ±10.24V, 0V to 10.24V, ±5.12V, or 0V to 5.12V signals. One channel may also be disabled to increase throughput on the other channel. The integrated picoamp - input analog buffers, wide input common mode range and 124dB CMRR of the LTC2353 - 18 allow the ADC to directly digitize a variety of signals using minimal board space and power. This input signal flexibility, combined with ±3.5 LSB INL, no missing codes at 18 bits, and 96.4dB SNR, makes the LTC2353 - 18 an ideal choice for many high voltage applications requiring wide dynamic range.

• Simultaneous Sampling of 2 Buffered Channels
• 550ksps per Channel Throughput
• 500pA/12nA Max Input Leakage at 85°C/125°C
• ±3.5LSB INL (Maximum, ±10.24V Range)
• Guaranteed 18 - Bit, No Missing Codes
• Differential, Wide Common Mode Range Inputs
• Per - Channel SoftSpan Input Ranges: ±10.24V, 0V to 10.24V, ±5.12V, 0V to 5.12V, ±12.5V, 0V to 12.5V, ±6.25V, 0V to 6.25V
• 96.4dB Single - Conversion SNR (Typical)
• −110dB THD (Typical) at fIN = 2kHz
• 124dB CMRR (Typical) at fIN = 200Hz
• Rail - to - Rail Input Overdrive Tolerance
• Integrated Reference and Buffer (4.096V)
• SPI CMOS (1.8V to 5V) and LVDS Serial I/O
• Internal Conversion Clock, No Cycle Latency
• 162mW Power Dissipation (Typical)
• 48 - Lead (7mm x 7mm) LQFP Package

• Programmable Logic Controllers
• Industrial Process Control
• Power Line Monitoring
• Test and Measurement