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LTC2345-18 Datasheet Differential SoftSpan ADC

Manufacturer: Linear Technology (now Analog Devices)

General Description

nn 200ksps per Channel Throughput nn Eight Simultaneous Sampling Channels nn ±5LSB INL (Maximum, ±4.096V Range) nn Guaranteed 18-Bit, No Missing Codes nn Differential, Wide Common Mode Range Inputs nn 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 nn 91.8dB Single-Conversion SNR (Typical) nn −113dB THD (Typical) at fIN = 2kHz nn 102dB CMRR (Typical) at fIN = 200Hz nn Rail-to-Rail Input Overdrive Tolerance nn Guaranteed Operation to 125°C nn Integrated Reference and Buffer (4.096V) nn SPI CMOS (1.8V to 5V) and LVDS Serial I/O nn Internal Conversion Clock, No Cycle Latency nn 81mW Power Dissipation (Typical) nn 48-Lead (7mm x 7mm) QFN Package Applications nn Programmable Logic Controllers nn Industrial Process Control nn Medical Imaging nn High Speed Data Acquisition The LTC®2345-18 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 SoftSpanTM ADC can be independently configured on a conversion-by-conversion basis to accept ±4.096, 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.

Key Features

  • LTC2345-18 Octal, 18-Bit, 200ksps Differential SoftSpan ADC with Wide Input Common Mode Range.