DESCRIPTION
The LTC®1857/LTC1858/LTC1859 are 8-channel, low power, 12-/14-/16-bit, 100ksps, analog-to-digital converters (ADCs). These SoftSpan™ ADCs can be softwareprogrammed for 0V to 5V, 0V to 10V, ±5V or ±10V input spans and operate from a single 5V supply. The 8-channel multiplexer can be programmed for single-ended inputs or pairs of differential inputs or combinations of both. In addition, all channels are fault protected to ±25V. A fault condition on any channel will not affect the conversion result of the selected channel.

FEATURES
■ Sample Rate: 100ksps
■ 8-Channel Multiplexer with ±25V Protection
■ Single 5V Supply
■ Software-Programmable Input Ranges:
   ■ 0V to 5V, 0V to 10V, ±5V or ±10V
   ■ Single-Ended or Differential
■ ±3LSB INL for the LTC1859, ±1.5LSB INL for the LTC1858, ±1LSB INL for the LTC1857
■ Power Dissipation: 40mW (Typ)
■ SPI/MICROWIRE™ Compatible Serial I/O
■ Power Shutdown: Nap and Sleep
■ Signal-to-Noise Ratio: 87dB (Typ) for the LTC1859
■ Operates with Internal or External Reference
■ Internal Synchronized Clock
■ 28-Pin SSOP Package

APPLICATIONS
■ Industrial Process Control
■ Multiplexed Data Acquisition Systems
■ High Speed Data Acquisition for PCs
■ Digital Signal Processing