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