GENERAL DESCRIPTION

The AD7890 is an 8-channel 12-bit data acquisition system. The part contains an input multiplexer, an on-chip track/hold amplifier, a high speed 12-bit ADC, a 2.5 V reference, and a high speed, serial interface. The part operates from a single 5 V supply and accepts an analog input range of ±10 V (AD7890-10), 0 V to 4.096 V (AD7890-4), and 0 V to 2.5 V (AD7890-2).

FEATURES

Fast 12-bit ADC with 5.9 μs conversion time

Eight single-ended analog input channels

Selection of input ranges:

±10 V for AD7890-10

0 V to 4.096 V for AD7890-4

0 V to 2.5 V for AD7890-2

Allows separate access to multiplexer and ADC

On-chip track/hold amplifier

On-chip reference

High-speed, flexible, serial interface

Single supply, low-power operation (50 mW maximum)

Power-down mode (75 μW typ)