GENERAL DESCRIPTION

The AD7890 is an eight-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 max)
Power-Down Mode (75 μW typ)