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)