GENERAL DESCRIPTION
The AD7822/AD7825/AD7829 are high speed, 1-, 4-, and 8-channel, microprocessor-compatible, 8-bit analog-to-digital converters with a maximum throughput of 2 MSPS. The AD7822/AD7825/AD7829 contain an on-chip reference of 2.5 V (2% tolerance); a track-and-hold amplifier; a 420 ns, 8-bit halfflash ADC; and a high speed parallel interface. The converters can operate from a single 3 V ± 10% and 5 V ± 10% supply.
   
FEATURES
    8-bit half-flash ADC with 420 ns conversion time
    One, four, and eight single-ended analog input channels
        Available with input offset adjust
    On-chip track-and-hold
    SNR performance given for input frequencies up to 10 MHz
    On-chip reference (2.5 V)
    Automatic power-down at the end of conversion
    Wide operating supply range
        3 V ± 10% and 5 V ± 10%
    Input ranges
        0 V to 2 V p-p, VDD = 3 V ± 10%
        0 V to 2.5 V p-p, VDD = 5 V ± 10%
    Flexible parallel interface with EOC pulse to allow
        standalone operation
   
APPLICATIONS
    Data acquisition systems, DSP front ends
    Disk drives
    Mobile communication systems, subsampling
        applications