GENERAL DESCRIPTION
The AD7822, AD7825, and 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, and AD7829 contain an on-chip reference of 2.5 V (2% tolerance), a track/hold amplifier, a 420 ns 8-bit half-flash 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
    1, 4 and 8 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
        Stand-Alone Operation
   
APPLICATIONS
    Data Acquisition Systems, DSP Front Ends
    Disk Drives
    Mobile Communication Systems, Subsampling
        Applications