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