GENERAL DESCRIPTION
The AD7653 is a 16-bit, 1 MSPS, charge redistribution SAR analog-to-digital converter that operates from a single 5 V power supply. The part contains a high speed 16-bit sampling ADC, internal conversion clock, internal reference, error correction circuits, and both serial and parallel system interface ports. It features a very high sampling rate mode (Warp), a fast mode (Normal) for asynchronous conversion rate applications, and a reduced power mode (Impulse) for low power applications where power is scaled with the throughput. The AD7653 is fabricated using Analog Devices’ high performance, 0.6 micron CMOS process, with correspondingly low cost. It is available in a 48-lead LQFP and a tiny 48-lead LFCSP with operation specified from –40°C to +85°C.

FEATURES
   Throughput:
      1 MSPS (Warp mode)
      800 kSPS (Normal mode)
      666 kSPS (Impulse mode)
   16-bit resolution
   Analog input voltage range: 0 V to 2.5 V
   No pipeline delay
   Parallel and serial 5 V/3 V interface
   SPI®/QSPI™/MICROWIRE™/DSP compatible
   Single 5 V supply operation
   Power dissipation
      92 mW typ @ 666 kSPS, 138 μW @ 1 kSPS without REF
      128 mW typ @ 1 MSPS with REF
   48-lead LQFP and 48-lead LFCSP packages
   Pin-to-pin compatible with PulSAR ADCs
  
APPLICATIONS
   Data acquisition
   Instrumentation
   Digital signal processing
   Spectrum analysis
   Medical instruments
   Battery-powered systems
   Process control