GENERAL DESCRIPTION
The AD7951 is a 14-bit, charge redistribution, successive approximation register (SAR) architecture analog-to-digital converter (ADC) fabricated on Analog Devices, Inc.’s iCMOS high voltage process. The device is configured through hardware or via a dedicated write only serial configuration port for input range and operating mode. The AD7951 contains a high speed 14-bit sampling ADC, an internal conversion clock, an internal reference (and buffer), error correction circuits, and both serial and parallel system interface ports.

FEATURES
   Multiple pins/software programmable input ranges:
      5 V, 10 V, ±5 V, ±10 V
   Pins or serial SPI® compatible input ranges/mode selection
   Throughput
      1 MSPS (warp mode)
      800 kSPS (normal mode)
      670 kSPS (impulse mode)
   14-bit resolution with no missing codes
   INL: ±0.3 LSB typ, ±1 LSB max (±61 ppm of FSR)
   SNR: 85 dB @ 2 kHz
   iCMOS® process technology
   5 V internal reference: typical drift 3 ppm/°C; TEMP output
   No pipeline delay (SAR architecture)
   Parallel (14- or 8-bit bus) and serial 5 V/3.3 V interface
   SPI-/QSPI™-/MICROWIRE™-/DSP-compatible
   Power dissipation:
      10 mW @ 100 kSPS
      235 mW @ 1 MSPS
   48-lead LQFP and LFCSP (7 mm × 7 mm) packages

APPLICATIONS
   Process control
   Medical instruments
   High speed data acquisition
   Digital signal processing
   Instrumentation
   Spectrum analysis
   ATE