GENERAL DESCRIPTION
The AD7725 is a complete 16-bit,Σ-Δ analog-to-digital converter with on-chip, user-programmable signal conditioning. The output of the modulator is processed by three cascaded finite impulse response (FIR) filters, followed by a fully user-programmable postprocessor. The postprocessor provides processing power of up to 130 million accumulates (MAC) per second. The user has complete control over the filter response, the filter coefficients, and the decimation ratio.

FEATURES
   Programmable Filtering:
      Any Characteristic up to 108 Tap FIR and/or IIR
   Polynomial Signal Conditioning up to 8th Order
   Programmable Decimation and Output Word Rate
   Flexible Programming Modes:
      Boot from DSP or External EPROM
      Parallel/Serial Interface
   Internal Default Filter for Evaluation
   14.4 MHz Max Master Clock Frequency
   0 V to +4 V (Single-Ended) or ±2 V (Differential) Input
      Range
   Power Supplies: AVDD, DVDD: 5 V ± 5%
   On-Chip 2.5 V Voltage Reference
   44-Lead MQFP Package

TYPICAL APPLICATIONS
   Radar
   Sonar
   Auxiliary Car Functions
   Medical Communications