EVAL-AD7762EB Datasheet PDF - Analog Devices

GENERAL DESCRIPTION
The AD7762 is a high performance, 24-bit Σ-Δ analog-to digital converter (ADC). It combines wide input bandwidth and high speed with the benefits of Σ-Δ conversion with a performance of 106 dB SNR at 625 kSPS, making it ideal for high speed data acquisition. Wide dynamic range combined with significantly reduced antialiasing requirements simplify the design process. An integrated buffer to drive the reference, a differential amplifier for signal buffering and level shifting, an overrange flag, internal gain and offset registers, and a low-pass digital FIR filter make the AD7762 a compact, highly integrated data acquisition device requiring minimal peripheral component selection. In addition, the device offers programmable decimation rates, and the digital FIR filter can be adjusted if the default characteristics are not appropriate to the application. The AD7762 is ideal for applications demanding high SNR without a complex front end signal processing design.

FEATURES
  120 dB dynamic range at 78 kHz output data rate
  109 dB dynamic range at 625 kHz output data rate
  112 dB SNR at 78 kHz output data rate
  106 dB SNR at 625 kHz output data rate
  625 kHz maximum fully filtered output word rate
  Programmable over-sampling rate (32× to 256×)
  Fully differential modulator input
  On-chip differential amplifier for signal buffering
  Low-pass finite impulse response (FIR) filter with default or user-programmable coefficients
  Overrange alert bit
  Digital offset and gain correction registers
  Filter bypass modes
  Low power and power-down modes
  Synchronization of multiple devices via SYNC pin

APPLICATIONS
  Data acquisition systems
  Vibration analysis
  Instrumentation