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GENERAL DESCRIPTION

The AD7763 high performance, 24-bit, Σ-Δ analog-to-digital converter (ADC) combines wide input bandwidth and high speed with the benefits of Σ-Δ conversion, as well as performance of 107 dB SNR at 625 kSPS, making it ideal for high speed data acquisition. A wide dynamic range, combined with significantly reduced antialiasing requirements, simplifies the design process.

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

107 dB SNR at 625 kHz output data rate

625 kHz maximum fully filtered output word rate

Programmable oversampling rate (32× to 256×)

Flexible serial interface

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

Low power and power-down modes

Synchronization of multiple devices via SYNC pin

I2S interface mode

APPLICATIONS

Data acquisition systems

Vibration analysis

Instrumentation