GENERAL DESCRIPTION

The AD7764 is a high performance, 24-bit Σ-Δ analog-to-digital converter (ADC). It combines wide input bandwidth, high speed, and performance of 109 dB dynamic range at a 312 kHz output data rate. With excellent dc specifications, the converter is ideal for high speed data acquisition of ac signals where dc

data is also required.

FEATURES

High performance 24-bit ∑-∆ ADC

115 dB dynamic range at 78 kHz output data rate

109 dB dynamic range at 312 kHz output data rate

312 kHz maximum fully filtered output word rate

Pin-selectable oversampling rate (64×, 128×, and 256×)

Low power mode

Flexible SPI

Fully differential modulator input

On-chip differential amplifier for signal buffering

On-chip reference buffer

Full band low-pass finite impulse response (FIR) filter

Overrange alert pin

Digital gain correction registers

Power-down mode

Synchronization of multiple devices via SYNC pin

Daisy chaining

APPLICATIONS

Data acquisition systems

Vibration analysis

Instrumentation