GENERAL DESCRIPTION

The AD7765 is a high performance, 24-bit sigma-delta (Σ-Δ) analog-to-digital converter (ADC). It combines wide input bandwidth, high speed, and performance of 112 dB dynamic range at a 156 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 Σ-Δ ADC

115 dB dynamic range at 78.125 kHz output data rate

112 dB dynamic range at 156 kHz output data rate

156 kHz maximum fully filtered output word rate

Pin-selectable oversampling rates of 128× and 256×

Low power mode

Flexible serial peripheral interface (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 the SYNC pin

Daisy chaining

APPLICATIONS

Data acquisition systems

Vibration analysis

Instrumentation