The AD7765 is a high performance, 24-bit Σ-Δ analog-to-digital converter (ADC) that combines wide input bandwidth, high dynamic range, and low power consumption.
The AD7765 is a high‑performance 24‑bit analog‑to‑digital converter offering up to 156 kSPS output data rate, low‑power operation, and on‑chip buffering. It targets data‑acquisition systems, vibration analysis, and other high‑speed measurement applications.
This document details the device’s features, functional block diagram, electrical specifications, timing diagrams, absolute maximum ratings, and register map. It also includes application notes, synchronization options, and power‑consumption data to aid designers in integrating the AD7765 into their systems.
| Dynamic Range (256× decimation) | 115 dB typ |
|---|---|
| Signal‑to‑Noise Ratio (256× decimation) | 109 dB typ |
| Power Consumption (Normal Power Mode, 128× decimation) | 300 mW typ |
| Power Consumption (Low Power Mode, 128× decimation) | 160 mW typ |
| Supply Voltage (General Supply) | 5 V |
The maximum ODR is 156.25 kHz when using a 40 MHz master clock and 128× decimation.
Devices can be synchronized by connecting their SYNC pins for daisy‑chaining operation.
The AD7765 operates from –40 °C to +85 °C (commercial grade).
In low‑power mode with 128× decimation, the device consumes about 160 mW typ.