AD7840 is a 14-bit high precision high-speed D/A converter with parallel and serial interfaces. It supports 3V and 5V interface levels and can be directly interfaced with DSPs such as ADSP-2100. The output voltage is between 2.5V and 5.5V, and the maximum output current is 5mA.
The AD7840 is a 14‑bit voltage‑output digital‑to‑analog converter that integrates a buried Zener reference, output buffer, and high‑speed control logic. It supports both parallel and serial data interfaces, making it compatible with high‑speed DSPs and microprocessors. The device operates from ±5 V supplies and delivers a bipolar output range of ±3 V.
Key features include a 70 mW typical power draw, 80 dB signal‑to‑noise ratio, and a maximum serial clock rate of 6 MHz. The AD7840 is offered in 24‑pin DIP, 28‑pin PLCC, and hermetic packages, and includes on‑chip ESD protection and a 3 V reference output capable of sourcing 500 µA.
Typical power consumption is about 70 mW.
The serial interface can run at up to 6 MHz.