AD7840KN

The AD7840KN is a fast, complete 14-bit voltage output Digital-to-Analog Converter (DAC) manufactured by Analog Devices. It integrates a 14-bit DAC, a 3V buried Zener reference, a DAC output amplifier, and high-speed control logic. The device features a double-buffered interface with 14-bit input and DAC latches, supporting both parallel and serial data loading modes.

Key electrical specifications include an 80 dB signal-to-noise ratio, a minimum WR pulse width of 45 ns, and a typical power consumption of 70 mW. It operates from ±5V supplies and provides a bipolar output range of ±3V. The fast data setup time of 21 ns in parallel mode allows direct interfacing with digital signal processors and 16-bit microprocessors. In serial mode, it supports a maximum serial data clock rate of 6 MHz.

The AD7840KN is fabricated using Linear Compatible CMOS (LC2MOS) technology, combining precision bipolar circuits with low-power CMOS logic. It is available in a 24-pin plastic and hermetic dual-in-line package (DIP) and a 28-terminal plastic leaded chip carrier (PLCC). Full power output signals up to 20 kHz can be created, making it suitable for applications requiring dynamic performance specifications.