AD7226BE

Overview

The AD7226BE is a quad 8-bit digital-to-analog converter (DAC) manufactured by Analog Devices Inc. It features four independent R-2R ladder DACs with integrated buffered output amplifiers, housed in a 20-pin plastic dual in-line package (PDIP). The device operates on a single positive supply voltage ranging from 14.25V to 15.75V for the digital section and 11.4V to 16.5V for the analog section. Key electrical specifications include a settling time of 4µs, an integral nonlinearity (INL) of ±0.5 LSB maximum, and a differential nonlinearity (DNL) of ±1 LSB maximum. It supports parallel data interfaces compatible with TTL and CMOS logic levels.

Feature Summary

• Quad architecture containing four independent 8-bit DAC channels with buffered voltage outputs
• High-speed performance with a typical settling time of 4µs
• Microprocessor-compatible parallel interface supporting both TTL and CMOS logic levels
• Extended industrial temperature range operation from -40°C to +85°C

Applications

• Process control systems requiring multi-channel signal generation
• Automatic test equipment for waveform synthesis
• Automatic calibration circuits for large system parameters such as gain and offset adjustment

Part Context

The AD7226 belongs to the AD7226 family of high-performance CMOS quad DACs. The 'B' suffix in AD7226BE denotes the extended industrial temperature grade (-40°C to +85°C), distinguishing it from commercial variants. This component serves as a foundational building block for multi-channel analog output stages in embedded systems where moderate resolution and speed are required.

Replacement Considerations

The TLC7226 series from Texas Instruments offers functional compatibility with similar pinouts and specifications. Designers should verify that the replacement part meets the specific supply voltage requirements and settling time constraints of the original design.