AD7226KR-REEL

Overview

The AD7226KR-REEL is a quad 8-bit digital-to-analog converter (DAC) fabricated in LC2MOS technology. It integrates four voltage-output DACs with buffer amplifiers and interface logic on a single chip. The device features separate on-chip latches for each channel, controlled via a common 8-bit TTL/CMOS compatible input port. Address lines A0 and A1 select the active DAC when the write signal (WR) goes low. Each output amplifier can drive up to 5 mA of current and is laser-trimmed to eliminate offset nulling requirements. The part supports dual supply operation (VDD: 11.4 V to 16.5 V; VSS: -5 V) or single supply operation at 14.25 V to 15.75 V. Key static performance metrics include ±0.5 LSB relative accuracy, ±1 LSB differential nonlinearity, and a settling time of 4 µs maximum.

Feature Summary

• Four independent 8-bit DACs with integrated buffered voltage outputs
• TTL/CMOS compatible parallel interface with individual data latches
• Laser-trimmed amplifier offsets requiring no user calibration
• Supports both dual supply (-5 V/+15 V) and single supply (+15 V) configurations

Applications

• Process control systems requiring multi-channel analog output
• Automatic test equipment for signal generation
• Automatic calibration of large system parameters such as gain and offset

Procurement Notes

Verify that the KR suffix corresponds to the K version operating temperature range of –40°C to +85°C. Confirm the REEL suffix indicates tape-and-reel packaging rather than tube packaging. Ensure the specific revision of the datasheet matches the production lot for any minor specification updates.

Selection Notes

Select this component when multiple synchronized 8-bit voltage outputs are required from a single package. The internal matching between DACs ensures precise tracking across channels. Verify that the reference voltage range (2 V to VDD–4 V) aligns with the available reference sources in the design.

Part Context

The AD7226 belongs to the Analog Devices LC2MOS family of high-speed precision converters. The 'K' designation specifies the industrial temperature grade, while 'R' typically denotes reel packaging. This monolithic integration reduces board space compared to discrete solutions using separate DACs and op-amps.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.