AD7226BRSZ

Overview

The AD7226BRSZ is a monolithic quad 8-bit digital-to-analog converter (DAC) featuring integrated output buffer amplifiers and interface logic. Fabricated using Linear Compatible CMOS (LC2MOS) technology, it provides four independent voltage-output channels with laser-trimmed offsets, eliminating the need for external user trims. The device supports microprocessor-compatible TTL/CMOS interfaces via a common 8-bit data bus and individual latches controlled by address lines A0 and A1. It operates from dual supplies (VDD: +11.4 V to +16.5 V; VSS: –5 V) or a single +15 V supply. Key static performance metrics include ±0.5 LSB relative accuracy, ±1 LSB differential nonlinearity, and a maximum total unadjusted error of ±2 LSB at VREF = 10 V. The B version ensures operation across an extended temperature range of –40°C to +85°C.

Feature Summary

• Quad 8-Bit DACs with Integrated Buffer Amplifiers
• TTL/CMOS-Compatible Microprocessor Interface
• Laser-Trimmed Offsets (No User Trims Required)
• Extended Temperature Range (–40°C to +85°C)

Applications

• Process Control Systems
• Automatic Test Equipment
• Automatic Calibration of Large System Parameters

Procurement Notes

Verify that the ordering suffix 'B' corresponds to the industrial temperature range specification (–40°C to +85°C). Confirm package type matches the required footprint, as the AD7226 family includes DIP, SOIC, SSOP, and PLCC variants. Ensure power supply rails meet the minimum headroom requirements relative to the reference voltage for specified performance.

Selection Notes

Select the AD7226BRSZ when multiple synchronized 8-bit voltage outputs are required on a single chip. The B suffix denotes the extended temperature grade suitable for industrial environments. Ensure the application can provide a stable reference voltage between 2 V and (VDD – 4 V). For optimal settling time near ground in single-supply modes, consider if a negative VSS rail is necessary to maintain sink capability.

Part Context

The AD7226 is part of Analog Devices' LC2MOS family of precision analog-digital mixed-signal converters. This process technology allows high-speed digital logic and precision analog circuits to be integrated on the same die. The AD7226 specifically addresses applications requiring compact board space and inherent channel-to-channel matching due to simultaneous fabrication of all four DACs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.