AD7243BR

Overview

The AD7243BR is a 12-bit voltage output digital-to-analog converter featuring an on-chip Zener voltage reference and a buffered output amplifier. Fabricated using LC2MOS technology, it supports single or dual supply operation with selectable output ranges of 0 V to +5 V, 0 V to +10 V, or ±5 V. The device utilizes a 3-wire serial interface compatible with DSPs and microcomputers, supporting data rates up to 5 MHz for a 300 kHz DAC update rate. Key specifications include a settling time of 10 µs maximum, relative accuracy of ±1 LSB (B grade), and low power dissipation of 100 mW typical. It is available in 16-lead DIP and SOIC packages.

Feature Summary

• Integrated 12-bit DAC with factory-trimmed 5 V internal reference and buffered output amplifier
• Three selectable output voltage ranges: 0 V to +5 V, 0 V to +10 V, and ±5 V via ROFS pin configuration
• Serial interface supporting 300 kHz update rate with daisy-chain capability via SDO output
• Clear function (CLR) resets output to 0 V or -REFIN for known power-on state

Applications

• Process control systems requiring precise analog signal generation
• Industrial automation equipment and programmable logic controllers
• Digital signal processing systems with serial data interfaces
• Microcomputer input/output ports for analog control

Procurement Notes

Verify the specific suffix 'BR' against manufacturer documentation to confirm temperature range and accuracy grade. The datasheet specifies A and B grades operating from -40°C to +85°C. Ensure ordering details match the required package type (DIP or SOIC) and verify RoHS compliance status for the specific manufacturing lot.

Selection Notes

Select the AD7243BR when a monolithic solution with integrated reference and amplifier is required to minimize external component count. Choose this part if the application demands a serial interface to reduce pin usage on the host processor. Verify that the required output swing matches the available unipolar or bipolar configurations supported by the chosen power supply rails.

Part Context

The AD7243 belongs to Analog Devices' DACPORT family of complete digital-to-analog converters. This series integrates DAC, reference, and amplifier functions on a single CMOS chip to improve reliability over multichip designs. The AD7243 specifically targets applications needing moderate resolution (12-bit) with high speed and serial connectivity.

Replacement Considerations

Check for AD7243ARZ as a potential alternative in SOIC packaging. Verify pin compatibility and electrical specifications before substitution. No other direct cross-model replacements are confirmed in the provided documentation.