AD7249AR

Overview

The AD7249AR is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, packaged in a 16-lead SOIC. It integrates output amplifiers and a Zener voltage reference on a monolithic CMOS chip, eliminating the need for external trims. The device supports single or dual supply operation with selectable output ranges of 0 V to +5 V, 0 V to +10 V, or ±5 V. It features a 3-wire serial interface allowing data rates up to 2 MHz, resulting in a DAC update rate of 125 kHz. Key static performance metrics include a settling time of 10 µs max, differential nonlinearity of ±0.9 LSB max, and integral nonlinearity of ±1 LSB max.

Feature Summary

• Dual 12-bit DAC channels with integrated output amplifiers and internal Zener reference
• Three selectable output voltage ranges per channel: 0 V to +5 V, 0 V to +10 V, and ±5 V
• 3-wire serial interface compatible with DSP processors and microcontrollers
• 125 kHz DAC update rate with 10 µs maximum settling time

Applications

• Process Control systems
• Industrial Automation
• Digital Signal Processing Systems
• Input/Output Ports

Procurement Notes

Verify the specific suffix 'AR' corresponds to the industrial temperature range (-40°C to +85°C) and SOIC package. Confirm RoHS compliance status as manufacturing practices may vary by production batch. Check for obsolescence notices or lifecycle status updates from Analog Devices prior to finalizing procurement plans.

Selection Notes

Select the AD7249AR when dual-channel 12-bit resolution with buffered voltage outputs is required. Ensure the application supports the specified power supply ranges (+10.8 V to +16.5 V). Verify that the serial interface timing requirements align with the host processor's capabilities. Consider the 10 µs settling time if high-speed dynamic response is critical.

Part Context

The AD7249 belongs to the DACPORT family, which utilizes LC2MOS technology for mixed-signal integration. This component serves as a predecessor or variant within the broader series, often compared with parts like the AD7249AN (DIP package) or AD7249BRZ (improved accuracy grade). It provides a compact solution for applications requiring multiple analog outputs controlled via serial data.

Replacement Considerations

Direct replacement options include the AD7249ARZ, which offers identical functionality with updated packaging or compliance standards. Other variants within the AD7249 family, such as the AD7249BNZ, share similar electrical characteristics but differ in package type (PDIP vs. SOIC).