AD7247AARZ-REEL7

Overview

The AD7247AARZ-REEL7 is a dual 12-bit voltage-output digital-to-analog converter (DAC) featuring on-chip amplifiers and a Zener reference. It operates from single (+12 V to +15 V) or dual supplies (±12 V to ±15 V). The device accepts parallel data via separate Chip Select inputs for each DAC channel, with a common Write input. Key electrical parameters include a typical settling time of 5 μs, relative accuracy of ±1 LSB (A version), and output ranges of 0 V to +5 V, 0 V to +10 V, or ±5 V. It is housed in a 24-lead SOIC package.

Feature Summary

• Dual 12-bit DACPORT architecture with integrated output amplifiers and internal 5 V reference
• Parallel interface structure with independent Chip Select inputs for simultaneous or individual DAC control
• Configurable output voltage ranges: 0 V to +5 V, 0 V to +10 V (unipolar), and ±5 V (bipolar)
• Typical settling time of 5 μs and low power consumption of 165 mW in single supply mode

Applications

• Industrial process control systems requiring precise analog signal generation
• Portable instrumentation utilizing single-supply operation
• Microprocessor-based data acquisition and control interfaces
• Programmable power supplies and waveform generators

Procurement Notes

Verify the suffix REEL7 indicates tape-and-reel packaging when sourcing. Confirm the A version temperature range (-40 °C to +85 °C) matches application requirements. Ensure ESD precautions are observed during handling due to CMOS sensitivity. Cross-reference pinout compatibility if replacing legacy AD7247 units.

Selection Notes

Select the AD7247A over the AD7237A when a direct 12-bit parallel interface is preferred over an 8-bit double-buffered structure. Choose the A version for industrial temperature ranges; use the T version for extended -55 °C to +125 °C operation. Verify that the required output swing aligns with the available unipolar or bipolar configurations supported by the ROFS pins.

Part Context

This component is part of the enhanced AD7237A/AD7247A family, succeeding the industry-standard AD7237/AD7247. Improvements include faster interface times (30 ns setup), wider supply voltage tolerance (12 V to 15 V), and improved reference stability. It utilizes Linear Compatible CMOS (LC2MOS) technology for precision mixed-signal performance.

Replacement Considerations

The AD7247AAN and AD7247ABN are pin-compatible alternatives offering DIP packaging. The AD7247ATQ provides extended temperature capability. Direct replacement requires verifying the specific accuracy grade (A vs B) and ensuring the new package type fits the board layout.