AD7247AANZ

Overview

The AD7247AANZ is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, packaged in a 24-lead plastic DIP. It integrates two independent DAC channels with on-chip output amplifiers and a Zener voltage reference. The device operates from single (+12 V to +15 V) or dual supplies (±12 V to ±15 V). Key electrical parameters include a typical settling time of 5 μs, a maximum relative accuracy of ±1 LSB, and a reference input range of 4.75 V to 5.25 V. It features a parallel data interface with separate chip select inputs for each channel.

Feature Summary

• Dual 12-bit CMOS DACs with integrated output amplifiers and internal 5 V reference
• Parallel loading structure with separate Chip Select inputs for independent DAC control
• Supports unipolar (0–5 V, 0–10 V) and bipolar (±5 V) output ranges via ROFS configuration
• Fast interface with typical 30 ns data setup time and 5 μs settling time

Applications

• Industrial process control systems requiring dual-channel analog output
• Portable instrumentation with single-supply operation capabilities
• Microprocessor-based data acquisition and signal generation systems

Procurement Notes

Verify the package option 'N' corresponds to the 24-pin plastic DIP format required for the specific board layout. Confirm that the temperature grade 'A' meets the operational range of –40 °C to +85 °C. Ensure power supply rails are within the specified +12 V to +15 V limits for optimal performance. Check for ESD sensitivity precautions during handling and assembly.

Selection Notes

Select the AD7247AANZ when a parallel interface with independent channel selection is preferred over serial alternatives like the AD7237A. Choose this part if the application requires an integrated reference and amplifier solution to minimize external component count. Verify that the 12-bit resolution and ±1 LSB accuracy align with system requirements. Consider the DIP package constraints if surface-mount technology is mandatory.

Part Context

The AD7247AANZ belongs to the AD7237A/AD7247A family of LC2MOS dual DACPORTs. It serves as the parallel-interface variant of the AD7237A, which uses an 8-bit bus structure. This family represents an enhanced version of the industry-standard AD7237/AD7247, offering improved speed and wider supply voltage operation.

Replacement Considerations

The AD7247ABR offers identical functionality in a 24-lead SOIC package. The AD7247ATQ provides extended temperature range capability (-55 °C to +125 °C). Direct pin-compatible replacements require matching the 24-pin DIP footprint and parallel interface logic.