AD7247KNZ

Overview

The AD7247KNZ is a dual-channel, 12-bit digital-to-analog converter (DAC) from Analog Devices. It utilizes an R-2R resistor ladder architecture with buffered voltage outputs. The device supports parallel word input loading and operates with supply voltages ranging from ±10.8 V to ±16.5 V. Key electrical specifications include a settling time of 8 µs, a differential nonlinearity (DNL) of ±0.9 LSB, and an integral nonlinearity (INL) of ±1 LSB. It features both internal and external reference options and is housed in a 24-pin ceramic dual in-line package (CDIP).

Feature Summary

• Dual-channel 12-bit resolution with R-2R architecture
• Buffered voltage output with ±15V typical supply operation
• High accuracy: DNL ±0.9 LSB, INL ±1 LSB
• 8 µs settling time for rapid signal updates

Applications

• Industrial process control systems requiring precise analog signal generation
• Test and measurement equipment needing stable dual-channel DAC performance
• Data acquisition systems interfacing with high-resolution sensors

Procurement Notes

Verify the specific suffix 'KNZ' against official Analog Devices documentation to confirm pinout compatibility and material composition. Ensure that the CDIP package dimensions match the target PCB footprint. Confirm RoHS compliance status directly with the manufacturer or authorized distributors, as historical data may vary by production batch.

Selection Notes

Select the AD7247KNZ when a dual-channel solution with high linearity and fast settling is required. Compare the 8 µs settling time against system update rate requirements. Verify that the parallel interface logic levels are compatible with the host microcontroller or FPGA. Consider the thermal dissipation capabilities of the ceramic package if operating near maximum temperature limits.

Part Context

The AD7247 belongs to the DACPORT family of monolithic DACs. It is part of a broader series including variants like the AD7247JNZ and AD7247AARZ, which differ primarily in package type (PDIP/SOIC vs. CDIP) and temperature range. The KNZ designation specifically indicates the ceramic dual in-line package variant suitable for harsh environments.

Replacement Considerations

Direct replacements include other AD7247 variants such as AD7247JNZ (PDIP) or AD7247AARZ (SOIC), provided the package form factor change is acceptable. Cross-referencing with the AD7237 is possible if single-channel functionality suffices, though pinouts may differ.