AD7846KP

Overview

The AD7846KP is a 16-bit voltage output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. utilizing the LC2MOS process. It features a segmented architecture ensuring guaranteed 16-bit monotonicity over temperature, with an integral linearity error of ±2 LSBs for K versions. The device includes an on-chip output amplifier configurable for unipolar or bipolar ranges and supports microprocessor interfacing with readback capability. Key electrical parameters include a typical power dissipation of 100 mW, a settling time of 6 μs to 0.006% FSR, and operation within a commercial temperature range of 0°C to +70°C.

Feature Summary

• 16-bit resolution with guaranteed monotonicity over temperature
• ±2 LSBs maximum integral nonlinearity error (K version)
• Microprocessor compatible interface with DAC register readback
• Low power consumption of 100 mW typical

Applications

• Closed-loop control systems requiring high accuracy
• Automatic Test Equipment (ATE) utilizing readback diagnostics
• Position measurement applications using LVDTs
• Multiplying DAC configurations for signal processing

Procurement Notes

Verify that the ordering suffix 'KP' corresponds to the plastic package variant with the commercial temperature range (0°C to +70°C). Confirm supply availability as specifications are subject to change without notice. Ensure compatibility with required analog supply voltages (+11.4 V to +15.75 V) and digital supply (+4.75 V to +5.25 V).

Selection Notes

Select the AD7846KP when 16-bit monotonicity and low power are critical constraints. The K version offers tighter linearity specifications (±2 LSB INL) compared to the J version (±12 LSB INL). Ensure the application can accommodate the parallel data interface and the specific output voltage range configurations defined by the RIN pin connections.

Part Context

The AD7846 belongs to a family of 16-bit DACs available in multiple packages including PDIP, CERDIP, PLCC, and LCC. The KP designation specifically identifies the plastic DIP package variant intended for commercial temperature operations. Other variants such as the AD7846BJZ offer extended industrial temperature ranges (-40°C to +85°C) with similar performance characteristics.

Replacement Considerations

For direct replacements, consider the AD7846JPZ for ceramic DIP packaging or the AD7846BJZ for industrial temperature range requirements. Verify that substitute components maintain the same LC2MOS architecture and parallel interface timing specifications.