AD7846KNZ

Overview

The AD7846KNZ 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 ±2 LSBs integral linearity error for K versions. The device includes an on-chip output amplifier configurable for unipolar or bipolar ranges, such as 0 V to +10 V or ±10 V. It operates with analog supplies of ±11.4 V to ±15.75 V and a digital supply of 4.75 V to 5.25 V. Key specifications include a typical power dissipation of 100 mW, a settling time of 6 μs to 0.006% FSR, and a microprocessor-compatible parallel interface with readback capability.

Feature Summary

• 16-bit resolution with guaranteed monotonicity over temperature
• Microprocessor compatible interface with DAC register readback function
• Configurable unipolar or bipolar output voltage ranges via external resistors
• Low power consumption with typical dissipation of 100 mW

Applications

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

Procurement Notes

Verify the specific suffix 'KNZ' corresponds to the plastic DIP-28 package and the commercial temperature range (0°C to +70°C). Confirm that the ordering code matches the required performance grade, as other suffixes like 'JPZ' indicate different packages and potentially different temperature ratings. Ensure compatibility with existing PCB footprints for through-hole mounting.

Selection Notes

Select the AD7846KNZ 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). Consider the parallel interface requirements and ensure the host system can manage the necessary control signals (CS, R/W, LDAC, CLR). Verify that the available supply voltages align with the specified ranges for optimal performance.

Part Context

The AD7846 belongs to the AD7846 series of precision DACs from Analog Devices. It is part of a family offering various package options including ceramic DIP and PLCC. The KNZ designation specifically identifies the plastic dual in-line package variant. This component is designed for applications demanding high precision and reliability in industrial and instrumentation environments.

Replacement Considerations

Direct pin-for-pin replacements within the same package and electrical specifications should be verified against the manufacturer's current cross-reference guide. Other variants in the AD7846 series may offer different temperature ranges or packaging but must match the 16-bit resolution and parallel interface requirements.