AD7846BPZ

Overview

The AD7846BPZ 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 the B version. The device includes an on-chip output amplifier configurable for unipolar or bipolar ranges and supports multiplying operations. 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 interface with readback capability.

Feature Summary

• 16-bit resolution with guaranteed monotonicity over temperature
• ±2 LSBs maximum integral nonlinearity error (B Version)
• Microprocessor compatible interface with DAC register readback function
• Configurable unipolar (0 V to +10 V) or bipolar (±10 V) output ranges

Applications

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

Procurement Notes

Verify that the ordering suffix 'PZ' corresponds to the 28-lead PLCC package as specified in the manufacturer's ordering guide. Confirm the 'B' suffix indicates the grade with ±2 LSB INL and industrial temperature range (-40°C to +85°C). Ensure compatibility with the required ±15 V analog power supplies and +5 V digital logic levels before procurement.

Selection Notes

Select the AD7846BPZ when 16-bit monotonicity and low power consumption (100 mW typ) are critical. The B version offers tighter linearity specifications (±2 LSB INL) compared to the K version (±4 LSB INL). Ensure the application can accommodate the required dual analog supply rails (±11.4 V to ±15.75 V) and the 28-lead PLCC footprint. This component is suitable for systems needing simultaneous multi-DAC updates via the LDAC pin.

Part Context

The AD7846 series comprises 16-bit DACs available in PDIP, CERDIP, and PLCC packages. The AD7846BPZ specifically denotes the plastic leaded chip carrier variant with industrial temperature rating. It belongs to a family designed for precision applications where low power and high accuracy are balanced. The device distinguishes itself from R-2R architectures by using a segmented design to ensure monotonicity without tight resistor matching requirements.

Replacement Considerations

Public confirmed substitute part numbers: AD7846KNZ, AD7846JPZ.