AD7846JPZ-REEL

Overview

The AD7846JPZ-REEL is a 16-bit voltage output digital-to-analog converter (DAC) manufactured by Analog Devices Inc. Constructed using the LC2MOS process, it features a segmented architecture ensuring guaranteed monotonicity over temperature. The device includes an on-chip output amplifier and supports unipolar or bipolar output configurations. 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 electrical specifications include ±2 LSBs integral linearity error for J/A versions, a typical power dissipation of 100 mW, and a settling time of 6 μs to 0.006% FSR. The component is housed in a 28-lead PLCC package.

Feature Summary

• 16-bit resolution with guaranteed monotonicity over temperature
• Microprocessor compatible interface with readback capability via I/O latch
• On-chip output amplifier supporting unipolar (0 V to +10 V) and bipolar (±10 V) ranges
• Low power consumption of 100 mW typical

Applications

• Automatic Test Equipment (ATE)
• Closed-loop control systems
• Position measurement applications using LVDTs
• Multiplying DAC circuits

Procurement Notes

Verify that the ordering suffix JPZ corresponds to the plastic PLCC package variant. Confirm the temperature grade matches application requirements: J version for 0°C to +70°C or A version for -40°C to +85°C. Ensure supply voltages align with the specified ranges of ±11.4 V to ±15.75 V for analog rails and +4.75 V to +5.25 V for digital logic. Check datasheet revision H for updated pinout details.

Selection Notes

Select the J or K version for commercial temperature range (0°C to +70°C) or A or B version for industrial range (-40°C to +85°C). The J/A versions offer tighter integral linearity specifications (±2 LSBs max) compared to K/B versions (±4 LSBs max). Ensure the system requires a parallel interface with readback functionality, as this distinguishes the AD7846 from serial alternatives. Verify load requirements do not exceed the 2 kΩ resistive or 1000 pF capacitive limits without external buffering.

Part Context

The AD7846 is part of Analog Devices' high-precision DAC family utilizing LC2MOS technology. It serves as a 16-bit counterpart to lower-resolution models like the AD7845 (12-bit). The device is designed for applications requiring high accuracy and low power, such as precision instrumentation and industrial automation. The REEL suffix indicates tape-and-reel packaging suitable for automated surface-mount assembly.

Replacement Considerations

Direct replacements within the same package and specification class are limited. The AD7845 offers similar functionality but with 12-bit resolution. For higher performance or different interfaces, newer Analog Devices DACs may be required, though pin compatibility and software drivers will likely need adaptation. Verify if the specific readback feature is critical; if not, simpler parallel DACs may suffice.