AD5725ARSZ-REEL

Overview

The AD5725ARSZ-REEL is a quad, 12-bit parallel input voltage output digital-to-analog converter manufactured by Analog Devices Inc. It operates from single +5 V to ±15 V supplies and supports unipolar or bipolar output configurations via external VREFP and VREFN inputs. Key electrical specifications include a maximum integral nonlinearity (INL) of ±0.5 LSB for the B grade and a maximum settling time of 10 µs for a 10 V step. The device features double-buffered inputs, simultaneous updating via LDAC, and an asynchronous CLR function. It is housed in a 28-lead SSOP package and operates within a temperature range of −40°C to +85°C.

Feature Summary

• Quad 12-bit resolution with guaranteed monotonicity and ±0.5 LSB max INL (B grade).
• Parallel interface with readback capability and double-buffered input registers.
• Asynchronous CLR to zero/midscale and simultaneous DAC updating via LDAC.
• Wide supply operation from +5 V to ±15 V with power dissipation under 270 mW.

Applications

• Industrial automation systems
• Closed-loop servo control and process control
• Automotive test and measurement equipment
• Programmable logic controllers

Procurement Notes

Verify the specific grade (A or B) required for INL performance, as specifications differ between grades. Confirm that the REEL suffix indicates tape-and-reel packaging suitable for automated assembly. Ensure the design accounts for the parallel interface timing requirements and reference current sourcing/sinking capabilities when selecting external components.

Selection Notes

Select the AD5725ARSZ-REEL for applications requiring four independent 12-bit channels with high accuracy and fast settling times. Choose this part over serial alternatives if system bandwidth demands parallel data throughput. Verify that the host controller can drive the 12-bit parallel bus and manage the CS, R/W, and LDAC control signals effectively.

Part Context

This component belongs to the AD5725 family of high-performance DACs. The ARSZ designation identifies the 28-lead SSOP package variant, while the -REEL suffix specifies the reel packaging format. It utilizes iCMOS process technology to achieve high voltage operation with reduced power consumption compared to standard CMOS processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin compatibility and electrical specifications if considering alternative quad DACs from other manufacturers.

FAQ

How is the output voltage range configured?

The output voltage range is set by the voltages applied to the VREFP and VREFN pins. Unipolar positive output is achieved by setting VREFN to 0 V and VREFP to a positive voltage. Bipolar outputs are configured by connecting both references to nonzero voltages.

What is the function of the CLR pin?

The CLR pin is an active low input that asynchronously sets the DAC registers to zero scale (0x000) or midscale (0x800), depending on the specific model variant. It is independent of the Chip Select (CS) signal.

Can the AD5725 operate with a single +5 V supply?

Yes, the device can operate with a single +5 V supply (AVDD = +5 V, AVSS = 0 V). In this configuration, the reference inputs must be adjusted accordingly, typically using VREFN = 0 V for unipolar operation.