AD5721RBRUZ

Overview

The AD5721RBRUZ is a single-channel, 12-bit serial input voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated low-drift 2.5 V reference with ±2 ppm/°C typical drift and internal reference buffers. The device supports software-programmable output ranges including 0 V to +5 V, 0 V to +10 V, 0 V to +16 V, 0 V to +20 V, ±3 V, ±5 V, ±10 V, and −2.5 V to +7.5 V, with 5% overrange capability. Key electrical specifications include a maximum total unadjusted error (TUE) of 0.1% FSR, guaranteed monotonicity within ±1 LSB, and a typical settling time of 7.5 μs. It operates on analog supplies from +4.75 V to +30 V (VDD) and −16.5 V to 0 V (VSS), with a digital supply range of 1.7 V to 5.5 V.

Feature Summary

• 12-bit resolution with ±0.5 LSB INL/DNL and guaranteed monotonicity
• Integrated 2.5 V reference with ±2 ppm/°C temperature coefficient
• 8 software-selectable bipolar/unipolar output ranges with 5% overrange
• Low noise performance: 35 nV/√Hz spectral density and 1 nV-sec glitch impulse

Applications

• Industrial automation systems
• Precision instrumentation and data acquisition
• Open-loop and closed-loop servo control
• Process control applications
• Programmable logic controllers (PLCs)

Procurement Notes

Verify the package type upon ordering, as the AD5721R series is available in both 16-lead TSSOP and 3 mm × 3 mm LFCSP configurations. Confirm that the specific suffix corresponds to the required mechanical footprint for the design. Ensure compatibility with the intended analog supply voltages, which can range up to +30 V for unipolar operation.

Selection Notes

Select the AD5721RBRUZ when a 12-bit resolution is sufficient for the application's accuracy requirements. This model is appropriate for designs requiring a wide dynamic output range, such as ±10 V or 0–20 V signals, without external scaling amplifiers. Consider the internal reference if board space is limited; otherwise, an external reference can be applied to the VREFIN/VREFOUT pin for potentially lower noise.

Part Context

The AD5721RBRUZ belongs to the AD5761R/AD5721R family of precision DACs. While functionally identical in architecture and interface, the AD5721R variant provides 12-bit resolution compared to the 16-bit AD5761R. Both share the same low-drift reference technology and programmable output range capabilities, allowing for pin-compatible upgrades between resolutions within the same package styles.

Replacement Considerations

The AD5721BRUZ is a compatible alternative within the same product family offering identical 12-bit performance and pinout. Designers may also consider the AD5761R series if higher 16-bit resolution is required, as these devices share the same functional block diagram and interface protocols.