ADR430ARMZ-REEL7

Overview

The ADR430ARMZ-REEL7 is a precision voltage reference from the XFET series, manufactured by Analog Devices Inc. It provides a fixed output voltage of 2.048 V with an initial accuracy of ±1 mV (±0.05%) for the B grade. The device operates within a supply voltage range of 4.1 V to 18 V and requires a minimum headroom of 2 V. Key electrical characteristics include a maximum temperature coefficient of 3 ppm/°C, quiescent current of 800 µA, and low noise performance of 3.5 µV p-p in the 0.1 Hz to 10.0 Hz band. It supports sourcing up to 30 mA and sinking up to -20 mA of load current.

Feature Summary

• Utilizes XFET technology to minimize voltage change versus temperature nonlinearity through curvature correction.
• Features a dedicated trim terminal allowing output voltage adjustment over a ±0.5% range without compromising performance.
• Capable of high output source current up to 30 mA and sink current up to -20 mA.
• Operates at lower supply current and reduced voltage headroom compared to traditional buried Zener references.

Applications

• Precision data acquisition systems
• High resolution data converters
• Medical instruments
• Industrial process control systems

Procurement Notes

Verify the specific grade (A or B) required for your application, as the base part number may not specify it; check the full ordering code for suffixes indicating accuracy class. Confirm the package type matches your PCB footprint, as this model uses MSOP-8. Ensure the input voltage stays within the 4.1 V to 18 V operating range to maintain specified regulation and stability parameters.

Selection Notes

Select the ADR430 variant specifically when a 2.048 V reference is needed. Choose the B grade if tighter temperature coefficients (3 ppm/°C) and higher initial accuracy (±1 mV) are critical. Consider the low 2 V headroom requirement suitable for 5 V systems where power efficiency is important. Evaluate the trim pin utility if fine-tuning the reference voltage is necessary for system calibration.

Part Context

This component belongs to the ADR430/ADR431/ADR433/ADR434/ADR435 family of ultralow noise XFET voltage references. These devices share common architectural features such as low noise density, high current drive capability, and extended industrial temperature ranges (-40°C to +125°C). The family differentiates primarily by output voltage levels and specific grading options for precision applications.

Replacement Considerations

Direct functional substitutes within the same family include other ADR43x models with different fixed voltages (e.g., ADR431 for 2.5 V), though voltage matching is required. For exact replacement, verify that any alternative part maintains the 2.048 V output, MSOP-8 package, and comparable thermal drift specifications.

FAQ

What is the purpose of the COMP pin on the ADR430?

The COMP pin is a compensation input used to connect a series resistor and capacitor network from COMP to VOUT. This configuration helps reduce overall output noise.

Can the output voltage of the ADR430 be adjusted?

Yes, the device includes a TRIM pin that allows the output voltage to be adjusted over a ±0.5% range while maintaining performance specifications.

What is the minimum supply voltage headroom required for operation?

The ADR430 requires a minimum supply voltage headroom of 2 V (VIN - VOUT ≥ 2 V) to operate correctly within its specified parameters.