ADR434BRZ-REEL7

Overview

The ADR434BRZ-REEL7 is a precision voltage reference from the ADR43x series, utilizing XFET technology to deliver low noise and high accuracy. It provides a fixed output of 4.096 V with an initial accuracy of ±1.5 mV (±0.04%) and a maximum temperature coefficient of 3 ppm/°C for the B grade. The device operates within a supply voltage range of 6.1 V to 18 V, requiring only 2 V of headroom. It features a quiescent current of 800 µA and can source up to 30 mA or sink up to -20 mA. The component is housed in an 8-lead SOIC package and functions reliably across an extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Utilizes XFET technology for exceptionally low noise performance without requiring external capacitors.
• Offers high output drive capability with both sourcing and sinking current capacity.
• Includes a dedicated trim terminal allowing for precise output voltage adjustment over a ±5% range.
• Features minimal supply voltage headroom requirements compared to traditional buried Zener references.

Applications

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

Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, as the REEL7 designation indicates tape and reel packaging. Confirm the B grade specification aligns with the necessary temperature coefficient and accuracy requirements for the design. Ensure the input voltage supply remains within the 6.1 V to 18 V operating range to maintain proper regulation and performance characteristics.

Selection Notes

Select this component when low noise and high stability are critical for analog signal processing. The B grade offers superior temperature stability compared to the A grade variant. Consider the 8-lead SOIC package for surface mount assembly compatibility. Evaluate the need for the trim pin if fine-tuning of the reference voltage is required during system calibration.

Part Context

This part belongs to the ADR430/ADR431/ADR433/ADR434/ADR435 family of ultralow noise XFET voltage references. These devices share common architectural features including low supply current and high output drive capabilities. The ADR434 specifically targets applications requiring a 4.096 V reference level, distinguishing it from other members of the series that provide different nominal output voltages such as 2.048 V or 5.000 V.

Replacement Considerations

Direct substitutes within the same family include the ADR434ARMZ for MSOP packaging or the standard tube-packaged ADR434BRZ. Verify that any replacement maintains the B grade specifications for temperature coefficient and initial accuracy to ensure equivalent circuit performance.