ADR434ARMZ-REEL7

Overview

The ADR434ARMZ-REEL7 is a precision voltage reference from the ADR43x series, manufactured by Analog Devices Inc. It provides a nominal output voltage of 4.096 V and operates within an input voltage range of 6.1 V to 18 V. The device features a maximum temperature coefficient of 10 ppm/°C for the A grade and draws a typical quiescent current of 800 µA. It supports sourcing up to 30 mA and sinking up to -20 mA of load current. The component is housed in an 8-lead MSOP package and is specified over an extended operating temperature range of -40°C to +125°C.

Feature Summary

• Utilizes XFET technology to minimize voltage change versus temperature nonlinearity through curvature correction.
• Offers high output source and sink current capabilities without requiring external capacitors for stability.
• Includes a trim terminal allowing adjustment of the output voltage over a ±0.5% range.
• Provides low noise performance suitable for precision applications in 5 V systems.

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 datasheet lists distinct accuracy and temperature coefficient specifications for each. Confirm that the supply voltage headroom meets the minimum requirement of 2 V above the output voltage. Ensure the PCB layout accommodates the COMP pin for noise reduction if necessary. Check for any recent Product Change Notices regarding manufacturing updates.

Selection Notes

Select this component when a stable 4.096 V reference is needed with low power consumption. Consider the A grade for standard industrial applications or the B grade for tighter initial accuracy requirements. Evaluate the need for the TRIM pin if precise voltage calibration is necessary. Ensure the thermal management strategy accounts for the package's thermal resistance characteristics under maximum load conditions.

Part Context

This part belongs to the ADR430/ADR431/ADR433/ADR434/ADR435 family of ultralow noise XFET voltage references. The family shares common architectural features but differs in nominal output voltages and minimum input voltage requirements. The ARMZ suffix indicates the MSOP package style, while REEL7 denotes the tape and reel packaging format for automated assembly.

Replacement Considerations

Other members of the ADR43x family may serve as alternatives if different output voltages are acceptable. Verify compatibility regarding package dimensions and pinout configurations before substitution. Cross-reference specific electrical parameters such as line regulation and noise density to ensure the replacement meets system performance criteria.