ADR3533WBRMZ-R7

Overview

The ADR3533WBRMZ-R7 is a micropower, high-precision CMOS voltage reference with a nominal output of 3.3 V. It features a maximum temperature coefficient of 5 ppm/°C and an initial output voltage error of ±0.1%. The device operates within an input voltage range of 3.5 V to 5.5 V and supports an operating temperature range from −40°C to +125°C. It provides an output current capacity of +10 mA source and −3 mA sink, with a maximum quiescent current of 100 μA. The component is qualified for automotive applications and utilizes DigiTrim technology for digital trimming.

Feature Summary

• Digital trimming via proprietary DigiTrim technology ensures high initial accuracy and low temperature coefficient.
• Low long-term drift performance improves lifetime system accuracy.
• Integrated enable pin allows for shutdown mode to minimize power consumption.
• Kelvin sense connections (VOUT FORCE, VOUT SENSE) support precise remote sensing.

Applications

• Automotive battery monitors
• Portable instrumentation
• Process transmitters
• Remote sensors
• Medical instrumentation

Procurement Notes

Verify the specific grade suffix 'B' corresponds to the required 5 ppm/°C temperature coefficient specification. Confirm the 'R7' suffix indicates reel packaging if tape-and-reel handling is required. Ensure the MSOP-8 package dimensions match the PCB footprint design. Check for RoHS compliance status in the latest manufacturer documentation before finalizing procurement.

Selection Notes

Select this component when a 3.3 V precision reference is needed with strict temperature stability requirements. The B-grade variant is suitable for applications demanding a maximum 5 ppm/°C drift. Consider the 100 μA quiescent current for battery-powered designs. Verify that the input voltage remains within the 3.5 V to 5.5 V range for proper regulation. The automotive qualification makes it appropriate for harsh environment deployments.

Part Context

This part belongs to the ADR35xx series of micropower voltage references from Analog Devices. The series includes variants with outputs of 2.5 V, 3.0 V, 3.3 V, 4.096 V, and 5.0 V. All members share similar architectural features, including CMOS construction, DigiTrim calibration, and automotive qualification. The ADR3533 specifically targets the 3.3 V output requirement within this family.

Replacement Considerations

ADR3533ARMZ-R7 (A Grade, 8 ppm/°C)

FAQ

What is the function of pins 4 and 5?

Pins 4 and 5 are labeled NIC (Not Internally Connected) and are not connected internally.

How does the device achieve high accuracy?

High accuracy is achieved through proprietary DigiTrim technology, which digitally trims the output voltage and temperature coefficient during final assembly.