ADR3540WBRMZ-R7

Overview

The ADR3540WBRMZ-R7 is a micropower, high-precision CMOS voltage reference with a nominal output of 4.096 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 4.3 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 under AEC-Q100 standards.

Feature Summary

• Utilizes proprietary DigiTrim technology for digital trimming of output voltage and temperature coefficient during final assembly.
• Features low long-term drift and low output voltage hysteresis to improve lifetime system accuracy.
• Includes an enable pin that allows for shutdown mode with reduced quiescent current consumption.

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 automated placement is required. Ensure the MSOP-8 package dimensions match the target PCB footprint. Validate that the 4.3 V minimum input voltage aligns with the system supply rails.

Selection Notes

Select this part when a 4.096 V precision reference is needed with strict temperature stability requirements in automotive or industrial environments. Compare against A-grade variants if a higher temperature coefficient is acceptable for cost reduction. Consider the 10 mA sourcing capability for direct drive applications without additional buffering.

Part Context

This component belongs to the ADR35xx series of micropower voltage references manufactured by Analog Devices. The series includes models with outputs ranging from 2.5 V to 5.0 V, all sharing similar architectural features such as CMOS construction and DigiTrim calibration. The WBRMZ designation specifies the B-grade performance level and the MSOP-8 surface-mount package.

Replacement Considerations

ADR3540WARMZ-R7

FAQ

What is the typical long-term output voltage drift for this device?

The typical long-term output voltage drift is 30 ppm after 1000 hours of continuous operation at 50°C.

How does the enable pin function affect power consumption?

When the enable pin is pulled below 0.7 V, the device enters shutdown mode, reducing the quiescent current to 5 μA.