ADR3512WCRMZ-R7

Overview

The ADR3512WCRMZ-R7 is a micropower, high-accuracy CMOS voltage reference with a fixed output of 1.2 V. It operates within an input voltage range of 2.3 V to 5.5 V and supports sourcing up to 10 mA and sinking up to 3 mA. The device features a maximum temperature coefficient of 4 ppm/°C from −40°C to +85°C and 8 ppm/°C across the full −40°C to +125°C automotive range. Initial output voltage error is ±0.1%, with quiescent current at 100 µA maximum. Noise is 8 µV p-p (0.1 Hz to 10 Hz). It utilizes DigiTrim technology for digital trimming and includes an enable pin for shutdown mode.

Feature Summary

• Digital trimming via patented DigiTrim technology ensures high initial accuracy and low temperature coefficient.
• Low long-term drift and low output voltage hysteresis improve lifetime system accuracy.
• Integrated enable pin allows switching to a low power shutdown mode with supply current below 5 µA.

Applications

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

Procurement Notes

Verify the specific ordering suffix WCRMZ-R7 against the manufacturer's official documentation to confirm the package type, temperature grade, and packing quantity. Ensure compatibility with automotive quality requirements if applicable. Confirm RoHS compliance status through the datasheet specifications before procurement.

Selection Notes

Select this component when a stable 1.2 V reference is required in space-constrained designs using an 8-lead MSOP package. Consider its low dropout voltage and high source current capability for applications requiring direct drive without external buffering. Evaluate the thermal resistance and power dissipation limits for high ambient temperature environments.

Part Context

This part belongs to the ADR3512 series of micropower voltage references manufactured by Analog Devices Inc. It is specifically designated as an automotive-grade product, indicated by the 'W' suffix, ensuring reliability under strict automotive standards. The series leverages CMOS processes to achieve precision performance with minimal power consumption.

Replacement Considerations

Consult the manufacturer's selection guide for alternative models within the same family that offer different output voltages or temperature coefficients. Verify pinout compatibility and electrical specifications before substituting with other voltage reference components.

FAQ

How does the ADR3512 handle thermally induced output voltage hysteresis?

The device exhibits low thermally induced output voltage hysteresis, which represents the change in output voltage after exposure to a specified temperature cycle, helping to maintain accuracy over varying thermal conditions.

What is the function of the ENABLE pin?

The ENABLE pin controls the operational state of the reference. Applying a voltage of 0.7 V or lower switches the device to a low power shutdown mode, while a voltage of 0.85 × VIN or higher enables normal operation.