ADR3530WARMZ-R7

Overview

The ADR3530WARMZ-R7 is a micropower, high-precision CMOS series voltage reference with a nominal output of 3.0 V. It features an initial accuracy of ±0.1% and a maximum temperature coefficient of 8 ppm/°C (A grade). The device operates within an input voltage range of 3.2 V to 5.5 V and supports a sourcing current of up to 10 mA and sinking current of -3 mA. Quiescent current is typically 85 μA in normal operation and drops to 5 μA in shutdown mode. It includes an enable pin for power management and is qualified for automotive applications under AEC-Q100 standards.

Feature Summary

• Utilizes proprietary DigiTrim technology for digital trimming of initial accuracy 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 the device to enter a low-power shutdown state when driven below the threshold voltage.

Applications

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

Procurement Notes

Verify the specific grade (A or B) and output voltage tolerance against project requirements, as the datasheet specifies different temperature coefficients for each grade. Confirm the package suffix matches the required footprint, noting that the 'RM-8' indicates an 8-lead MSOP package. Ensure the ordering suffix corresponds to the desired reel or cut tape packaging format before finalizing procurement.

Selection Notes

Select this component when a stable 3.0 V reference is needed with low quiescent current consumption. Consider the dropout voltage specifications if operating near the minimum input voltage limit. Evaluate the thermal resistance and ambient temperature conditions to ensure power dissipation limits are not exceeded during high-load sourcing operations.

Part Context

This part belongs to the ADR35xx family of micropower voltage references from Analog Devices. The family includes variants with outputs ranging from 2.5 V to 5.0 V. All members share similar architectural benefits, including CMOS construction, low noise, and automotive qualification, differing primarily in their nominal output voltage and specific input voltage ranges.

Replacement Considerations

ADR3525WARMZ-R7

FAQ

What is the function of the ENABLE pin?

The ENABLE pin controls the operational state of the device. Driving it above VIN × 0.85 enables normal operation, while driving it below 0.7 V activates the shutdown mode, reducing quiescent current to 5 μA.

How does DigiTrim technology benefit this reference?

DigiTrim technology allows for the digital trimming of both initial accuracy and temperature coefficient during final assembly without interfering with each other, resulting in higher overall accuracy across the temperature range.