ADR3433ARJZ-R2

Overview

The ADR3433ARJZ-R2 is a micropower, high-accuracy CMOS voltage reference with a fixed 3.3 V output. It features ±0.1% initial accuracy and an 8 ppm/°C maximum temperature coefficient over the −40°C to +125°C range. The device operates from a 3.5 V to 5.5 V supply, drawing a maximum of 100 μA quiescent current. It provides a 10 mA sourcing and 3 mA sinking output current capability with low dropout voltage. Noise performance includes 25 μV p-p (0.1 Hz to 10 Hz) and 46 μV rms (10 Hz to 10 kHz).

Feature Summary

• Utilizes proprietary DigiTrim technology for digital trimming of output voltage and temperature coefficient during final assembly.
• Features a dedicated ENABLE pin that allows for system power management by shutting down the device to 5 μA when driven below 0.7 V.
• Incorporates separate FORCE and SENSE pins for both ground and output voltage to enable 4-wire Kelvin connections for high-precision applications.

Applications

• Precision data acquisition systems
• Industrial instrumentation
• Medical devices
• Battery-powered devices

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm packaging details. Ensure the input voltage range meets the minimum requirement of 3.5 V for proper regulation. Confirm thermal constraints align with the specified junction temperature limits for the intended operating environment.

Selection Notes

Select this component when a stable 3.3 V reference is required in space-constrained designs utilizing the SOT-23 package. It is suitable for applications demanding low static current consumption and high long-term stability. Consider the minimum input voltage specification relative to the available supply rails before implementation.

Part Context

This part belongs to the ADR34xx family of micropower voltage references manufactured by Analog Devices Inc. The series offers various fixed output voltages ranging from 1.2 V to 5.0 V within the same compact footprint. All members share similar electrical characteristics, including low noise and high precision, tailored for different system voltage requirements.

Replacement Considerations

Other models within the ADR34xx family, such as the ADR3430 or ADR3440, may serve as alternatives if the output voltage requirement differs. Verify compatibility regarding input voltage ranges and pin configurations when substituting components.

FAQ

How does the ENABLE pin function?

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

What is the purpose of the FORCE and SENSE pins?

These pins allow for 4-wire Kelvin connections. They enable the user to connect directly to the load to eliminate voltage drops caused by trace resistance, ensuring higher output accuracy.