REF4132A30DBVRQ1

Overview

The REF4132A30DBVRQ1 is an automotive-grade series voltage reference from Texas Instruments, designed for high precision and low power consumption. It provides a fixed 3V output with an initial accuracy of ±0.05% and a maximum temperature coefficient of 12 ppm/°C (A grade). The device operates within a wide ambient temperature range of -40°C to +125°C and features a low quiescent current of 100 µA maximum. It supports an output current of ±10 mA and includes an enable pin for shutdown control. Packaged in a compact SOT-23-5 footprint, it offers excellent long-term stability and low noise performance suitable for demanding applications.

Feature Summary

• Qualified for automotive applications under AEC-Q100 standards
• Features low temperature drift and high initial accuracy
• Includes an enable pin for low-power shutdown mode
• Offers small footprint with enhanced specifications over legacy parts

Applications

• ADAS front camera systems
• Automotive DC/DC converters
• HEV/EV on-board chargers
• Traction inverters

Procurement Notes

Verify the specific suffix 'A' indicates the 12 ppm/°C temperature coefficient grade and '30' denotes the 3V output voltage. Confirm the 'Q1' suffix aligns with automotive qualification requirements. Ensure the DBVR package corresponds to the SOT-23-5 form factor required by your PCB layout. Cross-reference the datasheet revision history for any updates to electrical characteristics or ordering information before finalizing procurement.

Selection Notes

Select this component when designing systems requiring a stable, low-drift reference voltage in automotive environments. It serves as a pin-to-pin replacement for LM4128-Q1 and LM4132-Q1 devices while offering improved performance metrics. Consider its low quiescent current for battery-powered applications and its ability to source and sink load currents up to 10 mA. Ensure input voltage remains above the dropout threshold for optimal regulation across the full operating temperature range.

Part Context

This part belongs to the REF4132-Q1 family of low-drift, low-power CMOS voltage references. The family includes various output voltage options such as 2.5V, 3.3V, 4.096V, and 5V. The REF4132-Q1 is engineered to maintain signal integrity in noise-critical systems, making it suitable for interfacing with high-resolution data converters. Its design emphasizes stability and reliability for extended operational lifetimes in harsh conditions.

Replacement Considerations

The REF4132-Q1 is documented as an enhanced specification and pin-to-pin replacement for the LM4128-Q1 and LM4132-Q1. Designers transitioning from these legacy parts should verify that the improved noise and drift characteristics meet their system requirements without necessitating circuit modifications.

FAQ

How does the enable pin function affect power consumption?

Pulling the ENABLE pin low places the device in shutdown mode, reducing the quiescent current to less than 5 µA. Pulling it high activates the reference, resulting in a typical quiescent current of 75 µA.

What is the recommended capacitor configuration for stability?

TI recommends connecting a 0.1 µF ceramic bypass capacitor at both the VIN and VREF pins. An additional 1 µF to 10 µF capacitor can be added to the output to improve transient response, provided it does not excessively increase turn-on time.