REF4132B40DBVRQ1

Overview

The REF4132B40DBVRQ1 is an automotive-grade series voltage reference from Texas Instruments, qualified under AEC-Q100 standards. It provides a fixed 4.096 V output with ±0.05% initial accuracy and a maximum temperature coefficient of 30 ppm/°C for the B grade. The device operates within a -40°C to +125°C ambient range, drawing a maximum quiescent current of 100 μA in active mode. It supports ±10 mA load current and features low output noise of 15 µVp-p (0.1 Hz to 10 Hz). Packaged in a compact SOT-23-5 footprint, it includes an enable pin for power management.

Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 specifications
• Low-power operation with shutdown mode reducing current consumption below 5 μA
• High precision with ±0.05% initial accuracy and low long-term stability drift
• Integrated enable control for system power management

Applications

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

Procurement Notes

Verify that the specific suffix 'B' corresponds to the 30 ppm/°C temperature coefficient grade as defined in the official datasheet. Confirm the '40' indicates the 4.096 V output voltage option. Ensure the 'Q1' suffix denotes automotive qualification status. Cross-reference the DBVR package code with the manufacturer's orderable addendum to confirm the SOT-23-5 physical dimensions and marking information.

Selection Notes

Select this component when designing for automotive environments requiring high precision voltage references. The B grade offers a balance between cost and performance for applications tolerant of 30 ppm/°C drift. Consider the 4.096 V output specifically for interfacing with ADCs utilizing standard reference levels. Evaluate the 100 μA quiescent current against battery life requirements in portable or always-on automotive modules.

Part Context

This part belongs to the REF4132-Q1 family of low-drift, low-power CMOS voltage references. It serves as a pin-to-pin replacement for legacy parts like the LM4128-Q1 and LM4132-Q1. The family shares common electrical characteristics and thermal profiles, differing primarily in output voltage options and temperature coefficient grades.

Replacement Considerations

Officially documented pin-compatible replacements include REF4132A40DBVRQ1 for lower drift applications and LM4132-Q1 for legacy system upgrades. Verify thermal resistance and dropout voltage similarities before substitution.