REF4132B33DBVRQ1

Overview

The REF4132B33DBVRQ1 is an automotive-grade series voltage reference from Texas Instruments, offering a fixed 3.3 V output with ±0.05% initial accuracy and a maximum temperature coefficient of 30 ppm/°C (B grade). It operates within a –40°C to +125°C range, drawing a maximum quiescent current of 100 μA in active mode and 5 μA in shutdown. The device provides ±10 mA load current capability, features low 1/f noise of 15 µVp-p/V, and includes an enable pin for power management.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for reliability
• Integrated enable pin allows switching between active operation and ultra-low-power shutdown modes
• Low dropout voltage design enables efficient operation with minimal supply headroom
• High precision maintained through low long-term drift and excellent thermal hysteresis performance

Applications

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

Procurement Notes

Verify the specific B grade designation confirms the 30 ppm/°C temperature coefficient requirement. Ensure the DBVRQ1 suffix matches the required SOT-23-5 package and automotive quality level. Confirm that the 3.3 V output aligns with system voltage requirements before finalizing procurement specifications.

Selection Notes

Select this component when a stable 3.3 V reference is needed for high-precision automotive data acquisition. The B grade offers a balance of cost and performance suitable for applications where 30 ppm/°C drift is acceptable. Consider the enable feature if system power consumption must be minimized during inactive periods.

Part Context

This part belongs to the REF4132-Q1 family of low-drift, low-power CMOS voltage references. It serves as a direct pin-to-pin replacement for legacy parts like the LM4128-Q1 and LM4132-Q1 while providing enhanced stability and lower noise characteristics for modern automotive electronic control units.

Replacement Considerations

The REF4132-Q1 is documented as a pin-compatible replacement for the LM4128-Q1 and LM4132-Q1. Verify that the original part's electrical parameters fall within the REF4132-Q1 specifications to ensure functional equivalence without circuit redesign.

FAQ

How does the enable pin affect power consumption?

Pulling the enable pin low switches the device to shutdown mode, reducing quiescent current to a maximum of 5 μA compared to 100 μA in active mode.

What is the difference between A and B grades?

The A grade has a maximum temperature coefficient of 12 ppm/°C, while the B grade specified in this model has a maximum temperature coefficient of 30 ppm/°C.