REF4132A50DBVRQ1

Overview

The REF4132A50DBVRQ1 is an automotive-grade series voltage reference from Texas Instruments, designed for high precision and low power consumption. It provides a fixed 5 V 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 supports an output current of ±10 mA. Key electrical characteristics include a maximum quiescent current of 100 μA in active mode and 5 μA in shutdown mode. It features low output noise of 15 µVp-p (0.1 Hz to 10 Hz) and excellent long-term stability of 30 ppm/1000 hrs. The component is housed in a compact 5-pin SOT-23 package.

Feature Summary

• AEC-Q100 qualified for automotive applications with Device Temperature Grade 1 (-40°C to +125°C)
• High precision bandgap topology offering ±0.05% initial accuracy and 12 ppm/°C temperature drift
• Low-power operation with 100 μA maximum quiescent current and dedicated enable pin for shutdown mode
• Integrated short-circuit protection and low output voltage hysteresis for enhanced system reliability

Applications

• ADAS front camera systems
• Automotive DC/DC converters
• HEV/EV On-board Chargers (OBC) and wireless chargers
• Traction inverters
• Data acquisition systems with companion ADCs such as ADS1259-Q1 or ADS7049-Q1

Procurement Notes

Verify the specific suffix 'A50' confirms the 5 V output voltage and 'A' grade indicates the 12 ppm/°C temperature coefficient. Ensure the 'Q1' designation matches your requirement for AEC-Q100 automotive qualification. Confirm the DBVR package corresponds to the SOT-23-5 form factor required for your PCB layout constraints before finalizing procurement.

Selection Notes

Select this component when a fixed 5 V reference is required for noise-sensitive automotive data acquisition circuits. It serves as a direct pin-to-pin replacement for LM4128-Q1 and LM4132-Q1 devices. Consider its low dropout voltage and small footprint for space-constrained designs. Evaluate the 100 μA quiescent current against battery life requirements if used in portable applications.

Part Context

This part belongs to the REF4132-Q1 family of low-drift, low-power CMOS voltage references. The family includes variants with different output voltages (2.5 V, 3 V, 3.3 V, 4.096 V) and temperature coefficients (A grade: 12 ppm/°C, B grade: 30 ppm/°C). All members share the same SOT-23-5 package and functional architecture, differing primarily in their calibrated output voltage and drift specifications.

Replacement Considerations

The datasheet explicitly identifies the REF4132-Q1 as a pin-to-pin replacement for LM4128-Q1 and LM4132-Q1. Verify that the legacy parts meet the same AEC-Q100 qualification standards and thermal performance requirements for your specific application environment.