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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Reference

Texas Instruments REF4132A40DBVRQ1

Name: REF4132A40DBVRQ1
Brand: Texas Instruments
SKU: REF4132A40DBVRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: REF4132A40DBVRQ1

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: SC-74A, SOT-753

Datasheet:: REF4132A40DBVRQ1.pdf

Description:: IC VREF SERIES 0.05% SOT23-5

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Product details

Overview

REF4132A40DBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified precision series voltage reference delivering 4.096 V output with ±0.05% initial accuracy, 12 ppm/°C max temperature coefficient (A grade), and ±10 mA output current capability in a 5-pin SOT-23 package. It enables high-resolution ADC biasing in ADAS front camera and traction inverter control systems where low drift and low power are critical.

For engineers reviewing the REF4132A40DBVRQ1 datasheet, REF4132A40DBVRQ1 pinout, REF4132A40DBVRQ1 application, or REF4132A40DBVRQ1 equivalent, key selection criteria include dropout voltage ≤100 mV at zero load, quiescent current ≤100 µA over −40°C to +125°C, 15 µV_PP (0.1–10 Hz) noise performance, and enable-controlled shutdown with <5 µA standby current.

Technical Context

The REF4132A40DBVRQ1 implements a CMOS-based bandgap core with integrated output buffer and enable logic, supporting active and shutdown modes via a dedicated EN pin. Its architecture delivers low thermal hysteresis (35 ppm) and excellent long-term stability (30 ppm/1000 hrs), making it suitable for safety-critical automotive subsystems requiring repeatable reference accuracy across temperature cycling.

It operates from VIN ≥ VREF + VDO (min 50 mV), supports capacitive loads from 0.1 µF to 10 µF, and maintains specified performance with input supply rejection >60 dB up to 10 kHz. The device is not intended for shunt operation and requires no external resistors for basic functionality.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	4.096 V ±0.05% - Enables precise 12-bit+ ADC full-scale calibration without trimming.
Temp Coefficient	12 ppm/°C max (A grade) - Limits output drift to ≤1.05 mV over −40°C to +125°C ambient range.
Quiescent Current	≤100 µA max - Supports always-on sensor nodes and battery-backed modules with minimal standby drain.
Dropout Voltage	100 mV max at 0 mA load - Allows operation from 4.196 V supply, easing LDO selection in 5 V rail systems.
Output Noise	15 µV_PP (0.1–10 Hz) - Preserves SNR in 24-bit delta-sigma converters like ADS1259-Q1.
Enable Threshold	EN high ≥1.6 V, low ≤0.5 V - Compatible with standard 3.3 V/5 V GPIO without level-shifting.
Short-Circuit Current	18 mA typical - Provides inherent fault protection without external current limiting.

Pinout & Package

SOT-23-5 (DBV) package: 2.90 mm × 1.60 mm body size, surface-mount, lead-free, RoHS-compliant.

Pin/Terminal	Circuit Role	Design Meaning
1 - N/C	No-connect	Must be left floating; internal connection absent - no routing or grounding permitted.
2 - GND	Ground reference	Primary return path for reference core and buffer; requires low-impedance connection to system analog ground plane.
3 - EN	Enable control input	Digital logic interface: high = active mode (100 µA IQ), low = shutdown (<5 µA IQ); must avoid 0.5–1.6 V indeterminate zone.
4 - VIN	Input supply	Power input with dropout as low as 50 mV; bypass with 0.1 µF ceramic capacitor placed adjacent to pin.
5 - VREF	Precision output	Stable 4.096 V source capable of sourcing/sinking ±10 mA; requires 0.1 µF ceramic capacitor directly at pin for stability.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for −40°C to +125°C ambient operation in automotive ECU environments including ADAS and traction inverters.
Low 1/f noise	15 µV_PP (0.1–10 Hz) enables direct coupling to high-resolution SAR and delta-sigma ADCs without additional filtering.
Pin-to-pin replacement	Direct drop-in for LM4128-Q1 and LM4132-Q1 in existing SOT-23-5 layouts - no PCB revision required.
Thermal hysteresis control	35 ppm max after −40°C ↔ +125°C cycling - ensures repeatability in thermally stressed automotive applications.
Shutdown current	2.5 µA typical in EN = low state - extends battery life in intermittent-sampling systems such as OBD-II monitors.

Applications

ADAS Front Camera	Automotive DC/DC Converter
Use Scenario: High-speed image sensor biasing and ADC reference in 8 MP camera modules operating at 60 fps under hood temperatures. IC Role / Device Role / Timing Role: Precision 4.096 V reference for 14-bit pipeline ADCs (e.g., ADS7049-Q1), providing stable full-scale voltage independent of input rail variation. Use Value: 12 ppm/°C drift ensures <±0.5 LSB error over full automotive temperature range, maintaining color fidelity and dynamic range.	Use Scenario: Feedback voltage reference for isolated flyback or forward converter controllers in 12 V → 3.3 V/5 V automotive auxiliary supplies. IC Role / Device Role / Timing Role: Stable reference for optocoupler feedback loop compensation, replacing less accurate Zener-based solutions. Use Value: ±0.05% initial accuracy and low load regulation (20 ppm/mA) minimize output voltage tolerance stack-up, improving load regulation to ±0.5%.
Traction Inverter Control	HEV/EV On-board Charger (OBC)
Use Scenario: Current-sense amplifier reference in three-phase motor phase current measurement using shunt resistors and isolated amplifiers. IC Role / Device Role / Timing Role: Dual-rail reference source (with OPA735) generating matched ±2.5 V for bidirectional current sensing in IGBT gate drivers. Use Value: Matched tempcos between REF4132A40DBVRQ1 and OPA735 reduce common-mode drift, enabling <0.1% current measurement accuracy.	Use Scenario: Reference for digital isolator feedback and microcontroller ADC monitoring of AC input voltage, DC bus voltage, and battery pack cell voltages. IC Role / Device Role / Timing Role: Primary voltage reference for system-level health monitoring in 6.6 kW OBC units with CAN FD communication and functional safety compliance. Use Value: AEC-Q100 qualification and 30 ppm/1000 hrs long-term stability support ASIL-B diagnostic coverage requirements per ISO 26262.

ADAS Front Camera

Automotive DC/DC Converter

Use Scenario: High-speed image sensor biasing and ADC reference in 8 MP camera modules operating at 60 fps under hood temperatures.

IC Role / Device Role / Timing Role: Precision 4.096 V reference for 14-bit pipeline ADCs (e.g., ADS7049-Q1), providing stable full-scale voltage independent of input rail variation.

Use Value: 12 ppm/°C drift ensures <±0.5 LSB error over full automotive temperature range, maintaining color fidelity and dynamic range.

Use Scenario: Feedback voltage reference for isolated flyback or forward converter controllers in 12 V → 3.3 V/5 V automotive auxiliary supplies.

IC Role / Device Role / Timing Role: Stable reference for optocoupler feedback loop compensation, replacing less accurate Zener-based solutions.

Use Value: ±0.05% initial accuracy and low load regulation (20 ppm/mA) minimize output voltage tolerance stack-up, improving load regulation to ±0.5%.

Traction Inverter Control

HEV/EV On-board Charger (OBC)

Use Scenario: Current-sense amplifier reference in three-phase motor phase current measurement using shunt resistors and isolated amplifiers.

IC Role / Device Role / Timing Role: Dual-rail reference source (with OPA735) generating matched ±2.5 V for bidirectional current sensing in IGBT gate drivers.

Use Value: Matched tempcos between REF4132A40DBVRQ1 and OPA735 reduce common-mode drift, enabling <0.1% current measurement accuracy.

Use Scenario: Reference for digital isolator feedback and microcontroller ADC monitoring of AC input voltage, DC bus voltage, and battery pack cell voltages.

IC Role / Device Role / Timing Role: Primary voltage reference for system-level health monitoring in 6.6 kW OBC units with CAN FD communication and functional safety compliance.

Use Value: AEC-Q100 qualification and 30 ppm/1000 hrs long-term stability support ASIL-B diagnostic coverage requirements per ISO 26262.

Equivalent & Alternatives

The following parts are listed as comparable options for similar precision voltage reference applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM4132AQME-4.1/NOPB	Same 4.096 V output, but 30 ppm/°C max (B grade), higher 150 µA IQ, no enable pin.	Lacks shutdown capability; less suitable for duty-cycled systems; requires external enable circuitry for power gating.	Choose when cost sensitivity outweighs need for ultra-low drift or enable control.
MAX6070BAUT41+	4.096 V output, ±0.04% initial accuracy, 10 ppm/°C max, but only qualified to industrial grade (−40°C to +85°C).	Not AEC-Q100 qualified; unsuitable for under-hood or safety-critical ADAS/propulsion systems.	Acceptable for infotainment or cabin electronics where automotive qualification is not mandated.

Compared with LM4132AQME-4.1/NOPB and MAX6070BAUT41+, REF4132A40DBVRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 12 ppm/°C drift, enable functionality, and SOT-23-5 footprint - making it the only option meeting full ASIL-B reference stability requirements in traction inverter and front camera ECUs.

Availability

REF4132A40DBVRQ1 is available at Aetrix Electronics and suitable for ADAS front camera, traction inverter, and HEV/EV on-board charger applications requiring stable component supply across extended automotive temperature ranges and long production lifecycles.

Supply support for REF4132A40DBVRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company designing analog ICs, embedded processors, and system solutions for automotive, industrial, and personal electronics markets.

The REF4132-Q1 product line delivers automotive-grade precision voltage references optimized for ADAS, electrification, and chassis control systems where low drift, low power, and functional safety compliance are mandatory.

FAQ

What is the maximum allowable input voltage for REF4132A40DBVRQ1?

The absolute maximum input voltage for REF4132A40DBVRQ1 is 6 V, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage. For reliable function, VIN must remain within the recommended range of VREF + VDO (min 50 mV) to 5.5 V, ensuring dropout compliance and thermal safety across temperature.

Does REF4132A40DBVRQ1 support negative reference generation?

REF4132A40DBVRQ1 itself provides only a positive 4.096 V reference output. However, it can be used with an op amp such as OPA735 in an inverting configuration to generate a matched negative reference - as shown in Figure 27 of the datasheet - enabling dual-supply data acquisition systems without separate negative references.

Can REF4132A40DBVRQ1 drive a 10 µF output capacitor?

Yes, REF4132A40DBVRQ1 is explicitly characterized for stable operation with output capacitors from 0.1 µF to 10 µF. A 10 µF ceramic or electrolytic capacitor improves load transient response but increases turn-on time to ~2.5 ms (0.1% settling); use 0.1 µF X7R ceramic for fastest startup and best high-frequency noise suppression.

What is the minimum enable voltage to activate REF4132A40DBVRQ1?

The minimum enable voltage to guarantee active mode operation for REF4132A40DBVRQ1 is 1.6 V, per the Electrical Characteristics table. Below 0.5 V, the device enters shutdown mode. Voltages between 0.5 V and 1.6 V cause undefined behavior and elevated quiescent current - avoid this indeterminate region in system design.

Is REF4132A40DBVRQ1 compatible with lead-free reflow soldering?

Yes, REF4132A40DBVRQ1 is qualified for lead-free reflow per JEDEC J-STD-020. Typical solder heat shift is <0.01%, though exposure to multiple reflows (e.g., double-sided PCB assembly) may increase drift; TI recommends placing REF4132A40DBVRQ1 in the second reflow pass to minimize cumulative thermal stress.

REF4132A40DBVRQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: SC-74A, SOT-753

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Reference Type:: Series

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 4.096V

Voltage - Output (Max):: -

Current - Output:: 10 mA

Tolerance:: ±0.05%

Temperature Coefficient:: 12ppm/°C

Noise - 0.1Hz to 10Hz:: 15µVp-p

Noise - 10Hz to 10kHz:: 24µVrms

Voltage - Input:: 4.05V ~ 5.5V

Current - Supply:: 100µA

Current - Cathode:: -

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-5

REF4132A40DBVRQ1 FAQ

1.How can I place an order for REF4132A40DBVRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for REF4132A40DBVRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for REF4132A40DBVRQ1 reliable?

The price and inventory of REF4132A40DBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF4132A40DBVRQ1 is usually 5 days.

3.What payment methods are accepted for REF4132A40DBVRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF4132A40DBVRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for REF4132A40DBVRQ1?

REF4132A40DBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your REF4132A40DBVRQ1 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for REF4132A40DBVRQ1?

For technical support, including REF4132A40DBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF4132A40DBVRQ1 requirements.

6.How does Aetrix verify that REF4132A40DBVRQ1 is sourced from the original manufacturer or authorized distributors?

All REF4132A40DBVRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that REF4132A40DBVRQ1 meets industry standards.

7.What is the process for return or replacement of REF4132A40DBVRQ1?

All REF4132A40DBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF4132A40DBVRQ1, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The REF4132A40DBVRQ1 part is unused and in its original packaging.

Return procedure for REF4132A40DBVRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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