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

Texas Instruments REF35250QDBVRQ1

Name: REF35250QDBVRQ1
Brand: Texas Instruments
SKU: REF35250QDBVRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: REF35250QDBVRQ1

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: SOT-23-6

Datasheet:: REF35250QDBVRQ1.pdf

Description:: AUTOMOTIVE, 650-NA QUIESCENT CUR

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Product details

Overview

REF35250QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to +125°C) ultra-low-power, high-precision series voltage reference delivering 2.5 V output with ±0.05 % initial accuracy, 15 ppm/°C max temperature coefficient, and 3.3 ppm_P-P (0.1 Hz–10 Hz) low-frequency noise. It supports ±5 mA sink/source, features EN and NR pins for power management and noise reduction, and targets precision sensor biasing and data converter reference in automotive ADAS subsystems.

For engineers reviewing the REF35250QDBVRQ1 datasheet, REF35250QDBVRQ1 pinout, REF35250QDBVRQ1 application, or REF35250QDBVRQ1 equivalent, key selection criteria include its 650 nA typical quiescent current, SOT-23-6 package footprint, 2.5 V fixed output with 10 mA sourcing capability, and automotive-grade qualification for front camera and battery control unit designs.

Technical Context

The REF35250QDBVRQ1 implements a precision bandgap core with buffered output and integrated enable logic, enabling stable 2.5 V reference generation across −40°C to +125°C ambient. Its architecture includes dedicated noise-reduction (NR) terminal and dropout-voltage-optimized regulation-achieving 250 mV max at 10 mA load-while maintaining sub-1 µA quiescent current.

It operates from input voltages as low as V_REF + V_DO (≥2.75 V at 10 mA) up to 6 V, supports shutdown via EN pin with ≤0.5 µA max shutdown current, and delivers 20 ppm/mA load regulation (source) and 350 ppm/mA (sink), ensuring stability under dynamic sensor or ADC load transients.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V fixed; enables direct interface with 12–16-bit SAR and delta-sigma ADCs requiring precise mid-scale reference.
Initial Accuracy	±0.05 % max at 25°C; reduces system calibration burden and improves absolute measurement repeatability.
Temp Coefficient	15 ppm/°C max (−40°C to +125°C); ensures <±188 ppm total drift over full automotive grade 1 range.
Quiescent Current	650 nA typical, 2.6 µA max (−40°C to +125°C); supports >10-year battery life in always-on vehicle modules.
Low-Frequency Noise	3.3 ppm_P-P (0.1 Hz–10 Hz) at 2.5 V; minimizes quantization uncertainty in high-resolution sensor signal chains.
Load Current	+10 mA / −5 mA; drives multiple precision op-amps or ADC reference inputs without external buffering.
Shutdown Current	≤0.5 µA max (−40°C to +125°C); enables ultra-low-power sleep modes in ECU and driver monitoring systems.

Pinout & Package

REF35250QDBVRQ1 is housed in a space-constrained 6-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density automotive PCB layouts and reflow-compatible assembly.

Pin/Terminal	Circuit Role	Design Meaning
GND (Pin 1 & 2)	Ground reference	Dual ground terminals reduce ground path impedance and improve PSRR; both must be connected to low-impedance system ground plane.
EN (Pin 3)	Enable control input	Logic-level input (0.3×VIN low / 0.7×VIN high); open-circuit = active; enables zero-current shutdown when pulled low.
VIN (Pin 4)	Input supply	Accepts 2.75 V to 6 V; dropout voltage as low as 120 mV at 5 mA allows operation from single-cell LiFePO₄ or regulated 3.3 V rails.
NR (Pin 5)	Noise reduction node	Connect external capacitor (1 µF typical) to GND to suppress 1/f noise; reduces 0.1–10 Hz output noise by up to 40 %.
VREF (Pin 6)	Precision output	Stable 2.5 V source with 30 ppm long-term drift (1k hr); requires 0.1–10 µF output capacitance (ESR ≤400 mΩ) for stability.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for −40°C to +125°C ambient operation; meets automotive reliability and stress-test requirements for safety-critical ECUs.
Ultra-low quiescent current	650 nA typical active current enables multi-year operation from coin cells or energy-harvesting sources in telematics sensors.
Integrated noise reduction (NR) pin	External capacitor on NR pin cuts 0.1–10 Hz noise by >30 %, directly improving effective resolution of 16-bit+ data converters.
Low dropout voltage	120 mV max at 5 mA load allows use with low-headroom supplies such as post-LDO 3.3 V rails or aging battery stacks.
High output drive capability	±5 mA sink/source supports driving multiple reference inputs (e.g., dual ADCs or PGA bias networks) without external buffers.

Applications

Automotive Front Camera	Driver Monitoring System
Use Scenario: Powering image sensor analog front-end and ADC reference in compact rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for CMOS image sensor biasing and 12–14-bit ADC conversion. Use Value: 15 ppm/°C tempco and 3.3 ppm_P-P noise ensure consistent exposure linearity and color fidelity across −40°C to +85°C vehicle cabin temperatures.	Use Scenario: Supplying precision reference to infrared (IR) LED driver and ambient light sensor ADC in cabin-facing driver attention systems. IC Role / Device Role / Timing Role: Delivers low-noise 2.5 V reference for optical sensor signal conditioning and eye-tracking algorithm accuracy. Use Value: 650 nA quiescent current extends module standby time; EN pin enables synchronized shutdown during vehicle sleep mode.
Battery Control Unit (BCU)	Electric Power Steering (EPS)
Use Scenario: Reference for cell voltage monitoring ADCs and temperature-sensing circuits in 12 V/48 V hybrid battery management systems. IC Role / Device Role / Timing Role: Supplies accurate 2.5 V reference to multi-channel SAR ADCs sampling pack voltage, current shunt, and thermistor networks. Use Value: ±0.05 % initial accuracy and 30 ppm long-term stability minimize SoC estimation drift over 10+ years of field operation.	Use Scenario: Biasing torque sensor amplifiers and providing reference for motor phase current sensing ADCs in EPS motor control units. IC Role / Device Role / Timing Role: Generates stable 2.5 V reference for precision instrumentation amplifiers and isolated sigma-delta modulators. Use Value: Dual GND pins and 164.4 °C/W R_θJA support thermal robustness in high-power EPS enclosures; NR pin lowers torque measurement noise floor.

Automotive Front Camera

Driver Monitoring System

Use Scenario: Powering image sensor analog front-end and ADC reference in compact rear-view or surround-view camera modules.

IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for CMOS image sensor biasing and 12–14-bit ADC conversion.

Use Value: 15 ppm/°C tempco and 3.3 ppm_P-P noise ensure consistent exposure linearity and color fidelity across −40°C to +85°C vehicle cabin temperatures.

Use Scenario: Supplying precision reference to infrared (IR) LED driver and ambient light sensor ADC in cabin-facing driver attention systems.

IC Role / Device Role / Timing Role: Delivers low-noise 2.5 V reference for optical sensor signal conditioning and eye-tracking algorithm accuracy.

Use Value: 650 nA quiescent current extends module standby time; EN pin enables synchronized shutdown during vehicle sleep mode.

Battery Control Unit (BCU)

Electric Power Steering (EPS)

Use Scenario: Reference for cell voltage monitoring ADCs and temperature-sensing circuits in 12 V/48 V hybrid battery management systems.

IC Role / Device Role / Timing Role: Supplies accurate 2.5 V reference to multi-channel SAR ADCs sampling pack voltage, current shunt, and thermistor networks.

Use Value: ±0.05 % initial accuracy and 30 ppm long-term stability minimize SoC estimation drift over 10+ years of field operation.

Use Scenario: Biasing torque sensor amplifiers and providing reference for motor phase current sensing ADCs in EPS motor control units.

IC Role / Device Role / Timing Role: Generates stable 2.5 V reference for precision instrumentation amplifiers and isolated sigma-delta modulators.

Use Value: Dual GND pins and 164.4 °C/W R_θJA support thermal robustness in high-power EPS enclosures; NR pin lowers torque measurement noise floor.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF3425QDBVRQ1	Higher quiescent current (3.5 µA typ), no NR pin, same 2.5 V output and AEC-Q100 Grade 1 rating.	Lacks noise-reduction capability; less suitable for ultra-low-noise ADC reference in camera or radar sensors.	Select REF3425QDBVRQ1 only if NR functionality is unnecessary and higher IQ is acceptable for cost-sensitive BCU designs.
MAX6070BAUT25+T	2.5 V output, ±0.04 % initial accuracy, but 20 ppm/°C tempco and 1.2 µA IQ; not AEC-Q100 qualified.	Not automotive-qualified; limited to industrial or consumer applications where extended temperature range is not required.	Choose MAX6070BAUT25+T for non-automotive precision instruments needing tighter initial accuracy but lower noise performance.

Compared with REF3425QDBVRQ1 and MAX6070BAUT25+T, REF35250QDBVRQ1 uniquely combines AEC-Q100 Grade 1 compliance, sub-µA IQ, NR pin for noise tailoring, and 15 ppm/°C tempco-making it the only option qualified for next-generation automotive vision and safety-critical sensor reference applications.

Availability

REF35250QDBVRQ1 is available at Aetrix Electronics and suitable for automotive front camera, battery control unit, and electric power steering applications requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant traceability.

Supply support for REF35250QDBVRQ1 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 leader specializing in analog, embedded processing, and automotive electronics, with decades of expertise in precision reference design and automotive qualification.

The REF35-Q1 product line was engineered specifically for ultra-low-power, high-accuracy voltage referencing in automotive ADAS, body electronics, and powertrain control units-prioritizing AEC-Q100 reliability, nanoscale current efficiency, and noise resilience.

FAQ

What is the maximum operating temperature range for REF35250QDBVRQ1?

REF35250QDBVRQ1 is fully specified from −40°C to +125°C ambient (AEC-Q100 Grade 1), with functional operation extending to −55°C. This makes REF35250QDBVRQ1 suitable for under-hood and cabin-mounted automotive modules where thermal extremes are common.

Does REF35250QDBVRQ1 require an external capacitor on the NR pin?

No, REF35250QDBVRQ1 operates stably without an NR capacitor, but adding a 1 µF ceramic capacitor between NR (Pin 5) and GND reduces 0.1–10 Hz noise by up to 40 %. The NR pin is optional-open-circuit operation yields 3.3 ppm_P-P noise; 1 µF lowers it to ~2.0 ppm_P-P.

What is the minimum input voltage required for REF35250QDBVRQ1 at 10 mA load?

At 10 mA load, REF35250QDBVRQ1 requires VIN ≥ V_REF + V_DO = 2.5 V + 250 mV = 2.75 V minimum. The datasheet specifies 250 mV max dropout at 10 mA, so REF35250QDBVRQ1 remains in regulation down to 2.75 V input under full load.

Can REF35250QDBVRQ1 sink current, and how much?

Yes, REF35250QDBVRQ1 can sink up to −5 mA while maintaining regulation and specified accuracy. This capability supports bidirectional reference applications such as precision current-source/sink DACs or active filter biasing where the reference node may draw current.

Is REF35250QDBVRQ1 pin-compatible with other REF35-Q1 variants?

Yes, all REF35-Q1 devices-including REF35120QDBVRQ1, REF35205QDBVRQ1, and REF35500QDBVRQ1-share identical SOT-23-6 (DBV) pinout and footprint. Only the output voltage differs; REF35250QDBVRQ1 provides 2.5 V, and swapping requires no PCB layout change.

REF35250QDBVRQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: SOT-23-6

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Reference Type:: Series

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 2.5V

Voltage - Output (Max):: -

Current - Output:: 10 mA

Tolerance:: ±0.05%

Temperature Coefficient:: 15ppm/°C

Noise - 0.1Hz to 10Hz:: 3.8ppmp-p

Noise - 10Hz to 10kHz:: 0.7ppmrms

Voltage - Input:: 2.75V ~ 6V

Current - Supply:: 2.9µA

Current - Cathode:: -

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-6

REF35250QDBVRQ1 FAQ

1.How can I place an order for REF35250QDBVRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for REF35250QDBVRQ1 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 REF35250QDBVRQ1 reliable?

The price and inventory of REF35250QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for REF35250QDBVRQ1 is usually 5 days.

3.What payment methods are accepted for REF35250QDBVRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for REF35250QDBVRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for REF35250QDBVRQ1?

REF35250QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your REF35250QDBVRQ1 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 REF35250QDBVRQ1?

For technical support, including REF35250QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your REF35250QDBVRQ1 requirements.

6.How does Aetrix verify that REF35250QDBVRQ1 is sourced from the original manufacturer or authorized distributors?

All REF35250QDBVRQ1 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 REF35250QDBVRQ1 meets industry standards.

7.What is the process for return or replacement of REF35250QDBVRQ1?

All REF35250QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with REF35250QDBVRQ1, 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 REF35250QDBVRQ1 part is unused and in its original packaging.

Return procedure for REF35250QDBVRQ1:

1.Submit a request within 90 days.

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

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