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

Texas Instruments TL4050B25QDBZRQ1

Name: TL4050B25QDBZRQ1
Brand: Texas Instruments
SKU: TL4050B25QDBZRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TL4050B25QDBZRQ1

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: TL4050B25QDBZRQ1.pdf

Description:: IC VREF SHUNT 0.2% SOT23-3

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Product details

Overview

TL4050B25QDBZRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference delivering a fixed 2.5 V output with ±0.2% initial tolerance, 50 ppm/°C temperature coefficient, and 41 μV_RMS wideband noise across –40°C to +125°C. It operates from 60 μA to 15 mA cathode current and requires no output capacitor, making it ideal for automotive sensor signal conditioning and high-accuracy ADC biasing in engine control units.

For engineers reviewing the TL4050B25QDBZRQ1 datasheet, TL4050B25QDBZRQ1 pinout, TL4050B25QDBZRQ1 application, or TL4050B25QDBZRQ1 equivalent, key selection criteria include its SOT-23-3 package compatibility with space-constrained automotive PCBs, guaranteed stability under all capacitive loads, and verified performance over extended temperature range without derating.

Technical Context

The TL4050B25QDBZRQ1 implements a two-terminal shunt topology with low dynamic impedance (0.3 Ω at 1 mA) and thermal hysteresis of only 0.7 mV after cycling between –40°C and +125°C. Its internal bandgap core achieves long-term stability of 120 ppm over 1000 hours at 25°C.

Designed for operation with cathode currents as low as 41 μA (typical), it maintains regulation across a 15 mA maximum cathode current while exhibiting minimal voltage drift-0.3–0.8 mV variation over I_Z = 60 μA to 1 mA and ≤8 mV over 1–15 mA-enabling robust use in battery-powered telematics modules and power-supply monitor circuits.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	2.5 V nominal; enables direct interface with 2.5 V ADC references and rail-to-rail op-amp stages.
Initial Tolerance	±0.2% max at 25°C; ensures <10 mV absolute error in safety-critical voltage monitoring applications.
Temp Coefficient	±50 ppm/°C max over –40°C to +125°C; contributes ≤1.25 mV drift across full automotive temperature range.
Output Noise	41 μV_RMS (10 Hz–10 kHz); supports 16-bit resolution in data-acquisition systems without external filtering.
Cathode Current Range	41 μA min to 15 mA max; allows design flexibility from ultra-low-power wake-up circuits to high-current reference buffers.
Dynamic Impedance	0.3 Ω at 1 mA, 120 Hz; provides stable regulation despite load transients in ECU power management ICs.
Long-Term Stability	120 ppm over 1000 h; reduces calibration drift in infotainment system audio DACs and battery gauging circuits.

Pinout & Package

SOT-23-3 package (DBZ), 1.12 mm max height, JEDEC TO-236 compliant, with gull-wing leads and pin 1 index area marked on top surface.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Reference output node	Connects to load and external current-setting resistor; sinks total cathode current (I_Z + I_L) in shunt configuration.
Anode (Pin 2)	Ground reference terminal	Common return path for cathode current; must be tied to system ground or low-impedance analog ground plane.
No-Connect (Pin 3)	Unused terminal	Internally floating; may be left unconnected or tied to Pin 2 in high-EMI environments per TI recommendation.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for automotive use from –40°C to +125°C ambient, supporting ASIL-B functional safety architectures.
No output capacitor required	Stable with any capacitive load up to 100 nF, eliminating BOM cost and board space for bypass caps in compact ECUs.
Low 41 μV_RMS noise	Enables high-SNR signal chains in automotive radar front-ends and precision current-sense amplifiers.
Wide 60 μA–15 mA operating range	Supports both microamp-level sleep-mode references and milliamp-level active-system biasing without redesign.
0.7 mV thermal hysteresis	Minimizes repeatability error in cyclic temperature environments such as under-hood power converters.

Applications

Automotive Engine Control Unit (ECU)	Data-Acquisition Systems
Use Scenario: Provides stable 2.5 V reference for oxygen sensor signal conditioning and knock sensor ADC sampling in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference supplying precision bias to instrumentation amplifiers and SAR ADCs. Use Value: Maintains ±0.2% accuracy over –40°C to +125°C, ensuring consistent air-fuel ratio calculation across extreme ambient conditions.	Use Scenario: Serves as reference for 16-bit ADCs in portable test equipment measuring vibration, pressure, and temperature. IC Role / Device Role / Timing Role: Two-terminal shunt reference enabling single-supply, low-noise analog front-end design. Use Value: 41 μV_RMS noise and 0.3 Ω dynamic impedance preserve ENOB in battery-operated handheld meters.
Power-Supply Monitors	Battery-Powered Equipment
Use Scenario: Monitors 12 V vehicle battery voltage via resistive divider, feeding scaled signal into MCU ADC with known reference. IC Role / Device Role / Timing Role: Precision shunt reference establishing absolute measurement baseline for supply rail health checks. Use Value: ±50 ppm/°C tempco ensures <±15 mV error over full temperature range, critical for accurate low-battery detection.	Use Scenario: Powers reference input of fuel gauge ICs and battery protection controllers in 12 V automotive accessories. IC Role / Device Role / Timing Role: Micropower shunt reference drawing only 60 μA typical, extending shelf life of backup power systems. Use Value: Minimum 41 μA cathode current enables operation with high-value current-setting resistors, reducing quiescent power in always-on modules.

Automotive Engine Control Unit (ECU)

Data-Acquisition Systems

Use Scenario: Provides stable 2.5 V reference for oxygen sensor signal conditioning and knock sensor ADC sampling in gasoline/diesel ECUs.

IC Role / Device Role / Timing Role: Shunt voltage reference supplying precision bias to instrumentation amplifiers and SAR ADCs.

Use Value: Maintains ±0.2% accuracy over –40°C to +125°C, ensuring consistent air-fuel ratio calculation across extreme ambient conditions.

Use Scenario: Serves as reference for 16-bit ADCs in portable test equipment measuring vibration, pressure, and temperature.

IC Role / Device Role / Timing Role: Two-terminal shunt reference enabling single-supply, low-noise analog front-end design.

Use Value: 41 μV_RMS noise and 0.3 Ω dynamic impedance preserve ENOB in battery-operated handheld meters.

Power-Supply Monitors

Battery-Powered Equipment

Use Scenario: Monitors 12 V vehicle battery voltage via resistive divider, feeding scaled signal into MCU ADC with known reference.

IC Role / Device Role / Timing Role: Precision shunt reference establishing absolute measurement baseline for supply rail health checks.

Use Value: ±50 ppm/°C tempco ensures <±15 mV error over full temperature range, critical for accurate low-battery detection.

Use Scenario: Powers reference input of fuel gauge ICs and battery protection controllers in 12 V automotive accessories.

IC Role / Device Role / Timing Role: Micropower shunt reference drawing only 60 μA typical, extending shelf life of backup power systems.

Use Value: Minimum 41 μA cathode current enables operation with high-value current-setting resistors, reducing quiescent power in always-on modules.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF3025AIDBZR	2.5 V, ±0.2%, 50 ppm/°C, but higher 50 μV_RMS noise and 100 μA min cathode current.	Less suitable for ultra-low-power wake-up circuits due to higher minimum operating current.	Prefer TL4050B25QDBZRQ1 where <60 μA operation or automotive qualification is required.
MAX6025AEUR+T	2.5 V, ±0.15%, 25 ppm/°C, but not AEC-Q100 qualified and rated only to +85°C.	Not approved for under-hood automotive deployment; limited to industrial or consumer-grade systems.	Choose TL4050B25QDBZRQ1 for production automotive designs requiring Grade 1 temperature rating and functional safety compliance.

Compared with REF3025AIDBZR and MAX6025AEUR+T, the TL4050B25QDBZRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 60 μA minimum cathode current, and proven stability across –40°C to +125°C-making it the only option qualified for direct integration into ASIL-B automotive subsystems without additional qualification overhead.

Availability

TL4050B25QDBZRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, battery-powered diagnostic tools, and precision power-supply monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL4050B25QDBZRQ1 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 experience in high-reliability reference design.

The TL4050-Q1 product line delivers AEC-Q100 qualified shunt voltage references optimized for automotive signal conditioning, battery monitoring, and precision data acquisition where extended temperature operation and long-term stability are mandatory.

FAQ

What is the operating temperature range of the TL4050B25QDBZRQ1?

The TL4050B25QDBZRQ1 is rated for operation from –40°C to +125°C ambient temperature and is AEC-Q100 Grade 1 qualified. This specification is validated across the full range with no derating required, making TL4050B25QDBZRQ1 suitable for under-hood automotive applications including engine control modules and transmission control units.

Does the TL4050B25QDBZRQ1 require an output capacitor for stability?

No, the TL4050B25QDBZRQ1 does not require an output capacitor for stability. Its two-terminal shunt architecture is inherently stable with all capacitive loads, including up to 100 nF, as confirmed in TI's datasheet Section 7.1. This eliminates the need for external bypass components in TL4050B25QDBZRQ1-based designs, reducing BOM count and PCB area.

What is the minimum cathode current needed for regulation in the TL4050B25QDBZRQ1?

The TL4050B25QDBZRQ1 requires a minimum cathode current of 41 μA (typical) at 25°C to maintain regulation, with a maximum of 65 μA across the full –40°C to +125°C range. This low minimum current enables TL4050B25QDBZRQ1 use in ultra-low-power automotive subsystems such as always-on CAN wake-up receivers and battery leakage monitors.

How does the TL4050B25QDBZRQ1 compare to the TL4050A25QDBZRQ1 in terms of accuracy?

The TL4050B25QDBZRQ1 has a maximum initial tolerance of ±0.2% at 25°C, whereas the TL4050A25QDBZRQ1 offers tighter ±0.1%. Both share identical 50 ppm/°C temperature coefficient and 41 μV_RMS noise. The TL4050B25QDBZRQ1 provides optimal cost-performance balance for applications where ±0.2% meets system-level accuracy requirements, such as non-safety-critical sensor interfaces.

Is the TL4050B25QDBZRQ1 pin-compatible with other members of the TL4050-Q1 family?

Yes, the TL4050B25QDBZRQ1 in SOT-23-3 (DBZ) package shares identical pinout and footprint with all other TL4050x25-Q1 variants-including TL4050A25QDBZRQ1 and TL4050C25QDBZRQ1-as well as TL4050x20-Q1, TL4050x41-Q1, and TL4050x50-Q1 in the same DBZ package. This enables drop-in voltage reference upgrades without PCB layout changes.

TL4050B25QDBZRQ1 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: TO-236-3, SC-59, SOT-23-3

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Reference Type:: Shunt

Output Type:: Fixed

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

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.2%

Temperature Coefficient:: 50ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 41µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 65 µA

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

TL4050B25QDBZRQ1 FAQ

1.How can I place an order for TL4050B25QDBZRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TL4050B25QDBZRQ1 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 TL4050B25QDBZRQ1 reliable?

The price and inventory of TL4050B25QDBZRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B25QDBZRQ1 is usually 5 days.

3.What payment methods are accepted for TL4050B25QDBZRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B25QDBZRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TL4050B25QDBZRQ1?

TL4050B25QDBZRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TL4050B25QDBZRQ1 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 TL4050B25QDBZRQ1?

For technical support, including TL4050B25QDBZRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B25QDBZRQ1 requirements.

6.How does Aetrix verify that TL4050B25QDBZRQ1 is sourced from the original manufacturer or authorized distributors?

All TL4050B25QDBZRQ1 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 TL4050B25QDBZRQ1 meets industry standards.

7.What is the process for return or replacement of TL4050B25QDBZRQ1?

All TL4050B25QDBZRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B25QDBZRQ1, 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 TL4050B25QDBZRQ1 part is unused and in its original packaging.

Return procedure for TL4050B25QDBZRQ1:

1.Submit a request within 90 days.

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

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