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

Texas Instruments TL4050B41QDBZRQ1

Name: TL4050B41QDBZRQ1
Brand: Texas Instruments
SKU: TL4050B41QDBZRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TL4050B41QDBZRQ1

Manufacturer:: Texas Instruments

Category:: Voltage Reference

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

Datasheet:: TL4050B41QDBZRQ1.pdf

Description:: IC VREF SHUNT 0.2% SOT23-3

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Product details

Overview

TL4050B41QDBZRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference delivering a fixed 4.096 V output with ±0.2% initial tolerance, 50 ppm/°C max temperature coefficient, and 93 μV_RMS wideband noise (10 Hz–10 kHz) across –40°C to +125°C. It operates from 68 μA min to 15 mA cathode current and serves as a stable reference in high-accuracy data acquisition and automotive power monitoring circuits.

For engineers reviewing the TL4050B41QDBZRQ1 datasheet, TL4050B41QDBZRQ1 pinout, TL4050B41QDBZRQ1 application, or TL4050B41QDBZRQ1 equivalent, key selection criteria include its SOT-23-3 package, 4.096 V output, ±0.2% grade B tolerance, low-noise performance, and AEC-Q100 qualification for automotive use.

Technical Context

The TL4050B41QDBZRQ1 functions as a two-terminal shunt reference requiring no external capacitor for stability and supporting all capacitive loads. Its internal bandgap architecture delivers tight regulation over wide current (68 μA–15 mA) and temperature (–40°C to +125°C) ranges while maintaining low dynamic impedance (0.5 Ω at 1 mA).

Designed for automotive-grade reliability, it features ±2000 V HBM ESD rating, thermal hysteresis of 1.148 mV, and long-term stability of 120 ppm after 1000 hours - enabling robust operation in safety-critical vehicle subsystems without output filtering or layout constraints.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	4.096 V nominal - enables exact 1 mV LSB resolution in 12-bit ADC systems powered from 5 V supplies.
Initial Tolerance	±0.2% max at 25°C - meets Grade B specification for cost-sensitive automotive sensor signal conditioning.
Temp Coefficient	±50 ppm/°C max over –40°C to +125°C - ensures ≤ ±0.5 mV drift across full automotive temperature range.
Wideband Noise	93 μV_RMS (10 Hz–10 kHz) - supports high-resolution measurement without added filtering in battery-powered instrumentation.
Cathode Current Range	68 μA min to 15 mA - allows flexible biasing in low-power sensor nodes and high-current reference buffers.
Dynamic Impedance	0.5 Ω at 1 mA - minimizes load-induced output variation in dynamic current-sink applications.
Thermal Hysteresis	1.148 mV - quantifies reversible voltage shift after thermal cycling, critical for repeatable calibration in engine control units.

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. RoHS-compliant, NIPDAU/SN lead finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Reference output node	Connected to load and external current-setting resistor; sinks total current (IZ + IL); voltage referenced to anode.
Anode (Pin 2)	Ground/reference return	Common return path for cathode current and load current; must be tied to system ground or low-impedance reference plane.
No-Connect (Pin 3)	Parasitic Schottky anode	Internally connected to pin 2; must be left floating or tied to pin 2 - never driven externally or used as signal node.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for automotive use from –40°C to +125°C ambient, including lifetime reliability testing per stress requirements.
No output capacitor required	Stable with any capacitive load - eliminates BOM cost, PCB area, and startup delay in space-constrained modules.
Low minimum cathode current	68 μA typical - enables operation in ultra-low-power wake-on-event sensor interfaces and energy-harvesting systems.
High ESD immunity	±2000 V HBM - reduces risk of field failure in assembly and end-use environments with electrostatic exposure.
Low thermal hysteresis	1.148 mV - ensures repeatable voltage accuracy after repeated thermal cycling in under-hood ECUs.

Applications

Automotive Battery Monitoring	12-Bit Data Acquisition
Use Scenario: Real-time monitoring of 12 V battery voltage in start-stop systems with microcontroller ADC sampling. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V reference to ADC input channel. Use Value: Enables 1 mV LSB resolution and <±2 mV total error over temperature, meeting ASIL-B diagnostic coverage requirements.	Use Scenario: Precision analog front-end for industrial sensor signal digitization using ADS7842-type converters. IC Role / Device Role / Timing Role: Fixed-output reference source for ADC VREF pin in battery-powered portable test equipment. Use Value: Delivers 93 μV_RMS noise floor and ±0.2% tolerance - sufficient for 12-bit linearity without trimming or calibration.
Engine Control Unit (ECU) Sensors	Power Supply Monitor
Use Scenario: Reference for oxygen sensor (lambda) signal conditioning circuitry exposed to under-hood thermal transients. IC Role / Device Role / Timing Role: Stable voltage reference for op-amp gain-setting and ADC reference in closed-loop fuel control. Use Value: Maintains ±0.5 mV output drift over –40°C to +125°C due to 50 ppm/°C tempco and low hysteresis.	Use Scenario: Supervisory reference in DC-DC converter feedback loop for rail voltage validation in ADAS domain controllers. IC Role / Device Role / Timing Role: Precision shunt reference comparing regulated output against 4.096 V threshold for fault detection. Use Value: Supports fast response (<1 µs pulse rise time) and stable operation across 15 mA load steps without oscillation.

Automotive Battery Monitoring

12-Bit Data Acquisition

Use Scenario: Real-time monitoring of 12 V battery voltage in start-stop systems with microcontroller ADC sampling.

IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 4.096 V reference to ADC input channel.

Use Value: Enables 1 mV LSB resolution and <±2 mV total error over temperature, meeting ASIL-B diagnostic coverage requirements.

Use Scenario: Precision analog front-end for industrial sensor signal digitization using ADS7842-type converters.

IC Role / Device Role / Timing Role: Fixed-output reference source for ADC VREF pin in battery-powered portable test equipment.

Use Value: Delivers 93 μV_RMS noise floor and ±0.2% tolerance - sufficient for 12-bit linearity without trimming or calibration.

Engine Control Unit (ECU) Sensors

Power Supply Monitor

Use Scenario: Reference for oxygen sensor (lambda) signal conditioning circuitry exposed to under-hood thermal transients.

IC Role / Device Role / Timing Role: Stable voltage reference for op-amp gain-setting and ADC reference in closed-loop fuel control.

Use Value: Maintains ±0.5 mV output drift over –40°C to +125°C due to 50 ppm/°C tempco and low hysteresis.

Use Scenario: Supervisory reference in DC-DC converter feedback loop for rail voltage validation in ADAS domain controllers.

IC Role / Device Role / Timing Role: Precision shunt reference comparing regulated output against 4.096 V threshold for fault detection.

Use Value: Supports fast response (<1 µs pulse rise time) and stable operation across 15 mA load steps without oscillation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TL4050A41QDBZRQ1	±0.1% initial tolerance (Grade A), same 4.096 V output and SOT-23-3 package	Better accuracy for calibration-critical systems; higher cost and tighter supply current matching required	Select when absolute initial accuracy > ±0.15% is mandatory and budget permits Grade A premium
MAX6008BEUR+T	4.096 V output, ±0.2% tolerance, but only rated to +85°C ambient and lacks AEC-Q100 qualification	Not suitable for under-hood automotive use; limited to industrial or consumer applications with lower temp requirements	Consider only for non-automotive designs where extended temperature range and automotive qualification are not required

Compared with TL4050A41QDBZRQ1, the TL4050B41QDBZRQ1 trades 0.1% initial accuracy for broader production yield and lower cost, while MAX6008BEUR+T offers similar electrical specs but fails automotive qualification - making TL4050B41QDBZRQ1 the optimal balance of accuracy, reliability, and cost for Grade 1 automotive systems.

Availability

TL4050B41QDBZRQ1 is available at Aetrix Electronics and suitable for automotive battery monitoring, 12-bit data acquisition, and engine control unit sensor conditioning requiring stable component supply across extended temperature ranges and AEC-Q100 compliance.

Supply support for TL4050B41QDBZRQ1 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 precision reference design and automotive qualification.

The TL4050-Q1 product line was engineered specifically for AEC-Q100-compliant automotive subsystems demanding high accuracy, low power, and robust thermal performance - targeting battery management, sensor interfaces, and power monitoring in harsh environments.

FAQ

What is the operating temperature range of the TL4050B41QDBZRQ1?

The TL4050B41QDBZRQ1 is qualified for operation from –40°C to +125°C ambient temperature per AEC-Q100 Grade 1 requirements. This range is validated across all electrical parameters in the datasheet, including output voltage tolerance, temperature coefficient, and dynamic impedance - ensuring reliable performance in under-hood automotive applications.

Does the TL4050B41QDBZRQ1 require an output capacitor?

No, the TL4050B41QDBZRQ1 does not require an output capacitor for stability. Its design is inherently stable with all capacitive loads, eliminating the need for external bypass components. This simplifies layout, reduces BOM count, and avoids potential startup delays or ringing issues associated with capacitor-based compensation.

What is the minimum cathode current needed for proper regulation of the TL4050B41QDBZRQ1?

The TL4050B41QDBZRQ1 requires a minimum cathode current of 68 μA (typical) at 25°C and 78 μA across the full –40°C to +125°C range to maintain regulation within specified tolerance. Below this current, output voltage may deviate beyond the ±0.2% initial accuracy band, especially at temperature extremes.

How does the TL4050B41QDBZRQ1 achieve low noise performance?

The TL4050B41QDBZRQ1 achieves 93 μV_RMS wideband noise (10 Hz–10 kHz) through optimized bandgap core design and low-noise internal amplification. This noise level is measured at 100 μA cathode current and enables direct use in high-resolution ADC references without additional filtering - critical for precision instrumentation and automotive sensor signal chains.

Is the TL4050B41QDBZRQ1 pin-compatible with other TL4050-Q1 variants?

Yes, the TL4050B41QDBZRQ1 in SOT-23-3 (DBZ) package shares identical pinout and footprint with all other TL4050x-Q1 variants in the same DBZ package, including TL4050B25QDBZRQ1 and TL4050B50QDBZRQ1. This allows drop-in replacement across 2.048 V, 2.5 V, 4.096 V, and 5 V output versions when board layout permits voltage-level compatibility.

TL4050B41QDBZRQ1 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):: 4.096V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.2%

Temperature Coefficient:: 50ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 93µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 78 µA

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

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

TL4050B41QDBZRQ1 FAQ

1.How can I place an order for TL4050B41QDBZRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for TL4050B41QDBZRQ1 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 TL4050B41QDBZRQ1 reliable?

The price and inventory of TL4050B41QDBZRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B41QDBZRQ1 is usually 5 days.

3.What payment methods are accepted for TL4050B41QDBZRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B41QDBZRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TL4050B41QDBZRQ1?

TL4050B41QDBZRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TL4050B41QDBZRQ1 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 TL4050B41QDBZRQ1?

For technical support, including TL4050B41QDBZRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B41QDBZRQ1 requirements.

6.How does Aetrix verify that TL4050B41QDBZRQ1 is sourced from the original manufacturer or authorized distributors?

All TL4050B41QDBZRQ1 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 TL4050B41QDBZRQ1 meets industry standards.

7.What is the process for return or replacement of TL4050B41QDBZRQ1?

All TL4050B41QDBZRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B41QDBZRQ1, 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 TL4050B41QDBZRQ1 part is unused and in its original packaging.

Return procedure for TL4050B41QDBZRQ1:

1.Submit a request within 90 days.

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

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