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

Texas Instruments TL4050B41QDBZTG4

Name: TL4050B41QDBZTG4
Brand: Texas Instruments
SKU: TL4050B41QDBZTG4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TL4050B41QDBZTG4

Manufacturer:: Texas Instruments

Category:: Voltage Reference

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

Datasheet:: TL4050B41QDBZTG4.pdf

Description:: IC VREF SHUNT 0.2% SOT23-3

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Product details

Overview

TL4050B41QDBZTG4 from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 4.096V output with ±0.2% initial tolerance (max), 50ppm/°C temperature coefficient (max), and 93μVRMS wideband noise. It operates from –40°C to +125°C and supports cathode currents from 68μA to 15mA, enabling use in high-accuracy 12-bit data-acquisition systems powered from 5V rails.

For engineers reviewing the TL4050B41QDBZTG4 datasheet, TL4050B41QDBZTG4 pinout, TL4050B41QDBZTG4 application, or TL4050B41QDBZTG4 equivalent, this page provides verified electrical specifications, SOT-23-3 terminal mapping, thermal hysteresis (1.148mV), dynamic impedance (0.5Ω), and validated alternatives for industrial and automotive voltage reference design.

Technical Context

The TL4050B41QDBZTG4 functions as a two-terminal shunt reference requiring no external capacitor for stability and remaining functional across all capacitive loads. Its internal bandgap core delivers fixed 4.096V reverse breakdown voltage with low dynamic impedance (0.5Ω at 1mA) and tight thermal hysteresis (1.148mV over –40°C to 125°C cycling).

It maintains regulation across a 68μA–15mA cathode current range while exhibiting minimal voltage drift: ±0.9mV over 1mA < I_Z < 15mA and ±0.2mV over I_Z,min < I_Z < 1mA at 25°C. Long-term stability is 120ppm after 1000 hours at 25°C.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	4.096V nominal; enables exact 1mV LSB in 12-bit ADCs with 5V supply (e.g., ADS7842)
Initial Tolerance	±0.2% max at 25°C; supports cost-sensitive precision applications without trimming
Temp Coefficient	±50ppm/°C max over –40°C to 125°C; ensures ≤±0.512mV drift across full operating range
Noise (10Hz–10kHz)	93μVRMS typical; minimizes quantization error in high-resolution data acquisition
Dynamic Impedance	0.5Ω at 1mA, 120Hz; maintains output stability under fast load transients
Min Cathode Current	68μA typical at 25°C; allows ultra-low-power operation in battery-powered sensors
Thermal Hysteresis	1.148mV; limits repeatability error after thermal cycling between –40°C and 125°C

Pinout & Package

SOT-23-3 package (DBZ) with 1.0mm × 2.9mm footprint, 1.45mm height, and moisture sensitivity level 1. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no connection; parasitic Schottky diode to Pin 2 requires floating or tie to Pin 2).

Pin/Terminal	Circuit Role	Design Meaning
Cathode (Pin 1)	Reference output node	Connects to load and bias resistor; sinks total current (I_Z + I_L)
Anode (Pin 2)	Ground reference terminal	Must be connected to system ground; forms reference return path
NC (Pin 3)	No internal connection	Must remain floating or tied to Pin 2 per TI recommendation to avoid parasitic conduction

Key Features

Feature	Design Value
Stable with all capacitive loads	Eliminates need for output bypass capacitor-reduces BOM count and board area in space-constrained designs
Extended temperature range	–40°C to +125°C operation enables use in under-hood automotive and industrial control environments
Low micropower consumption	68μA minimum cathode current allows >10-year battery life in wireless sensor nodes
Low thermal hysteresis	1.148mV hysteresis ensures repeatable voltage accuracy after thermal cycling in field-deployed equipment
High ESD robustness	±2000V HBM rating protects against handling damage during assembly and field service

Applications

Data-Acquisition Systems	Automotive Electronics
Use Scenario: 12-bit ADC reference in portable multimeters and process monitors. IC Role / Device Role / Timing Role: Provides precise 4.096V reference for analog-to-digital conversion, enabling 1mV LSB resolution. Use Value: Eliminates calibration drift over temperature and time-critical for metrology-grade measurements.	Use Scenario: Reference for engine control unit (ECU) sensor signal conditioning. IC Role / Device Role / Timing Role: Supplies stable reference to analog front-end circuits monitoring oxygen, pressure, and temperature sensors. Use Value: Maintains accuracy across –40°C cold starts and +125°C under-hood conditions without derating.
Power-Supply Monitors	Battery-Powered Equipment
Use Scenario: Precision feedback reference in isolated DC-DC converters for telecom infrastructure. IC Role / Device Role / Timing Role: Sets regulated output voltage via optocoupler feedback loop in secondary-side regulation. Use Value: Tight 0.2% tolerance and low dynamic impedance ensure ±0.5% output regulation over line/load/transient conditions.	Use Scenario: Voltage reference in handheld medical devices (e.g., glucose meters, pulse oximeters). IC Role / Device Role / Timing Role: Enables accurate analog sensing with minimal quiescent current draw from coin-cell batteries. Use Value: 68μA min cathode current extends battery life beyond 5 years in low-duty-cycle applications.

Data-Acquisition Systems

Automotive Electronics

Use Scenario: 12-bit ADC reference in portable multimeters and process monitors.

IC Role / Device Role / Timing Role: Provides precise 4.096V reference for analog-to-digital conversion, enabling 1mV LSB resolution.

Use Value: Eliminates calibration drift over temperature and time-critical for metrology-grade measurements.

Use Scenario: Reference for engine control unit (ECU) sensor signal conditioning.

IC Role / Device Role / Timing Role: Supplies stable reference to analog front-end circuits monitoring oxygen, pressure, and temperature sensors.

Use Value: Maintains accuracy across –40°C cold starts and +125°C under-hood conditions without derating.

Power-Supply Monitors

Battery-Powered Equipment

Use Scenario: Precision feedback reference in isolated DC-DC converters for telecom infrastructure.

IC Role / Device Role / Timing Role: Sets regulated output voltage via optocoupler feedback loop in secondary-side regulation.

Use Value: Tight 0.2% tolerance and low dynamic impedance ensure ±0.5% output regulation over line/load/transient conditions.

Use Scenario: Voltage reference in handheld medical devices (e.g., glucose meters, pulse oximeters).

IC Role / Device Role / Timing Role: Enables accurate analog sensing with minimal quiescent current draw from coin-cell batteries.

Use Value: 68μA min cathode current extends battery life beyond 5 years in low-duty-cycle applications.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF3040AIDBZR	4.096V, ±0.2% tolerance, 50ppm/°C, but SOT-23-5 package with enable pin; higher 100μVRMS noise	Requires PCB layout change due to 5-pin footprint and active-enable logic; not drop-in	Choose when system-level power sequencing or shutdown control is required
ADR3440ARJZ-R7	4.096V, ±0.1% tolerance, 30ppm/°C, SC70-5 package; 50μVRMS noise; rated only to +105°C	Superior accuracy and noise, but limited to industrial temp range-not suitable for automotive AEC-Q100 designs	Prefer for lab instrumentation where extended temperature is unnecessary and tighter spec justifies cost premium

Compared with TL4050B41QDBZTG4, REF3040AIDBZR adds enable functionality at the cost of pin count and noise, while ADR3440ARJZ-R7 improves accuracy and noise but sacrifices extended temperature capability-making TL4050B41QDBZTG4 optimal for cost-sensitive, high-temp shunt reference needs.

Availability

TL4050B41QDBZTG4 is available at Aetrix Electronics and suitable for data-acquisition systems, automotive electronics, and battery-powered equipment requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TL4050B41QDBZTG4 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 specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade components.

The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power shunt reference applications in harsh environments including automotive, industrial, and portable instrumentation.

FAQ

What is the maximum operating temperature for TL4050B41QDBZTG4?

The TL4050B41QDBZTG4 is characterized for operation from –40°C to +125°C ambient temperature, meeting extended temperature requirements for under-hood automotive and industrial control applications. This rating is confirmed in Section 5.7 of the official datasheet (SLOS486B) under TL4050x41Q Electrical Characteristics.

Does TL4050B41QDBZTG4 require an output capacitor?

No, TL4050B41QDBZTG4 does not require an output capacitor for stability-it is designed to remain stable with all capacitive loads. While a bypass capacitor may be added for additional noise filtering, it is not necessary for regulation integrity, simplifying layout and reducing bill-of-materials cost.

What is the minimum cathode current needed for TL4050B41QDBZTG4 to regulate properly?

The TL4050B41QDBZTG4 requires a minimum cathode current of 68μA (typical) at 25°C, rising to 78μA across the full –40°C to +125°C range. This value is specified in Table 5.7 (TL4050x41Q Electrical Characteristics) and must be maintained to ensure stable 4.096V output regulation.

How does TL4050B41QDBZTG4 compare to the A-grade version TL4050A41QDBZTG4?

TL4050B41QDBZTG4 offers ±0.2% initial tolerance versus ±0.1% for TL4050A41QDBZTG4, with identical temperature coefficient (±50ppm/°C), noise (93μVRMS), and operating range (–40°C to +125°C). The B-grade provides lower cost while maintaining full compatibility in applications where 0.2% accuracy suffices.

Can TL4050B41QDBZTG4 be used in place of TL4050B41IDBZTG4?

Yes-TL4050B41QDBZTG4 replaces TL4050B41IDBZTG4 in applications requiring extended temperature operation. Both share identical electrical specs (4.096V, ±0.2%, 93μVRMS), but TL4050B41QDBZTG4 is qualified for –40°C to +125°C, whereas the 'I' suffix part is limited to –40°C to +85°C per TI's ordering table (Section 9.1).

TL4050B41QDBZTG4 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:: Discontinued at Digi-Key

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:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3

TL4050B41QDBZTG4 FAQ

1.How can I place an order for TL4050B41QDBZTG4 through Aetrix?

Please submit a Request for Quotation (RFQ) for TL4050B41QDBZTG4 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 TL4050B41QDBZTG4 reliable?

The price and inventory of TL4050B41QDBZTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B41QDBZTG4 is usually 5 days.

3.What payment methods are accepted for TL4050B41QDBZTG4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B41QDBZTG4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TL4050B41QDBZTG4?

TL4050B41QDBZTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TL4050B41QDBZTG4 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 TL4050B41QDBZTG4?

For technical support, including TL4050B41QDBZTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B41QDBZTG4 requirements.

6.How does Aetrix verify that TL4050B41QDBZTG4 is sourced from the original manufacturer or authorized distributors?

All TL4050B41QDBZTG4 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 TL4050B41QDBZTG4 meets industry standards.

7.What is the process for return or replacement of TL4050B41QDBZTG4?

All TL4050B41QDBZTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B41QDBZTG4, 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 TL4050B41QDBZTG4 part is unused and in its original packaging.

Return procedure for TL4050B41QDBZTG4:

1.Submit a request within 90 days.

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

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