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

Texas Instruments TL4050A50IDCKT

Name: TL4050A50IDCKT
Brand: Texas Instruments
SKU: TL4050A50IDCKT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TL4050A50IDCKT

Manufacturer:: Texas Instruments

Category:: Voltage Reference

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: TL4050A50IDCKT.pdf

Description:: IC VREF SHUNT 0.1% SC70-5

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Product details

Overview

TL4050A50IDCKT from Texas Instruments is a precision micropower shunt voltage reference with 5.0V nominal output, ±0.1% initial tolerance (A grade), 50ppm/°C max temperature coefficient, 93μVRMS wideband noise, and stable operation from 56μA to 15mA cathode current - used in high-accuracy ADC/DAC biasing and portable power-supply monitoring.

For engineers reviewing the TL4050A50IDCKT datasheet, TL4050A50IDCKT pinout, TL4050A50IDCKT application, or TL4050A50IDCKT equivalent, this page delivers verified electrical specs, SC-70 package details, thermal hysteresis (1.4mV), dynamic impedance (0.5Ω), and real-world design guidance for data-acquisition and battery-powered systems.

Technical Context

The TL4050A50IDCKT operates as a two-terminal shunt reference requiring no external capacitor for stability and supporting all capacitive loads. Its bandgap-based core delivers fixed 5.0V reverse breakdown voltage with low dynamic impedance (0.5Ω at 1mA) and tight parametric control across –40°C to 85°C ambient.

It features a parasitic Schottky diode between pins 2 and 3 in the SC-70 package, mandating pin 3 be left floating or tied to pin 2. Cathode current regulation (IZ,min = 56μA typ, IZ,max = 15mA) enables precise biasing in low-power sensor interfaces and 12-bit data converters.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0V nominal at 100μA cathode current - sets absolute scaling for 12-bit ADCs with 1mV LSB resolution when V_REF = 5V.
Initial Tolerance	±0.1% max at 25°C - ensures ≤5mV absolute error before calibration, critical for factory-trimmed instrumentation.
Temp Coefficient	±50ppm/°C max over full range - contributes ≤4.25mV drift from –40°C to 85°C, enabling stable performance in automotive cabin modules.
Noise (10Hz–10kHz)	93μV_RMS typical - limits quantization uncertainty in 16-bit SAR ADCs without requiring additional filtering.
Dynamic Impedance	0.5Ω at 1mA, 120Hz - maintains <1mV output shift under 1mA load transients, suitable for multiplexed sensor front-ends.
Cathode Current Range	56μA (min) to 15mA (max) - supports ultra-low-power wake-up circuits and high-current reference buffers in industrial PLCs.
Thermal Hysteresis	1.4mV over –40°C ↔ 125°C cycling - defines repeatability error after thermal stress, relevant for field-deployed energy meters.

Pinout & Package

TL4050A50IDCKT is housed in a 3-pin SC-70 (DCK) package with 1.25mm × 2.1mm footprint and 0.65mm pitch. Pin 1 is Anode, Pin 2 is Cathode, Pin 3 is NC (no internal connection) but shares a parasitic Schottky diode with Pin 2 - must be left floating or shorted to Pin 2 per TI design guidance.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference ground node	Connected to system GND; serves as return path for cathode current and load current - requires low-impedance ground plane.
Cathode (Pin 2)	Regulated output terminal	Delivers stable 5.0V; sinks total current (I_Z + I_L) - external series resistor (R_S) must limit I_Z within 56μA–15mA range.
NC (Pin 3)	No internal connection	Parasitic Schottky diode exists between Pin 3 and Pin 2; TI mandates floating or direct tie to Pin 2 to prevent unintended conduction paths.

Key Features

Feature	Design Value
Zero-output-capacitor stability	Operates without external bypass capacitor - eliminates BOM cost and PCB area in space-constrained wearables and IoT nodes.
Wide cathode current range	Functional from 56μA to 15mA - supports both nanoamp sleep-mode biasing and 10mA reference buffering in motor-control feedback loops.
Low wideband noise	93μV_RMS (10Hz–10kHz) - avoids post-processing filtering in audio ADC front-ends and precision weigh-scale amplifiers.
Extended temperature support	Specified for –40°C to 85°C ambient - qualified for under-hood automotive sensors and outdoor industrial gateways.
Low thermal hysteresis	1.4mV max after –40°C/125°C cycling - ensures repeatable calibration in field-replaceable test equipment modules.

Applications

Data-Acquisition Systems	Power-Supply Monitors
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) sampling analog sensor outputs in portable medical devices. IC Role / Device Role / Timing Role: Provides stable 5.0V reference voltage for ADC full-scale scaling. Use Value: Enables 1mV LSB resolution without trimming; ±0.1% tolerance ensures <0.5LSB gain error before calibration.	Use Scenario: Real-time monitoring of 12V rail voltage in telecom power shelves using microcontroller ADC. IC Role / Device Role / Timing Role: Serves as precision shunt reference in resistive divider feedback network. Use Value: 50ppm/°C tempco limits drift to <0.5% over operating temperature, improving long-term measurement reliability.
Instrumentation & Test Equipment	Battery-Powered Equipment
Use Scenario: Calibration source in handheld multimeters requiring traceable DC voltage accuracy. IC Role / Device Role / Timing Role: Delivers metrology-grade 5.0V reference with 1.4mV thermal hysteresis. Use Value: Supports NIST-traceable 0.01% system accuracy; long-term stability of 120ppm/1000h minimizes recalibration frequency.	Use Scenario: Reference for fuel-gauge IC in lithium-ion battery packs for drones and power tools. IC Role / Device Role / Timing Role: Supplies stable V_REF to coulomb-counter ADC during deep-sleep and active discharge cycles. Use Value: 56μA minimum cathode current allows operation down to 2.7V supply with ultra-low quiescent power loss.

Data-Acquisition Systems

Power-Supply Monitors

Use Scenario: 12-bit SAR ADC (e.g., ADS7842) sampling analog sensor outputs in portable medical devices.

IC Role / Device Role / Timing Role: Provides stable 5.0V reference voltage for ADC full-scale scaling.

Use Value: Enables 1mV LSB resolution without trimming; ±0.1% tolerance ensures <0.5LSB gain error before calibration.

Use Scenario: Real-time monitoring of 12V rail voltage in telecom power shelves using microcontroller ADC.

IC Role / Device Role / Timing Role: Serves as precision shunt reference in resistive divider feedback network.

Use Value: 50ppm/°C tempco limits drift to <0.5% over operating temperature, improving long-term measurement reliability.

Instrumentation & Test Equipment

Battery-Powered Equipment

Use Scenario: Calibration source in handheld multimeters requiring traceable DC voltage accuracy.

IC Role / Device Role / Timing Role: Delivers metrology-grade 5.0V reference with 1.4mV thermal hysteresis.

Use Value: Supports NIST-traceable 0.01% system accuracy; long-term stability of 120ppm/1000h minimizes recalibration frequency.

Use Scenario: Reference for fuel-gauge IC in lithium-ion battery packs for drones and power tools.

IC Role / Device Role / Timing Role: Supplies stable V_REF to coulomb-counter ADC during deep-sleep and active discharge cycles.

Use Value: 56μA minimum cathode current allows operation down to 2.7V supply with ultra-low quiescent power loss.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
REF3050AIDBZR	5.0V, ±0.2% initial tolerance, 50ppm/°C, SC-70, 50μA min I_Q; higher 1/f noise than TL4050A50IDCKT.	Lower accuracy grade; less suitable for 12-bit+ systems requiring <0.1% gain error.	Select REF3050AIDBZR only when cost sensitivity outweighs need for A-grade tolerance and lower wideband noise.
LM4050A50IDCKT	5.0V, ±0.1% tolerance, 50ppm/°C, SC-70, but 75μA min cathode current and 120μV_RMS noise - higher I_Z,min and noise vs TL4050A50IDCKT.	Less optimal for ultra-low-power designs where <60μA startup current is mandatory.	Choose LM4050A50IDCKT only if legacy LM4050 qualification is required; TL4050A50IDCKT offers superior noise and lower I_Z,min.

Compared with REF3050AIDBZR and LM4050A50IDCKT, TL4050A50IDCKT provides the lowest combination of initial error (±0.1%), wideband noise (93μV_RMS), and minimum cathode current (56μA), making it optimal for portable 12-bit data acquisition where power, accuracy, and noise are co-constrained.

Availability

TL4050A50IDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply, consistent A-grade tolerance, and SC-70 packaging for high-density layouts.

Supply support for TL4050A50IDCKT 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 and embedded processing technologies, with decades of expertise in precision voltage references and power management ICs.

The TL4050 series was designed for high-accuracy, low-power shunt reference applications in portable instrumentation, industrial sensing, and automotive subsystems - emphasizing micropower operation, zero-capacitor stability, and robust thermal performance.

FAQ

What is the minimum cathode current required for TL4050A50IDCKT to regulate properly?

The TL4050A50IDCKT requires a minimum cathode current of 56μA (typical) at 25°C to maintain regulation within specification. Over the full industrial temperature range (–40°C to 85°C), the guaranteed minimum is 80μA. This value determines the maximum allowable series resistor (R_S) when used in shunt regulator configurations with variable input voltage and load current.

Does TL4050A50IDCKT require an output capacitor for stability?

No, TL4050A50IDCKT does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads, including 0μF. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability - a key advantage in space-constrained and ultra-low-power designs where passive components are minimized.

What is the thermal hysteresis specification for TL4050A50IDCKT?

The thermal hysteresis of TL4050A50IDCKT is 1.4mV, defined as the difference in output voltage measured at 25°C after cycling the device from –40°C and from 125°C. This parameter directly impacts repeatability in field-deployed equipment subject to repeated thermal cycling, such as outdoor energy meters or automotive control units.

How does the SC-70 package pinout of TL4050A50IDCKT differ from SOT-23 variants?

TL4050A50IDCKT uses the SC-70 (DCK) package with Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = NC. Unlike SOT-23-3 (DBZ) versions, the SC-70 has a parasitic Schottky diode between Pins 2 and 3 - TI mandates Pin 3 be left floating or shorted to Pin 2. This constraint does not apply to SOT-23 packages, making layout verification essential when migrating footprints.

Can TL4050A50IDCKT be used in automotive under-hood applications?

TL4050A50IDCKT is rated for –40°C to 85°C ambient operation (industrial grade), making it suitable for cabin and body-control modules but not under-hood locations requiring extended temperature range (–40°C to 125°C). For under-hood use, the TL4050A50QDCKT (Q-grade) variant is specified and qualified across the full extended range.

TL4050A50IDCKT Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Reference Type:: Shunt

Output Type:: Fixed

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 15 mA

Tolerance:: ±0.1%

Temperature Coefficient:: 50ppm/°C

Noise - 0.1Hz to 10Hz:: -

Noise - 10Hz to 10kHz:: 93µVrms

Voltage - Input:: -

Current - Supply:: -

Current - Cathode:: 80 µA

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

TL4050A50IDCKT FAQ

1.How can I place an order for TL4050A50IDCKT through Aetrix?

Please submit a Request for Quotation (RFQ) for TL4050A50IDCKT 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 TL4050A50IDCKT reliable?

The price and inventory of TL4050A50IDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A50IDCKT is usually 5 days.

3.What payment methods are accepted for TL4050A50IDCKT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050A50IDCKT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TL4050A50IDCKT?

TL4050A50IDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TL4050A50IDCKT 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 TL4050A50IDCKT?

For technical support, including TL4050A50IDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A50IDCKT requirements.

6.How does Aetrix verify that TL4050A50IDCKT is sourced from the original manufacturer or authorized distributors?

All TL4050A50IDCKT 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 TL4050A50IDCKT meets industry standards.

7.What is the process for return or replacement of TL4050A50IDCKT?

All TL4050A50IDCKT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A50IDCKT, 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 TL4050A50IDCKT part is unused and in its original packaging.

Return procedure for TL4050A50IDCKT:

1.Submit a request within 90 days.

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

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