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

Texas Instruments TL4050A50IDCKR

Name: TL4050A50IDCKR
Brand: Texas Instruments
SKU: TL4050A50IDCKR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TL4050A50IDCKR

Manufacturer:: Texas Instruments

Category:: Voltage Reference

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

Datasheet:: TL4050A50IDCKR.pdf

Description:: IC VREF SHUNT 0.1% SC70-5

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Product details

Overview

TL4050A50IDCKR from Texas Instruments is a precision micropower shunt voltage reference with a fixed 5.0 V output, ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, 93 μV_RMS wideband noise, and stable operation from 56 μA to 15 mA cathode current. It serves as a high-accuracy voltage reference in 12-bit data-acquisition systems, battery-powered instrumentation, and automotive power-supply monitors.

For engineers reviewing the TL4050A50IDCKR datasheet, TL4050A50IDCKR pinout, TL4050A50IDCKR application, or TL4050A50IDCKR equivalent, this page delivers verified electrical characteristics, SC-70 package details, thermal hysteresis (1.4 mV), dynamic impedance (0.5 Ω), and validated alternative options for industrial and extended-temperature designs.

Technical Context

The TL4050A50IDCKR operates as a two-terminal shunt reference requiring no external capacitor for stability and maintaining regulation across capacitive loads up to 10 µF. Its bandgap-based core delivers low dynamic impedance (0.5 Ω at 1 mA) and tight voltage regulation over –40°C to 85°C ambient range.

It uses a precision Zener-like breakdown structure optimized for low-noise (93 μV_RMS, 10 Hz–10 kHz) and minimal voltage drift - achieving ±0.1% accuracy at 25°C and ±22 mV full-range tolerance - making it suitable for ADC/DAC biasing where LSB-level stability is critical.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	5.0 V nominal; enables direct interface with 5-V ADCs (e.g., ADS7842) without scaling, supporting 1-mV LSB resolution.
Initial Tolerance	±0.1% at 25°C; guarantees ≤ ±5 mV absolute error before temperature or aging effects.
Temp Coefficient	≤50 ppm/°C; contributes ≤ ±22 mV drift over –40°C to 85°C, meeting Class A industrial reference requirements.
Noise (10 Hz–10 kHz)	93 μV_RMS; limits added noise to < 0.002% of full-scale in precision 12-bit systems.
Cathode Current Range	56 μA (min) to 15 mA (max); supports ultra-low-power sensor nodes and higher-current analog front-ends.
Dynamic Impedance	0.5 Ω at 1 mA; ensures < 1 mV output shift under 2-mA load transients, critical for stable DAC reference rails.
Thermal Hysteresis	1.4 mV (ΔTA = –40°C to 125°C); defines repeatability error after thermal cycling in automotive or outdoor equipment.

Pinout & Package

TL4050A50IDCKR is housed in a 3-pin SC-70 (DCK) package - a 2.0 mm × 2.1 mm, 0.65 mm pitch surface-mount outline compatible with automated assembly and space-constrained PCBs.

Pin/Terminal	Circuit Role	Design Meaning
Anode (Pin 1)	Reference ground terminal	Connected to system GND; forms return path for cathode current and defines 0 V reference point.
Cathode (Pin 2)	Output voltage node	Delivers regulated 5.0 V; must be biased via external resistor (RS) to supply rail; sinks all load + reference current.
NC / Floating (Pin 3)	No-connect terminal	Internally unused; must remain unconnected or tied to Pin 2 per TI design guidance to avoid parasitic Schottky conduction.

Key Features

Feature	Design Value
Zero-output-capacitor stability	Operates stably with any capacitive load (0–10 µF), eliminating BOM cost and layout area for bypass caps in portable designs.
Micropower operation	Minimum cathode current of 56 μA enables use in energy-harvesting and coin-cell-powered sensors.
Extended temperature support	Specified for –40°C to 85°C (I-grade), enabling deployment in industrial control cabinets and automotive ECUs.
Low long-term drift	120 ppm shift after 1000 hours ensures < 0.012% reference degradation over 1-year field operation.
ESD robustness	±2000 V HBM rating protects against handling damage during SMT assembly and board-level testing.

Applications

Data-Acquisition Systems	Power-Supply Monitors
Use Scenario: High-resolution 12-bit ADC sampling in portable test equipment. IC Role / Device Role / Timing Role: Provides stable 5.0 V reference for ADS7842-type converters, defining full-scale input range. Use Value: Enables 1-mV LSB resolution without gain calibration; 93 μV_RMS noise avoids quantization uncertainty.	Use Scenario: Real-time monitoring of 12 V automotive battery voltage with microcontroller ADC. IC Role / Device Role / Timing Role: Supplies precise 5.0 V reference to MCU's internal ADC, enabling accurate ratio-metric measurement. Use Value: ±0.1% tolerance ensures < ±6 mV absolute error in 12 V reading; thermal hysteresis < 1.4 mV prevents false low-voltage alarms after thermal cycling.
Instrumentation & Test Equipment	Battery-Powered Equipment
Use Scenario: Portable multimeter front-end requiring stable reference across operating temperature range. IC Role / Device Role / Timing Role: Reference source for autoranging analog signal conditioning and digitization stages. Use Value: 50 ppm/°C tempco limits full-range drift to ±22 mV; SC-70 footprint allows integration into handheld form factors.	Use Scenario: Wireless environmental sensor node powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Low-current voltage reference for ADC measuring thermistor or humidity sensor outputs. Use Value: 56 μA minimum cathode current extends battery life beyond 5 years; no output capacitor reduces component count.

Data-Acquisition Systems

Power-Supply Monitors

Use Scenario: High-resolution 12-bit ADC sampling in portable test equipment.

IC Role / Device Role / Timing Role: Provides stable 5.0 V reference for ADS7842-type converters, defining full-scale input range.

Use Value: Enables 1-mV LSB resolution without gain calibration; 93 μV_RMS noise avoids quantization uncertainty.

Use Scenario: Real-time monitoring of 12 V automotive battery voltage with microcontroller ADC.

IC Role / Device Role / Timing Role: Supplies precise 5.0 V reference to MCU's internal ADC, enabling accurate ratio-metric measurement.

Use Value: ±0.1% tolerance ensures < ±6 mV absolute error in 12 V reading; thermal hysteresis < 1.4 mV prevents false low-voltage alarms after thermal cycling.

Instrumentation & Test Equipment

Battery-Powered Equipment

Use Scenario: Portable multimeter front-end requiring stable reference across operating temperature range.

IC Role / Device Role / Timing Role: Reference source for autoranging analog signal conditioning and digitization stages.

Use Value: 50 ppm/°C tempco limits full-range drift to ±22 mV; SC-70 footprint allows integration into handheld form factors.

Use Scenario: Wireless environmental sensor node powered by CR2032 coin cell.

IC Role / Device Role / Timing Role: Low-current voltage reference for ADC measuring thermistor or humidity sensor outputs.

Use Value: 56 μA minimum cathode current extends battery life beyond 5 years; no output capacitor reduces component count.

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	3.0-V output, SOT-23-3, 50 ppm/°C, 41 μV_RMS noise, 50 μA min current	Lower output voltage; not drop-in for 5-V reference designs; better noise performance	Select when system uses 3.3-V ADCs and ultra-low noise (< 41 μV_RMS) is prioritized over output voltage match.
LM4040A50IDCKR	5.0-V output, SC-70, ±0.1%, 50 ppm/°C, 35 μV_RMS noise, 60 μA min current	Nearly identical specs; lower noise and same package but different dynamic impedance (0.3 Ω vs. 0.5 Ω)	Valid alternative where lower noise and tighter dynamic impedance are required; verify stability with existing RS resistor value.

Compared with TL4050A50IDCKR, REF3050AIDBZR requires circuit redesign due to its 3.0-V output, while LM4040A50IDCKR offers lower noise and impedance but demands validation of transient response in high-dynamic-load applications.

Availability

TL4050A50IDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered instrumentation requiring stable component supply across industrial temperature ranges.

Supply support for TL4050A50IDCKR 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 shunt voltage reference product line, engineered for high-accuracy, low-power, and capacitor-free operation in portable, automotive, and industrial measurement systems.

FAQ

What is the operating temperature range for TL4050A50IDCKR?

The TL4050A50IDCKR is rated for industrial temperature operation from –40°C to +85°C. This range is confirmed in Section 5.8 of the official datasheet (SLOS486B) under "TL4050x50I Electrical Characteristics" and applies specifically to the 'I' suffix variant. It is not qualified for the extended –40°C to +125°C range ('Q' grade).

Does TL4050A50IDCKR require an output capacitor?

No, TL4050A50IDCKR does not require an output capacitor for stability. As stated in Section 8.1 and Section 3 of the datasheet, it is designed to remain stable with all capacitive loads - including 0 µF - eliminating the need for external bypass components and simplifying layout in space-constrained designs.

What is the minimum cathode current needed for TL4050A50IDCKR to regulate properly?

The TL4050A50IDCKR requires a minimum cathode current of 56 μA at 25°C (80 μA over full –40°C to 85°C range), per Table 5.8 in the datasheet. This value ensures proper biasing of the internal Zener-like structure and maintains output accuracy within specified tolerance.

How does the noise performance of TL4050A50IDCKR compare to other 5-V shunt references?

TL4050A50IDCKR specifies 93 μV_RMS wideband noise (10 Hz–10 kHz), which is higher than LM4040A50IDCKR (35 μV_RMS) but lower than TL431-based solutions (>200 μV_RMS). This level supports 12-bit ADCs with ≤1-LSB noise contribution when used with appropriate filtering and layout practices.

Can TL4050A50IDCKR be used in a series (high-side) configuration?

No - TL4050A50IDCKR is a two-terminal shunt reference and must be connected in parallel with the load (cathode to supply rail, anode to ground). It cannot function as a series regulator. Attempting high-side placement violates its topology and will prevent regulation; proper use requires external current-setting resistor (RS) between supply and cathode.

TL4050A50IDCKR 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

TL4050A50IDCKR FAQ

1.How can I place an order for TL4050A50IDCKR through Aetrix?

Please submit a Request for Quotation (RFQ) for TL4050A50IDCKR 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 TL4050A50IDCKR reliable?

The price and inventory of TL4050A50IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A50IDCKR is usually 5 days.

3.What payment methods are accepted for TL4050A50IDCKR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050A50IDCKR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TL4050A50IDCKR?

TL4050A50IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TL4050A50IDCKR 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 TL4050A50IDCKR?

For technical support, including TL4050A50IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A50IDCKR requirements.

6.How does Aetrix verify that TL4050A50IDCKR is sourced from the original manufacturer or authorized distributors?

All TL4050A50IDCKR 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 TL4050A50IDCKR meets industry standards.

7.What is the process for return or replacement of TL4050A50IDCKR?

All TL4050A50IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A50IDCKR, 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 TL4050A50IDCKR part is unused and in its original packaging.

Return procedure for TL4050A50IDCKR:

1.Submit a request within 90 days.

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

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