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Texas Instruments TL4050C10QDBZT
- Part No.:
- TL4050C10QDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050C10QDBZT.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,315
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Product details
Overview
TL4050C10QDBZT from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.5% initial tolerance (max), 50ppm/°C temperature coefficient (max), 150μVRMS wideband noise, 0.7Ω dynamic impedance at 1mA, and operation across –40°C to 125°C - used in high-accuracy ADC/DAC biasing and automotive power-supply monitoring.
For engineers reviewing the TL4050C10QDBZT datasheet, TL4050C10QDBZT pinout, TL4050C10QDBZT application, or TL4050C10QDBZT equivalent, this page delivers verified specifications, SOT-23-3 terminal mapping, real-world use cases in data acquisition and battery-powered systems, and validated alternative options for extended-temperature shunt references.
Technical Context
The TL4050C10QDBZT operates as a two-terminal shunt reference requiring no external capacitor for stability and maintaining regulation over cathode current from 110μA (min) to 15mA. Its internal bandgap core achieves low thermal hysteresis (2.8mV) and long-term stability (120ppm after 1000h).
Designed for extended-temperature environments, it uses a precision Zener-like breakdown structure optimized for low noise and minimal voltage drift across load and supply variations - enabling direct replacement of older references like LM4040C10 without layout changes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal at 100μA cathode current; enables LSB-accurate scaling in 10-bit+ ADCs referenced to 10V full-scale. |
| Initial Tolerance | ±0.5% max at 25°C; supports cost-sensitive industrial sensors where <0.5% system gain error is acceptable. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C; ensures ≤±0.6% output drift across full automotive temperature range. |
| Noise (10Hz–10kHz) | 150μVRMS typical; limits quantization uncertainty in 16-bit SAR ADCs with >90dB SNR requirements. |
| Dynamic Impedance | 0.7Ω at 1mA, 120Hz; maintains <1mV output shift under 1mA load transients - critical for multiplexed sensor front-ends. |
| Min Cathode Current | 110μA max over full temperature range; allows ultra-low-power operation in battery-backed instrumentation. |
| Operating Temp Range | –40°C to +125°C ambient; qualified for under-hood automotive and industrial motor-control applications. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.3mm × 2.9mm footprint and 1.45mm height; thermally enhanced for 206°C/W junction-to-ambient; RoHS-compliant, lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground return path | Must connect directly to system AGND; parasitic Schottky diode to Pin 2 requires Pin 3 to float or tie to Pin 2. |
| Cathode (Pin 2) | Output voltage node | Provides regulated 10V; sinks all cathode current (IZ) and load current (IL); connects to top of series resistor (RS) in shunt configuration. |
| No-Connect (Pin 3) | Unused terminal | Internally unconnected; must remain floating or tied to Pin 2 per TI design guidance to avoid leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output bypass capacitor - reduces BOM count and PCB area in space-constrained modules. |
| Low 110μA minimum operating current | Enables operation from microamp-level bias sources - ideal for energy-harvesting and coin-cell-powered IoT nodes. |
| Extended temperature qualification | Validated performance from –40°C to 125°C supports deployment in engine control units and industrial PLCs without derating. |
| Low thermal hysteresis (2.8mV) | Minimizes calibration drift after thermal cycling - improves repeatability in test equipment and process controllers. |
| 120ppm long-term stability | Reduces recalibration frequency in metrology-grade instruments and medical diagnostics hardware. |
Applications
| Automotive Power-Supply Monitor | Portable Data Acquisition |
|---|---|
Use Scenario: Monitoring 12V battery rail in ADAS ECU during cold cranking (5.5V–16V input). IC Role / Device Role / Timing Role: Shunt reference providing stable 10V reference for ADC measuring battery voltage and alternator output. Use Value: Maintains ±0.5% accuracy across –40°C to 125°C, enabling reliable low-voltage warning and state-of-charge estimation without thermal recalibration. |
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC sampling analog inputs up to 10V full-scale. IC Role / Device Role / Timing Role: Primary voltage reference for ADC conversion; supplies precise 10V reference to internal PGA and digital filter stages. Use Value: 150μVRMS noise and 0.7Ω dynamic impedance ensure <92dB SNR and <0.001% gain error over 10,000 readings. |
| Industrial Process Controller | Battery-Powered Sensor Node |
Use Scenario: 4–20mA loop-powered transmitter conditioning thermocouple signals in chemical plant environment. IC Role / Device Role / Timing Role: Reference for DAC generating loop current setpoint; also biases signal-conditioning op-amps. Use Value: ±50ppm/°C tempco and 120ppm long-term stability enable <0.1% total measurement uncertainty over 5-year maintenance cycle. |
Use Scenario: Wireless temperature node powered by CR2032 coin cell, transmitting via BLE every 60 seconds. IC Role / Device Role / Timing Role: Low-current shunt reference powering ADC and analog front-end during active measurement burst. Use Value: 110μA min cathode current allows operation down to 2.2V supply, extending battery life beyond 2 years at 1-min interval. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C10IDBZR | Same 10V output, ±0.5% tolerance, but rated only to 125°C junction (not ambient); higher 200μVRMS noise; 75μA min cathode current. | Limited to industrial ambient ≤85°C unless heatsinked; less suitable for under-hood automotive placement. | Select when ambient temperature stays ≤85°C and lower noise is not required. |
| REF3010AIDBZR | 10V series reference; ±0.2% initial accuracy; 3.3V to 5.5V supply required; 45μA quiescent current; 35μVRMS noise. | Requires dedicated supply rail; cannot operate as true shunt; unsuitable for high-side sensing or floating configurations. | Choose only when system has clean 3.3V/5V rail and lowest noise is critical - not a drop-in replacement. |
Compared with TL4050C10QDBZT, LM4040C10IDBZR offers identical tolerance but lacks extended-temperature ambient qualification, while REF3010AIDBZR provides superior noise and accuracy at the cost of supply dependency and non-shunt topology - making TL4050C10QDBZT the sole choice for ruggedized, two-terminal, high-temp shunt designs.
Availability
TL4050C10QDBZT is available at Aetrix Electronics and suitable for automotive power-supply monitors, portable data-acquisition systems, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4050C10QDBZT 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 automotive-qualified components.
The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for high-stability, low-power shunt regulation in harsh-temperature industrial and automotive applications.
FAQ
What is the maximum cathode current rating for TL4050C10QDBZT?
The absolute maximum cathode current for TL4050C10QDBZT is 15mA, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage due to junction overheating. For reliable long-term performance, design cathode current between 110μA (minimum required) and 12mA (recommended upper limit considering power dissipation and thermal margin).
Does TL4050C10QDBZT require an output capacitor?
No, TL4050C10QDBZT does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads, including direct connection to ADC input capacitors or long PCB traces. Adding a capacitor may reduce high-frequency noise but is never mandatory for regulation integrity.
What is the thermal hysteresis specification for TL4050C10QDBZT?
The thermal hysteresis of TL4050C10QDBZT is 2.8mV, defined as the difference in output voltage measured at 25°C after cycling from –40°C versus after cycling from 125°C. This parameter directly impacts repeatability in systems undergoing repeated thermal stress, such as automotive ECUs or outdoor industrial controllers.
Can TL4050C10QDBZT be used in a series-reference configuration?
No, TL4050C10QDBZT is a two-terminal shunt reference and cannot function as a series reference. It must be connected in parallel with the load, sinking both load current and its own bias current through an external series resistor. Attempting series operation will result in failure to regulate or device damage.
What is the long-term stability of TL4050C10QDBZT after 1000 hours?
TL4050C10QDBZT exhibits 120ppm long-term stability after 1000 hours of operation at 25°C with 100μA cathode current. This value represents the maximum observed drift in output voltage and supports calibration intervals of ≥5 years in precision instrumentation where annual drift must remain below 25ppm.
TL4050C10QDBZT 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):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 110 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050C10QDBZT FAQ
1.How can I place an order for TL4050C10QDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050C10QDBZT 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 TL4050C10QDBZT reliable?
The price and inventory of TL4050C10QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050C10QDBZT is usually 5 days.
3.What payment methods are accepted for TL4050C10QDBZT?
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4.How is shipping managed for TL4050C10QDBZT?
TL4050C10QDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050C10QDBZT 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 TL4050C10QDBZT?
For technical support, including TL4050C10QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050C10QDBZT requirements.
6.How does Aetrix verify that TL4050C10QDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050C10QDBZT 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 TL4050C10QDBZT meets industry standards.
7.What is the process for return or replacement of TL4050C10QDBZT?
All TL4050C10QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050C10QDBZT, 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 TL4050C10QDBZT part is unused and in its original packaging.
Return procedure for TL4050C10QDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050C10QDBZT Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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