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Texas Instruments TL4050B25QDCKR
- Part No.:
- TL4050B25QDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4050B25QDCKR.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,707
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Product details
Overview
TL4050B25QDCKR from Texas Instruments is a precision 2.5V shunt voltage reference in SC-70-3 package, rated for –40°C to 125°C operation, with ±0.2% initial tolerance, ±50ppm/°C temperature coefficient, 41μVRMS wideband noise, and stable operation down to 60μA cathode current. It serves as a low-power, high-stability reference in battery-powered data acquisition and automotive sensor signal conditioning.
For engineers reviewing the TL4050B25QDCKR datasheet, TL4050B25QDCKR pinout, TL4050B25QDCKR application, or TL4050B25QDCKR equivalent, this page delivers verified electrical specs, thermal performance boundaries, SOT-23/SC-70 pin mapping, and direct alternatives for extended-temperature industrial and automotive designs.
Technical Context
The TL4050B25QDCKR operates as a two-terminal shunt reference requiring no external output capacitor and remaining stable across all capacitive loads. Its internal bandgap core delivers fixed 2.5V reverse breakdown voltage with dynamic impedance of just 0.3Ω at 1mA, enabling precise regulation under varying load and supply conditions.
Designed for extended-temperature environments, the Q-grade variant guarantees full-spec performance from –40°C to 125°C, with thermal hysteresis limited to 0.7mV and long-term stability of 120ppm over 1000 hours - critical for automotive powertrain and industrial process control calibration integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal at 100μA cathode current; enables LSB-accurate scaling in 12-bit ADCs with 5V supplies. |
| Initial Tolerance | ±0.2% max at 25°C (B grade); supports mid-tier precision without A-grade cost premium. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C; ensures ≤1.25mV drift across full operating range. |
| Noise (10Hz–10kHz) | 41μVRMS typical; low enough to avoid degrading ENOB in 16-bit SAR ADC front-ends. |
| Min Cathode Current | 60μA typical (65μA max over temp); allows ultra-low-power operation in energy-harvesting nodes. |
| Dynamic Impedance | 0.3Ω at 1mA, 120Hz; maintains tight regulation despite fast load transients in SMPS feedback paths. |
| Operating Temp Range | –40°C to 125°C (Q grade); qualified for under-hood automotive and industrial motor drive applications. |
Pinout & Package
TL4050B25QDCKR uses the SC-70-3 (DCK) package: 1.25mm × 2.1mm footprint, 0.65mm pitch, 0.9mm height. Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no internal connection; must be left floating or tied to Pin 2 per TI guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connects to regulated voltage rail; sinks total current (load + reference bias); polarity-sensitive in shunt configuration. |
| Anode (Pin 2) | Ground reference terminal | Must be connected to system ground or lowest potential node; defines 0V reference for VZ measurement. |
| NC (Pin 3) | No internal connection | Parasitic Schottky diode exists between Pins 2–3; Pin 3 must float or tie to Pin 2 - never drive externally. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates BOM cost and board space for bypass caps while maintaining phase margin >45° across 1pF–10μF loads. |
| Ultra-low quiescent current | 60μA typical minimum cathode current enables >10-year battery life in wireless sensor nodes at 2.5V output. |
| Extended temperature qualification | Full electrical spec compliance from –40°C to 125°C meets AEC-Q100 Grade 1 requirements for automotive ECUs. |
| Low thermal hysteresis | 0.7mV max after –40°C ↔ 125°C cycling preserves calibration accuracy in thermally cycled systems. |
| High ESD robustness | ±2000V HBM rating protects against assembly-line and field handling damage without external clamping. |
Applications
| Automotive Sensor Signal Conditioning | Portable Data Acquisition |
|---|---|
Use Scenario: Front-end reference for MEMS pressure sensors in engine manifold monitoring. IC Role / Device Role / Timing Role: Provides stable 2.5V excitation and ADC reference in analog signal chain. Use Value: ±0.2% tolerance and ±50ppm/°C TC ensure <±0.5% total error over full under-hood temperature range. |
Use Scenario: Reference for handheld multimeter's 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Low-noise 2.5V reference enabling true 16-bit resolution at 10SPS. Use Value: 41μVRMS noise and 0.3Ω dynamic impedance prevent noise-induced code flicker below 100nV LSB. |
| Industrial Process Controller | Battery-Powered IoT Node |
Use Scenario: Calibration reference in 4–20mA loop transmitter for flow metering. IC Role / Device Role / Timing Role: Shunt reference establishing precise current-sense threshold and DAC reference. Use Value: Long-term stability of 120ppm/1000h minimizes recalibration frequency in unattended installations. |
Use Scenario: Voltage reference for BLE SoC ADC during periodic environmental sensing. IC Role / Device Role / Timing Role: Ultra-low-current shunt reference enabling sub-10μA sleep-mode current draw. Use Value: 60μA min cathode current allows operation directly from coin-cell batteries for >5 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3025AIDBZR | 2.5V, ±0.2%, 50ppm/°C, but SOT-23-3 only; no Q-grade (-40°C to 125°C) option available. | Limited to industrial temp range (–40°C to 85°C); unsuitable for under-hood automotive use. | Select when ambient temperature stays below 85°C and SC-70 footprint is not required. |
| ADR3425ARJZ-R7 | 2.5V, ±0.1%, 30ppm/°C, SC-70-6 package; higher accuracy but larger footprint and no Q-grade rating. | Requires PCB redesign for 6-pin layout; lacks extended-temp validation for harsh environments. | Choose only if tighter initial tolerance and lower TC outweigh footprint and qualification constraints. |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, TL4050B25QDCKR uniquely combines SC-70-3 size, –40°C to 125°C qualification, and B-grade precision - making it the only drop-in solution for space-constrained, high-temp industrial and automotive shunt reference needs.
Availability
TL4050B25QDCKR is available at Aetrix Electronics and suitable for automotive sensor modules, portable instrumentation, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4050B25QDCKR 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in precision analog design and automotive qualification.
The TL4050 series was engineered specifically for micropower, high-stability shunt reference applications in battery-operated and thermally demanding systems - emphasizing low noise, zero-capacitor stability, and extended-temperature reliability.
FAQ
What is the maximum cathode current rating for TL4050B25QDCKR?
The absolute maximum cathode current for TL4050B25QDCKR is 20mA, per its Absolute Maximum Ratings table. However, the recommended operating condition limits continuous cathode current to 15mA to ensure long-term reliability and thermal stability within the SC-70 package's 252°C/W junction-to-ambient thermal resistance.
Does TL4050B25QDCKR require an output capacitor for stability?
No, TL4050B25QDCKR does not require an output capacitor for stability. Its architecture is inherently stable with all capacitive loads from 1pF to 10μF, eliminating the need for external bypass components - a key advantage for space-constrained and low-BOM-cost designs.
How does the SC-70 package of TL4050B25QDCKR differ from SOT-23 variants in thermal performance?
The SC-70 package used by TL4050B25QDCKR has a higher thermal impedance (252°C/W) than the SOT-23-3 (DBZ) variant (206°C/W), resulting in ~22% greater junction temperature rise at identical power dissipation - a critical consideration for high-current or high-ambient-temperature deployments.
Can TL4050B25QDCKR be used in a series (three-terminal) regulator configuration?
No, TL4050B25QDCKR is strictly a two-terminal shunt reference and cannot function as a series regulator. It must be used with an external current-setting resistor between supply and cathode, sinking excess current to ground via the anode - standard shunt topology only.
What is the thermal hysteresis specification for TL4050B25QDCKR, and why does it matter?
TL4050B25QDCKR exhibits 0.7mV maximum thermal hysteresis after cycling between –40°C and 125°C. This parameter quantifies residual voltage shift after extreme temperature excursions - essential for applications like automotive calibration where repeatable accuracy after thermal stress is mandatory.
TL4050B25QDCKR 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):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 41µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TL4050B25QDCKR FAQ
1.How can I place an order for TL4050B25QDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B25QDCKR 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 TL4050B25QDCKR reliable?
The price and inventory of TL4050B25QDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B25QDCKR is usually 5 days.
3.What payment methods are accepted for TL4050B25QDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B25QDCKR transactions.
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4.How is shipping managed for TL4050B25QDCKR?
TL4050B25QDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B25QDCKR 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 TL4050B25QDCKR?
For technical support, including TL4050B25QDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B25QDCKR requirements.
6.How does Aetrix verify that TL4050B25QDCKR is sourced from the original manufacturer or authorized distributors?
All TL4050B25QDCKR 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 TL4050B25QDCKR meets industry standards.
7.What is the process for return or replacement of TL4050B25QDCKR?
All TL4050B25QDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B25QDCKR, 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 TL4050B25QDCKR part is unused and in its original packaging.
Return procedure for TL4050B25QDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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