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Texas Instruments TL4050B25QDCKRQ1
- Part No.:
- TL4050B25QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4050B25QDCKRQ1.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
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Product details
Overview
TL4050B25QDCKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified precision micropower shunt voltage reference delivering a fixed 2.5 V output with ±0.2% initial tolerance (max), 50 ppm/°C temperature coefficient, and 41 μVRMS wideband noise. It operates from 60 μA to 15 mA cathode current across –40°C to +125°C and serves as a stable reference in automotive sensor signal conditioning and battery-powered data acquisition.
For engineers reviewing the TL4050B25QDCKRQ1 datasheet, TL4050B25QDCKRQ1 pinout, TL4050B25QDCKRQ1 application, or TL4050B25QDCKRQ1 equivalent, key selection criteria include its SC-70-5 package compatibility, low-noise performance at microamp bias, extended temperature stability, and absence of required output capacitance in shunt regulator designs.
Technical Context
The TL4050B25QDCKRQ1 implements a two-terminal bandgap-based shunt reference architecture with low dynamic impedance (0.3 Ω typical at 1 mA) and inherent stability across all capacitive loads. Its design eliminates need for external compensation while maintaining tight output regulation under varying load currents and ambient temperatures.
It features a parasitic Schottky diode between pins 2 and 3 in the SC-70 package, requiring pin 3 to be left floating or tied to pin 2-except in high-EMI environments where TI recommends connecting it to the anode. Thermal hysteresis is specified at 0.7 mV over –40°C to +125°C cycling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal; enables precise 12-bit ADC full-scale alignment with 1 mV LSB in 5 V systems. |
| Initial Tolerance | ±0.2% max at 25°C; ensures reference accuracy without post-manufacturing calibration in automotive-grade designs. |
| Temp Coefficient | ±50 ppm/°C max over –40°C to +125°C; maintains ≤1.25 mV drift across full automotive temperature range. |
| Output Noise | 41 μVRMS (10 Hz–10 kHz); supports high-resolution measurement without added filtering in sensor front-ends. |
| Cathode Current Range | 60 μA to 15 mA typical; allows operation in ultra-low-power wake-up circuits and robust supply-monitoring applications. |
| Dynamic Impedance | 0.3 Ω typical at 1 mA; minimizes output voltage shift during transient load changes in precision analog systems. |
| Long-Term Stability | 120 ppm after 1000 h; guarantees minimal aging-induced drift in safety-critical automotive control modules. |
Pinout & Package
TL4050B25QDCKRQ1 is packaged in SC-70-5 (DCK), a 5-pin surface-mount package measuring 2.0 mm × 2.1 mm × 0.95 mm with gull-wing leads. Pin 1 is marked by a dot; pin 3 is internally connected to pin 2 via a parasitic Schottky diode and must be floated or tied to pin 2 unless used in high-EMI environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Reference ground node; connects to system GND or low-impedance return path for stable voltage regulation. |
| Pin 2 | Cathode | Output terminal; supplies regulated 2.5 V to load and sets bias current through external series resistor. |
| Pin 3 | Internal Schottky Anode | Must be left floating or tied to pin 2; in high-EMI applications, connect to pin 1 (anode) per TI recommendation. |
| Pin 4 | No Connect | Internally unconnected; no electrical function; must remain unconnected on PCB. |
| Pin 5 | No Connect | Internally unconnected; no electrical function; must remain unconnected on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +125°C ambient, meeting reliability and stress-test requirements for engine control and ADAS modules. |
| No output capacitor required | Stable with any capacitive load; eliminates BOM cost and board space for bypass caps in space-constrained modules like battery management ICs. |
| Low 41 μVRMS noise | Enables direct interface with 16-bit SAR ADCs without additional noise filtering, reducing component count in precision instrumentation. |
| 60 μA minimum cathode current | Supports operation in always-on vehicle subsystems (e.g., door module wake-up logic) with sub-100 μA quiescent power budgets. |
| 0.3 Ω dynamic impedance | Minimizes output perturbation during fast-switching load transients in motor driver feedback loops and power-supply monitors. |
Applications
| Automotive Cabin Sensor Interface | Portable Medical Data Logger |
|---|---|
|
Use Scenario: High-accuracy cabin temperature and humidity sensing in HVAC control units using 12-bit ADCs. IC Role / Device Role / Timing Role: Provides stable 2.5 V reference for ratiometric sensor excitation and ADC conversion. Use Value: Enables ±0.1°C temperature resolution and long-term calibration stability over vehicle lifetime without recalibration. |
Use Scenario: Battery-powered ECG and SpO₂ data loggers requiring low-noise analog front-end references. IC Role / Device Role / Timing Role: Supplies clean, low-drift reference for precision analog-to-digital conversion of bio-signals. Use Value: Achieves >86 dB SNR in 16-bit sampling with <1 μV offset drift, extending usable battery life beyond 72 hours. |
| Industrial PLC Analog Input Module | Energy Meter Reference Subsystem |
|
Use Scenario: 4–20 mA loop-powered analog input cards in factory automation controllers. IC Role / Device Role / Timing Role: Serves as shunt reference for current-to-voltage conversion and ADC scaling. Use Value: Maintains ±0.05% linearity over 15-year field deployment due to 120 ppm long-term stability and 50 ppm/°C TC. |
Use Scenario: Polyphase electricity meters needing metrology-grade voltage reference for revenue-grade energy calculation. IC Role / Device Role / Timing Role: Delivers stable 2.5 V reference for sigma-delta ADCs measuring voltage and current waveforms. Use Value: Supports IEC 62053-21 Class 0.2 accuracy with <0.5 mV total error across temperature and time. |
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 | 2.5 V, ±0.2% tolerance, 50 ppm/°C TC, but higher 50 μVRMS noise and 50 μA min current; SOT-23-3 package. | Lacks AEC-Q100 qualification; not rated for automotive temperature range. | Select when automotive qualification is unnecessary and SOT-23-3 footprint is preferred over SC-70-5. |
| MAX6025AEUR+T | 2.5 V, ±0.15% tolerance, 20 ppm/°C TC, 25 μVRMS noise, but requires ≥65 μA min current and is not AEC-Q100 qualified. | Higher precision and lower noise, but limited to industrial temp range (–40°C to +85°C). | Choose for non-automotive high-precision instrumentation where tighter TC and lower noise outweigh qualification needs. |
Compared with REF3025AIDBZR and MAX6025AEUR+T, TL4050B25QDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, SC-70-5 packaging, and guaranteed 41 μVRMS noise at microamp bias-making it the only option validated for automotive-grade, space-constrained, low-power analog reference applications.
Availability
TL4050B25QDCKRQ1 is available at Aetrix Electronics and suitable for automotive electronics, portable medical devices, and industrial PLC analog input modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4050B25QDCKRQ1 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 experience in automotive-grade precision analog ICs.
The TL4050-Q1 product line was designed specifically for AEC-Q100-compliant automotive applications demanding high accuracy, low power, and robust thermal performance in harsh environments.
FAQ
What is the operating temperature range for TL4050B25QDCKRQ1?
The TL4050B25QDCKRQ1 is rated for continuous operation from –40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This range is validated across all electrical parameters including output voltage tolerance, temperature coefficient, and dynamic impedance - ensuring reliable performance in under-hood automotive applications and industrial control environments.
Does TL4050B25QDCKRQ1 require an output capacitor?
No, TL4050B25QDCKRQ1 does not require an output capacitor for stability. It is inherently stable with all capacitive loads, including direct connection to ADC reference inputs or large bulk capacitors. This eliminates the need for external bypass components, simplifying layout and reducing BOM cost in compact designs such as automotive sensor nodes.
What is the minimum cathode current needed for TL4050B25QDCKRQ1 to regulate properly?
The TL4050B25QDCKRQ1 requires a minimum cathode current of 60 μA (typical) at 25°C, rising to 65 μA across the full –40°C to +125°C range. Below this threshold, output voltage regulation degrades; proper biasing requires selecting an external series resistor that ensures this minimum current under worst-case supply and load conditions.
How is pin 3 used in the SC-70 package of TL4050B25QDCKRQ1?
In the SC-70-5 (DCK) package, TL4050B25QDCKRQ1 has a parasitic Schottky diode between pins 2 (cathode) and 3. Pin 3 must be left floating or connected to pin 2 in standard applications. In high-EMI environments (e.g., near motors or switching regulators), TI recommends connecting pin 3 to pin 1 (anode) to suppress noise coupling.
Is TL4050B25QDCKRQ1 pin-compatible with other TL4050-Q1 variants?
Yes, TL4050B25QDCKRQ1 shares identical SC-70-5 (DCK) pinout and footprint with all other TL4050x-Q1 variants in the same package - including TL4050B41QDCKRQ1 and TL4050B50QDCKRQ1. This enables drop-in replacement for different output voltages without PCB redesign, provided system-level voltage and tolerance requirements are met.
TL4050B25QDCKRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TL4050B25QDCKRQ1 FAQ
1.How can I place an order for TL4050B25QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B25QDCKRQ1 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 TL4050B25QDCKRQ1 reliable?
The price and inventory of TL4050B25QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B25QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for TL4050B25QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B25QDCKRQ1 transactions.
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4.How is shipping managed for TL4050B25QDCKRQ1?
TL4050B25QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B25QDCKRQ1 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 TL4050B25QDCKRQ1?
For technical support, including TL4050B25QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B25QDCKRQ1 requirements.
6.How does Aetrix verify that TL4050B25QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All TL4050B25QDCKRQ1 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 TL4050B25QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of TL4050B25QDCKRQ1?
All TL4050B25QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B25QDCKRQ1, 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 TL4050B25QDCKRQ1 part is unused and in its original packaging.
Return procedure for TL4050B25QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050B25QDCKRQ1 Tags
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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
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AZ431LANTR-G1
Diodes Incorporated
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