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Texas Instruments TL4050B41QDCKT
- Part No.:
- TL4050B41QDCKT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4050B41QDCKT.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,663
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Product details
Overview
TL4050B41QDCKT from Texas Instruments is a precision micropower shunt voltage reference with 4.096V nominal output, ±0.2% initial tolerance (B grade), 50ppm/°C max temperature coefficient, 93μVRMS wideband noise, and operation across –40°C to 125°C. It serves as a stable reference in high-resolution ADCs, battery-powered instrumentation, and automotive power-supply monitors where low drift and minimal quiescent current are critical.
For engineers reviewing the TL4050B41QDCKT datasheet, TL4050B41QDCKT pinout, TL4050B41QDCKT application, or TL4050B41QDCKT equivalent, key selection factors include its SC-70 package, cathode/anode two-terminal topology, 52–78μA minimum cathode current range, stability with all capacitive loads, and compatibility with 12-bit data-acquisition systems requiring 1mV LSB resolution.
Technical Context
The TL4050B41QDCKT implements a bandgap-based shunt reference architecture with low dynamic impedance (0.5Ω at 1mA) and inherent stability over full load capacitance - eliminating need for external output capacitors. Its thermal hysteresis is specified at 1.148mV across –40°C to 125°C cycling, and long-term stability is 120ppm after 1000 hours.
Designed for extended-temperature operation, the Q-grade variant meets automotive and industrial requirements with guaranteed performance from –40°C to 125°C ambient. The device maintains tight output regulation across cathode currents from 52μA (min) to 15mA, with voltage change ≤10mV over that range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal - enables exact 1mV LSB in 12-bit ADCs powered from 5V supplies. |
| Initial Tolerance | ±0.2% max at 25°C - defines worst-case DC error before temperature or aging effects. |
| Temp Coefficient | ±50ppm/°C max - contributes ≤0.51mV drift over full –40°C to 125°C range. |
| Noise (10Hz–10kHz) | 93μVRMS typical - limits effective resolution in precision measurement front-ends. |
| Min Cathode Current | 52μA typical / 78μA max over temp - sets minimum bias requirement for stable regulation. |
| Dynamic Impedance | 0.5Ω at 1mA - ensures low AC output impedance for fast transient rejection. |
| Thermal Hysteresis | 1.148mV - quantifies reversible voltage shift after temperature cycling, critical for calibration stability. |
Pinout & Package
TL4050B41QDCKT is housed in a 3-pin SC-70 (DCK) package, measuring 2.0mm × 2.1mm × 0.9mm. Pin 1 is Cathode, Pin 2 is Anode, and Pin 3 is NC (no internal connection; must be left floating or tied to Pin 2 per TI guidance due to parasitic Schottky diode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Current-sink terminal; voltage is regulated relative to Anode; connects to ADC VREF or feedback network. |
| Anode (Pin 2) | Reference ground reference | Return path for cathode current; must be connected to system ground or low-impedance analog ground. |
| NC (Pin 3) | No internal connection | Parasitic Schottky diode exists between Pins 2 and 3; Pin 3 must not be used as signal node - float or tie to Pin 2. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates mandatory output capacitor - simplifies layout and reduces BOM count in space-constrained designs. |
| Low micropower operation | Typical 52μA min cathode current enables >10-year battery life in always-on sensor nodes. |
| Extended temperature range | –40°C to 125°C operation supports under-hood automotive and industrial control applications. |
| Low wideband noise | 93μVRMS (10Hz–10kHz) preserves SNR in 16-bit+ data acquisition without post-filtering. |
| Two-terminal topology | Reduces PCB footprint vs. three-terminal references; simplifies biasing in shunt regulator configurations. |
Applications
| Data-Acquisition Systems | Automotive Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 12-bit SAR ADC (e.g., ADS7842) in portable test equipment requiring precise 4.096V reference for 1mV LSB. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable, low-noise VREF input to ADC's reference pin. Use Value: Enables full-scale utilization of 12-bit converter without gain/offset calibration; 93μVRMS noise avoids resolution loss. | Use Scenario: Monitoring 12V battery rail in engine control units (ECUs) operating across –40°C to 125°C ambient. IC Role / Device Role / Timing Role: Precision reference for comparator or ADC measuring battery voltage against known threshold. Use Value: ±0.2% tolerance and ±50ppm/°C TC ensure <±15mV total error over full temperature range - sufficient for OBD-II compliance thresholds. |
| Portable Instrumentation | Energy Management Systems |
Use Scenario: Handheld multimeter with auto-ranging analog front-end requiring stable reference across battery discharge cycle. IC Role / Device Role / Timing Role: Primary voltage reference for dual-slope or sigma-delta ADC subsystem. Use Value: 52μA min cathode current allows operation down to 2.7V supply with series resistor - extends usable battery life by >30% vs. higher-current references. | Use Scenario: Smart meter monitoring grid voltage and current using isolated ADCs with local reference. IC Role / Device Role / Timing Role: Local shunt reference for secondary-side ADC in isolated power monitoring stage. Use Value: SC-70 package and no-output-capacitor requirement reduce isolation barrier component count and creepage/clearance complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050A41QDCKT | 0.1% initial tolerance (vs. 0.2%); otherwise identical electrical specs and package. | Suitable where tighter initial accuracy is required for factory calibration or reduced software trimming. | Select TL4050A41QDCKT when absolute DC accuracy dominates cost sensitivity; TL4050B41QDCKT offers optimal balance for production-grade instrumentation. |
| REF3040AIDBZR | 3-pin SOT-23; 4.096V; 0.2% tolerance; 50ppm/°C; but higher 48μA typical IQ and requires output capacitor for stability. | Not drop-in compatible due to different pinout (Anode/Cathode/GND vs. Cathode/Anode/NC) and stability requirements. | Choose REF3040AIDBZR only if GND-referenced topology is preferred; TL4050B41QDCKT provides simpler two-terminal implementation with superior capacitive-load immunity. |
Compared with TL4050A41QDCKT, TL4050B41QDCKT trades 0.1% initial accuracy for lower cost while retaining identical temperature performance and noise; versus REF3040AIDBZR, it eliminates output capacitor dependency and uses a more compact two-terminal configuration ideal for retrofit or space-limited designs.
Availability
TL4050B41QDCKT is available at Aetrix Electronics and suitable for data-acquisition systems, automotive power-supply monitors, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4050B41QDCKT 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, embedded processing, and digital signal processing technologies, with leadership in precision analog ICs since 1930.
The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power, and extended-temperature applications in industrial, automotive, and portable measurement systems.
FAQ
What is the operating temperature range of TL4050B41QDCKT?
The TL4050B41QDCKT is qualified for operation from –40°C to +125°C ambient temperature, meeting extended-temperature requirements for automotive under-hood and industrial control applications. This rating is confirmed in Section 5.7 of the official TI datasheet (SLOS486B), which specifies electrical characteristics across this full range.
Does TL4050B41QDCKT require an external output capacitor?
No, TL4050B41QDCKT does not require an external output capacitor for stability. As stated in Section 8.1 of the TI datasheet, it is designed to remain stable with all capacitive loads - including zero capacitance - making it ideal for space-constrained or ultra-low-power designs where board area and component count must be minimized.
What is the minimum cathode current needed for TL4050B41QDCKT to regulate properly?
The TL4050B41QDCKT requires a minimum cathode current of 52μA (typical) at 25°C, rising to 78μA maximum across the full –40°C to 125°C temperature range. This value is specified in Table 5.7 (TL4050x41Q Electrical Characteristics) and determines the smallest bias resistor value usable in shunt regulator configurations.
How does TL4050B41QDCKT compare to TL4050B41IDCKT in terms of temperature rating?
TL4050B41QDCKT is rated for –40°C to 125°C operation (Q-grade), whereas TL4050B41IDCKT is rated only for –40°C to 85°C (I-grade). Both share identical electrical specifications at 25°C, but the Q-grade version guarantees performance across the wider automotive and industrial temperature envelope - critical for under-hood or high-ambient environments.
What is the purpose of Pin 3 on TL4050B41QDCKT?
Pin 3 of TL4050B41QDCKT is a no-connect (NC) terminal with no internal connection. However, TI documentation (Section 8.2) warns of a parasitic Schottky diode between Pins 2 (Anode) and 3; therefore, Pin 3 must either be left floating or tied directly to Pin 2 (Anode) - never used as an independent signal node.
TL4050B41QDCKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
TL4050B41QDCKT FAQ
1.How can I place an order for TL4050B41QDCKT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B41QDCKT 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 TL4050B41QDCKT reliable?
The price and inventory of TL4050B41QDCKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B41QDCKT is usually 5 days.
3.What payment methods are accepted for TL4050B41QDCKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B41QDCKT transactions.
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4.How is shipping managed for TL4050B41QDCKT?
TL4050B41QDCKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B41QDCKT 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 TL4050B41QDCKT?
For technical support, including TL4050B41QDCKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B41QDCKT requirements.
6.How does Aetrix verify that TL4050B41QDCKT is sourced from the original manufacturer or authorized distributors?
All TL4050B41QDCKT 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 TL4050B41QDCKT meets industry standards.
7.What is the process for return or replacement of TL4050B41QDCKT?
All TL4050B41QDCKT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B41QDCKT, 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 TL4050B41QDCKT part is unused and in its original packaging.
Return procedure for TL4050B41QDCKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050B41QDCKT Tags
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LM4040DIM3X-2.5/NOPB
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