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Texas Instruments TL4050B41QDCKR
- Part No.:
- TL4050B41QDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4050B41QDCKR.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,123
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Product details
Overview
TL4050B41QDCKR 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 data acquisition, battery-powered instrumentation, and automotive power-supply monitors.
For engineers reviewing the TL4050B41QDCKR datasheet, TL4050B41QDCKR pinout, TL4050B41QDCKR application, or TL4050B41QDCKR equivalent, key selection criteria include its SC-70 package, cathode/anode two-terminal topology, low 68μA typical minimum cathode current, stability without output capacitor, and compatibility with 12-bit ADC systems requiring 1mV LSB resolution.
Technical Context
The TL4050B41QDCKR implements a bandgap-based shunt reference architecture with low dynamic impedance (0.5Ω at 1mA) and thermal hysteresis of 1.148mV over –40°C to 125°C cycling. Its reverse breakdown voltage is specified at 100μA test current and maintains tight regulation across 68μA–15mA cathode current range.
Designed for extended-temperature operation, it features ESD ratings of ±2000V HBM and ±500V CDM, and requires no external compensation-remaining stable with all capacitive loads. The device's 4.096V output enables direct 12-bit full-scale mapping with 5V supplies, eliminating scaling resistors in precision analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; enables exact 1mV LSB in 12-bit systems with 5V supply |
| Initial Tolerance | ±0.2% max (B grade); supports mid-tier precision without A-grade cost premium |
| Temp Coefficient | ±50ppm/°C max; contributes ≤0.5mV drift over –40°C to 125°C ambient |
| Noise (10Hz–10kHz) | 93μVRMS typical; limits RMS error to <0.02% of full scale in sensitive measurements |
| Min Cathode Current | 68μA typical; allows ultra-low-power operation in battery-backed monitoring circuits |
| Operating Temp Range | –40°C to 125°C; qualified for under-hood automotive and industrial control environments |
| Dynamic Impedance | 0.5Ω at 1mA; ensures <0.5mV load-regulation shift per 1mA cathode current change |
Pinout & Package
TL4050B41QDCKR is housed in a 3-pin SC-70 (DCK) package - a 2.0mm × 2.1mm surface-mount outline with gull-wing leads. Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is NC (no internal connection; must be left floating or tied to Pin 2 per TI design guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground return path | Connected to system ground; forms low-impedance return for cathode current and load current |
| Cathode (Pin 2) | Regulated output node | Supplies reference voltage to ADC/DAC; sinks total current (IZ + IL) from series resistor RS |
| NC (Pin 3) | No internal connection | Must remain unconnected or shorted to Pin 2; parasitic Schottky diode exists between Pins 2–3 in SOT-23 variant only |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load - eliminates need for output bypass capacitor in space-constrained designs |
| Micropower operation | 68μA typical minimum cathode current enables >10-year battery life in always-on sensor nodes |
| Extended temperature qualification | Specified and tested from –40°C to 125°C - suitable for engine control units and industrial PLCs |
| Low noise performance | 93μVRMS (10Hz–10kHz) supports sub-12-bit ENOB preservation in precision SAR ADCs |
| Two-terminal simplicity | Requires only one external resistor (RS) for biasing - reduces BOM count and layout complexity vs. three-terminal references |
Applications
| Data Acquisition Systems | Automotive Power-Supply Monitors |
|---|---|
Use Scenario: 12-bit ADC sampling of battery voltage, temperature, and pressure sensors in portable test equipment. IC Role / Device Role / Timing Role: Provides 4.096V reference for ADS7842-type converters, enabling 1mV LSB resolution without gain calibration. Use Value: Eliminates scaling resistors and reduces offset drift contribution to <±0.5 LSB over temperature. |
Use Scenario: Real-time monitoring of 12V rail integrity in ADAS domain controllers during cold cranking. IC Role / Device Role / Timing Role: Shunt reference in comparator-based undervoltage lockout circuit with fast response to rail collapse. Use Value: Stable 4.096V threshold ensures consistent trip point across –40°C to 125°C, preventing false resets. |
| Portable Instrumentation | Industrial Process Controllers |
Use Scenario: Handheld multimeter with autoranging and auto-zero functions powered by dual AA cells. IC Role / Device Role / Timing Role: Precision reference for dual-slope integrator and display driver DAC. Use Value: 68μA min current allows operation down to 1.8V supply; low noise preserves 4½-digit accuracy. |
Use Scenario: 4–20mA transmitter loop-powered by 24V DC, requiring stable reference for current-setting DAC. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing precise 4.096V for 16-bit DAC reference input. Use Value: SC-70 footprint saves PCB area in DIN-rail modules; extended temp rating avoids derating in enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 3-pin SOT-23, 4.096V, ±0.2%, 50ppm/°C, 48μVRMS noise, 50μA min current | Lower noise and lower quiescent current, but requires separate ground pin - not two-terminal compatible | Select when lowest noise and lowest power are critical, and board layout permits 3-pin routing |
| LM4040C41IDCKR | SC-70, 4.096V, ±0.5%, 100ppm/°C, 35μVRMS noise, 60μA min current | Looser initial tolerance and higher tempco, but lower noise and wider current range (60μA–15mA) | Select for cost-sensitive industrial applications where ±0.5% tolerance is acceptable and noise is priority |
Compared with REF3040AIDBZR and LM4040C41IDCKR, TL4050B41QDCKR uniquely combines true two-terminal operation, extended temperature qualification (–40°C to 125°C), and B-grade precision in SC-70 - making it optimal for space-constrained, high-reliability shunt reference implementations where pin count and thermal robustness are decisive.
Availability
TL4050B41QDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, automotive power-supply monitors, and industrial process controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4050B41QDCKR 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 delivering analog and embedded processing solutions, with leadership in precision analog, power management, and signal chain technologies.
The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power, two-terminal shunt reference applications in harsh thermal environments and portable instrumentation.
FAQ
What is the operating temperature range for TL4050B41QDCKR?
The TL4050B41QDCKR is characterized for operation from –40°C to 125°C, meeting extended-temperature requirements for automotive under-hood electronics and industrial control systems. This range is explicitly defined in Section 5.7 of the datasheet for the Q-grade variant, and the device is tested across this full span for parameters including output voltage, temperature coefficient, and dynamic impedance.
Does TL4050B41QDCKR require an output capacitor?
No, TL4050B41QDCKR does not require an output capacitor for stability. As confirmed in Section 8.1 and Section 3 of the datasheet, it is designed to remain stable with all capacitive loads - including zero capacitance - eliminating the need for external bypass components in compact or ultra-low-power designs.
What is the minimum cathode current needed for TL4050B41QDCKR to regulate properly?
The TL4050B41QDCKR requires a minimum cathode current of 68μA (typical) and 78μA (max over temperature) to maintain regulation. This value is specified in Table 5.7 (TL4050x41Q Electrical Characteristics) and determines the maximum value of the series bias resistor RS in shunt regulator configurations.
How does TL4050B41QDCKR achieve 1mV LSB resolution in 12-bit data acquisition?
TL4050B41QDCKR delivers exactly 4.096V output, which - when used with a 5V-supplied 12-bit ADC like the ADS7842 - yields a 1mV least-significant bit (LSB = 5V / 4096). This eliminates scaling errors and simplifies firmware calibration, as confirmed in Figure 8-2 and Section 8.3 of the datasheet.
Is TL4050B41QDCKR pin-compatible with other TL4050 variants in SC-70?
Yes, all TL4050 variants in the SC-70 (DCK) package - including TL4050A41QDCKR, TL4050C41QDCKR, and TL4050B41QDCKR - share identical pinout (Anode–Cathode–NC), mechanical footprint, and solder reflow profile. Only electrical specifications (tolerance, noise, min current) differ between grades.
TL4050B41QDCKR 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
TL4050B41QDCKR FAQ
1.How can I place an order for TL4050B41QDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B41QDCKR 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 TL4050B41QDCKR reliable?
The price and inventory of TL4050B41QDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B41QDCKR is usually 5 days.
3.What payment methods are accepted for TL4050B41QDCKR?
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4.How is shipping managed for TL4050B41QDCKR?
TL4050B41QDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B41QDCKR 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 TL4050B41QDCKR?
For technical support, including TL4050B41QDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B41QDCKR requirements.
6.How does Aetrix verify that TL4050B41QDCKR is sourced from the original manufacturer or authorized distributors?
All TL4050B41QDCKR 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 TL4050B41QDCKR meets industry standards.
7.What is the process for return or replacement of TL4050B41QDCKR?
All TL4050B41QDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B41QDCKR, 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 TL4050B41QDCKR part is unused and in its original packaging.
Return procedure for TL4050B41QDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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