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Texas Instruments TL4050A41QDCKR
- Part No.:
- TL4050A41QDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
TL4050A41QDCKR.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,298
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Product details
Overview
TL4050A41QDCKR from Texas Instruments is a precision micropower shunt voltage reference with 4.096 V nominal output, ±0.1% initial tolerance (A grade), 50 ppm/°C max temperature coefficient, 93 μVRMS 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.
For engineers reviewing the TL4050A41QDCKR datasheet, TL4050A41QDCKR pinout, TL4050A41QDCKR application, or TL4050A41QDCKR equivalent, key selection criteria include guaranteed extended-temperature performance, low cathode current requirement (68 μA typ), stability with all capacitive loads, and SC-70 package compatibility for space-constrained designs.
Technical Context
The TL4050A41QDCKR operates as a two-terminal shunt reference requiring no external output capacitor and maintaining regulation over cathode currents from 68 μA to 15 mA. Its internal bandgap architecture delivers 4.096 V with thermal hysteresis of 1.148 mV and long-term stability of 120 ppm after 1000 hours.
Designed for extended-temperature applications, it features reverse dynamic impedance of 0.5 Ω at 1 mA/120 Hz and supports load regulation within ±0.9 mV over 1 mA to 15 mA cathode current range - critical for precision data acquisition systems where supply headroom is limited.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V at IZ = 100 μA - matches 12-bit ADC full-scale LSB = 1 mV when powered from 5 V. |
| Initial Tolerance | ±0.1% max at 25°C - enables direct use in 12-bit systems without trimming. |
| Temp Coefficient | ±50 ppm/°C max over –40°C to 125°C - ensures ≤ ±0.5 mV drift across full operating range. |
| Noise (10 Hz–10 kHz) | 93 μVRMS - contributes <0.023 LSB RMS noise in 12-bit, 4.096 V FS system. |
| Min Cathode Current | 68 μA typical - allows ultra-low-power operation in battery-backed sensors. |
| Dynamic Impedance | 0.5 Ω at 1 mA - minimizes output voltage shift under dynamic load transients. |
| Thermal Hysteresis | 1.148 mV - quantifies reversible voltage shift after thermal cycling between –40°C and 125°C. |
Pinout & Package
TL4050A41QDCKR is housed in a 3-pin SC-70 (DCK) package with exposed pad for thermal enhancement. 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 design guidance).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connected to load and external series resistor; sinks total current (IZ + IL) to maintain regulated voltage. |
| Anode (Pin 2) | Ground reference terminal | Common return path; must be connected to system ground with low-impedance trace to minimize noise coupling. |
| NC (Pin 3) | No internal connection | Parasitic Schottky diode exists between Pins 2 and 3; Pin 3 must not be used as signal or power node. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output bypass capacitor - reduces BOM count and PCB area in portable designs. |
| Extended temperature range | Rated for –40°C to 125°C ambient - qualified for under-hood automotive and industrial control environments. |
| Low micropower operation | 68 μA typical minimum cathode current - extends battery life in wireless sensor nodes and handheld meters. |
| Low wideband noise | 93 μVRMS (10 Hz–10 kHz) - preserves SNR in precision audio and high-resolution data converters. |
| Fixed 4.096 V output | Exact match for 12-bit systems with 5 V supply - yields integer 1 mV/LSB scaling without software correction. |
Applications
| Data-Acquisition Systems | Automotive Power-Supply Monitors |
|---|---|
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) sampling analog sensor signals in portable test equipment. IC Role / Device Role / Timing Role: Provides precise 4.096 V reference voltage for ADC full-scale range. Use Value: Enables 1 mV/LSB resolution without calibration; low noise preserves effective number of bits (ENOB). | Use Scenario: Monitoring 12 V battery and 5 V rail voltage in engine control units (ECUs) operating at 125°C ambient. IC Role / Device Role / Timing Role: Shunt reference for comparator-based overvoltage/undervoltage detection circuitry. Use Value: Guaranteed operation up to 125°C eliminates derating; ±0.1% tolerance ensures accurate fault thresholds. |
| Portable Instrumentation | Energy Management Systems |
Use Scenario: Handheld multimeter with dual-range analog front-end requiring stable reference for autoranging. IC Role / Device Role / Timing Role: Primary voltage reference for precision gain-setting and offset calibration. Use Value: Low 68 μA min current extends alkaline battery life beyond 500 hours; SC-70 footprint saves board space. | Use Scenario: Smart metering IC measuring grid voltage and current with metrology-grade accuracy requirements. IC Role / Device Role / Timing Role: Reference source for isolated sigma-delta ADCs in revenue-grade energy measurement subsystems. Use Value: 120 ppm long-term stability ensures calibration validity over 10-year field deployment without recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBVR | 4.096 V, ±0.2% initial tolerance, 50 ppm/°C, SC-70, but requires ≥100 μA min cathode current. | Higher min current increases power consumption in ultra-low-power designs. | Choose REF3040AIDBVR only if tighter long-term stability (50 ppm vs. 120 ppm) is prioritized over micropower operation. |
| MAX6008AEUR+T | 4.096 V, ±0.2% initial tolerance, 75 ppm/°C, SOT-23-3, 100 μA min current, higher 120 μVRMS noise. | Higher tempco and noise limit use in 12-bit+ systems at temperature extremes. | Select MAX6008AEUR+T only for cost-sensitive industrial applications where 125°C operation is not required. |
Compared with REF3040AIDBVR and MAX6008AEUR+T, TL4050A41QDCKR uniquely combines A-grade accuracy, extended-temperature qualification, and sub-70 μA minimum cathode current - making it the optimal choice for battery-powered, high-precision, automotive-qualified systems.
Availability
TL4050A41QDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, automotive electronics, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4050A41QDCKR 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 was designed specifically for high-accuracy, low-power shunt reference applications in harsh-environment systems - emphasizing extended temperature operation, micropower efficiency, and robustness across capacitive loading conditions.
FAQ
What is the guaranteed operating temperature range for TL4050A41QDCKR?
The TL4050A41QDCKR is fully specified and tested over an ambient temperature range of –40°C to 125°C, as indicated by the "Q" suffix in the part number. This extended range qualifies it for under-hood automotive, industrial control, and outdoor instrumentation applications where thermal stress exceeds standard industrial limits.
Does TL4050A41QDCKR require an output capacitor for stability?
No, TL4050A41QDCKR does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including direct connection to ADC reference inputs or large bulk capacitance. Adding a capacitor is optional and only beneficial for additional high-frequency noise filtering.
What is the minimum cathode current needed for TL4050A41QDCKR to maintain regulation?
The TL4050A41QDCKR requires a minimum cathode current of 68 μA (typical) at 25°C, with a maximum of 78 μA across the full –40°C to 125°C range. Below this threshold, the device exits regulation and output voltage drops nonlinearly - critical for battery-life calculations in always-on sensor nodes.
How does the 4.096 V output of TL4050A41QDCKR benefit 12-bit data acquisition systems?
The 4.096 V output of TL4050A41QDCKR yields exactly 1 mV per LSB when used with a 5 V digital supply in a 12-bit ADC (212 = 4096). This eliminates fractional LSB scaling errors and simplifies firmware calibration - a key advantage confirmed in TI's ADS7842 reference design using TL4050A41QDCKR.
Can TL4050A41QDCKR be used in place of TL4050A41IDCKR?
Yes, TL4050A41QDCKR can replace TL4050A41IDCKR in any design, as both share identical electrical specifications except for temperature rating: the "Q" version adds guaranteed operation up to 125°C versus 85°C for the "I" version. No layout or circuit changes are required - the SC-70 package, pinout, and biasing are identical.
TL4050A41QDCKR 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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- 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
TL4050A41QDCKR FAQ
1.How can I place an order for TL4050A41QDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A41QDCKR 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 TL4050A41QDCKR reliable?
The price and inventory of TL4050A41QDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A41QDCKR is usually 5 days.
3.What payment methods are accepted for TL4050A41QDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050A41QDCKR transactions.
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4.How is shipping managed for TL4050A41QDCKR?
TL4050A41QDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050A41QDCKR 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 TL4050A41QDCKR?
For technical support, including TL4050A41QDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A41QDCKR requirements.
6.How does Aetrix verify that TL4050A41QDCKR is sourced from the original manufacturer or authorized distributors?
All TL4050A41QDCKR 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 TL4050A41QDCKR meets industry standards.
7.What is the process for return or replacement of TL4050A41QDCKR?
All TL4050A41QDCKR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A41QDCKR, 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 TL4050A41QDCKR part is unused and in its original packaging.
Return procedure for TL4050A41QDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A41QDCKR Tags
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TL431AIDBZR
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TL431BQDBZR
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LM4040DIM3X-2.5/NOPB
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