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Texas Instruments TL4050A25IDBZR
- Part No.:
- TL4050A25IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050A25IDBZR.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,477
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Product details
Overview
TL4050A25IDBZR from Texas Instruments is a precision 2.5V shunt voltage reference in SOT-23-3 package, featuring ±0.1% initial tolerance, 50ppm/°C max temperature coefficient, 41μVRMS wideband noise, 60μA typical minimum cathode current, and operation from –40°C to 85°C. It serves as a stable reference for high-resolution ADCs, portable power monitors, and battery-powered instrumentation.
For engineers reviewing the TL4050A25IDBZR datasheet, TL4050A25IDBZR pinout, TL4050A25IDBZR application, or TL4050A25IDBZR equivalent, this page delivers verified electrical characteristics, thermal hysteresis (0.7mV), dynamic impedance (0.3Ω), long-term stability (120ppm), and cathode current range (60μA–15mA) - all critical for low-drift analog signal chains.
Technical Context
The TL4050A25IDBZR operates as a two-terminal shunt reference, requiring only an external series resistor to regulate cathode current between 60μA and 15mA. Its bandgap-derived core delivers stable 2.5V output across full industrial temperature range without external capacitors.
It exhibits low dynamic impedance (0.3Ω at 1mA/120Hz) and minimal voltage variation with load current (≤8mV over 1mA–15mA), enabling precise biasing in high-accuracy data acquisition and closed-loop feedback systems where supply headroom is constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal; maintains accuracy within ±2.5mV at 25°C and ±11mV over –40°C to 85°C - enables 12-bit ADC full-scale reference without trimming. |
| Initial Tolerance | ±0.1% max (A grade); ensures ≤2.5mV absolute error at room temperature - suitable for metrology-grade calibration references. |
| Temp Coefficient | ±50ppm/°C max; contributes ≤1.25mV drift over 85°C span - supports stable performance in unregulated ambient environments. |
| Noise (10Hz–10kHz) | 41μVRMS typical; adds <0.025 LSB noise to 16-bit 2.5V-range ADCs - preserves effective resolution in precision digitization. |
| Dynamic Impedance | 0.3Ω at 1mA/120Hz; minimizes output perturbation under fast load transients - critical for multiplexed sensor front-ends. |
| Cathode Current Range | 60μA (typ) to 15mA; allows ultra-low-power operation in battery systems while supporting high-current DAC buffers. |
| Thermal Hysteresis | 0.7mV; limits repeatability error after thermal cycling - essential for applications requiring consistent post-thermal calibration. |
Pinout & Package
SOT-23-3 package (DBZ): compact 2.92mm × 1.3mm footprint with gull-wing leads, rated for surface-mount reflow. Thermal resistance θJA = 206°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connected to system ground; forms return path for cathode current - must be low-impedance to avoid ground bounce errors. |
| Cathode (Pin 2) | Output voltage node | Delivers regulated 2.5V; sinks total current (load + reference bias) - requires series resistor (RS) to limit IZ ≤15mA. |
| NC / Floating (Pin 3) | Unused terminal | No internal connection; must remain unconnected or tied to Pin 2 per TI recommendation to avoid parasitic Schottky conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates stably with any capacitive load - eliminates BOM cost and layout area for bypass caps in space-constrained designs. |
| Micropower operation | 60μA typical minimum cathode current - extends battery life in portable multimeters and wireless sensors beyond 10 years at 1-sample/sec. |
| Wide current range | Functional from 60μA to 15mA - supports both ultra-low-power sleep modes and high-drive buffer stages without redesign. |
| Low thermal hysteresis | 0.7mV max after –40°C ↔ 125°C cycling - ensures repeatable reference voltage in automotive engine control units during thermal soak cycles. |
| ESD robustness | ±2000V HBM rating - withstands handling in standard manufacturing environments without special ESD controls. |
Applications
| Data-Acquisition Systems | Portable Power-Supply Monitors |
|---|---|
Use Scenario: 16-bit SAR ADC sampling thermocouple or strain-gauge signals in handheld test equipment. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for ADC full-scale range, directly determining measurement resolution and absolute accuracy. Use Value: ±0.1% tolerance and 41μVRMS noise enable <1LSB integral nonlinearity and maintain ENOB >15.2 bits over temperature. |
Use Scenario: Real-time monitoring of Li-ion cell voltage in battery management ICs for medical wearables. IC Role / Device Role / Timing Role: Supplies precision reference to comparator or ADC measuring cell voltage with ±1mV resolution. Use Value: 60μA min cathode current allows operation from 3.0V supply with 100kΩ series resistor - extending runtime by >30% vs. higher-IQ references. |
| Industrial Process Controllers | Automotive Cabin Electronics |
Use Scenario: 4–20mA transmitter loop powering remote pressure sensors in factory automation. IC Role / Device Role / Timing Role: Sets reference for DAC generating loop current; drift directly impacts field calibration validity. Use Value: ±50ppm/°C tempco and 0.7mV thermal hysteresis ensure <±0.05% full-scale error over 40°C operating range - meeting SIL-2 functional safety requirements. |
Use Scenario: Reference for HVAC control MCU ADC measuring cabin temperature via NTC thermistor network. IC Role / Device Role / Timing Role: Stabilizes analog front-end against vehicle battery fluctuations and under-hood thermal gradients. Use Value: Stable 2.5V output over –40°C to 85°C with no external capacitor simplifies layout in tight dashboard PCBs and reduces component count by one. |
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% initial tolerance, 50ppm/°C, 22μVRMS noise, SOT-23-3, 50μA min IZ | Lower noise but looser tolerance; not qualified for extended temp range | Prefer when ultra-low noise dominates over absolute accuracy in lab-grade instruments. |
| MAX6002AEUR+T | 2.5V, ±0.1% tolerance, 75ppm/°C, 50μVRMS noise, SOT-23-3, 65μA min IZ | Higher tempco and noise; wider supply range (up to 12.6V) | Choose when operating from higher-voltage rails where TL4050A25IDBZR's 15mA IZ,max is limiting. |
Compared with REF3025AIDBZR and MAX6002AEUR+T, TL4050A25IDBZR offers the best balance of tight tolerance, low hysteresis (0.7mV), and proven stability across industrial temperature extremes - making it optimal for production-critical embedded systems demanding long-term calibration integrity.
Availability
TL4050A25IDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, portable power-supply monitors, and industrial process controllers requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TL4050A25IDBZR 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 for industrial, automotive, and consumer markets.
The TL4050 series was designed specifically for micropower, high-accuracy shunt reference applications where board space, thermal stability, and long-term drift are critical - targeting portable instrumentation, battery-powered sensors, and ruggedized control systems.
FAQ
What is the maximum cathode current rating for TL4050A25IDBZR?
The absolute maximum cathode current for TL4050A25IDBZR is 15mA, as specified in the Absolute Maximum Ratings table. Operation above this level risks permanent damage due to junction overheating. For reliable long-term performance, design cathode current between 60μA (minimum) and 12mA (recommended upper limit), ensuring power dissipation stays below 37.5mW at 2.5V.
Does TL4050A25IDBZR require an output capacitor for stability?
No, TL4050A25IDBZR 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 op-amp feedback networks. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability - simplifying layout and reducing BOM count.
What is the thermal hysteresis specification for TL4050A25IDBZR?
TL4050A25IDBZR has a thermal hysteresis of 0.7mV, defined as the difference in 25°C output voltage measured after cycling from –40°C versus after cycling from 125°C. This low hysteresis ensures repeatable reference voltage in applications subject to repeated thermal cycling, such as automotive ECUs or outdoor industrial controllers.
Can TL4050A25IDBZR operate across the full –40°C to 125°C range?
No - TL4050A25IDBZR is rated for operation from –40°C to 85°C (industrial temperature range). For extended temperature operation up to 125°C, the Q-grade variant TL4050A25QDBZR must be used. Using TL4050A25IDBZR beyond 85°C violates its qualified operating conditions and may result in parametric shift or accelerated aging.
How does the pin configuration of TL4050A25IDBZR differ from standard three-terminal references?
TL4050A25IDBZR uses a two-terminal functional configuration within a three-pin SOT-23-3 package: Pin 1 (Anode) and Pin 2 (Cathode) are active; Pin 3 is internally unconnected and must remain floating or tied to Pin 2 to prevent unintended conduction through the parasitic Schottky diode present in the DBZ package. This differs from series references that require separate input, output, and ground pins.
TL4050A25IDBZR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- ±0.1%
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050A25IDBZR FAQ
1.How can I place an order for TL4050A25IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A25IDBZR 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 TL4050A25IDBZR reliable?
The price and inventory of TL4050A25IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A25IDBZR is usually 5 days.
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TL4050A25IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050A25IDBZR 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 TL4050A25IDBZR?
For technical support, including TL4050A25IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A25IDBZR requirements.
6.How does Aetrix verify that TL4050A25IDBZR is sourced from the original manufacturer or authorized distributors?
All TL4050A25IDBZR 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 TL4050A25IDBZR meets industry standards.
7.What is the process for return or replacement of TL4050A25IDBZR?
All TL4050A25IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A25IDBZR, 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 TL4050A25IDBZR part is unused and in its original packaging.
Return procedure for TL4050A25IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A25IDBZR Tags
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TL431AIDBZR
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TL431BQDBZR
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AZ431LANTR-G1
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