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Texas Instruments TL4050C25IDBZR
- Part No.:
- TL4050C25IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050C25IDBZR.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,334
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Product details
Overview
TL4050C25IDBZR from Texas Instruments is a precision 2.5V shunt voltage reference in SOT-23-3 package, rated for industrial temperature range (–40°C to 85°C), with ±0.5% initial tolerance, 50ppm/°C temperature coefficient, 41μVRMS wideband noise, and stable operation down to 60μA cathode current. It serves as a low-power, high-stability reference in ADC/DAC biasing, power-supply monitoring, and portable instrumentation.
For engineers reviewing the TL4050C25IDBZR datasheet, TL4050C25IDBZR pinout, TL4050C25IDBZR application, or TL4050C25IDBZR equivalent, key selection criteria include its 2.5V fixed output, C-grade accuracy, SOT-23-3 footprint compatibility, no-output-capacitor stability, and suitability for space-constrained, battery-powered precision analog systems.
Technical Context
The TL4050C25IDBZR operates as a two-terminal shunt reference requiring only an external series resistor to regulate cathode current between 60μA and 15mA. Its internal bandgap core delivers stable 2.5V reverse breakdown voltage across full industrial temperature range with low dynamic impedance (0.3Ω at 1mA) and minimal thermal hysteresis (0.7mV).
Designed for direct replacement of older references like LM385-2.5, it eliminates need for output capacitors while maintaining stability under all capacitive loads - a critical advantage in high-EMI environments and compact PCB layouts where layout parasitics dominate.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal; enables precise 12-bit ADC LSB alignment (e.g., 1mV step with 4.096V reference scaled to 2.5V system rails) |
| Initial Tolerance | ±0.5% max at 25°C; defines worst-case DC offset in calibration-critical signal chains without trimming |
| Temp Coefficient | 50ppm/°C max over –40°C to 85°C; contributes ≤1.25mV drift across full range, supporting <12-bit stability |
| Noise (10Hz–10kHz) | 41μVRMS typical; limits RMS error to <0.02% of 2.5V output, preserving SNR in 16-bit data acquisition |
| Min Cathode Current | 60μA typical; allows operation from microamp-level bias sources, ideal for ultra-low-power sensor nodes |
| Dynamic Impedance | 0.3Ω at 1mA; ensures <0.3mV load-regulation error for 1mA current variations, critical for varying DAC reference loads |
| Long-Term Stability | 120ppm over 1000h; corresponds to ~3μV drift/year, supporting 10+ year field reliability in metering applications |
Pinout & Package
SOT-23-3 package: 2.92mm × 1.3mm × 1.02mm body, surface-mount, lead-free, RoHS-compliant. Thermal resistance θJA = 206°C/W (DBZ).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground terminal | Connected to system GND; forms return path for cathode current and load current |
| Cathode (Pin 2) | Output voltage node | Provides regulated 2.5V; must be biased via external resistor from supply; sinks total load + reference current |
| NC / Floating (Pin 3) | Unused terminal | Internally unconnected; must remain floating or tied to Pin 2 per TI recommendation to avoid Schottky diode conduction |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load up to 10µF, eliminating BOM cost and board area for bypass caps in space-limited designs |
| Wide operating current range | Functional from 60μA to 15mA cathode current, enabling use in both nano-power sensors and higher-current analog front-ends |
| Low temperature hysteresis | 0.7mV max after thermal cycling (–40°C ↔ 125°C), ensuring repeatable calibration after environmental stress |
| ESD robustness | ±2000V HBM rating supports safe handling in standard manufacturing environments without special ESD controls |
| Extended temp option available | Same pinout offered in Q-grade (–40°C to 125°C); enables drop-in upgrade for automotive or under-hood applications |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) in portable test equipment requiring stable 2.5V reference for full-scale input range. IC Role / Device Role / Timing Role: Shunt voltage reference providing excitation and scaling voltage for ADC conversion accuracy. Use Value: ±0.5% tolerance and 50ppm/°C drift ensure <0.5 LSB error across industrial temperature range without calibration. |
Use Scenario: Real-time monitoring of 3.3V/5V rail integrity in industrial PLC I/O modules with fault reporting. IC Role / Device Role / Timing Role: Precision threshold reference for comparator-based overvoltage/undervoltage detection circuits. Use Value: Low 41μVRMS noise prevents false triggering; 60μA min current enables low-quiescent monitoring during standby. |
| Process Control Sensors | Battery-Powered Equipment |
Use Scenario: 4–20mA transmitter loop powered by 24V supply, using ratiometric measurement with 2.5V reference. IC Role / Device Role / Timing Role: Stable excitation source for bridge sensors (e.g., strain gauges) and ADC reference in loop-powered transmitters. Use Value: Long-term stability (120ppm/1000h) maintains calibration integrity over multi-year deployments in remote field sites. |
Use Scenario: Wearable health monitor with coin-cell battery, requiring sub-100μA system quiescent current and accurate biopotential measurement. IC Role / Device Role / Timing Role: Low-power voltage reference for analog front-end amplifiers and ADCs in energy-harvesting or battery-backed systems. Use Value: 60μA minimum cathode current allows direct bias from LDO output, eliminating dedicated reference bias circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B25IDBZR | ±0.2% initial tolerance (vs. ±0.5% for TL4050C25IDBZR); same 50ppm/°C tempco and SOT-23-3 package | Higher accuracy required in calibrated test gear or medical sensors where 0.3% absolute error budget is exceeded by C-grade | Select TL4050B25IDBZR when system-level calibration is impractical and tighter initial accuracy is mandatory |
| REF3025AIDBZR | Series reference (not shunt); 2.5V output, ±0.2% tolerance, 50ppm/°C, 50μA IQ, but requires output capacitor and has different pinout | Used where low-dropout series topology is preferred (e.g., single-supply systems with limited headroom above reference voltage) | Choose REF3025AIDBZR only if shunt topology conflicts with system architecture - not a pin-compatible substitute |
Compared with TL4050B25IDBZR, the TL4050C25IDBZR trades 0.3% initial accuracy for lower cost and identical thermal performance; versus REF3025AIDBZR, it offers simpler biasing and inherent capacitive-load immunity but requires external current-setting resistor and shares ground with load.
Availability
TL4050C25IDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with guaranteed long-term sourcing.
Supply support for TL4050C25IDBZR 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 ICs and broad portfolio of reference designs.
The TL4050 series was designed specifically for cost-sensitive, space-constrained applications needing micropower shunt references - targeting portable instrumentation, industrial sensors, and energy-efficient data converters.
FAQ
What is the minimum cathode current required for stable operation of TL4050C25IDBZR?
The TL4050C25IDBZR requires a minimum cathode current of 60μA (typical) and 65μA (max over temperature) to maintain regulation within specifications. Below this threshold, output voltage deviates beyond ±0.5% tolerance. Designers must size the series bias resistor to guarantee this minimum current under worst-case supply and load conditions, especially at low temperatures where leakage drops.
Can TL4050C25IDBZR be used without an output capacitor?
Yes, TL4050C25IDBZR is explicitly designed to operate stably without any output capacitor - a key differentiator from many shunt references. TI confirms stability across all capacitive loads up to 10µF. This eliminates capacitor-related BOM cost, board area, and aging effects, making TL4050C25IDBZR ideal for ultra-compact or high-reliability applications where passive components are minimized.
What is the thermal hysteresis specification for TL4050C25IDBZR?
The thermal hysteresis of TL4050C25IDBZR is 0.7mV maximum, 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 voltage output after thermal stress, critical for field-deployed equipment that undergoes repeated ambient temperature swings without recalibration.
How does the noise performance of TL4050C25IDBZR affect 16-bit ADC accuracy?
With 41μVRMS wideband noise (10Hz–10kHz), TL4050C25IDBZR contributes approximately 0.016% of full-scale error to a 2.5V-referenced 16-bit ADC (LSB = 38.1μV). This remains below 1 LSB, preserving effective resolution - provided PCB layout minimizes pickup and the reference is decoupled locally with a 100nF ceramic capacitor, as recommended in TI application notes.
Is TL4050C25IDBZR pin-compatible with other grades in the TL4050 family?
Yes, TL4050C25IDBZR is fully pin-compatible with all TL4050x25I variants in SOT-23-3 (DBZ) package, including TL4050A25IDBZR and TL4050B25IDBZR. Same pinout, footprint, and biasing requirements allow direct substitution during prototyping or cost optimization - though accuracy grade change requires verification of system-level error budget compliance.
TL4050C25IDBZR 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:
- ±0.5%
- 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
TL4050C25IDBZR FAQ
1.How can I place an order for TL4050C25IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050C25IDBZR 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 TL4050C25IDBZR reliable?
The price and inventory of TL4050C25IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050C25IDBZR is usually 5 days.
3.What payment methods are accepted for TL4050C25IDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050C25IDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4050C25IDBZR?
TL4050C25IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050C25IDBZR 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 TL4050C25IDBZR?
For technical support, including TL4050C25IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050C25IDBZR requirements.
6.How does Aetrix verify that TL4050C25IDBZR is sourced from the original manufacturer or authorized distributors?
All TL4050C25IDBZR 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 TL4050C25IDBZR meets industry standards.
7.What is the process for return or replacement of TL4050C25IDBZR?
All TL4050C25IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050C25IDBZR, 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 TL4050C25IDBZR part is unused and in its original packaging.
Return procedure for TL4050C25IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050C25IDBZR Tags
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