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Texas Instruments TL4050C25IDBZT
- Part No.:
- TL4050C25IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050C25IDBZT.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:707
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Product details
Overview
TL4050C25IDBZT from Texas Instruments is a precision 2.5V micropower shunt voltage reference in SOT-23-3 package, rated for –40°C to 85°C operation, 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-drift, low-noise reference in high-resolution ADCs, portable power monitors, and battery-powered instrumentation.
For engineers reviewing the TL4050C25IDBZT datasheet, TL4050C25IDBZT pinout, TL4050C25IDBZT application, or TL4050C25IDBZT equivalent, key selection criteria include its 2.5V fixed output, C-grade accuracy, SOT-23-3 footprint compatibility, and ability to operate without output capacitance across capacitive loads.
Technical Context
The TL4050C25IDBZT functions as a two-terminal shunt reference, requiring only an external series resistor to regulate voltage by sinking variable cathode current while maintaining a stable 2.5V reverse breakdown voltage. Its internal bandgap core delivers low dynamic impedance (0.3Ω at 1mA) and thermal hysteresis of just 0.7mV over –40°C to 125°C cycling.
Designed for direct integration into data-acquisition signal chains, it supports cathode currents from 60μA to 15mA, exhibits no minimum load requirement, and remains stable with any capacitive load - eliminating need for output bypass capacitors in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal; tightly regulated reverse breakdown voltage used as precision reference point in feedback or measurement paths. |
| Initial Tolerance | ±0.5% max at 25°C; defines maximum deviation before temperature or aging effects, critical for 10-bit system accuracy. |
| Temp Coefficient | 50ppm/°C max over –40°C to 85°C; ensures ≤1.25mV drift across full industrial range, enabling stable calibration. |
| Noise (10Hz–10kHz) | 41μVRMS typical; low enough to avoid degrading ENOB in 16-bit SAR ADCs when used as reference source. |
| Cathode Current Range | 60μA to 15mA; supports ultra-low-power sensor nodes and higher-current analog front-ends without external biasing. |
| Dynamic Impedance | 0.3Ω at 1mA; minimizes output voltage shift under varying load current, improving regulation in dynamic systems. |
| Long-Term Stability | 120ppm after 1000 hours; quantifies reference drift over time, supporting reliability planning in sealed industrial modules. |
Pinout & Package
SOT-23-3 package: 2.92mm × 1.3mm × 1.02mm body, surface-mount, moisture-sensitive level 1, JEDEC standard footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connected to system ground; forms return path for cathode current and defines 0V reference plane for output. |
| Cathode (Pin 2) | Output voltage terminal | Delivers stable 2.5V; sinks all current through external series resistor; must be decoupled locally if driving noisy loads. |
| NC / Floating (Pin 3) | No-connect (SOT-23) | Internally unconnected; must remain floating or tied to Pin 2 per TI recommendation to avoid parasitic Schottky conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates BOM cost and board area for reference bypass caps while maintaining phase margin across all load capacitances. |
| Micropower operation | 60μA minimum cathode current enables use in coin-cell-powered devices with >10-year battery life at 1-sample/sec wake-up rate. |
| Wide temperature range | Specified from –40°C to +85°C ambient, supporting deployment in automotive cabin electronics and outdoor industrial sensors. |
| Low thermal hysteresis | 0.7mV max hysteresis after –40°C/125°C cycling ensures repeatable calibration after thermal stress in field-replaceable modules. |
| Robust ESD rating | ±2000V HBM protects against handling damage during manual assembly and rework in contract manufacturing environments. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 16-bit SAR ADC measuring thermocouple or strain-gauge signals in programmable logic controllers. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for ADC VREF input, directly determining LSB size and absolute measurement accuracy. Use Value: 41μVRMS noise and 50ppm/°C drift preserve ≥15.2 ENOB across industrial temperature range without recalibration. |
Use Scenario: Real-time monitoring of 3.3V/5V rail voltages in telecom power shelves with fault logging. IC Role / Device Role / Timing Role: Serves as precision threshold reference for comparator-based overvoltage/undervoltage detection circuits. Use Value: ±0.5% tolerance ensures trip-point accuracy within ±12.5mV at 2.5V, meeting IEC 61000-4-30 Class A compliance margins. |
| Portable Instrumentation | Battery-Powered Sensors |
Use Scenario: Handheld multimeter with autoranging analog front-end and auto-zero function. IC Role / Device Role / Timing Role: Supplies reference for integrator and auto-zero amplifier stages in dual-slope ADC architecture. Use Value: Low 60μA operating current extends alkaline battery life to >500 hours in continuous-use mode. |
Use Scenario: Wireless environmental node measuring temperature/humidity with 10-year target field lifetime. IC Role / Device Role / Timing Role: References ADC and analog sensor conditioning circuitry during brief active measurement bursts. Use Value: No required output capacitor reduces component count and PCB area in 8mm × 8mm sensor module design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040C25IDBZR | Same 2.5V output and C-grade (±0.5%) tolerance, but higher 100ppm/°C tempco and 75μVRMS noise. | Limited to lower-precision 12-bit systems; unsuitable where <15 ENOB or <2mV total drift is required. | Lower-cost option when full TL4050 performance is not needed and board layout allows minor derating. |
| REF3025AIDBZR | Series reference (not shunt); requires minimum load current; 25ppm/°C tempco but 50μVRMS noise and 3.6V min supply. | Requires redesign of bias network and supply rail; incompatible with shunt topology or single-supply <3.6V systems. | Only viable if switching to series topology is acceptable and tighter tempco justifies added complexity and cost. |
Compared with LM4040C25IDBZR, TL4050C25IDBZT delivers 2× lower temperature drift and 45% less noise for high-fidelity measurements; versus REF3025AIDBZR, it retains shunt simplicity and ultra-low current operation but trades off tempco performance.
Availability
TL4050C25IDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and portable instrumentation requiring stable component supply with guaranteed long-term sourcing and consistent parametric performance.
Supply support for TL4050C25IDBZT 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 broad industrial portfolio coverage.
The TL4050 series was designed specifically for cost-sensitive, space-constrained applications needing stable shunt references - targeting portable instrumentation, battery-powered sensors, and industrial data loggers where micropower and capacitor-free operation are essential.
FAQ
What is the operating temperature range for TL4050C25IDBZT?
The TL4050C25IDBZT is specified for industrial temperature operation from –40°C to +85°C ambient. This range is validated per TI's characterization data in Section 5.4 of the datasheet, and applies to all electrical parameters including initial tolerance, temperature coefficient, and dynamic impedance. The device remains functional beyond this range but without guaranteed specifications.
Does TL4050C25IDBZT require an output capacitor?
No, TL4050C25IDBZT does not require an output capacitor for stability. As confirmed in Section 8.1 and Figure 8-1 of the datasheet, it is explicitly designed to remain stable with all capacitive loads - including zero capacitance - due to its inherent low dynamic impedance and internal compensation. Adding one provides no stability benefit but may reduce high-frequency noise.
What is the minimum cathode current needed for TL4050C25IDBZT to regulate properly?
The TL4050C25IDBZT requires a minimum cathode current of 60μA (typical) at 25°C, with 65μA maximum across the full –40°C to +85°C range. This value is specified in Table 5.4 under "IZ,min" for TL4050C25I. Operating below this current risks loss of regulation and increased output voltage error.
How does the pin configuration of TL4050C25IDBZT differ from standard SOT-23 op-amps?
TL4050C25IDBZT uses Pins 1 (Anode), 2 (Cathode), and 3 (NC) in SOT-23-3 - unlike op-amps, Pin 3 is unconnected and must remain floating or tied to Pin 2 per Section 8.2 of the datasheet to prevent conduction through an internal parasitic Schottky diode. Misconnecting Pin 3 can cause regulation failure or excessive quiescent current.
Can TL4050C25IDBZT replace TL4050A25IDBZT in an existing design?
Yes, TL4050C25IDBZT is pin-compatible and functionally identical to TL4050A25IDBZT except for relaxed initial tolerance (±0.5% vs ±0.1%) and same 50ppm/°C tempco. It can be substituted directly if the system design accommodates the wider initial error band - verified in Section 5.4 where both share identical VZ, IZ,min, ZZ, and noise specs.
TL4050C25IDBZT 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
TL4050C25IDBZT FAQ
1.How can I place an order for TL4050C25IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050C25IDBZT 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 TL4050C25IDBZT reliable?
The price and inventory of TL4050C25IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050C25IDBZT is usually 5 days.
3.What payment methods are accepted for TL4050C25IDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050C25IDBZT transactions.
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TL4050C25IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050C25IDBZT 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 TL4050C25IDBZT?
For technical support, including TL4050C25IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050C25IDBZT requirements.
6.How does Aetrix verify that TL4050C25IDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050C25IDBZT 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 TL4050C25IDBZT meets industry standards.
7.What is the process for return or replacement of TL4050C25IDBZT?
All TL4050C25IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050C25IDBZT, 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 TL4050C25IDBZT part is unused and in its original packaging.
Return procedure for TL4050C25IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050C25IDBZT Tags
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TL431AIDBZR
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TL431BQDBZR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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