My Inquiry
My Account
Texas Instruments TL4050A25QDBZT
- Part No.:
- TL4050A25QDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050A25QDBZT.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,896
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL4050A25QDBZT from Texas Instruments is a precision micropower 2.5V shunt voltage reference in SOT-23-3 package, rated for –40°C to 125°C operation, with ±0.1% initial tolerance, 50ppm/°C max temperature coefficient, 41μVRMS noise, and stable operation down to 60μA cathode current. It serves as a stable reference in high-accuracy data acquisition and automotive power monitoring circuits.
For engineers reviewing the TL4050A25QDBZT datasheet, TL4050A25QDBZT pinout, TL4050A25QDBZT application, or TL4050A25QDBZT equivalent, key selection criteria include extended-temperature-grade shunt reference performance, low-noise stability under capacitive loads, minimal operating current, and compatibility with ADC/DAC biasing in battery-constrained systems.
Technical Context
The TL4050A25QDBZT operates as a two-terminal shunt reference requiring no external output capacitor and remains stable across all capacitive load conditions. Its internal bandgap circuit delivers fixed 2.5V reverse breakdown voltage with dynamic impedance of 0.3Ω at 1mA and thermal hysteresis of 0.7mV over –40°C to 125°C cycling.
It functions within a cathode current range of 60μA (typ) to 15mA, supports wide supply headroom via external series resistor biasing, and maintains long-term stability of 120ppm after 1000 hours at 25°C - enabling reliable use in safety-critical automotive and industrial control applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal reverse breakdown voltage at 100μA cathode current - sets precise reference level for 12-bit+ ADCs and DACs. |
| Initial Tolerance | ±0.1% max at 25°C - enables direct use in 12-bit systems without trimming (e.g., 1mV LSB with 4.096V variant). |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C - ensures ≤±0.125% output drift across full automotive temperature range. |
| Noise (10Hz–10kHz) | 41μVRMS typical - minimizes quantization error in precision measurement front-ends. |
| Min Cathode Current | 60μA typical - supports ultra-low-power operation in battery-powered sensors and portable instrumentation. |
| Dynamic Impedance | 0.3Ω at 1mA, 120Hz - provides low AC impedance for fast transient rejection in feedback-regulated supplies. |
| Operating Temp Range | –40°C to 125°C - qualified for under-hood automotive, industrial motor drives, and energy metering applications. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.4mm × 2.9mm footprint and 1.1mm height - optimized for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground terminal | Connected to system ground; forms return path for cathode current and defines reference potential. |
| Cathode (Pin 2) | Output/reference voltage node | Delivers regulated 2.5V; requires external series resistor to set total current (IZ + IL); must not be shorted to ground. |
| No-Connect (Pin 3) | Unused terminal | Internally floating; TI recommends leaving unconnected or tying to Pin 2 due to parasitic Schottky diode between Pins 2–3. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates stably with any capacitive load - eliminates BOM cost and layout area for output bypass caps. |
| Micropower operation | 60μA typical minimum cathode current - extends battery life in wireless sensors and portable test gear. |
| Extended temperature qualification | Specified from –40°C to 125°C - meets AEC-Q100 Grade 1 requirements for automotive under-hood use. |
| Low thermal hysteresis | 0.7mV max over –40°C ↔ 125°C cycling - prevents reference drift during thermal transients in engine control units. |
| High ESD robustness | ±2000V HBM rating - withstands handling and assembly stresses without degradation in production environments. |
Applications
| Data Acquisition Systems | Automotive Power Monitoring |
|---|---|
Use Scenario: High-resolution analog-to-digital conversion in portable multimeters and sensor signal conditioners. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for 16-bit SAR ADCs, ensuring <1-LSB error across temperature. Use Value: Enables direct interface to 2.5V-input ADCs without level-shifting; 41μVRMS noise avoids added quantization uncertainty. | Use Scenario: Real-time battery voltage and rail monitoring in ADAS ECUs and body control modules. IC Role / Device Role / Timing Role: Shunt reference for microcontroller ADC inputs measuring 12V battery and 5V domain rails. Use Value: ±0.1% tolerance and 125°C rating ensure accuracy during engine start-stop cycles and under-hood thermal stress. |
| Industrial Process Controls | Precision Audio Equipment |
Use Scenario: Analog I/O conditioning in PLC analog input modules for 4–20mA loop receivers. IC Role / Device Role / Timing Role: Reference for isolated sigma-delta ADCs converting field sensor outputs to digital control signals. Use Value: Low 0.3Ω dynamic impedance rejects supply ripple and improves common-mode rejection in noisy factory environments. | Use Scenario: Biasing and reference generation in studio-grade microphone preamplifiers and DAC output stages. IC Role / Device Role / Timing Role: Low-noise 2.5V reference for op-amp offset nulling and DAC reference buffers. Use Value: 41μVRMS broadband noise prevents audible hiss; thermal hysteresis <0.7mV avoids DC offset drift during warm-up. |
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 | 3.0V supply requirement; 50ppm/°C tempco; 25μVRMS noise; SOT-23-3 package | Requires clean 3.0V bias rail; lower noise but narrower operating current range (50μA–25mA) | Prefer when ultra-low noise is critical and 3V supply is available; not drop-in for 2.5V-only designs. |
| LM4040A25IDBZR | Same 2.5V output; ±0.1% tolerance; 100ppm/°C max tempco; 35μVRMS noise; SOT-23-3 | Higher tempco reduces accuracy at extremes; lower min current (45μA) but higher dynamic impedance (1.2Ω) | Acceptable where cost is prioritized over thermal stability; verify drift budget in 125°C environments. |
Compared with REF3025AIDBZR and LM4040A25IDBZR, TL4050A25QDBZT offers superior temperature stability (50ppm/°C vs. 100ppm/°C) and guaranteed 125°C operation - making it the preferred choice for automotive and industrial applications demanding consistent accuracy across wide thermal excursions.
Availability
TL4050A25QDBZT is available at Aetrix Electronics and suitable for automotive electronics, industrial process controls, and precision data-acquisition systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for TL4050A25QDBZT 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 belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power shunt regulation in harsh-temperature environments - targeting automotive sensing, industrial automation, and portable instrumentation.
FAQ
What is the maximum cathode current rating for TL4050A25QDBZT?
The absolute maximum cathode current for TL4050A25QDBZT is 20mA, though the recommended operating range is 60μA to 15mA per datasheet Section 5.1 and 5.3. Exceeding 15mA risks exceeding thermal limits in SOT-23-3 packaging, especially above 85°C ambient. Derating is required above 25°C to maintain junction temperature below 150°C.
Does TL4050A25QDBZT require an output capacitor for stability?
No, TL4050A25QDBZT does not require an output capacitor for stability. As confirmed in Section 8.1 of the datasheet, it is designed to remain stable with all capacitive loads - including zero capacitance - eliminating the need for external bypass components and simplifying layout in space-constrained designs.
How does the pin configuration of TL4050A25QDBZT differ from standard SOT-23-3 references?
TL4050A25QDBZT uses standard SOT-23-3 pinout (Anode–Cathode–NC), but Section 8.2 notes a parasitic Schottky diode between Pins 2 (Cathode) and 3 (NC). Therefore, Pin 3 must be left floating or tied to Pin 2 - unlike generic SOT-23-3 devices where Pin 3 may be grounded or used as enable.
Can TL4050A25QDBZT be used with a 12-bit ADC requiring a 4.096V reference?
TL4050A25QDBZT provides 2.5V output and is not suitable as a 4.096V reference. For that function, TI specifies TL4050A41QDBZT (4.096V, same grade/package/temperature rating). Using TL4050A25QDBZT would require external gain or level-shifting, compromising accuracy and adding noise - so direct substitution is not recommended.
What is the long-term stability specification for TL4050A25QDBZT?
TL4050A25QDBZT exhibits 120ppm long-term stability after 1000 hours of operation at 25°C ±0.1°C with 100μA cathode current, as specified in Sections 5.4 and 5.5. This value reflects parametric drift under controlled conditions and supports reliability forecasting in mission-critical applications such as automotive control units and energy meters.
TL4050A25QDBZT 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050A25QDBZT FAQ
1.How can I place an order for TL4050A25QDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A25QDBZT 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 TL4050A25QDBZT reliable?
The price and inventory of TL4050A25QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A25QDBZT is usually 5 days.
3.What payment methods are accepted for TL4050A25QDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050A25QDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4050A25QDBZT?
TL4050A25QDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050A25QDBZT 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 TL4050A25QDBZT?
For technical support, including TL4050A25QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A25QDBZT requirements.
6.How does Aetrix verify that TL4050A25QDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050A25QDBZT 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 TL4050A25QDBZT meets industry standards.
7.What is the process for return or replacement of TL4050A25QDBZT?
All TL4050A25QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A25QDBZT, 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 TL4050A25QDBZT part is unused and in its original packaging.
Return procedure for TL4050A25QDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A25QDBZT Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
