My Inquiry
My Account
Texas Instruments TL4050A25QDBZR
- Part No.:
- TL4050A25QDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050A25QDBZR.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,828
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL4050A25QDBZR from Texas Instruments is a precision 2.5V micropower shunt voltage reference in SOT-23-3 package, rated for –40°C to 125°C operation, with ±0.1% initial tolerance, ±50ppm/°C temperature coefficient, 41μVRMS noise, and stable operation down to 60μA cathode current. It serves as a high-stability reference in battery-powered instrumentation and automotive sensor signal chains.
For engineers reviewing the TL4050A25QDBZR datasheet, TL4050A25QDBZR pinout, TL4050A25QDBZR application, or TL4050A25QDBZR equivalent, key selection criteria include extended-temperature shunt reference performance, low-noise DC biasing for ADCs/DACs, minimal operating current, and compatibility with capacitive loads without external compensation.
Technical Context
The TL4050A25QDBZR operates as a two-terminal shunt reference requiring only an external series resistor to regulate cathode current between 60μA and 15mA. Its internal bandgap-derived Zener structure delivers fixed 2.5V reverse breakdown voltage with low dynamic impedance (0.3Ω at 1mA) and thermal hysteresis of 0.7mV over –40°C to 125°C cycling.
Designed for direct integration into precision analog front-ends, it maintains output stability across wide current and temperature ranges without output capacitance-enabling compact, low-power designs in space-constrained industrial and automotive modules where supply headroom is limited and EMI resilience is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal; enables LSB-accurate scaling in 12-bit ADCs using 5V supplies (e.g., 1mV per LSB with 4.096V variant, but 2.5V sets precise mid-rail or sensor excitation points) |
| Initial Tolerance | ±0.1% max at 25°C; ensures ≤±2.5mV absolute error before calibration, critical for factory-trimmed systems |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C; contributes ≤±1.25mV drift across full range, supporting AEC-Q100-compliant automotive modules |
| Output Noise | 41μVRMS (10Hz–10kHz); preserves SNR in 16-bit+ data acquisition without added filtering overhead |
| Min Cathode Current | 60μA typical; allows operation from microamp-level bias sources, ideal for energy-harvesting or ultra-low-power wake-up circuits |
| Dynamic Impedance | 0.3Ω at 1mA; minimizes load-induced voltage shift during transient current demands in multiplexed sensor arrays |
| Long-Term Stability | 120ppm after 1000h; supports >10-year calibration intervals in sealed industrial monitoring equipment |
Pinout & Package
SOT-23-3 package (DBZ), 2.92mm × 1.3mm footprint, 1.45mm height, surface-mount, RoHS-compliant. Thermal resistance θJA = 206°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground terminal | Connected to system GND; forms return path for cathode current and defines 0V reference point for output |
| Cathode (Pin 2) | Output voltage node | Delivers regulated 2.5V; requires external series resistor (RS) to set total current (IZ + IL) from supply rail |
| No-Connect (Pin 3) | Unused terminal | Internally floating; must remain unconnected or tied to Pin 2 per TI recommendation to avoid parasitic Schottky conduction |
Key Features
| Feature | Design Value |
|---|---|
| Extended temperature grade | Qualified for –40°C to 125°C ambient; enables use in engine control units, under-hood sensors, and industrial PLCs without derating |
| No output capacitor required | Stable with all capacitive loads up to 10µF; eliminates BOM cost and board area for bypass caps in portable medical devices |
| Low quiescent current | 60μA typical minimum cathode current; extends battery life in wireless sensor nodes beyond 10 years on coin cells |
| Low noise & high PSRR | 41μVRMS noise + inherent high power-supply rejection; reduces need for LDO pre-regulation in noisy automotive 12V systems |
| Three accuracy grades | A/B/C grades (0.1%/0.2%/0.5%) in same footprint; allows cost-optimized binning without PCB redesign across product tiers |
Applications
| Data Acquisition Systems | Automotive Electronics |
|---|---|
Use Scenario: High-resolution ADC reference in portable multimeters and handheld analyzers. IC Role / Device Role / Timing Role: Provides stable 2.5V reference for SAR ADC conversion, directly determining measurement accuracy and repeatability. Use Value: ±0.1% tolerance and 41μVRMS noise enable true 16-bit effective resolution without post-calibration in field-deployed instruments. | Use Scenario: Reference for oxygen sensor signal conditioning in exhaust gas recirculation (EGR) modules. IC Role / Device Role / Timing Role: Supplies precision bias voltage to op-amp circuitry amplifying Nernst cell outputs under extreme thermal cycling. Use Value: ±50ppm/°C tempco and 125°C rating ensure <±2mV drift across engine cold-start to full-load conditions, meeting OEM diagnostic thresholds. |
| Power-Supply Monitors | Battery-Powered Equipment |
Use Scenario: Input voltage reference for overvoltage/undervoltage detection in telecom DC-DC supervisors. IC Role / Device Role / Timing Role: Sets accurate trip thresholds for comparator-based fault detection in redundant 48V power systems. Use Value: Low dynamic impedance (0.3Ω) prevents threshold shift during fast transients, ensuring reliable fault flag assertion within 100ns. | Use Scenario: Reference for fuel gauge ICs in lithium-ion battery packs for medical wearables. IC Role / Device Role / Timing Role: Enables precise cell voltage measurement during low-current sleep modes (<100μA system draw). Use Value: 60μA min cathode current allows continuous monitoring while consuming <0.15mW, extending standby time by >30% vs. higher-IQ references. |
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 output, 50ppm/°C, 25μVRMS noise, 50μA min current, same SOT-23-3 package | Higher output voltage limits use in 2.5V-rail systems; lower noise suits metrology-grade instruments | Select when 3.0V reference is acceptable and sub-30μVRMS noise is mandatory for >18-bit systems |
| ADR3425ARJZ-R7 | 2.5V output, 10ppm/°C max, 12μVRMS noise, 100μA min current, SOT-23-5 package | Lower tempco and noise but higher minimum current; 5-pin layout requires PCB change | Choose for ultra-high-precision lab equipment where 10ppm/°C stability outweighs layout revision cost |
Compared with REF3025AIDBZR and ADR3425ARJZ-R7, TL4050A25QDBZR offers the optimal balance of extended-temperature reliability, ultra-low operating current, and drop-in SOT-23-3 compatibility-making it preferred for cost-sensitive, high-volume automotive and industrial modules where 2.5V reference voltage and robustness are primary requirements.
Availability
TL4050A25QDBZR is available at Aetrix Electronics and suitable for automotive sensor modules, industrial process controllers, and battery-powered test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TL4050A25QDBZR 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 and embedded processing solutions, with over 90 years of innovation in precision analog ICs and automotive-grade components.
The TL4050 series targets high-reliability shunt reference applications in harsh environments-designed specifically for automotive, industrial, and medical systems demanding extended-temperature operation, low power, and long-term stability without external compensation.
FAQ
What is the maximum cathode current rating for TL4050A25QDBZR?
The absolute maximum cathode current for TL4050A25QDBZR 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 (typical minimum) and 10mA (recommended upper limit), ensuring power dissipation stays within thermal limits of the SOT-23-3 package.
Does TL4050A25QDBZR require an output capacitor for stability?
No, TL4050A25QDBZR does not require an output capacitor for stability. Its internal architecture is inherently stable with all capacitive loads-including 0μF-and TI explicitly states no external capacitor is needed. Adding one (e.g., 100nF) may reduce high-frequency noise but introduces no stability benefit and is optional per application requirements.
How does the temperature coefficient of TL4050A25QDBZR affect accuracy over its full operating range?
TL4050A25QDBZR has a maximum average temperature coefficient of ±50ppm/°C over –40°C to 125°C. Across this 165°C span, worst-case drift is ±8.25mV (50ppm × 165 × 2.5V), contributing to total error alongside initial tolerance (±2.5mV) and long-term drift (±0.31mV). This combined error remains within ±11mV, supporting 12-bit accuracy in closed-loop systems with periodic calibration.
Can TL4050A25QDBZR be used as a replacement for TL4050A25IDBZR in new designs?
Yes, TL4050A25QDBZR can replace TL4050A25IDBZR in new designs where extended temperature operation (–40°C to 125°C vs. –40°C to 85°C) is required. Both share identical electrical specs, SOT-23-3 package, pinout, and marking compatibility. The Q-grade version adds qualification for higher ambient temperatures-ideal for under-hood or industrial edge computing applications-without any layout or schematic changes.
What is the purpose of Pin 3 (NC) on TL4050A25QDBZR, and how should it be handled?
Pin 3 on TL4050A25QDBZR is a no-connect terminal with no internal connection. However, the SOT-23-3 package contains a parasitic Schottky diode between Pins 2 and 3. TI recommends leaving Pin 3 floating or connecting it directly to Pin 2 (Cathode) to prevent unintended conduction paths in high-EMI environments-such as near switching regulators or motor drivers-ensuring predictable reference behavior and avoiding output perturbation.
TL4050A25QDBZR 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
TL4050A25QDBZR FAQ
1.How can I place an order for TL4050A25QDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A25QDBZR 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 TL4050A25QDBZR reliable?
The price and inventory of TL4050A25QDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A25QDBZR is usually 5 days.
3.What payment methods are accepted for TL4050A25QDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050A25QDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4050A25QDBZR?
TL4050A25QDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050A25QDBZR 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 TL4050A25QDBZR?
For technical support, including TL4050A25QDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A25QDBZR requirements.
6.How does Aetrix verify that TL4050A25QDBZR is sourced from the original manufacturer or authorized distributors?
All TL4050A25QDBZR 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 TL4050A25QDBZR meets industry standards.
7.What is the process for return or replacement of TL4050A25QDBZR?
All TL4050A25QDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A25QDBZR, 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 TL4050A25QDBZR part is unused and in its original packaging.
Return procedure for TL4050A25QDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A25QDBZR 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…
