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Texas Instruments TL4050A25IDBZT
- Part No.:
- TL4050A25IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050A25IDBZT.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,007
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Product details
Overview
TL4050A25IDBZT from Texas Instruments is a precision micropower 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 low-power instrumentation.
For engineers reviewing the TL4050A25IDBZT datasheet, TL4050A25IDBZT pinout, TL4050A25IDBZT application, or TL4050A25IDBZT equivalent, this page delivers verified electrical characteristics, thermal hysteresis (0.7mV), dynamic impedance (0.3Ω), long-term stability (120ppm), and design guidance for shunt regulator configuration with variable load and supply conditions.
Technical Context
The TL4050A25IDBZT operates as a two-terminal shunt reference requiring no external capacitor for stability and supporting all capacitive loads. Its core function relies on reverse-biased Zener-like breakdown at precisely 2.5V with tight initial accuracy and low drift over temperature.
It maintains regulation across a 60μA–15mA cathode current range while delivering low dynamic impedance (0.3Ω at 1mA) and minimal voltage variation (<0.8mV) under changing load currents - critical for precision analog signal chains where reference error directly impacts measurement fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5V nominal; enables LSB = 1mV in 12-bit systems with 5V full-scale (e.g., ADS7842) |
| Initial Tolerance | ±0.1% max at 25°C; ensures ≤±2.5mV absolute error before calibration |
| Temp Coefficient | ±50ppm/°C max over –40°C to 85°C; contributes ≤±4.25mV drift across full range |
| Noise (10Hz–10kHz) | 41μVRMS typical; minimizes added uncertainty in high-resolution data acquisition |
| Dynamic Impedance | 0.3Ω at 1mA; suppresses output voltage shift under fast load transients |
| Min Cathode Current | 60μA typical; supports ultra-low-power battery-operated designs |
| Thermal Hysteresis | 0.7mV; limits repeatability error after thermal cycling between –40°C and 125°C |
Pinout & Package
SOT-23-3 package (DBZ) with standard pinout: Pin 1 = Cathode, Pin 2 = Anode, Pin 3 = NC (no internal connection; must be left floating or tied to Pin 2 per TI recommendation due to parasitic Schottky diode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Cathode) | Reference output node | Connected to load and bias resistor; sinks total current (IZ + IL); voltage referenced to anode |
| Pin 2 (Anode) | Reference ground reference | Common return path; defines 0V reference point for VZ; must be low-impedance |
| Pin 3 (NC) | No internal connection | Must remain unconnected or tied to Pin 2; not usable as signal or bypass terminal |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output capacitor - simplifies layout and reduces BOM count in space-constrained designs |
| Low 41μVRMS noise | Preserves SNR in 16-bit+ ADC applications without requiring external filtering |
| 60μA typical IZ,min | Enables operation from coin-cell batteries or energy-harvesting sources with microamp-level supply budgets |
| 0.3Ω dynamic impedance | Minimizes output voltage sag during digital switching events in mixed-signal SoCs |
| –40°C to 85°C industrial grade | Validated performance across commercial and extended industrial ambient conditions without derating |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 12–16-bit SAR ADC front-end in portable test equipment. IC Role / Device Role / Timing Role: Provides precise 2.5V reference for ADC full-scale range; replaces bulkier bandgap references. Use Value: Enables 1mV LSB resolution with <±0.1% gain error contribution, reducing system calibration burden. |
Use Scenario: Real-time monitoring of 3.3V/5V rail voltages in embedded controllers. IC Role / Device Role / Timing Role: Shunt reference in resistive divider feedback loop for comparator-based overvoltage detection. Use Value: Delivers stable threshold with <±0.5mV total error over temperature, improving fault detection reliability. |
| Precision Audio Converters | Battery-Powered Equipment |
Use Scenario: Reference for DAC in portable audio players requiring low THD+N. IC Role / Device Role / Timing Role: Sets analog output voltage scale for audio DAC; rejects supply ripple via high PSRR inherent to shunt topology. Use Value: 41μVRMS noise avoids audible hiss; 0.3Ω impedance prevents DAC output distortion during dynamic current draw. |
Use Scenario: Voltage reference in wireless sensor node with 10-year battery life target. IC Role / Device Role / Timing Role: Low-power shunt reference for ADC measuring battery voltage and sensor signals. Use Value: 60μA min cathode current allows operation from 100kΩ bias resistor off 3.6V Li-ion, extending runtime. |
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 | Series reference (3-pin), 2.5V, ±0.2% initial tol, 50ppm/°C, 42μVRMS noise, 50μA quiescent | Requires input voltage >2.5V + dropout; unsuitable for low-VIN shunt configurations | Prefer when input headroom exists and PCB layout permits 3-pin placement |
| LM4040A25IDBZR | Shunt reference, 2.5V, ±0.1% tol, 100ppm/°C, 35μVRMS noise, 60μA min IZ, same SOT-23-3 | Higher tempco increases drift by ~2×; lower noise marginally improves SNR | Acceptable where tighter tempco is non-critical and cost sensitivity favors LM4040 family |
Compared with REF3025AIDBZR and LM4040A25IDBZR, TL4050A25IDBZT uniquely combines ±0.1% tolerance, 50ppm/°C tempco, and shunt topology in SOT-23-3 - enabling direct replacement in existing 2.5V reference designs without layout change or voltage headroom adjustment.
Availability
TL4050A25IDBZT 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 continuity.
Supply support for TL4050A25IDBZT 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 belongs to TI's precision shunt voltage reference product line, engineered for high-accuracy, low-power, and capacitor-free operation in portable instrumentation, data converters, and automotive subsystems.
FAQ
What is the operating temperature range for TL4050A25IDBZT?
The TL4050A25IDBZT is characterized for industrial temperature operation from –40°C to +85°C. This range is validated per TI's datasheet Section 5.3 and applies to all electrical specifications including initial tolerance, temperature coefficient, and dynamic impedance - making it suitable for deployment in non-automotive industrial environments without derating.
Does TL4050A25IDBZT require an output capacitor?
No, TL4050A25IDBZT 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 PCB layout in space-constrained applications.
How is the cathode current calculated for TL4050A25IDBZT in a shunt regulator circuit?
In a shunt regulator, cathode current IZ for TL4050A25IDBZT is determined by the bias resistor RS and supply voltage: IZ = (VS – 2.5V)/RS – IL. Per Section 8.4, RS must ensure IZ stays within 60μA (min) and 15mA (max) across all load and supply variations - critical for maintaining regulation integrity.
What is the thermal hysteresis specification for TL4050A25IDBZT?
The thermal hysteresis of TL4050A25IDBZT is 0.7mV, defined as the difference in 25°C output voltage measured after cycling to –40°C versus after cycling to 125°C. This value is specified in Tables 5.4 and 5.5 and directly impacts repeatability in systems undergoing repeated thermal cycles.
Can TL4050A25IDBZT be used with a 12-bit ADC like the ADS7842?
Yes, TL4050A25IDBZT is explicitly recommended for use with 12-bit ADCs such as the ADS7842, as shown in Figure 8-2 of the datasheet. Its 2.5V output enables a 1mV LSB with 5V full-scale, and its low noise (41μVRMS) and tight tolerance (±0.1%) minimize conversion errors without additional calibration.
TL4050A25IDBZT 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
TL4050A25IDBZT FAQ
1.How can I place an order for TL4050A25IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A25IDBZT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of TL4050A25IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A25IDBZT is usually 5 days.
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For technical support, including TL4050A25IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A25IDBZT requirements.
6.How does Aetrix verify that TL4050A25IDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050A25IDBZT 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 TL4050A25IDBZT meets industry standards.
7.What is the process for return or replacement of TL4050A25IDBZT?
All TL4050A25IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A25IDBZT, 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 TL4050A25IDBZT part is unused and in its original packaging.
Return procedure for TL4050A25IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A25IDBZT Tags
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