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Texas Instruments TL4050B50IDBZT
- Part No.:
- TL4050B50IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050B50IDBZT.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,047
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Product details
Overview
TL4050B50IDBZT from Texas Instruments is a precision micropower shunt voltage reference with 5.0 V nominal output, ±0.2% initial tolerance (B grade), 50 ppm/°C max temperature coefficient, 93 μVRMS wideband noise (10 Hz–10 kHz), and stable operation from 56 μA to 15 mA cathode current. It serves as a high-accuracy voltage reference in 12-bit data-acquisition systems requiring low-drift, low-noise, and minimal supply current.
For engineers reviewing the TL4050B50IDBZT datasheet, TL4050B50IDBZT pinout, TL4050B50IDBZT application, or TL4050B50IDBZT equivalent, this device is selected for precision analog signal chains where thermal stability, long-term drift (<120 ppm over 1000 h), and compatibility with capacitive loads without external compensation are critical design requirements.
Technical Context
The TL4050B50IDBZT operates as a two-terminal shunt reference, sinking cathode current to maintain a precise 5.0 V reverse breakdown voltage across its terminals. Its internal bandgap-derived core delivers low dynamic impedance (0.5 Ω at 1 mA, 120 Hz) and low thermal hysteresis (1.4 mV over –40°C to 125°C cycling).
Designed for industrial temperature range (–40°C to +85°C), it requires no output capacitor and remains stable under all capacitive load conditions. Its minimum operating cathode current is 56 μA (typical), enabling use in ultra-low-power battery-operated instrumentation and sensor front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal at 100 μA cathode current; enables direct interface with 5 V ADCs/DACs and eliminates scaling resistors in 12-bit systems. |
| Initial Tolerance | ±0.2% max (B grade); ensures ≤10 mV absolute error at 25°C, supporting sub-LSB accuracy in 5 V full-scale 12-bit converters. |
| Tempco | ±50 ppm/°C max over –40°C to +85°C; contributes ≤4.25 mV drift across full industrial range, critical for uncalibrated field instruments. |
| Noise (10 Hz–10 kHz) | 93 μVRMS; limits added noise to <0.015 LSB in 5 V, 12-bit systems (LSB = 1.22 mV), preserving effective resolution. |
| Cathode Current Range | 56 μA (min typ) to 15 mA (max); supports operation from micro-power sensor nodes to higher-current analog monitoring circuits. |
| Dynamic Impedance | 0.5 Ω at 1 mA, 120 Hz; maintains output regulation against fast load transients and minimizes error from varying cathode current. |
| Long-Term Stability | 120 ppm over 1000 h at 25°C; ensures predictable aging behavior in deployed equipment with multi-year service life. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.0 mm × 1.4 mm footprint and 0.95 mm height - optimized for space-constrained PCB layouts in portable and modular instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground terminal | Connected to system ground; forms return path for cathode current and defines 0 V reference point for output voltage. |
| Cathode (Pin 2) | Output voltage terminal | Provides regulated 5.0 V output; sinks all current drawn by load and bias network; must be connected via series resistor to input supply. |
| NC / Floating (Pin 3) | Not internally connected | Must remain unconnected or tied to Pin 2 per TI recommendation to avoid parasitic Schottky diode conduction in SOT-23 package. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output bypass capacitor - reduces BOM count and layout sensitivity in noise-critical analog sections. |
| Low micropower operation | 56 μA typical minimum cathode current enables use in always-on battery-powered sensors with multi-year runtime. |
| Low thermal hysteresis | 1.4 mV max after –40°C ↔ 125°C thermal cycling - preserves calibration integrity in equipment exposed to ambient temperature swings. |
| Wide operating current range | Supports both low-current precision sensing (e.g., 100 μA) and higher-current analog monitoring (e.g., 10 mA) without re-biasing. |
| Industrial temperature rating | Specified from –40°C to +85°C - suitable for deployment in factory automation, outdoor metering, and automotive cabin electronics. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution 12-bit ADC sampling of industrial sensor outputs (e.g., pressure, temperature) in PLC analog input modules. IC Role / Device Role / Timing Role: Precision 5.0 V reference for ADC full-scale range, directly enabling 1 mV LSB resolution. Use Value: ±0.2% tolerance and 50 ppm/°C tempco ensure <0.5 LSB total error across temperature, eliminating system-level calibration. |
Use Scenario: Monitoring 5 V rail integrity in telecom power shelves with fault logging and brownout detection. IC Role / Device Role / Timing Role: Stable reference for comparator-based overvoltage/undervoltage detection circuitry. Use Value: Low 93 μVRMS noise prevents false triggering; wide cathode current range accommodates varying monitor load currents. |
| Process Control Transmitters | Battery-Powered Test Equipment |
Use Scenario: 4–20 mA loop-powered transmitter with onboard analog signal conditioning and microcontroller ADC. IC Role / Device Role / Timing Role: Primary voltage reference for sensor excitation and measurement conversion within strict 3.5 mA loop budget. Use Value: 56 μA min cathode current allows reference operation while leaving >3 mA for sensor drive and MCU, meeting loop power constraints. |
Use Scenario: Handheld multimeter or portable oscilloscope front-end requiring stable reference during battery discharge (3.0–4.2 V). IC Role / Device Role / Timing Role: Reference for autoranging ADC and precision DAC used in calibration and signal generation. Use Value: No output capacitor needed simplifies layout in compact enclosures; low drift ensures measurement repeatability across battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3050AIDBZR | Series reference (not shunt); 5.0 V, ±0.2%, 50 ppm/°C, 3.3 V min input, 50 μA quiescent current. | Requires dedicated supply rail ≥5.0 V; unsuitable for floating or high-side sensing topologies where shunt configuration is mandatory. | Select when input supply is well-regulated and board space permits series topology with lower dropout headroom. |
| LM4050B50IDBZR | Pin-compatible shunt reference; same 5.0 V, ±0.2%, 50 ppm/°C, but higher 120 μVRMS noise and 70 μA min cathode current. | Higher noise degrades ENOB in high-resolution ADCs; higher min current limits ultra-low-power use cases below 70 μA. | Select only if TL4050B50IDBZT is unavailable; verify noise impact on target ADC SNR and confirm sufficient bias current margin. |
Compared with REF3050AIDBZR and LM4050B50IDBZR, TL4050B50IDBZT uniquely combines true shunt topology, lowest noise (93 μVRMS), and lowest min cathode current (56 μA) in a DBZ package - making it optimal for floating references, low-power sensor nodes, and noise-sensitive 12-bit data acquisition.
Availability
TL4050B50IDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered test equipment requiring stable component supply with guaranteed long-term continuity.
Supply support for TL4050B50IDBZT 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 industrial-grade components.
The TL4050 series was designed specifically for cost-sensitive, high-accuracy shunt reference applications in data acquisition, process control, and portable instrumentation - prioritizing micropower operation, low noise, and robust thermal performance.
FAQ
What is the operating temperature range for TL4050B50IDBZT?
The TL4050B50IDBZT is specified for industrial temperature operation from –40°C to +85°C. This range is confirmed in Section 5.8 (TL4050x50I Electrical Characteristics) of the official TI datasheet SLOS486B, and applies to all B-grade 5.0 V variants in SOT-23-3 (DBZ) packaging. It is not rated for extended –40°C to +125°C operation - that specification applies only to Q-grade variants like TL4050B50QDBZT.
Does TL4050B50IDBZT require an output capacitor for stability?
No, TL4050B50IDBZT does not require an output capacitor for stability. As stated in Section 8.1 of the TI datasheet, the device is designed to be stable with all capacitive loads and operates reliably without any external bypass capacitor. Adding one is optional and only beneficial for additional high-frequency noise filtering - not for loop stability.
What is the minimum cathode current required for TL4050B50IDBZT to maintain regulation?
The minimum cathode current for TL4050B50IDBZT is 56 μA (typical) and 80 μA (maximum) across the full –40°C to +85°C range, per Section 5.8 of the TI datasheet. Regulation is maintained down to this level, enabling use in ultra-low-power applications such as battery-backed sensors and energy-harvesting systems where current budgets are tightly constrained.
How does the noise performance of TL4050B50IDBZT compare to other 5 V shunt references?
TL4050B50IDBZT delivers 93 μVRMS wideband noise (10 Hz–10 kHz), which is lower than LM4050B50IDBZR (120 μVRMS) and significantly lower than older references like TL431 (200+ μVRMS). This low noise directly translates to higher effective number of bits (ENOB) in 12-bit ADC systems - preserving <0.015 LSB added noise floor and supporting precision measurement without post-processing filtering.
Can TL4050B50IDBZT be used in a high-side sensing configuration?
Yes, TL4050B50IDBZT can be used in high-side sensing because it is a two-terminal shunt reference - its anode and cathode are fully floating relative to system ground. When placed between a positive rail and a sense node, it regulates the voltage difference across its terminals. This topology is commonly used in current-sense amplifiers and isolated power monitor circuits where ground-referenced references are impractical.
TL4050B50IDBZT 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):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050B50IDBZT FAQ
1.How can I place an order for TL4050B50IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B50IDBZT 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 TL4050B50IDBZT reliable?
The price and inventory of TL4050B50IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B50IDBZT is usually 5 days.
3.What payment methods are accepted for TL4050B50IDBZT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4050B50IDBZT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4050B50IDBZT?
TL4050B50IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050B50IDBZT 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 TL4050B50IDBZT?
For technical support, including TL4050B50IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B50IDBZT requirements.
6.How does Aetrix verify that TL4050B50IDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050B50IDBZT 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 TL4050B50IDBZT meets industry standards.
7.What is the process for return or replacement of TL4050B50IDBZT?
All TL4050B50IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B50IDBZT, 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 TL4050B50IDBZT part is unused and in its original packaging.
Return procedure for TL4050B50IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050B50IDBZT Tags
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