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Texas Instruments TL4050A41IDBZR
- Part No.:
- TL4050A41IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050A41IDBZR.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:7,381
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Product details
Overview
TL4050A41IDBZR from Texas Instruments is a precision micropower shunt voltage reference with a fixed 4.096V output, ±0.1% initial tolerance (A grade), 50ppm/°C max temperature coefficient, 93μVRMS wideband noise, and operation from –40°C to 85°C. It serves as a stable reference in high-resolution ADC/DAC circuits, portable power monitors, and industrial data-acquisition systems requiring low drift and minimal quiescent current.
For engineers reviewing the TL4050A41IDBZR datasheet, TL4050A41IDBZR pinout, TL4050A41IDBZR application, or TL4050A41IDBZR equivalent, this page delivers verified electrical specs, SOT-23-3 terminal mapping, real-world use cases in 12-bit data acquisition and battery-powered instrumentation, and validated alternative options for design flexibility.
Technical Context
The TL4050A41IDBZR operates as a two-terminal shunt reference, sinking cathode current (IZ) between 68μA min and 15mA max to maintain regulation. Its internal bandgap core delivers 4.096V with ±20ppm/°C typical tempco over 25°C and ±50ppm/°C max across full temperature range.
It exhibits 0.5Ω dynamic impedance at 1mA, requires no output capacitor, and remains stable under all capacitive loads. Thermal hysteresis is specified at 1.148mV, and long-term stability is 120ppm after 1000 hours at 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal - precisely matches 12-bit ADC full-scale LSB = 1mV when powered from 5V supply. |
| Initial Tolerance | ±0.1% at 25°C - enables high-accuracy calibration without trimming in production test. |
| Tempco | ±50ppm/°C max (–40°C to 85°C) - contributes ≤0.5mV drift over industrial temperature range. |
| Noise (10Hz–10kHz) | 93μVRMS - low enough to avoid degrading ENOB in 12-bit SAR ADCs like ADS7842. |
| Min Cathode Current | 68μA typical - supports ultra-low-power operation in battery-backed sensor nodes. |
| Dynamic Impedance | 0.5Ω at 1mA - ensures minimal load-induced voltage shift during fast transient current demands. |
| Operating Temp Range | –40°C to 85°C - qualified for industrial ambient environments without derating. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.3mm × 2.9mm footprint, 1.45mm height, and thermal resistance θJA = 206°C/W. RoHS-compliant, lead-free, and moisture-sensitive level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground node | Connected to system ground; forms return path for cathode current and defines reference potential. |
| Cathode (Pin 2) | Regulated output node | Sinks current to maintain 4.096V; connects to ADC VREF, DAC REF, or feedback network. |
| NC / Floating (Pin 3) | Unused terminal | Internally unconnected; must be left 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 space for external bypass caps while maintaining phase margin >45° across all load capacitances. |
| Micropower operation | 68μA minimum cathode current enables >10-year battery life in coin-cell–powered IoT sensors. |
| Low-noise reference | 93μVRMS noise floor preserves SNR in precision 12-bit data converters without requiring post-regulation filtering. |
| Wide current range | Operates reliably from 68μA to 15mA - accommodates both ultra-low-power sleep modes and high-speed sampling bursts. |
| Industrial temperature rating | –40°C to 85°C qualification ensures consistent 4.096V output in factory automation, energy metering, and motor control enclosures. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) digitizing analog sensor outputs in portable test equipment. IC Role / Device Role / Timing Role: Provides precise 4.096V reference voltage for ADC full-scale range, enabling 1mV LSB resolution. Use Value: Eliminates need for external trimming; ±0.1% tolerance ensures <0.5 LSB error before calibration. |
Use Scenario: Real-time monitoring of 3.3V/5V/12V rails in industrial PLC power modules. IC Role / Device Role / Timing Role: Serves as stable reference for comparator-based overvoltage/undervoltage detection circuitry. Use Value: 50ppm/°C tempco limits threshold drift to <±6mV over –40°C to 85°C, improving fault detection reliability. |
| Portable Instrumentation | Battery-Powered Equipment |
Use Scenario: Handheld multimeter measuring DC voltage with auto-ranging and digital display. IC Role / Device Role / Timing Role: Supplies reference to internal 16-bit sigma-delta ADC for high-accuracy DCV measurements. Use Value: 93μVRMS noise prevents RMS measurement errors; micropower operation extends alkaline battery life to >200 hours. |
Use Scenario: Wireless environmental sensor node using CR2032 coin cell and BLE MCU. IC Role / Device Role / Timing Role: References ADC channel measuring thermistor or humidity sensor output. Use Value: 68μA min IZ allows continuous sensing at <10μA average system current; SOT-23-3 footprint saves PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3041AIDBZR | 4.096V, ±0.2% initial tolerance, 100ppm/°C max tempco, 50μVRMS noise, SOT-23-3 | Higher noise sensitivity in low-SNR signal chains; looser tolerance increases calibration burden | Select when cost sensitivity outweighs 12-bit ADC accuracy requirements and lower noise is not critical. |
| ADR3440ARJZ-R7 | 4.096V, ±0.1% initial tolerance, 10ppm/°C max tempco, 7.5μVRMS noise, SOT-23-5 | Lower noise and superior tempco, but requires 5-pin layout and higher minimum operating current (120μA) | Choose for metrology-grade applications where 10ppm/°C drift and sub-10μV noise justify added complexity and cost. |
Compared with TL4050A41IDBZR, REF3041AIDBZR trades accuracy and noise performance for lower cost, while ADR3440ARJZ-R7 delivers significantly better stability and noise at the expense of pin count, layout compatibility, and quiescent current headroom.
Availability
TL4050A41IDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, industrial power-supply monitors, and portable instrumentation requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for TL4050A41IDBZR 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 was designed specifically for cost-sensitive, space-constrained applications needing precision shunt references with zero-output-capacitor stability and micropower operation.
FAQ
What is the output voltage tolerance of TL4050A41IDBZR at 25°C?
The TL4050A41IDBZR has a guaranteed initial output voltage tolerance of ±0.1% at 25°C, corresponding to ±4.1mV around the nominal 4.096V output. This specification is confirmed in Section 5.6 of the TI datasheet under TL4050A41I Electrical Characteristics, and applies across the full cathode current range of 68μA to 15mA.
Does TL4050A41IDBZR require an external output capacitor?
No, TL4050A41IDBZR does not require an external output capacitor. As stated in Section 8.1 and Feature list, it is stable with all capacitive loads and designed for zero-output-capacitor operation - eliminating BOM cost and PCB area while maintaining regulation integrity across load transients.
What is the minimum cathode current needed for TL4050A41IDBZR to regulate properly?
The TL4050A41IDBZR requires a minimum cathode current of 68μA (typical) and 73μA (max over –40°C to 85°C) to maintain regulation. This value is explicitly listed in Table 5.6 under "IZ,min" for TL4050A41I, and defines the lowest bias current usable in ultra-low-power designs.
How does TL4050A41IDBZR perform in terms of noise for precision ADC applications?
TL4050A41IDBZR delivers 93μVRMS wideband noise (10Hz–10kHz), measured at 100μA cathode current. This noise level is low enough to support 12-bit ADCs such as the ADS7842 without degrading effective number of bits (ENOB), as confirmed in Figure 6-4 and Section 5.6 of the datasheet.
What package type is used for TL4050A41IDBZR and what are its key mechanical attributes?
TL4050A41IDBZR uses the SOT-23-3 (DBZ) package: 1.3mm × 2.9mm body size, 1.45mm maximum height, and thermal resistance θJA = 206°C/W. Pin 3 is internally unused and must remain floating or be tied to Pin 2 to prevent parasitic conduction, per Section 8.2 of the datasheet.
TL4050A41IDBZR 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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050A41IDBZR FAQ
1.How can I place an order for TL4050A41IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A41IDBZR 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 TL4050A41IDBZR reliable?
The price and inventory of TL4050A41IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A41IDBZR is usually 5 days.
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Once your TL4050A41IDBZR 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 TL4050A41IDBZR?
For technical support, including TL4050A41IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A41IDBZR requirements.
6.How does Aetrix verify that TL4050A41IDBZR is sourced from the original manufacturer or authorized distributors?
All TL4050A41IDBZR 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 TL4050A41IDBZR meets industry standards.
7.What is the process for return or replacement of TL4050A41IDBZR?
All TL4050A41IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A41IDBZR, 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 TL4050A41IDBZR part is unused and in its original packaging.
Return procedure for TL4050A41IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A41IDBZR Tags
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TL431AIDBZR
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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