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Texas Instruments TL4050A10QDBZT
- Part No.:
- TL4050A10QDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050A10QDBZT.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,105
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Product details
Overview
TL4050A10QDBZT from Texas Instruments is a precision micropower shunt voltage reference delivering a fixed 10V output with ±0.1% initial tolerance and ±50ppm/°C temperature coefficient over –40°C to 125°C. It operates from 60μA to 15mA cathode current, exhibits 150μVRMS wideband noise, and maintains stability with all capacitive loads-ideal for high-accuracy ADC/DAC biasing in automotive and industrial power-supply monitors.
For engineers reviewing the TL4050A10QDBZT datasheet, TL4050A10QDBZT pinout, TL4050A10QDBZT application, or TL4050A10QDBZT equivalent, key selection criteria include its A-grade accuracy, extended temperature qualification, SOT-23-3 package footprint, and shunt topology enabling simple two-terminal implementation in space-constrained, high-reliability systems.
Technical Context
The TL4050A10QDBZT functions as a two-terminal shunt reference, regulating voltage by sinking adjustable cathode current while maintaining a stable 10V reverse breakdown across anode and cathode terminals. Its internal bandgap core achieves low dynamic impedance (0.7Ω at 1mA) and thermal hysteresis of only 2.8mV after –40°C/125°C cycling.
Designed for operation without output capacitance, it supports direct connection to high-impedance loads and integrates robust ESD protection (±2kV HBM). The device's 100μA typical minimum cathode current and 15mA absolute maximum rating define its usable current window for precision biasing in data-acquisition front-ends and closed-loop power monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10V nominal; enables direct full-scale reference for 10-bit+ ADCs with 10V input range. |
| Initial Tolerance | ±0.1% at 25°C; ensures ≤10mV absolute error before calibration in production test fixtures. |
| Temp Coefficient | ±50ppm/°C over –40°C to 125°C; contributes ≤6mV drift across full automotive temperature range. |
| Noise (10Hz–10kHz) | 150μVRMS; limits resolution loss to <0.015 LSB in 16-bit 10V-range systems. |
| Cathode Current Range | 100μA (typ) to 15mA; allows flexible RS resistor sizing for varying supply/load conditions. |
| Dynamic Impedance | 0.7Ω at 1mA; minimizes load-induced output variation during transient current steps. |
| Long-Term Stability | 120ppm over 1000h; supports >10-year calibration intervals in energy metering applications. |
Pinout & Package
SOT-23-3 package (DBZ), 2.92mm × 1.3mm × 1.02mm body, gull-wing leads, JEDEC MO-178AA compliant. Thermal resistance θJA = 206°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground return | Connected to system ground; forms low-impedance return path for cathode current and load current. |
| Cathode (Pin 2) | Output voltage node | Provides regulated 10V output; sinks total current (IZ + IL); requires external series resistor (RS) from supply. |
| No-connect (Pin 3) | Unused terminal | Internally floating; must remain unconnected or tied to Pin 2 per TI SOT-23 layout guidance to avoid parasitic Schottky conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 10V output | Eliminates external resistor divider, reducing BOM count and layout sensitivity in precision analog signal chains. |
| Stable with all capacitive loads | Removes need for output capacitor, simplifying design and improving reliability in battery-powered sensor nodes. |
| Extended temperature range (–40°C to 125°C) | Qualifies for under-hood automotive and industrial control applications without derating or thermal shielding. |
| Low 150μVRMS noise | Preserves ENOB in high-resolution data acquisition systems using 16-bit or higher SAR ADCs. |
| 0.1% initial accuracy (A grade) | Reduces or eliminates factory calibration steps in portable instrumentation and process transmitters. |
Applications
| Automotive Power-Supply Monitor | Industrial Data-Acquisition Front-End |
|---|---|
Use Scenario: Monitoring 12V battery rail and 5V MCU supply in engine control units with diagnostic logging. IC Role / Device Role / Timing Role: Shunt reference providing stable 10V reference for dual-channel ADC measuring supply voltages against known baseline. Use Value: Enables detection of ±50mV supply deviations (0.5% of 10V) across –40°C to 125°C, meeting ISO 16750-2 requirements. | Use Scenario: Biasing 16-bit SAR ADC in programmable logic controller analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference establishing full-scale input range for isolated current/voltage measurement channels. Use Value: Delivers <0.02% total error contribution (initial + temp + noise), supporting 14-bit effective resolution in 4–20mA loop receivers. |
| Energy Meter Reference | Portable Test Equipment Calibration |
Use Scenario: Providing reference for metrology-grade polyphase energy meter ICs (e.g., ADE7880) in smart grid endpoints. IC Role / Device Role / Timing Role: Primary shunt reference generating 10V for ADC reference and internal DAC calibration. Use Value: 120ppm long-term stability ensures <0.01% metering error drift over 10 years, satisfying IEC 62053-21 Class 0.2 accuracy. | Use Scenario: Embedded reference in handheld multimeter or oscilloscope probe calibration subsystem. IC Role / Device Role / Timing Role: On-board precision reference used to auto-calibrate gain/offset of analog front-end amplifiers and ADCs. Use Value: ±0.1% initial tolerance and ±50ppm/°C TC enable single-point calibration at room temperature with <0.05% error across operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3010AIDBZR | 10V, ±0.2% initial tolerance, ±50ppm/°C, 50μA min current, SC-70 package | Lower quiescent current but wider initial tolerance; not qualified to 125°C | Select for ultra-low-power battery applications where 125°C operation is unnecessary and 0.2% tolerance is acceptable. |
| ADR3410ARJZ-R7 | 10V, ±0.1% initial tolerance, ±25ppm/°C, 120μA min current, SOT-23 package | Better tempco (±25ppm/°C) but higher minimum current and no 125°C Q-grade option | Select when tighter temperature drift is critical and ambient temperature stays below 105°C. |
Compared with TL4050A10QDBZT, REF3010AIDBZR trades extended temperature capability for lower operating current, while ADR3410ARJZ-R7 improves temperature stability at the cost of higher minimum cathode current and absence of automotive-grade qualification.
Availability
TL4050A10QDBZT is available at Aetrix Electronics and suitable for automotive power-supply monitoring, industrial data-acquisition systems, and energy metering applications requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TL4050A10QDBZT 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The TL4050 series belongs to TI's precision voltage reference product line, engineered specifically for high-accuracy, low-power shunt regulation in harsh-environment applications where space, thermal resilience, and long-term stability are critical.
FAQ
What is the operating temperature range specified for TL4050A10QDBZT?
The TL4050A10QDBZT is characterized for operation across –40°C to +125°C ambient temperature. This extended range is explicitly defined in Section 5.11 of the datasheet as the "TL4050x10Q Electrical Characteristics" table and qualifies the device for under-hood automotive and industrial control environments where thermal stress exceeds standard industrial grade limits.
Does TL4050A10QDBZT require an output capacitor for stability?
No, TL4050A10QDBZT does not require an output capacitor for stability. As confirmed in Section 8.1 and the Features list, it is designed to remain stable with all capacitive loads-including zero capacitance-and no external capacitor is needed for proper operation, simplifying PCB layout and reducing component count in space-constrained designs.
What is the minimum cathode current required for TL4050A10QDBZT to maintain regulation?
The TL4050A10QDBZT requires a minimum cathode current of 100μA (typical) at 25°C, with a maximum of 110μA across the full –40°C to 125°C range, as specified in Table 5.11. This value defines the lower bound of the RS resistor calculation to ensure reliable 10V regulation under worst-case temperature and load conditions.
How does the noise performance of TL4050A10QDBZT impact high-resolution ADC applications?
With 150μVRMS wideband noise (10Hz–10kHz), TL4050A10QDBZT contributes approximately 0.015 LSB of noise to a 16-bit, 10V-full-scale ADC. This level preserves effective resolution in precision measurement systems, as confirmed in Figure 6-4 and Section 5.11, making it suitable for 14–16-bit data-acquisition applications without additional filtering.
What is the function of Pin 3 on the TL4050A10QDBZT SOT-23-3 package?
Pin 3 of the TL4050A10QDBZT is a no-connect terminal. Due to a parasitic Schottky diode between Pins 2 and 3 in the SOT-23 package, TI explicitly recommends leaving Pin 3 floating or connecting it directly to Pin 2 (Cathode) to prevent unintended conduction paths-details are provided in Section 8.2 of the datasheet.
TL4050A10QDBZT 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:
- Discontinued at Digi-Key
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 150µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 110 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050A10QDBZT FAQ
1.How can I place an order for TL4050A10QDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050A10QDBZT 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 TL4050A10QDBZT reliable?
The price and inventory of TL4050A10QDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050A10QDBZT is usually 5 days.
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Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
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For technical support, including TL4050A10QDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050A10QDBZT requirements.
6.How does Aetrix verify that TL4050A10QDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050A10QDBZT 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 TL4050A10QDBZT meets industry standards.
7.What is the process for return or replacement of TL4050A10QDBZT?
All TL4050A10QDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050A10QDBZT, 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 TL4050A10QDBZT part is unused and in its original packaging.
Return procedure for TL4050A10QDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050A10QDBZT Tags
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TL431AIDBZR
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TL431BQDBZR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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AZ431LANTR-G1
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