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Texas Instruments TL4051BQDBZR
- Part No.:
- TL4051BQDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051BQDBZR.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,036
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Product details
Overview
TL4051BQDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.2% initial accuracy (B grade), 50ppm/°C temperature coefficient, 20μVRMS wideband noise, and stable operation from 60μA to 12mA cathode current. It operates across –40°C to 125°C and is used in high-accuracy data acquisition systems requiring low-drift, low-noise biasing.
For engineers reviewing the TL4051BQDBZR datasheet, TL4051BQDBZR pinout, TL4051BQDBZR application, or TL4051BQDBZR equivalent, key selection criteria include its extended-temperature qualification, SOT-23-3 package compatibility, shunt topology for flexible biasing, and absence of required output capacitance in precision analog signal chains.
Technical Context
The TL4051BQDBZR implements a two-terminal shunt reference architecture with internal bandgap core and buffered feedback path. Its cathode-anode configuration enables direct connection to high-impedance nodes without series resistance, while the FB terminal (pin 2) supports adjustable versions - though not used in this fixed 1.225V variant.
It delivers stable regulation under capacitive loads up to 10µF without oscillation, maintains <0.5Ω dynamic impedance at 1mA, and exhibits thermal hysteresis of only 0.36mV/V over –40°C to 125°C cycling - critical for metrology-grade instrumentation and automotive sensor conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V ±0.2% at 25°C - enables precise ADC/DAC reference without external resistor network. |
| Temp Coefficient | Max ±50ppm/°C over –40°C to 125°C - ensures ≤±0.62mV drift across full operating range. |
| Noise (10Hz–10kHz) | 20μVRMS typical - minimizes contribution to system noise floor in 16-bit+ data converters. |
| Cathode Current Range | 60μA to 12mA - supports ultra-low-power sensor interfaces and high-current precision regulators. |
| Dynamic Impedance | 0.5Ω at 1mA, 120Hz - provides tight regulation against load transients in battery-powered equipment. |
| Long-Term Stability | 120ppm after 1000h - ensures calibration integrity in energy metering and industrial control systems. |
| Thermal Hysteresis | 0.36mV/V - guarantees repeatable voltage after thermal cycling in automotive under-hood applications. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.0mm pitch, 2.92mm × 1.3mm footprint, and 1.02mm height - optimized for space-constrained PCB layouts in portable and automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connects to regulated voltage rail; sinks all cathode current (IZ) and load current (IL) in shunt configuration. |
| Anode (Pin 2) | Ground reference terminal | Common return path; must be tied to system ground or low-impedance reference plane for stability. |
| NC / FB (Pin 3) | No-connect (fixed version) | Internally unused in TL4051BQDBZR; must be left floating per TI design guidance to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates stably with any capacitive load up to 10µF - eliminates BOM cost and layout risk of external bypass caps. |
| Extended temperature range | Rated for –40°C to 125°C ambient - qualified for engine control units, battery management, and industrial motor drives. |
| Low minimum cathode current | 60μA typical IZ,min - enables use with high-value bias resistors in 3.3V/5V systems for <100μA quiescent power. |
| ESD robustness | ±2000V HBM rating - withstands handling and board-level ESD events without parameter shift or failure. |
| Low thermal hysteresis | 0.36mV/V - preserves measurement repeatability after thermal cycling in field-deployed test equipment. |
Applications
| Data-Acquisition Systems | Automotive Sensor Conditioning |
|---|---|
Use Scenario: High-resolution 18-bit SAR ADC front-end in portable multimeters and calibration standards. IC Role / Device Role / Timing Role: Precision 1.225V reference for ADC VREF input, establishing absolute measurement scale. Use Value: ±0.2% initial tolerance and 50ppm/°C drift ensure <±0.005% full-scale error over temperature without recalibration. |
Use Scenario: Biasing thermistor networks and pressure transducers in engine control modules. IC Role / Device Role / Timing Role: Stable excitation voltage source for ratiometric sensor bridges operating at 125°C ambient. Use Value: Extended-temperature qualification and 0.36mV/V thermal hysteresis prevent offset drift during cold-start/warm-up cycles. |
| Energy Metering | Battery-Powered Instrumentation |
Use Scenario: Reference for polyphase energy meter ICs measuring active/reactive power in smart grid endpoints. IC Role / Device Role / Timing Role: Primary voltage reference for metrology ADCs sampling current/voltage waveforms at 8kHz. Use Value: 20μVRMS noise and 120ppm long-term stability maintain Class 0.2 accuracy over 10-year field life. |
Use Scenario: Low-power handheld oscilloscope with 12-bit ADC and 100ksps sampling rate. IC Role / Device Role / Timing Role: Shunt reference supplying regulated 1.225V to ADC and analog front-end from single Li-ion cell. Use Value: 60μA minimum cathode current allows operation down to 2.7V supply with >100-hour 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 |
|---|---|---|---|
| TL4051B12QDBZR | Same device, identical electrical specs and DBZ package - differs only in top-side marking (TNW3/TNWU vs TN6_). | No functional difference; both rated for –40°C to 125°C and share identical production lot traceability. | Select TL4051BQDBZR when matching existing BOMs with TI's standard orderable part number format. |
| REF3012AIDBZR | 1.2V output, ±0.2% initial accuracy, but higher 50μVRMS noise and 100ppm/°C tempco (max). | Limited to industrial temp range (–40°C to 85°C); unsuitable for under-hood automotive use. | Choose REF3012AIDBZR only if lower cost is prioritized over noise performance and extended temperature capability. |
Compared with TL4051B12QDBZR, TL4051BQDBZR offers identical performance and qualification - the former is a legacy ordering variant. Against REF3012AIDBZR, TL4051BQDBZR provides 2.5× lower noise and guaranteed 125°C operation, making it superior for metrology and automotive applications.
Availability
TL4051BQDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, automotive sensor conditioning, and energy metering requiring stable component supply with full traceability and extended-temperature assurance.
Supply support for TL4051BQDBZR 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 specializing in analog and embedded processing technologies, with decades of expertise in precision voltage references and power management ICs.
The TL4051 product line was designed for high-accuracy, low-power shunt reference applications in harsh environments - emphasizing stability, noise immunity, and extended-temperature reliability for industrial, automotive, and test equipment markets.
FAQ
What is the operating temperature range for TL4051BQDBZR?
The TL4051BQDBZR is characterized for operation from –40°C to +125°C ambient temperature. This extended range is confirmed in Section 5.5 of the datasheet (TL4051x12Q Electrical Characteristics) and supports use in automotive under-hood electronics, industrial motor controls, and outdoor energy metering where thermal extremes occur.
Does TL4051BQDBZR require an output capacitor?
No, TL4051BQDBZR does not require an output capacitor for stability. As stated in Section 7.1, it is designed to remain stable with all capacitive loads - including 0μF - eliminating the need for external bypass components and reducing BOM count and PCB area in space-constrained designs.
What is the pin configuration and function of TL4051BQDBZR?
TL4051BQDBZR uses the SOT-23-3 (DBZ) package with three pins: Pin 1 = Cathode (output), Pin 2 = Anode (ground), Pin 3 = NC/FB (no-connect in fixed-voltage variants). Pin 3 must be left floating per TI's guidance in Section 7.2 to avoid parasitic coupling from the internal Schottky diode between pins 2 and 3.
How does TL4051BQDBZR compare to the A-grade version TL4051AQDBZR?
TL4051BQDBZR has ±0.2% initial accuracy and same 50ppm/°C max temperature coefficient as TL4051AQDBZR (±0.1%), but with relaxed initial tolerance. Both share identical noise (20μVRMS), dynamic impedance (0.5Ω), and temperature range (–40°C to 125°C), making TL4051BQDBZR a cost-optimized choice where ±0.2% meets system accuracy requirements.
Can TL4051BQDBZR be used in adjustable configurations?
No, TL4051BQDBZR is the fixed 1.225V version and lacks functional feedback (FB) capability. Adjustable operation requires TL4051BQDBZR's sibling part TL4051BQDBZR - which includes an active FB pin and internal 1.212V reference - and uses an external resistor divider to set output voltage from 1.225V to 10V.
TL4051BQDBZR 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:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.212V
- Voltage - Output (Max):
- 10 V
- Current - Output:
- 12 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4051BQDBZR FAQ
1.How can I place an order for TL4051BQDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051BQDBZR 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 TL4051BQDBZR reliable?
The price and inventory of TL4051BQDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051BQDBZR is usually 5 days.
3.What payment methods are accepted for TL4051BQDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051BQDBZR transactions.
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4.How is shipping managed for TL4051BQDBZR?
TL4051BQDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051BQDBZR 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 TL4051BQDBZR?
For technical support, including TL4051BQDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051BQDBZR requirements.
6.How does Aetrix verify that TL4051BQDBZR is sourced from the original manufacturer or authorized distributors?
All TL4051BQDBZR 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 TL4051BQDBZR meets industry standards.
7.What is the process for return or replacement of TL4051BQDBZR?
All TL4051BQDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051BQDBZR, 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 TL4051BQDBZR part is unused and in its original packaging.
Return procedure for TL4051BQDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051BQDBZR Tags
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