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Texas Instruments TL4051B12IDBZR
- Part No.:
- TL4051B12IDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051B12IDBZR.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,550
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Product details
Overview
TL4051B12IDBZR 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 85°C and is used in high-accuracy data acquisition, battery-powered instrumentation, and power-supply monitoring circuits where low drift and minimal quiescent current are critical.
For engineers reviewing the TL4051B12IDBZR datasheet, TL4051B12IDBZR pinout, TL4051B12IDBZR application, or TL4051B12IDBZR equivalent, key selection criteria include initial tolerance at 25°C, temperature coefficient over full range, dynamic impedance at 1mA, long-term stability after 1000 hours, and compatibility with capacitive loads without external compensation.
Technical Context
The TL4051B12IDBZR implements a bandgap-based shunt reference architecture optimized for micropower operation. Its internal circuitry maintains regulation by sinking variable cathode current while holding the cathode-to-anode voltage at precisely 1.225V under load, with feedback derived from an internal reference node.
It requires no output capacitor and remains stable with any capacitive load due to inherent pole-zero compensation. The device's low 0.5Ω dynamic impedance at 1mA and 20μVRMS noise support high-resolution ADC biasing and low-noise analog signal chains in portable and industrial systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V at IZ = 100μA, 25°C - provides stable reference for 12-bit+ SAR ADCs and precision comparators. |
| Initial Tolerance | ±0.2% max at 25°C - enables direct use in 0.5% system-level accuracy designs without calibration. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 85°C - ensures ≤0.625mV drift across full industrial range. |
| Noise (10Hz–10kHz) | 20μVRMS typical - supports low-noise sensor front-ends and audio-grade voltage references. |
| Cathode Current Range | 60μA to 12mA - allows operation in ultra-low-power sleep modes and higher-current regulation loops. |
| Dynamic Impedance | 0.5Ω at IZ = 1mA, 120Hz - minimizes output voltage perturbation during transient load changes. |
| Long-Term Stability | 120ppm after 1000h - ensures reference integrity in metering and industrial control applications over years. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92mm × 1.3mm surface-mount outline with gull-wing leads, rated for industrial temperature range (–40°C to 85°C), RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Regulated output node | Connected to supply rail via series resistor; sinks all reference and load current; voltage referenced to Anode. |
| Anode (Pin 2) | Ground/reference return | Low-impedance return path; must be tied to system ground or lowest potential point in shunt configuration. |
| NC / Test (Pin 3) | No-connect (floating) | Internally unused; must be left open or connected to Anode per EMI guidance; not functional in fixed-voltage variant. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output bypass capacitor - reduces BOM count and PCB area in space-constrained designs. |
| Low 60μA minimum cathode current | Enables operation from coin cells or energy-harvesting sources where supply current is limited to <100μA. |
| 20μVRMS wideband noise | Supports 16-bit+ resolution in precision data loggers without requiring external filtering or averaging. |
| ±50ppm/°C tempco over full range | Guarantees <±1mV output variation across –40°C to 85°C - suitable for uncalibrated field-deployed equipment. |
| Robust ESD rating | ±2000V HBM - withstands handling and board assembly without special precautions beyond standard ESD controls. |
Applications
| Data Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution sensor signal conditioning in portable environmental monitors. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for 16-bit delta-sigma ADCs measuring thermocouple or RTD outputs. Use Value: Enables ±0.1°C temperature measurement accuracy over –20°C to 70°C ambient without calibration. |
Use Scenario: Real-time monitoring of 3.3V/5V rails in industrial PLC backplanes. IC Role / Device Role / Timing Role: Sinks current through resistor divider to generate precise threshold for comparator-based fault detection. Use Value: Detects >±1.5% supply deviation with <10μs response time, supporting fail-safe shutdown logic. |
| Process Control Transmitters | Battery-Powered Equipment |
Use Scenario: 4–20mA loop-powered pressure transmitter with onboard microcontroller. IC Role / Device Role / Timing Role: Supplies reference voltage for DAC generating loop current setpoint and for ADC reading sensor bridge. Use Value: Maintains <±0.05% full-scale linearity over 10-year field life, meeting SIL-2 functional safety requirements. |
Use Scenario: Wearable health sensor using CR2032 coin cell with multi-year shelf life. IC Role / Device Role / Timing Role: Reference for ultra-low-power ADC sampling ECG and SpO₂ signals in sleep mode. Use Value: Draws only 60μA quiescent current, extending battery life to >36 months at 1 sample/sec duty cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4051A12IDBZR | ±0.1% initial tolerance (vs. ±0.2%); identical tempco, noise, and package | Required for 0.25% system accuracy targets; adds ~15% cost premium | Select when absolute initial accuracy dominates long-term stability or thermal drift in calibration-critical systems. |
| REF3012AIDBZR | 1.2V output, ±0.2% tolerance, 50ppm/°C, but higher 50μVRMS noise and 50μA min current | Higher noise limits use in 14-bit+ ADCs; wider operating temp (–40°C to 125°C) | Prefer for automotive under-hood applications needing extended temperature range, accepting higher noise penalty. |
Compared with TL4051A12IDBZR, the TL4051B12IDBZR trades 0.1% initial accuracy for lower cost while retaining identical thermal performance and noise; versus REF3012AIDBZR, it delivers 2.5× lower noise and tighter dynamic impedance at the expense of narrower temperature range.
Availability
TL4051B12IDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply, consistent parametric performance, and long-term availability in SOT-23-3 packaging.
Supply support for TL4051B12IDBZR 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, power management, and signal chain solutions.
The TL4051 series belongs to TI's precision voltage reference product line, designed specifically for micropower, low-drift applications in portable instrumentation, industrial sensing, and energy metering where size, accuracy, and long-term stability are paramount.
FAQ
What is the guaranteed output voltage tolerance of TL4051B12IDBZR at 25°C?
The TL4051B12IDBZR guarantees ±0.2% initial output voltage tolerance at 25°C, corresponding to ±2.45mV around the nominal 1.225V output. This specification is verified per TI's production test flow and applies to all units shipped under this orderable part number.
Does TL4051B12IDBZR require an external output capacitor for stability?
No, TL4051B12IDBZR does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load, including 0μF. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability.
What is the minimum cathode current needed for TL4051B12IDBZR to maintain regulation?
The TL4051B12IDBZR requires a minimum cathode current of 60μA (typical) and 65μA (max over temperature) to maintain specified output voltage accuracy. Below this, regulation degrades and VZ drops nonlinearly.
Can TL4051B12IDBZR operate in automotive under-hood environments?
No, TL4051B12IDBZR is characterized for –40°C to 85°C only. For under-hood use up to 125°C, TI specifies the TL4051B12QDBZR variant, which shares identical electrical specs but is qualified across the extended temperature range.
How does the noise performance of TL4051B12IDBZR compare to other 1.2V shunt references?
TL4051B12IDBZR delivers 20μVRMS (10Hz–10kHz), among the lowest in its class. Competing devices like REF3012AIDBZR specify 50μVRMS, making TL4051B12IDBZR preferred for 16-bit+ data acquisition where noise directly limits effective resolution.
TL4051B12IDBZR 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):
- 1.225V
- Voltage - Output (Max):
- -
- 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:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4051B12IDBZR FAQ
1.How can I place an order for TL4051B12IDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051B12IDBZR 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 TL4051B12IDBZR reliable?
The price and inventory of TL4051B12IDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051B12IDBZR is usually 5 days.
3.What payment methods are accepted for TL4051B12IDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051B12IDBZR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051B12IDBZR?
TL4051B12IDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051B12IDBZR 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 TL4051B12IDBZR?
For technical support, including TL4051B12IDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051B12IDBZR requirements.
6.How does Aetrix verify that TL4051B12IDBZR is sourced from the original manufacturer or authorized distributors?
All TL4051B12IDBZR 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 TL4051B12IDBZR meets industry standards.
7.What is the process for return or replacement of TL4051B12IDBZR?
All TL4051B12IDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051B12IDBZR, 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 TL4051B12IDBZR part is unused and in its original packaging.
Return procedure for TL4051B12IDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051B12IDBZR Tags
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TL431BQDBZR
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