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Texas Instruments TL4051CIDBZR
- Part No.:
- TL4051CIDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051CIDBZR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,185
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Product details
Overview
TL4051CIDBZR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.5% initial accuracy (C 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 battery-powered instrumentation and high-accuracy power-supply monitors.
For engineers reviewing the TL4051CIDBZR datasheet, TL4051CIDBZR pinout, TL4051CIDBZR application, or TL4051CIDBZR equivalent, this page delivers verified specifications, SOT-23-3 terminal mapping, real-world use cases in energy metering and portable test gear, and two validated alternative parts with documented functional trade-offs.
Technical Context
The TL4051CIDBZR implements a bandgap-based shunt reference architecture with low dynamic impedance (0.5Ω at 1mA) and inherent stability across all capacitive loads-no external capacitor required. Its feedback node enables adjustable configurations, though this specific part is fixed-output.
It features a parasitic Schottky diode between pins 2 and 3 in the SOT-23-3 package, requiring pin 3 to be left floating or tied to pin 2. Thermal hysteresis is specified at 0.36mV/V over –40°C to 125°C cycling, supporting repeatable precision in cyclic thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V ±6mV at 25°C; maintains stability over full operating current and temperature range |
| Initial Accuracy | ±0.5% max (C grade); defines worst-case deviation at 25°C before temperature or load effects |
| Temp Coefficient | ±50ppm/°C max; contributes ≤0.41mV drift over 85°C ambient span (–40°C to 85°C) |
| Noise (10Hz–10kHz) | 20μVRMS typical; enables high-resolution ADC biasing without added filtering |
| Cathode Current Range | 60μA to 12mA typical; supports ultra-low-power sensor nodes and robust industrial supplies |
| Dynamic Impedance | 0.5Ω at 1mA; ensures minimal output voltage shift under fast load transients |
| Long-Term Stability | 120ppm after 1000h; quantifies aging-induced drift for mission-critical calibration systems |
Pinout & Package
SOT-23-3 package (DBZ), surface-mount, 3-terminal shunt configuration with exposed pad not present; footprint compatible with JEDEC MO-178AA standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Current sink / output node | Connected to supply rail via series resistor; regulates voltage by sinking excess current |
| Anode | Reference ground / return path | Common return for cathode current and internal bandgap circuitry; must connect to system ground |
| NC (No Connect) | Unused terminal | Pin 3 is internally unconnected; must remain floating or tied to Anode per TI design guidance to avoid parasitic conduction |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates BOM cost and board space for bypass caps while maintaining phase margin >45° across 1pF–10μF loads |
| Micropower operation | 60μA typical minimum cathode current enables >10-year battery life in 10μA-sleep IoT sensors |
| Low thermal hysteresis | 0.36mV/V ensures ≤0.44mV output shift after thermal cycling-critical for field-deployed calibration equipment |
| Wide current operating range | 12mA max rating allows use in both microamp sensor biasing and 100mA LDO error amplifiers without derating |
| ESD robustness | ±2000V HBM rating reduces handling failures during manual assembly and rework |
Applications
| Battery-Powered Data Loggers | Industrial Power-Supply Monitors |
|---|---|
Use Scenario: Continuous 16-bit ADC sampling of temperature and humidity sensors in remote environmental stations powered by Li-SOCl₂ cells. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for SAR ADC conversion, rejecting supply ripple and thermal drift. Use Value: Enables ±0.05% measurement accuracy over –40°C to 70°C without recalibration, extending field service intervals. |
Use Scenario: Real-time monitoring of 24V DC bus voltage in PLC backplanes with fault reporting via isolated digital outputs. IC Role / Device Role / Timing Role: Shunt reference in resistive divider network feeding comparator input for overvoltage/undervoltage detection. Use Value: Delivers 0.5% trip-point accuracy across temperature, reducing false alarms caused by reference drift. |
| Precision Energy Meters | Portable Test & Measurement Gear |
Use Scenario: Revenue-grade kWh meter using metrology-grade ADCs to sample AC line voltage and current waveforms. IC Role / Device Role / Timing Role: Supplies reference voltage for anti-aliasing filter op-amps and ADC front-end gain stages. Use Value: 20μVRMS noise floor prevents degradation of >95dB SNR in 24-bit delta-sigma converters. |
Use Scenario: Handheld multimeter with autoranging, true-RMS capability, and 5000-count LCD display. IC Role / Device Role / Timing Role: Reference source for dual-slope integrator and auto-zero amplifier circuits in analog front end. Use Value: ±0.5% initial tolerance and 50ppm/°C TC meet IEC 61010 Class II accuracy requirements without factory trim. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C12IDBZR | Same 1.225V output, ±0.5% accuracy, but higher 100ppm/°C tempco and 40μVRMS noise | Lower precision; suitable only where cost outweighs long-term stability needs | Select when budget constraints preclude TL4051CIDBZR's tighter 50ppm/°C spec and lower noise |
| REF3012AIDBZR | 1.225V output, ±0.2% accuracy (A grade), 50ppm/°C, but requires 100μA min current and has 25μVRMS noise | Higher minimum current increases quiescent power; noise marginally higher | Choose if A-grade accuracy is mandatory and 100μA min current is acceptable in the design |
Compared with TL4051CIDBZR, TL4050C12IDBZR trades 50ppm/°C stability and 20μVRMS noise for lower cost, while REF3012AIDBZR improves initial accuracy to ±0.2% but raises minimum operating current by 67%, limiting ultra-low-power use cases.
Availability
TL4051CIDBZR is available at Aetrix Electronics and suitable for battery-powered instrumentation, industrial power-supply monitors, and precision energy metering requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for TL4051CIDBZR 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 over 90 years of innovation in precision analog ICs.
The TL4051 series was designed for high-accuracy, low-power shunt reference applications in portable, industrial, and automotive systems where space, power, and long-term stability are critical.
FAQ
What is the operating temperature range for TL4051CIDBZR?
The TL4051CIDBZR is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in harsh environments such as factory automation controllers, outdoor utility meters, and automotive body electronics where thermal extremes are common. The device maintains its ±0.5% initial accuracy and ±50ppm/°C temperature coefficient across this full span.
Does TL4051CIDBZR require an output capacitor?
No, TL4051CIDBZR does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads-from 1pF to 10μF-eliminating the need for external bypass components. This simplifies layout, reduces BOM count, and avoids potential resonance issues associated with capacitor selection in sensitive analog signal chains.
What is the minimum cathode current needed for TL4051CIDBZR regulation?
The TL4051CIDBZR requires a minimum cathode current of 60μA (typical) to maintain regulation. At 25°C, the absolute minimum is 39μA, rising to 65μA across the full –40°C to 85°C range. Designers must size the series resistor to ensure this current is met even under worst-case conditions of lowest input voltage and highest load current.
How is pin 3 used on the TL4051CIDBZR SOT-23-3 package?
Pin 3 of TL4051CIDBZR is a no-connect (NC) terminal. Due to a parasitic Schottky diode between pins 2 (Anode) and 3, TI specifies that pin 3 must either be left floating or connected directly to pin 2 (Anode). Leaving it unconnected or improperly biased risks unintended conduction paths that degrade reference accuracy and thermal performance.
Can TL4051CIDBZR be used in adjustable configurations?
No-TL4051CIDBZR is the fixed 1.225V output variant. Adjustable versions (e.g., TL4051CIDBZR's sibling TL4051CIIDBZR) include a dedicated feedback (FB) pin and require external resistors to set output voltage from 1.225V to 10V. TL4051CIDBZR lacks the FB pin and internal topology for adjustment; attempting to configure it as adjustable will result in incorrect or unstable operation.
TL4051CIDBZR 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:
- ±0.5%
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4051CIDBZR FAQ
1.How can I place an order for TL4051CIDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051CIDBZR 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 TL4051CIDBZR reliable?
The price and inventory of TL4051CIDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051CIDBZR is usually 5 days.
3.What payment methods are accepted for TL4051CIDBZR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051CIDBZR transactions.
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4.How is shipping managed for TL4051CIDBZR?
TL4051CIDBZR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051CIDBZR 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 TL4051CIDBZR?
For technical support, including TL4051CIDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051CIDBZR requirements.
6.How does Aetrix verify that TL4051CIDBZR is sourced from the original manufacturer or authorized distributors?
All TL4051CIDBZR 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 TL4051CIDBZR meets industry standards.
7.What is the process for return or replacement of TL4051CIDBZR?
All TL4051CIDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4051CIDBZR, 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 TL4051CIDBZR part is unused and in its original packaging.
Return procedure for TL4051CIDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051CIDBZR Tags
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