My Inquiry
My Account
Texas Instruments TL4051A12IDBZRG4
- Part No.:
- TL4051A12IDBZRG4
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4051A12IDBZRG4.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,509
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TL4051A12IDBZRG4 from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.1% initial accuracy (A grade), 50ppm/°C temperature coefficient, 20μVRMS wideband noise, and stable operation from 60μA to 12mA cathode current. It serves as a high-stability reference in portable data-acquisition systems and low-power power-supply monitors.
For engineers reviewing the TL4051A12IDBZRG4 datasheet, TL4051A12IDBZRG4 pinout, TL4051A12IDBZRG4 application, or TL4051A12IDBZRG4 equivalent, key selection criteria include initial tolerance, thermal drift over –40°C to 85°C, dynamic impedance under varying load currents, noise performance in precision ADC biasing, and compatibility with capacitive loads without external stabilization.
Technical Context
The TL4051A12IDBZRG4 implements a bandgap-based shunt reference architecture optimized for micropower operation. Its internal circuit maintains regulation by sinking cathode current proportional to error between sensed voltage and internal 1.225V reference, enabling stable output across wide current and temperature ranges.
It operates exclusively in shunt mode with no series pass element, requiring an external current-setting resistor. The device exhibits low dynamic impedance (0.5Ω at 1mA, 120Hz) and negligible dependence on output capacitance-enabling direct use with high-impedance inputs like SAR ADC references or op-amp feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V - enables direct replacement of legacy 1.2V references with tighter tolerance and lower drift. |
| Initial Accuracy | ±0.1% max at 25°C - ensures ≤1.23 mV absolute error in precision sensor signal chains. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 85°C - contributes ≤6.1 μV/°C drift in industrial temperature monitoring. |
| Noise (10Hz–10kHz) | 20μVRMS typical - supports 16-bit+ resolution in battery-powered instrumentation without added filtering. |
| Cathode Current Range | 60μA to 12mA - allows operation from ultra-low-power wake-up circuits up to moderate-load regulators. |
| Dynamic Impedance | 0.5Ω at 1mA - minimizes output voltage shift under transient load changes in precision DAC buffers. |
| Long-Term Stability | 120ppm after 1000h - ensures <0.15mV drift over 1 year in energy metering calibration references. |
Pinout & Package
SOT-23-3 (DBZ) package: compact 2.92mm × 1.3mm surface-mount outline with gull-wing leads, rated for JEDEC Level-1 moisture sensitivity and 260°C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode | Reference output node | Connects to regulated voltage point; sinks all operating current; must be biased above anode by ≥1.225V. |
| Anode | Ground reference terminal | Common return path; ties to system ground or low-impedance analog ground plane. |
| NC (No Connect) | Unused internal node | Pin 3 is unconnected die bond pad; must be left floating or tied to anode per TI recommendation to avoid EMI coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable with any capacitive load - eliminates BOM cost and board space for output bypass, critical in space-constrained wearables. |
| Micropower start-up | 39μA minimum cathode current - enables reliable regulation from weak sources like thermopile sensors or harvested energy. |
| Low thermal hysteresis | 0.36mV/V over –40°C ↔ 125°C cycling - preserves calibration integrity in automotive cabin modules undergoing repeated thermal stress. |
| ESD robustness | ±2000V HBM rating - withstands handling in standard assembly environments without special precautions. |
| Wide temperature range | Specified from –40°C to +85°C - qualified for industrial control and outdoor metering applications. |
Applications
| Portable Data Acquisition | Industrial Power-Supply Monitor |
|---|---|
Use Scenario: Battery-powered handheld multimeter measuring DC voltage with 16-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 1.225V reference for ADC full-scale calibration and offset trimming. Use Value: ±0.1% initial accuracy and 20μVRMS noise enable ≤0.0015% measurement uncertainty without post-calibration software correction. | Use Scenario: PLC I/O module monitoring 24V DC supply rail for brownout detection. IC Role / Device Role / Timing Role: Serves as precision threshold reference for comparator-based undervoltage lockout circuit. Use Value: 50ppm/°C drift ensures trip point remains within ±0.5% over full industrial temperature range, eliminating false triggers. |
| Precision Audio Signal Chain | Battery Management System |
Use Scenario: Low-noise microphone preamplifier with DC-coupled gain stage requiring stable bias voltage. IC Role / Device Role / Timing Role: Supplies clean 1.225V common-mode voltage to op-amp input stage. Use Value: 20μVRMS noise floor prevents audible hiss in 110dB SNR audio paths; no output cap needed simplifies layout near sensitive analog nodes. | Use Scenario: Single-cell Li-ion fuel gauge IC requiring accurate reference for coulomb counting ADC. IC Role / Device Role / Timing Role: Delivers stable reference to integrated 12-bit delta-sigma ADC measuring cell voltage. Use Value: 120ppm long-term stability limits accumulated charge error to <0.01% over 12 months, improving state-of-charge accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3012AIDBZR | Fixed 1.2V output, ±0.2% initial accuracy, 50ppm/°C, 3.3μA quiescent current | Lower operating current but looser initial tolerance; not suitable for sub-0.1% calibration loops | Select when ultra-low power (<10μA) dominates over absolute accuracy; verify 1.2V vs 1.225V system margin. |
| ADR3412ARJZ-R7 | Fixed 1.2V output, ±0.1% initial accuracy, 30ppm/°C, 120μA quiescent current, SC70-5 package | Tighter tempco but higher minimum current; requires output capacitor for stability | Choose for enhanced thermal stability in extended temperature zones; accept added capacitor and higher bias current. |
Compared with REF3012AIDBZR and ADR3412ARJZ-R7, TL4051A12IDBZRG4 delivers superior initial accuracy at lower quiescent current while eliminating output capacitor requirements-making it optimal for cost-sensitive, space-constrained, high-accuracy shunt reference designs.
Availability
TL4051A12IDBZRG4 is available at Aetrix Electronics and suitable for portable instrumentation, industrial power-supply monitoring, and battery management systems requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for TL4051A12IDBZRG4 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 and broad industrial portfolio coverage.
The TL4051 product line was designed specifically for micropower, high-accuracy shunt reference applications in battery-operated and space-constrained systems where low drift, low noise, and capacitor-free operation are essential.
FAQ
What is the maximum cathode current rating for TL4051A12IDBZRG4?
The TL4051A12IDBZRG4 has a maximum continuous cathode current rating of 12mA, as specified in its Absolute Maximum Ratings table. Exceeding this value risks thermal overstress and long-term reliability degradation. Designers must size the external current-setting resistor to ensure worst-case conditions (maximum input voltage, minimum load current) keep IZ ≤12mA while maintaining ≥60μA minimum for regulation.
Does TL4051A12IDBZRG4 require an output capacitor for stability?
No, TL4051A12IDBZRG4 does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including direct connection to high-capacitance nodes like ADC reference inputs or op-amp feedback paths. Adding a capacitor may reduce high-frequency noise but is never necessary for loop stability.
What is the operating temperature range of TL4051A12IDBZRG4?
TL4051A12IDBZRG4 is characterized for operation from –40°C to +85°C ambient temperature. This industrial-grade range is confirmed in the "TL4051x12I Electrical Characteristics" section of the datasheet and applies to all A-grade variants in SOT-23-3 packaging, including TL4051A12IDBZRG4.
How does the pin configuration of TL4051A12IDBZRG4 differ from adjustable TL4051 variants?
TL4051A12IDBZRG4 uses a 3-pin SOT-23-3 (DBZ) package with Cathode, Anode, and NC terminals. Adjustable versions (e.g., TL4051AIDBZR) replace the NC pin with a Feedback (FB) pin for resistor-divider programming. The NC pin on TL4051A12IDBZRG4 must remain unconnected or tied to Anode per TI's EMI mitigation guidance-never used as FB.
What is the long-term stability specification for TL4051A12IDBZRG4?
TL4051A12IDBZRG4 exhibits 120ppm long-term stability after 1000 hours of operation at 25°C with 100μA cathode current. This parameter quantifies output voltage drift due to aging and is measured under controlled conditions; it supports high-reliability applications such as utility metering and medical diagnostics where calibration intervals exceed one year.
TL4051A12IDBZRG4 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):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±0.1%
- 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
TL4051A12IDBZRG4 FAQ
1.How can I place an order for TL4051A12IDBZRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4051A12IDBZRG4 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 TL4051A12IDBZRG4 reliable?
The price and inventory of TL4051A12IDBZRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4051A12IDBZRG4 is usually 5 days.
3.What payment methods are accepted for TL4051A12IDBZRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TL4051A12IDBZRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TL4051A12IDBZRG4?
TL4051A12IDBZRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4051A12IDBZRG4 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 TL4051A12IDBZRG4?
For technical support, including TL4051A12IDBZRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4051A12IDBZRG4 requirements.
6.How does Aetrix verify that TL4051A12IDBZRG4 is sourced from the original manufacturer or authorized distributors?
All TL4051A12IDBZRG4 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 TL4051A12IDBZRG4 meets industry standards.
7.What is the process for return or replacement of TL4051A12IDBZRG4?
All TL4051A12IDBZRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TL4051A12IDBZRG4, 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 TL4051A12IDBZRG4 part is unused and in its original packaging.
Return procedure for TL4051A12IDBZRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4051A12IDBZRG4 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
