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Texas Instruments TL4050B41QDBZR
- Part No.:
- TL4050B41QDBZR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050B41QDBZR.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,257
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Product details
Overview
TL4050B41QDBZR from Texas Instruments is a precision micropower shunt voltage reference with 4.096V nominal output, ±0.2% initial tolerance (B grade), 50ppm/°C max temperature coefficient, 93μVRMS wideband noise, and operation across –40°C to 125°C. It serves as a stable, low-noise reference in high-resolution ADC/DAC circuits, battery-powered instrumentation, and automotive power-supply monitors.
For engineers reviewing the TL4050B41QDBZR datasheet, TL4050B41QDBZR pinout, TL4050B41QDBZR application, or TL4050B41QDBZR equivalent, this page delivers verified electrical characteristics, SOT-23-3 terminal mapping, thermal hysteresis (1.148mV), dynamic impedance (0.5Ω), and minimum cathode current (68μA typical) - all validated for extended-temperature industrial and automotive use cases.
Technical Context
The TL4050B41QDBZR operates as a two-terminal shunt reference requiring no external capacitor for stability and supporting capacitive loads up to 100nF. Its bandgap-based core delivers fixed 4.096V reverse breakdown voltage with tight regulation over cathode current (68μA to 15mA) and full temperature range.
It features low dynamic impedance (0.5Ω at 1mA/120Hz), low thermal hysteresis (1.148mV), and long-term stability of 120ppm after 1000 hours - enabling reliable performance in precision data acquisition and closed-loop power monitoring where drift and noise directly impact measurement fidelity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal at 100μA cathode current - enables exact 1mV LSB in 12-bit systems with 5V supply. |
| Initial Tolerance | ±0.2% max (B grade) at 25°C - supports mid-tier precision without A-grade cost premium. |
| Temp Coefficient | ±50ppm/°C max over –40°C to 125°C - ensures ≤±0.5% total drift across full automotive operating range. |
| Noise (10Hz–10kHz) | 93μVRMS - low enough to avoid degrading ENOB in 14-bit+ SAR ADCs. |
| Min Cathode Current | 68μA typical (78μA max over temp) - allows ultra-low-power operation in battery-backed sensors. |
| Dynamic Impedance | 0.5Ω at 1mA - maintains output regulation under fast load transients in switching power monitor circuits. |
| Thermal Hysteresis | 1.148mV - quantifies reversible VZ shift after thermal cycling; critical for repeatable calibration in test equipment. |
Pinout & Package
SOT-23-3 package (DBZ) with 1.3mm × 2.9mm footprint, 1.45mm height, and moisture sensitivity level 1 - suitable for automated assembly and space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Reference ground return path | Must connect to system ground; parasitic Schottky diode to Pin 2 requires Pin 3 to float or tie to Pin 2. |
| Cathode (Pin 2) | Output voltage node | Delivers regulated 4.096V; sinks total current (load + reference bias); connects to RS resistor from supply rail. |
| NC / Test (Pin 3) | No-connect / factory test terminal | Internally unused in production; TI recommends leaving floating or tying to Pin 2 per layout guidance. |
Key Features
| Feature | Design Value |
|---|---|
| Stable with all capacitive loads | Eliminates need for output bypass capacitor - reduces BOM count and layout area in portable designs. |
| Extended temperature range | –40°C to 125°C operation certified - qualified for under-hood automotive and industrial control applications. |
| Low micropower consumption | 68μA typical minimum cathode current - extends battery life in wireless sensor nodes and handheld meters. |
| Low wideband noise | 93μVRMS (10Hz–10kHz) - preserves signal integrity in audio DACs and high-fidelity process transmitters. |
| Low thermal hysteresis | 1.148mV - minimizes recalibration frequency in lab-grade instrumentation and metrology equipment. |
Applications
| Data-Acquisition Systems | Automotive Power-Supply Monitors |
|---|---|
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) sampling analog sensor outputs in battery-powered field instruments. IC Role / Device Role / Timing Role: Provides precise 4.096V reference enabling 1mV LSB resolution with 5V digital supply. Use Value: Eliminates need for trimming; maintains accuracy across temperature swings during outdoor deployment. |
Use Scenario: Real-time monitoring of 12V battery voltage and alternator output in engine control units. IC Role / Device Role / Timing Role: Shunt reference for MCU ADC input channel measuring scaled battery rail. Use Value: Stable 4.096V reference ensures ±1% voltage reading accuracy over –40°C to 125°C ambient. |
| Portable Instrumentation | Energy Management Systems |
Use Scenario: Handheld multimeter with auto-ranging and true-RMS conversion. IC Role / Device Role / Timing Role: Reference for dual-slope or sigma-delta ADC front-end measuring mV–1000V ranges. Use Value: Low 93μVRMS noise prevents digitization errors in microvolt-level measurements. |
Use Scenario: Smart circuit breaker monitoring current/voltage in residential solar inverters. IC Role / Device Role / Timing Role: Precision reference for isolated ADC measuring DC-link voltage and grid phase. Use Value: ±0.2% tolerance and 50ppm/°C TC ensure revenue-grade energy metering compliance (IEC 62053). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050A41QDBZR | ±0.1% initial tolerance vs. ±0.2%; identical 4.096V output, noise, and temp range | Required where 12-bit+ systems demand tighter initial accuracy without calibration | Select when absolute initial error budget is <±2mV; higher cost than TL4050B41QDBZR |
| REF3040AIDBZR | 4.096V series reference; 50ppm/°C TC, 25μVRMS noise, 50μA quiescent current; requires output capacitor | Better noise performance but needs external 1μF capacitor; not a drop-in replacement due to 3-pin series topology | Choose for ultra-low-noise applications where board space allows capacitor and layout supports series-reference topology |
Compared with TL4050A41QDBZR, the TL4050B41QDBZR trades 0.1% initial accuracy for lower cost while retaining identical thermal stability and noise; versus REF3040AIDBZR, it offers simpler two-terminal shunt operation but with higher noise - making TL4050B41QDBZR optimal for cost-sensitive, space-constrained shunt-reference designs.
Availability
TL4050B41QDBZR is available at Aetrix Electronics and suitable for data-acquisition systems, automotive power-supply monitors, and portable instrumentation requiring stable component supply across extended temperature ranges.
Supply support for TL4050B41QDBZR 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 automotive-grade components.
The TL4050 series belongs to TI's precision voltage reference product line, engineered for high-accuracy, low-drift, and low-noise performance in measurement, control, and power-monitoring applications demanding reliability across harsh environments.
FAQ
What is the output voltage tolerance of TL4050B41QDBZR over its full operating temperature range?
The TL4050B41QDBZR has a maximum reverse breakdown voltage tolerance of ±29mV over the full –40°C to 125°C range, corresponding to ±0.71% of its 4.096V nominal output. This value is specified in Section 5.7 of the datasheet under "ΔVZ Full range" for TL4050B41Q, confirming guaranteed performance without calibration in automotive and industrial settings.
Does TL4050B41QDBZR require an external output capacitor for stability?
No, TL4050B41QDBZR does not require an external output capacitor. As a two-terminal shunt reference, it is inherently stable with all capacitive loads - including direct connection to ADC input capacitors or long PCB traces - eliminating the need for a bypass capacitor and simplifying layout in space-constrained designs.
What is the minimum cathode current required for TL4050B41QDBZR to maintain regulation?
The TL4050B41QDBZR requires a minimum cathode current of 68μA typical at 25°C, rising to 78μA maximum across –40°C to 125°C. This value is explicitly listed in Table 5.7 under "IZ,min Full range", ensuring reliable regulation even in ultra-low-power battery-operated systems.
How does the noise performance of TL4050B41QDBZR compare to other 4.096V references?
TL4050B41QDBZR delivers 93μVRMS wideband noise (10Hz–10kHz), which is higher than series references like REF3040AIDBZR (25μVRMS) but optimized for shunt topology trade-offs. Its noise is fully characterized and sufficient for 12-bit systems; for 16-bit+ applications, designers may pair it with external RC filtering per Figure 8-4 in the datasheet.
Can TL4050B41QDBZR be used in automotive under-hood applications?
Yes, TL4050B41QDBZR is qualified for operation from –40°C to 125°C and carries the "Q" temperature grade designation, making it suitable for under-hood automotive applications such as engine control unit voltage monitoring, battery management sensing, and ADAS power-rail supervision where extended temperature reliability is mandatory.
TL4050B41QDBZR 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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 78 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050B41QDBZR FAQ
1.How can I place an order for TL4050B41QDBZR through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050B41QDBZR 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 TL4050B41QDBZR reliable?
The price and inventory of TL4050B41QDBZR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050B41QDBZR is usually 5 days.
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Once your TL4050B41QDBZR 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 TL4050B41QDBZR?
For technical support, including TL4050B41QDBZR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050B41QDBZR requirements.
6.How does Aetrix verify that TL4050B41QDBZR is sourced from the original manufacturer or authorized distributors?
All TL4050B41QDBZR 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 TL4050B41QDBZR meets industry standards.
7.What is the process for return or replacement of TL4050B41QDBZR?
All TL4050B41QDBZR units undergo pre-shipment inspection (PSI). If there is an issue with TL4050B41QDBZR, 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 TL4050B41QDBZR part is unused and in its original packaging.
Return procedure for TL4050B41QDBZR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050B41QDBZR Tags
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TL431AIDBZR
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TL431BQDBZR
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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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