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Texas Instruments TL4050C41IDBZT
- Part No.:
- TL4050C41IDBZT
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
TL4050C41IDBZT.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:737
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Product details
Overview
TL4050C41IDBZT from Texas Instruments is a precision micropower shunt voltage reference delivering a stable 4.096V output with ±21mV (±0.5%) initial tolerance at 25°C, 50ppm/°C temperature coefficient, 93μVRMS wideband noise, and operation across –40°C to 85°C. It serves as the voltage reference in 12-bit data-acquisition systems, enabling 1mV LSB resolution with 5V-supplied ADCs like the ADS7842.
For engineers reviewing the TL4050C41IDBZT datasheet, TL4050C41IDBZT pinout, TL4050C41IDBZT application, or TL4050C41IDBZT equivalent, this page provides verified electrical specifications, SOT-23-3 terminal mapping, low-noise design implications for precision measurement, and validated alternative options for industrial and battery-powered systems requiring stable 4.096V references.
Technical Context
The TL4050C41IDBZT operates as a two-terminal shunt reference, sinking cathode current (IZ) between 52μA min and 15mA max to maintain regulation. Its internal bandgap core achieves tight initial accuracy and low thermal drift without external compensation components.
It exhibits 0.5Ω typical reverse dynamic impedance at 1mA, stable performance with any capacitive load (no output capacitor required), and thermal hysteresis of 1.148mV over –40°C to 125°C cycling - critical for repeatable measurements in field-deployed instrumentation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal at IZ = 100μA, 25°C - precisely matches 12-bit ADC full-scale range for 1mV LSB with 5V supply. |
| Initial Tolerance | ±21mV (±0.5%) at 25°C - C-grade accuracy suitable for cost-sensitive industrial monitoring where <0.1% is not required. |
| Temp Coefficient | ±50ppm/°C over –40°C to 85°C - contributes ≤±0.42mV drift across full operating range, supporting <12-bit stability. |
| Output Noise | 93μVRMS (10Hz–10kHz) at IZ = 100μA - limits effective resolution to ~13.5 bits; requires low-noise layout for high-fidelity sensing. |
| Min Cathode Current | 52μA typical at 25°C - enables ultra-low-power operation in battery-backed sensors and portable test equipment. |
| Dynamic Impedance | 0.5Ω typical at 1mA, 120Hz - ensures minimal output voltage shift under varying load transients in power-supply monitor circuits. |
| Operating Temp | –40°C to +85°C - qualified for industrial control cabinets and automotive cabin electronics (non-engine bay). |
Pinout & Package
SOT-23-3 package (DBZ): ultra-compact 2.92mm × 1.3mm surface-mount footprint with 0.95mm pitch; thermally optimized for PCB copper pour attachment on cathode pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Reference output node | Connected to load and bias resistor; sinks all operating current; must be routed with low-inductance trace for noise-sensitive applications. |
| Anode (Pin 2) | Ground reference | Low-impedance return path; ties directly to system AGND; shared with cathode current return in shunt configuration. |
| NC / Floating (Pin 3) | No-connect terminal | Internally unconnected; must remain floating or tied to Pin 2 per TI recommendation to avoid parasitic Schottky conduction. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Eliminates BOM cost and board space for external bypass caps while maintaining phase margin across all load capacitances. |
| Micropower operation | 52μA minimum cathode current enables >10-year battery life in wireless sensor nodes using coin-cell sources. |
| Wide current range | Operates from 52μA to 15mA - supports both ultra-low-power sleep modes and high-speed ADC burst sampling without re-biasing. |
| Robust ESD rating | ±2000V HBM - withstands handling in standard manufacturing environments without additional protection circuitry. |
| Thermal hysteresis control | 1.148mV max after –40°C/125°C cycling - ensures repeatability in process control loops subject to ambient cycling. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: 12-bit SAR ADC (e.g., ADS7842) digitizing 0–4.096V sensor outputs in portable test equipment. IC Role / Device Role / Timing Role: Precision voltage reference establishing full-scale input range and LSB definition. Use Value: Enables exact 1mV quantization step with 5V digital supply; eliminates gain calibration in production test. |
Use Scenario: Monitoring 5V/12V rail integrity in PLC backplanes with microcontroller ADC. IC Role / Device Role / Timing Role: Stable reference for ratiometric comparison against scaled-down rail voltage. Use Value: Delivers ±0.5% absolute accuracy over temperature, reducing false undervoltage alarms in industrial environments. |
| Instrumentation & Test Equipment | Battery-Powered Equipment |
Use Scenario: Handheld multimeter front-end requiring stable reference for autoranging DCV measurements. IC Role / Device Role / Timing Role: Primary reference source for dual-slope or sigma-delta converter integration cycles. Use Value: 93μVRMS noise and 50ppm/°C drift meet Class II handheld meter accuracy requirements per IEC 61010. |
Use Scenario: Gas detector with electrochemical sensor and low-power MCU in AA-battery enclosure. IC Role / Device Role / Timing Role: Reference for sensor signal conditioning amplifier and ADC during periodic wake-up sampling. Use Value: 52μA min operating current extends battery life beyond 5 years while maintaining ±0.5% reading fidelity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF3040AIDBZR | 4.096V, ±0.2% (A-grade), 50ppm/°C, 50μVRMS noise, SOT-23-3, 50μA min IQ | Lower noise and tighter tolerance; requires external 100nF bypass cap for stability | Preferred when 13+ bit effective resolution is required and board space allows decoupling cap. |
| LM4040C41IDBZR | 4.096V, ±0.5%, 100ppm/°C, 75μVRMS, SOT-23-3, 60μA min IZ | Higher tempco and slightly higher noise; wider supply headroom tolerance (up to 36V) | Selected for legacy designs where 100ppm/°C drift is acceptable and higher input voltage margin is needed. |
Compared with TL4050C41IDBZT, REF3040AIDBZR offers superior noise and accuracy at higher cost and added capacitor dependency, while LM4040C41IDBZR trades drift and noise for broader input voltage capability and established second-source availability.
Availability
TL4050C41IDBZT is available at Aetrix Electronics and suitable for data-acquisition systems, industrial power-supply monitors, and portable instrumentation requiring stable component supply with guaranteed long-term sourcing.
Supply support for TL4050C41IDBZT 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, embedded processing, and connectivity technologies, with decades of expertise in precision reference design.
The TL4050 series targets cost-optimized, micropower shunt references for industrial, automotive, and portable applications - balancing accuracy, stability, and ease of use in space-constrained layouts.
FAQ
What is the minimum cathode current required for TL4050C41IDBZT to regulate properly?
The TL4050C41IDBZT requires a minimum cathode current of 52μA at 25°C (73μA over full –40°C to 85°C range) to maintain regulation within specification. Below this threshold, output voltage deviates nonlinearly and temperature coefficient degrades. Designers must size the series bias resistor (RS) to ensure this current is met even at lowest input voltage and maximum load current.
Does TL4050C41IDBZT require an output capacitor for stability?
No, TL4050C41IDBZT is internally compensated and stable with all capacitive loads - including 0μF. Unlike many shunt references, it does not require an external output capacitor. Adding one (e.g., 100nF) may reduce high-frequency noise but is never necessary for loop stability in any application.
How does the 4.096V output of TL4050C41IDBZT benefit 12-bit ADC systems?
The 4.096V output of TL4050C41IDBZT yields exactly 1mV per LSB when used with a 12-bit ADC powered by a clean 5V supply (4096 codes × 1mV = 4.096V). This eliminates fractional LSB errors and simplifies firmware scaling, making TL4050C41IDBZT ideal for precision data loggers and sensor transmitters where integer-mV resolution is specified.
What is the thermal hysteresis specification for TL4050C41IDBZT, and why does it matter?
TL4050C41IDBZT has a thermal hysteresis of 1.148mV maximum - defined as the voltage difference at 25°C before and after cycling between –40°C and 125°C. This parameter directly impacts repeatability in field instruments subjected to ambient temperature swings; low hysteresis ensures consistent calibration across operational cycles without recalibration.
Can TL4050C41IDBZT be used in automotive under-hood applications?
No, TL4050C41IDBZT is rated for –40°C to +85°C (industrial grade), not the extended –40°C to +125°C required for under-hood automotive use. For such environments, the Q-grade variant TL4050C41QDBZT is specified - identical electrical performance but qualified across the full automotive temperature range.
TL4050C41IDBZT 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:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 93µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
TL4050C41IDBZT FAQ
1.How can I place an order for TL4050C41IDBZT through Aetrix?
Please submit a Request for Quotation (RFQ) for TL4050C41IDBZT 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 TL4050C41IDBZT reliable?
The price and inventory of TL4050C41IDBZT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TL4050C41IDBZT is usually 5 days.
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TL4050C41IDBZT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TL4050C41IDBZT 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 TL4050C41IDBZT?
For technical support, including TL4050C41IDBZT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TL4050C41IDBZT requirements.
6.How does Aetrix verify that TL4050C41IDBZT is sourced from the original manufacturer or authorized distributors?
All TL4050C41IDBZT 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 TL4050C41IDBZT meets industry standards.
7.What is the process for return or replacement of TL4050C41IDBZT?
All TL4050C41IDBZT units undergo pre-shipment inspection (PSI). If there is an issue with TL4050C41IDBZT, 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 TL4050C41IDBZT part is unused and in its original packaging.
Return procedure for TL4050C41IDBZT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TL4050C41IDBZT Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
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LM4040EIM3-2.5/NOPB
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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