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Texas Instruments LM4050CIM3-4.1
- Part No.:
- LM4050CIM3-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3-4.1.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,595
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Product details
Overview
LM4050CIM3-4.1 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a nominal 4.096 V reverse breakdown voltage with ±21 mV (±0.5%) initial tolerance at 25°C, 73 μA minimum operating current, and 50 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4050CIM3-4.1 datasheet, LM4050CIM3-4.1 pinout, LM4050CIM3-4.1 application, or LM4050CIM3-4.1 equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), no-output-capacitor operation, capacitive load tolerance, low 93 μVrms wideband noise (10 Hz–10 kHz), and 0.5 Ω dynamic impedance at 1 mA.
Technical Context
The LM4050CIM3-4.1 operates as a two-terminal shunt reference, sinking current through its cathode to maintain a stable 4.096 V across external loads. Its bandgap-derived Zener-zap trimmed structure provides curvature-corrected temperature stability and eliminates need for output capacitance.
It achieves ±0.5% initial accuracy (Grade C) via wafer-sort fuse trimming, supports 73–15,000 μA operating current range, and maintains <1.2 mV reverse voltage change over full industrial temperature range - enabling use in battery-powered data loggers and precision analog front-ends without thermal recalibration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - sets precise bias point for 12-bit ADCs and ratiometric sensor bridges. |
| Initial Tolerance | ±21 mV (±0.5%) at 25°C - Grade C specification enabling cost-optimized precision without post-calibration. |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +85°C - ensures ≤±3.3 mV total drift across industrial range, critical for unattended field sensors. |
| Min Operating Current | 73 μA at TA = −40°C to +85°C - enables ultra-low-power operation in energy-harvesting systems. |
| Dynamic Impedance | 0.5 Ω at 1 mA, 120 Hz - minimizes load-induced voltage sag during fast-sampling ADC conversions. |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - meets SNR requirements for 16-bit SAR ADC references without filtering. |
| Long-Term Stability | 120 ppm (1000 hrs @ 25°C) - supports >5-year calibration intervals in test equipment and medical monitors. |
Pinout & Package
SOT-23 (DBZ) package: 2.92 mm × 1.30 mm body, 3-pin surface-mount, JEDEC MO-178AA compliant. Cathode (Pin 1) carries shunt current; Anode (Pin 2) connects to system ground; Pin 3 is NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Current-sinking terminal | Accepts input current and regulates voltage drop to maintain 4.096 V across external load - requires series resistor for biasing. |
| Anode (Pin 2) | Reference ground node | Must be connected directly to system ground plane; serves as voltage reference return and thermal path. |
| NC (Pin 3) | No internal connection | Left floating per datasheet; no PCB trace or solder mask relief required - avoids unintended parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - reduces BOM count and board space in space-constrained wearables. |
| Tolerates capacitive loads | Remains stable with ≥100 nF load capacitance - simplifies interface to switched-capacitor filters and sample-hold circuits. |
| Fixed 4.096 V output | Matches common 12-bit full-scale ADC reference (212 = 4096) - eliminates scaling error in digital multimeters and data acquisition modules. |
| Industrial temp range | Specified from −40°C to +85°C - qualified for deployment in factory automation controllers and outdoor environmental sensors. |
| Low quiescent current | 73 μA min operating current - enables >1-year battery life in coin-cell–powered IoT edge nodes with 10-second wake-up intervals. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation for precision resistive divider and ADC reference input. Use Value: Enables ±0.1% measurement accuracy across −10°C to +50°C ambient without calibration drift compensation. |
Use Scenario: 8-channel industrial DAQ module sampling thermocouples and RTDs at 1 kSPS. IC Role / Device Role / Timing Role: Common reference source for multiplexed analog signal chain, including PGA, anti-alias filter, and SAR ADC. Use Value: Maintains channel-to-channel gain matching within 0.05% over temperature due to low thermal hysteresis (1.148 mV). |
| Energy Management | Precision Audio Components |
Use Scenario: Smart electricity meter with isolated current sensing and metrology SoC. IC Role / Device Role / Timing Role: Reference for shunt-based current measurement amplifier and voltage scaling network. Use Value: Supports Class 0.2 accuracy compliance with <±20 ppm/°C tempco and 120 ppm long-term stability. |
Use Scenario: High-fidelity audio DAC evaluation board requiring ultra-low-noise analog supply. IC Role / Device Role / Timing Role: Low-noise voltage reference for DAC internal bias generation and analog output stage. Use Value: Contributes only 93 μVrms noise floor - preserves >105 dB SNR in 24-bit audio playback paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C41IDBZR | Same 4.096 V output, ±0.5% tolerance, SOT-23 package, but higher 100 μA min operating current and 120 μVrms noise. | Less suitable for sub-100 μA battery systems; acceptable where layout allows minor noise margin. | Select when TI second-source assurance is required and higher noise is acceptable. |
| ADR3440ARJZ-R7 | Series reference (not shunt), 4.096 V, ±0.1% A-grade, 350 μA quiescent current, SOIC-8 package. | Requires input voltage ≥4.4 V; incompatible with low-voltage or high-side sensing topologies. | Choose only if system has ≥4.5 V rail and needs tighter initial accuracy - not a drop-in replacement. |
Compared with TL4050C41IDBZR, LM4050CIM3-4.1 offers lower operating current and noise; compared with ADR3440ARJZ-R7, it enables simpler two-terminal biasing and works down to 4.1 V supply, but lacks series-reference headroom and grade-A tolerance.
Availability
LM4050CIM3-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LM4050CIM3-4.1 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 founded in 1930, specializing in analog ICs, embedded processors, and high-reliability components for industrial, automotive, and consumer markets.
The LM4050-N product line delivers precision shunt references optimized for space-constrained, low-power systems - designed specifically for instrumentation, sensor interfaces, and portable test equipment demanding stable voltage without external capacitors.
FAQ
What is the maximum operating current for LM4050CIM3-4.1?
The LM4050CIM3-4.1 supports up to 15 mA of reverse current. This upper limit ensures safe power dissipation within the SOT-23 package's 280 mW rating at 25°C ambient. Exceeding 15 mA risks thermal runaway or permanent degradation, especially above 85°C ambient. Always verify power derating using RθJA = 287°C/W when designing for elevated temperatures.
Does LM4050CIM3-4.1 require an external capacitor for stability?
No, the LM4050CIM3-4.1 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to ADC reference inputs or op-amp feedback networks. This eliminates capacitor-related aging, leakage, and board-space penalties - a key advantage over older shunt references like TL431.
What is the thermal hysteresis specification for LM4050CIM3-4.1?
The LM4050CIM3-4.1 exhibits 1.148 mV thermal hysteresis over −40°C to +125°C cycling, measured as the voltage difference at 25°C before and after extreme-temperature exposure. This low hysteresis supports repeatable measurements in field-deployed sensors and test equipment that undergo ambient temperature swings without recalibration.
Can LM4050CIM3-4.1 be used in automotive applications?
The standard LM4050CIM3-4.1 is rated for industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, TI offers the LM4050CIM3-4.1-Q1 variant (same electrical specs, automotive flow). Using the non-Q1 part in automotive environments may violate functional safety requirements and void warranty - always select the -Q1 suffix for under-hood or infotainment systems.
How does the LM4050CIM3-4.1 achieve its 4.096 V output voltage?
The LM4050CIM3-4.1 achieves its precise 4.096 V output via Zener-zap trimming during wafer sort, combined with bandgap reference temperature drift curvature correction. The 4.096 V value is intentionally selected to align with 212, enabling exact full-scale mapping in 12-bit data converters - eliminating scaling errors in digital multimeters and PLC analog inputs.
LM4050CIM3-4.1 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:
- Obsolete
- 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
LM4050CIM3-4.1 FAQ
1.How can I place an order for LM4050CIM3-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3-4.1 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 LM4050CIM3-4.1 reliable?
The price and inventory of LM4050CIM3-4.1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIM3-4.1 is usually 5 days.
3.What payment methods are accepted for LM4050CIM3-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3-4.1?
LM4050CIM3-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3-4.1 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 LM4050CIM3-4.1?
For technical support, including LM4050CIM3-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3-4.1 requirements.
6.How does Aetrix verify that LM4050CIM3-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3-4.1 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 LM4050CIM3-4.1 meets industry standards.
7.What is the process for return or replacement of LM4050CIM3-4.1?
All LM4050CIM3-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3-4.1, 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 LM4050CIM3-4.1 part is unused and in its original packaging.
Return procedure for LM4050CIM3-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIM3-4.1 Tags
-
TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
Texas Instruments
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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