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Texas Instruments LM4050CIM3X-5.0
- Part No.:
- LM4050CIM3X-5.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3X-5.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,132
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Product details
Overview
LM4050CIM3X-5.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 5.0 V reverse breakdown voltage with ±0.5% initial tolerance (C-grade), 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 56 μA to 15 mA supply current and supports industrial (−40°C to +85°C) and extended (−40°C to +125°C) temperature ranges - ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4050CIM3X-5.0 datasheet, LM4050CIM3X-5.0 pinout, LM4050CIM3X-5.0 application, or LM4050CIM3X-5.0 equivalent, key selection criteria include its no-output-capacitor-required operation, capacitive-load tolerance, low dynamic impedance (0.5 Ω at 1 mA), thermal hysteresis of 1.4 mV, and compatibility with space-constrained battery-powered systems requiring long-term stability (120 ppm drift over 1000 hrs).
Technical Context
The LM4050CIM3X-5.0 uses bandgap-based Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation. Its internal structure eliminates need for external stabilization capacitors while maintaining stability across capacitive loads up to 10 nF.
It functions as a two-terminal programmable current sink: cathode accepts input current and regulates voltage across anode-to-cathode terminals. Reverse dynamic impedance remains ≤0.5 Ω across 1–15 mA operating range, enabling precise load regulation (≤12 mV change) and low-noise performance critical for 16-bit+ data acquisition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V nominal reverse breakdown voltage at 100 μA test current |
| Initial Tolerance | ±0.5% at 25°C (C-grade), translating to ±25 mV absolute error |
| Temp Coefficient | ≤50 ppm/°C over −40°C to +125°C, limiting drift to ±6.5 mV across full range |
| Operating Current | 56 μA min to 15 mA max - enables ultra-low-power sensor biasing and high-current reference buffering |
| Output Noise | 93 μVrms (10 Hz–10 kHz), suitable for 16-bit SAR ADC reference without additional filtering |
| Dynamic Impedance | 0.5 Ω at 1 mA, ensuring <1 mV load regulation shift per 1 mA output current change |
| Long-Term Stability | 120 ppm over 1000 hours, supporting calibration-critical metrology applications |
Pinout & Package
SOT-23 (DBZ) package, 3-pin surface-mount, body size 2.92 mm × 1.30 mm. Pin 1: Cathode (shunt current path and voltage regulation node); Pin 2: Anode (common ground connection); Pin 3: NC (no internal connection, must be left floating or tied to Pin 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input & voltage sensing node | Accepts total current (IR = IQ + IL) and establishes regulated 5.0 V across anode–cathode; requires series resistor for current limiting |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; serves as return path for shunt current and defines output voltage reference point |
| NC (Pin 3) | No internal connection | Electrically isolated; floating or tied to Pin 2 per layout best practice to minimize parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation without external bypass capacitor - reduces BOM count and PCB area in compact designs |
| Tolerates capacitive loads | Remains stable with up to 10 nF load capacitance, enabling direct interface with ADC input capacitors |
| Fixed 5.0 V breakdown voltage | Eliminates external resistor network needed for adjustable references - simplifies layout and improves accuracy |
| Low quiescent current | 56 μA minimum operating current enables multi-year battery life in always-on sensor nodes |
| Industrial & extended temp range | Rated for −40°C to +125°C operation - supports automotive under-hood and industrial process control environments |
Applications
| Portable Data Loggers | Industrial PLC Analog Inputs |
|---|---|
Use Scenario: Battery-powered environmental sensor node recording temperature, humidity, and pressure at 10-second intervals. IC Role / Device Role / Timing Role: Shunt reference providing stable 5.0 V bias for 16-bit sigma-delta ADC and op-amp signal conditioning stages. Use Value: Enables ±0.01% measurement accuracy over −20°C to +70°C ambient with no recalibration, leveraging 50 ppm/°C tempco and 120 ppm long-term stability. |
Use Scenario: Modular analog input card in a DIN-rail mounted programmable logic controller handling 4–20 mA loop-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference for ratiometric DAC output scaling and ADC reference in isolated analog front-end. Use Value: Maintains <±0.1% full-scale error across −40°C to +85°C operating range, meeting IEC 61000-6-2 immunity requirements without derating. |
| Precision Audio DAC Biasing | Automotive Body Control Module Sensors |
Use Scenario: High-fidelity audio codec board using dual 24-bit DACs requiring ultra-low-noise analog supply rails. IC Role / Device Role / Timing Role: Low-noise 5.0 V reference for DAC internal bias generation and analog output stage calibration. Use Value: 93 μVrms noise floor ensures >105 dB SNR in audio band, avoiding audible artifacts during quiet passages. |
Use Scenario: Cabin temperature and seat occupancy detection using thermistors and capacitive sensors in AEC-Q100-compliant BCM. IC Role / Device Role / Timing Role: Stable reference for microcontroller ADC sampling of sensor bridge outputs and LDO feedback dividers. Use Value: Supports AEC-Q100 Grade 1 qualification via LM4050CIM3X-5.0-Q1 variant; C-grade tolerance allows cost-optimized non-safety subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C50IDBZR | Same 5.0 V, ±0.5% tolerance, SOT-23 package; lower max operating current (10 mA vs 15 mA) and higher noise (120 μVrms) | Less suitable for high-current reference buffers or low-noise 16-bit+ ADCs | Preferred where TI second-source assurance is required and 15 mA headroom is unnecessary |
| MAX6008BEUR+T | 5.0 V, ±0.2% (B-grade), 75 ppm/°C, SOT-23; requires 1 μF output capacitor for stability | Not drop-in compatible due to capacitor requirement and tighter tolerance - demands layout revision | Chosen when tighter initial accuracy outweighs added capacitor and footprint overhead |
Compared with TL4050C50IDBZR and MAX6008BEUR+T, the LM4050CIM3X-5.0 offers superior noise performance and higher current capability without external capacitance, making it optimal for space-constrained, high-precision, capacitor-free designs - especially where long-term stability and thermal hysteresis (1.4 mV) are critical.
Availability
LM4050CIM3X-5.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial PLC analog inputs, and precision audio DAC biasing requiring stable component supply across production lifecycles.
Supply support for LM4050CIM3X-5.0 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 decades of expertise in precision reference design and high-volume manufacturing.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems - emphasizing zero-capacitor operation, wide current range, and robust thermal performance.
FAQ
What is the minimum operating current for LM4050CIM3X-5.0?
The LM4050CIM3X-5.0 requires a minimum operating current of 56 μA at 25°C to maintain regulation within specification. This value increases to 80 μA over the industrial temperature range (−40°C to +85°C) and 90 μA over the extended range (−40°C to +125°C), as confirmed in Section 6.8 of the SNOS455G datasheet. Below this threshold, the device may not sustain stable 5.0 V output.
Does LM4050CIM3X-5.0 require an external output capacitor?
No, the LM4050CIM3X-5.0 does not require an external output capacitor for stability - a core design feature enabled by internal compensation. It remains stable with any capacitive load up to 10 nF, unlike many competing shunt references that mandate ≥1 μF bypass capacitors. This eliminates associated ESR sensitivity and saves PCB area in compact layouts.
What is the thermal hysteresis specification for LM4050CIM3X-5.0?
The LM4050CIM3X-5.0 exhibits 1.4 mV thermal hysteresis over the −40°C to +125°C cycle, defined as the voltage difference measured at 25°C after exposure to −40°C versus after exposure to +125°C. This parameter directly impacts repeatability in systems undergoing repeated thermal cycling, such as automotive cabin sensors or outdoor industrial monitors.
How does the LM4050CIM3X-5.0 compare to the A-grade version in terms of accuracy?
The LM4050CIM3X-5.0 has ±0.5% initial tolerance at 25°C (C-grade), versus ±0.1% for the A-grade LM4050AIM3X-5.0. Over the industrial temperature range, C-grade adds ±50 ppm/°C drift, resulting in ±0.825% total tolerance (±41.25 mV), while A-grade achieves ±0.425% (±21.25 mV). The C-grade trades accuracy for cost efficiency in non-critical biasing roles.
Is LM4050CIM3X-5.0 qualified for automotive applications?
The standard LM4050CIM3X-5.0 is not AEC-Q100 qualified; however, the pin-compatible LM4050CIM3X-5.0-Q1 variant is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and manufactured on TI's automotive flow. For automotive body control or infotainment subsystems requiring automotive qualification, the -Q1 suffix version must be specified - the base part is intended for industrial and commercial use.
LM4050CIM3X-5.0 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):
- 5V
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CIM3X-5.0 FAQ
1.How can I place an order for LM4050CIM3X-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3X-5.0 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 LM4050CIM3X-5.0 reliable?
The price and inventory of LM4050CIM3X-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIM3X-5.0 is usually 5 days.
3.What payment methods are accepted for LM4050CIM3X-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3X-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3X-5.0?
LM4050CIM3X-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3X-5.0 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 LM4050CIM3X-5.0?
For technical support, including LM4050CIM3X-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3X-5.0 requirements.
6.How does Aetrix verify that LM4050CIM3X-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3X-5.0 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 LM4050CIM3X-5.0 meets industry standards.
7.What is the process for return or replacement of LM4050CIM3X-5.0?
All LM4050CIM3X-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3X-5.0, 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 LM4050CIM3X-5.0 part is unused and in its original packaging.
Return procedure for LM4050CIM3X-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIM3X-5.0 Tags
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