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Texas Instruments LM4050CIM3X-4.1
- Part No.:
- LM4050CIM3X-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3X-4.1.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,063
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Product details
Overview
LM4050CIM3X-4.1 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 4.096 V reverse breakdown voltage with ±21 mV (±0.5%) initial tolerance at 25°C, 50 ppm/°C max temperature coefficient, and 93 μVrms wideband noise (10 Hz–10 kHz). It operates from 73 μA to 15 mA, enabling use in low-power data acquisition and portable instrumentation.
For engineers reviewing the LM4050CIM3X-4.1 datasheet, LM4050CIM3X-4.1 pinout, LM4050CIM3X-4.1 application, or LM4050CIM3X-4.1 equivalent, key selection criteria include its C-grade accuracy, industrial/extended temperature support (−40°C to 125°C), no-output-capacitor requirement, capacitive load tolerance, and SOT-23 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4050CIM3X-4.1 uses bandgap-based Zener-zap trimmed shunt architecture with curvature-corrected temperature drift compensation. Its dynamic impedance remains ≤0.5 Ω at 1 mA, ensuring minimal output voltage shift under varying load current (ΔVR/ΔIR ≤ 7 mV from 1–15 mA at 25°C).
It achieves long-term stability of 120 ppm after 1000 hours and thermal hysteresis of 1.148 mV across −40°C to 125°C cycling. The device requires no external capacitor and tolerates arbitrary capacitive loads, simplifying layout while maintaining stability across its full operating current range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage at 100 μA test current |
| Initial Tolerance | ±21 mV (±0.5%) at 25°C - defines C-grade accuracy for cost-sensitive precision references |
| Temp Coefficient | ≤50 ppm/°C over −40°C to 125°C - ensures < ±2.1 mV drift across full industrial/extended range |
| Min Operating Current | 73 μA at TMAX - enables ultra-low-power operation in battery-backed systems |
| Wideband Noise | 93 μVrms (10 Hz–10 kHz) - supports high-resolution ADC biasing without added filtering |
| Dynamic Impedance | 0.5 Ω at 1 mA - maintains tight regulation under fast load transients |
| Long-Term Stability | 120 ppm after 1000 hrs - reduces calibration drift in field-deployed instrumentation |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC MO-178AC compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference voltage node | Connects to regulated voltage rail; sinks all operating + load current |
| Anode (Pin 2) | Reference ground return | Must be connected to system ground; forms the 0 V reference point for VOUT |
| NC (Pin 3) | No internal connection | Must be left floating; not bonded internally - no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact layouts without stability-compromising external components |
| Tolerates capacitive loads | Stable with any value of output capacitance - eliminates ESR constraints on bypass caps |
| Fixed 4.096 V output | Matches standard 12-bit DAC/ADC full-scale ranges (e.g., 4096 LSB = 1 V per LSB) |
| Industrial & extended temp range | Rated for −40°C to 125°C operation - suitable for automotive under-hood and industrial control environments |
| Low 93 μVrms noise | Preserves signal integrity in 16+ bit data acquisition without post-regulation filtering |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeters and sensor loggers powered by coin cells or Li-ion batteries. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V excitation and ADC reference for ratiometric measurements. Use Value: 73 μA minimum current enables >1-year battery life; ±0.5% tolerance meets Class II meter accuracy requirements. |
Use Scenario: Modular DAQ modules in PLC backplanes or lab equipment requiring multi-channel synchronized sampling. IC Role / Device Role / Timing Role: Precision voltage reference for SAR and sigma-delta ADCs, decoupled from noisy digital supply rails. Use Value: 93 μVrms noise and 0.5 Ω dynamic impedance prevent code flicker and maintain ENOB >15.5 bits at 100 kSPS. |
| Energy Monitoring Meters | Automotive Body Control Modules |
Use Scenario: DIN-rail mounted kWh meters measuring grid voltage/current with metrology-grade accuracy. IC Role / Device Role / Timing Role: Primary reference for isolation-amplified voltage sensing and current shunt measurement chains. Use Value: 120 ppm long-term stability minimizes annual recalibration; 125°C rating supports transformer-coupled high-temp enclosures. |
Use Scenario: In-vehicle cabin sensors (temperature, humidity, occupancy) operating near HVAC ducts or engine bays. IC Role / Device Role / Timing Role: Stable bias source for analog front-end op-amps and ADCs in AEC-Q100-compliant subsystems. Use Value: Extended −40°C to 125°C range and 50 ppm/°C TC ensure < ±10 mV error across full automotive ambient profile. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3X-4.1 | Higher 100 ppm/°C max TC; 80 μA min current; 120 μVrms noise | Lower accuracy and higher noise limit use in <14-bit systems | Select when cost priority outweighs TC/noise requirements |
| REF3040AIDBZR | Series topology; 3.999 V output; ±0.2% A-grade; 45 μVrms noise; requires input capacitor | Needs headroom voltage; unsuitable for floating or high-side sensing | Choose for lowest noise in supply-referenced designs with ≥1.5 V overhead |
Compared with LM4040CIM3X-4.1, the LM4050CIM3X-4.1 delivers tighter temperature drift and lower noise for high-resolution metrology; versus REF3040AIDBZR, it offers shunt flexibility and zero-input-capacitor simplicity at the expense of series-regulator noise performance.
Availability
LM4050CIM3X-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, energy monitoring meters, and automotive body control modules requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4050CIM3X-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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of leadership in precision analog ICs.
The LM4050-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and high-accuracy measurement systems across industrial, automotive, and instrumentation markets.
FAQ
What is the output voltage tolerance of LM4050CIM3X-4.1 at 25°C?
The LM4050CIM3X-4.1 has a C-grade initial tolerance of ±21 mV (±0.5%) at 25°C, corresponding to a 4.096 V nominal output. This tolerance is verified during wafer sort using Zener-zap trimming and applies strictly at 100 μA test current per the datasheet's Electrical Characteristics table for the 4.1-V option.
Does LM4050CIM3X-4.1 require an external output capacitor?
No, the LM4050CIM3X-4.1 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including direct connection to large bulk capacitors or ADC input capacitors - a key advantage over older shunt references that demand minimum ESR or specific capacitor values.
What is the minimum operating current for LM4050CIM3X-4.1 over temperature?
The LM4050CIM3X-4.1 requires a minimum operating current of 73 μA across the full industrial/extended temperature range (−40°C to 125°C), as specified in Section 6.7 of the SNOS455G datasheet. At 25°C, the typical minimum is 52 μA, but design must accommodate the worst-case 73 μA to guarantee regulation.
Can LM4050CIM3X-4.1 be used in automotive applications?
Yes - while the LM4050CIM3X-4.1 itself is the industrial-grade variant, it shares the same SOT-23 DBZ package and core electrical specs as the AEC-Q100 Grade 1 qualified LM4050CIM3X-4.1-Q1. Its −40°C to 125°C rating, 120 ppm long-term stability, and robust ESD ratings (±2000 V HBM) support non-safety-critical automotive body electronics.
How does the noise performance of LM4050CIM3X-4.1 compare to other 4.1-V shunt references?
The LM4050CIM3X-4.1 specifies 93 μVrms wideband noise (10 Hz–10 kHz) at 100 μA, which is lower than the LM4040CIM3X-4.1 (120 μVrms) and competitive with mid-tier series references. This noise level supports effective use with 16-bit SAR ADCs without additional filtering, directly contributing to system ENOB preservation in LM4050CIM3X-4.1-based designs.
LM4050CIM3X-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
LM4050CIM3X-4.1 FAQ
1.How can I place an order for LM4050CIM3X-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3X-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 LM4050CIM3X-4.1 reliable?
The price and inventory of LM4050CIM3X-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 LM4050CIM3X-4.1 is usually 5 days.
3.What payment methods are accepted for LM4050CIM3X-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3X-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3X-4.1?
LM4050CIM3X-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3X-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 LM4050CIM3X-4.1?
For technical support, including LM4050CIM3X-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3X-4.1 requirements.
6.How does Aetrix verify that LM4050CIM3X-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3X-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 LM4050CIM3X-4.1 meets industry standards.
7.What is the process for return or replacement of LM4050CIM3X-4.1?
All LM4050CIM3X-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3X-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 LM4050CIM3X-4.1 part is unused and in its original packaging.
Return procedure for LM4050CIM3X-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4050CIM3X-4.1 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
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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
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