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Analog Devices Inc./Maxim Integrated LM4050CIM3-4.1+
- Part No.:
- LM4050CIM3-4.1+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3-4.1+.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:2,924
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Product details
Overview
LM4050CIM3-4.1+ from Maxim Integrated is a precision 4.096V shunt voltage reference in SC70-3 package, featuring ±0.5% initial accuracy, 50ppm/°C max temperature coefficient, and 60µA–15mA operating current range. It delivers stable reverse breakdown voltage for ADC/DAC reference, portable power monitoring, and battery management circuits where space and thermal stability are critical.
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 guaranteed -40°C to +125°C operation, no external capacitor requirement, low 64µVRMS wideband noise (10Hz–10kHz), and compatibility with capacitive loads in high-density PCB layouts.
Technical Context
The LM4050CIM3-4.1+ uses laser-trimmed bandgap circuitry to maintain precise 4.096V reverse breakdown voltage across its cathode-anode terminals. Its internal pass transistor sinks shunt current dynamically to regulate output under varying load and supply conditions.
It operates as a two-terminal shunt device with pin 3 (N.C.) floating or tied to pin 2, requiring only a series resistor (RS) for biasing. Stability is ensured over 60µA–15mA shunt current without output capacitance, and it tolerates any capacitive load while maintaining regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; enables exact 12-bit full-scale ADC reference (e.g., 4096 codes = 4.096V) |
| Initial Accuracy | ±0.5% at +25°C; corresponds to ±20.5mV tolerance for system-level calibration margin |
| Tempco | 50ppm/°C max over -40°C to +125°C; contributes ≤±0.5% drift across full industrial range |
| Shunt Current Range | 60µA to 15mA; supports ultra-low-power sensor nodes and high-current reference buffering |
| Wideband Noise | 64µVRMS (10Hz–10kHz); limits effective resolution in 16-bit+ data acquisition systems |
| Dynamic Impedance | 0.5Ω to 1.0Ω at 1mA; ensures <1mV output shift under 1mA load transients |
| Long-Term Stability | 120ppm over 1000h; defines baseline drift for 10-year system reliability modeling |
Pinout & Package
LM4050CIM3-4.1+ is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or connected to pin 2 per datasheet directive.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-biased terminal; connects to regulated voltage node (e.g., ADC REF+) |
| 2 (−) | Anode | Reference ground return; ties to system AGND or low-noise analog ground |
| 3 (N.C.) | No Connection | Must remain unconnected or shorted to pin 2; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23, critical for wearables and IoT sensors |
| No output capacitor required | Eliminates BOM cost and layout risk associated with stability-compensating capacitors |
| Capacitive load tolerance | Stable with any output capacitance (0–∞), enabling direct connection to ADC input caps or long traces |
| Guaranteed -40°C to +125°C operation | Validated performance across full automotive and industrial ambient ranges without derating |
| Low micropower quiescent current | 60µA minimum operating current enables battery life extension in always-on monitoring systems |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered ECG front-end with 16-bit SAR ADC requiring stable reference under varying battery voltage (2.8V–4.2V). IC Role / Device Role / Timing Role: Shunt reference providing 4.096V reference to ADC REF+ pin, sinking dynamic current via RS resistor. Use Value: Enables full 12-bit code utilization (0–4095) without software gain correction; 64µVRMS noise preserves ENOB ≥15.2 bits. | Use Scenario: 4–20mA loop-powered transmitter with microcontroller-based signal conditioning. IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and sensor excitation voltage generation. Use Value: ±0.5% initial accuracy and 50ppm/°C tempco ensure <0.25% total error over field temperature range, meeting Class A transmitter specs. |
| Smart Energy Meters | Automotive Body Control Modules |
Use Scenario: Polyphase electricity meter with isolated metrology IC requiring accurate voltage reference for RMS calculations. IC Role / Device Role / Timing Role: Primary reference for metrology ADC, powered from isolated DC-DC converter output. Use Value: Long-term stability (120ppm/1000h) minimizes calibration drift between utility-mandated recalibration intervals (10 years). | Use Scenario: In-cabin temperature/humidity sensor module operating in 125°C under-hood environment. IC Role / Device Role / Timing Role: Reference for local ADC measuring thermistor and capacitive humidity sensor outputs. Use Value: Guaranteed operation at +125°C ambient eliminates need for thermal derating or heatsinking in compact modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | 2.5V adjustable (via resistors); 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3 | Requires external resistors to set 4.096V; higher tempco increases drift in wide-temp applications | Choose when design already uses TLVH431 family and board space allows resistor network |
| ADR3440ARJZ-R7 | 4.096V fixed; 0.1% initial accuracy; 30ppm/°C tempco; SOT23-5 (with enable) | Higher accuracy and lower tempco but larger 5-pin package and enable pin adds control complexity | Choose when tighter initial tolerance and lower drift outweigh SC70 size advantage |
Compared with TLVH431ACDBVR and ADR3440ARJZ-R7, LM4050CIM3-4.1+ offers optimal balance of SC70 size, 4.096V factory-trimmed accuracy, and guaranteed industrial temperature support-without external components or enable logic overhead.
Availability
LM4050CIM3-4.1+ is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition, smart energy meters, and automotive body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
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
Maxim Integrated (now part of Analog Devices) designs precision analog and mixed-signal ICs for industrial, automotive, and communications markets, with emphasis on high-reliability, low-power, and miniaturized solutions.
The LM4050/LM4051 product line delivers factory-trimmed shunt references optimized for space-constrained, wide-temperature applications where external compensation and layout sensitivity must be eliminated.
FAQ
What is the maximum shunt current rating for LM4050CIM3-4.1+?
The absolute maximum reverse current for LM4050CIM3-4.1+ is 20mA, though continuous operation above 15mA is not recommended due to thermal limitations in the SC70 package. At 15mA and 4.096V, power dissipation reaches 61.4mW-within the 174mW limit at +70°C ambient, but requires careful thermal design above that temperature.
Does LM4050CIM3-4.1+ require an external capacitor for stability?
No, LM4050CIM3-4.1+ does not require an external output capacitor and remains stable with any capacitive load-including zero capacitance or multi-microfarad bulk caps. This eliminates layout sensitivity and reduces BOM count compared to series references needing decoupling.
What is the meaning of the "C" grade in LM4050CIM3-4.1+?
The "C" in LM4050CIM3-4.1+ denotes the 0.5% initial accuracy grade at +25°C. It also specifies a maximum temperature coefficient of 50ppm/°C over -40°C to +125°C, defining the worst-case voltage drift envelope across industrial temperature extremes.
Can pin 3 of LM4050CIM3-4.1+ be left unconnected?
Yes-pin 3 is designated N.C. (no connection) and must be left floating or connected to pin 2 (anode) as specified in the datasheet. It is not internally bonded, and connecting it elsewhere may compromise performance or reliability.
How does LM4050CIM3-4.1+ compare to LM4050AIM3-4.1+?
LM4050CIM3-4.1+ and LM4050AIM3-4.1+ share identical electrical specifications and SC70-3 packaging, but differ in accuracy grade: "C" = ±0.5%, "A" = ±0.1%. Both are RoHS-compliant (+ suffix), operate over -40°C to +125°C, and use the same X3-2 package variant.
LM4050CIM3-4.1+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- 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
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
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