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Analog Devices Inc./Maxim Integrated LM4050CIM3-3.0-T
- Part No.:
- LM4050CIM3-3.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4050CIM3-3.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:7,350
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Product details
Overview
LM4050CIM3-3.0-T from Maxim Integrated is a precision 3.000V shunt voltage reference in SC70-3 package, featuring ±15ppm/°C temperature coefficient, 0.5% initial accuracy, and stable operation from 60µA to 15mA shunt current. It delivers low 45µVRMS wideband noise (10Hz–10kHz) and supports space-constrained battery-powered instrumentation requiring high stability over −40°C to +125°C.
For engineers reviewing the LM4050CIM3-3.0-T datasheet, LM4050CIM3-3.0-T pinout, LM4050CIM3-3.0-T application, or LM4050CIM3-3.0-T equivalent, key selection criteria include guaranteed reverse breakdown voltage tolerance (±15mV at +25°C), no external capacitor requirement, capacitive load tolerance, and SC70 footprint compatibility with tight PCB area budgets.
Technical Context
The LM4050CIM3-3.0-T implements a bandgap-based two-terminal shunt architecture that clamps voltage across its terminals when reverse-biased between 60µA and 15mA. Its internal laser-trimmed resistor network ensures 0.5% initial accuracy, while BiCMOS process enables stable regulation without output capacitance.
It operates as a passive reference node-sinking variable current to maintain fixed 3.000V across its anode-cathode terminals-and exhibits low dynamic impedance (≤0.9Ω at 1mA/120Hz), enabling robust performance under varying load and supply conditions across industrial temperature extremes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V nominal reverse breakdown voltage, ±15mV tolerance at +25°C (LM4050C grade) |
| Initial Accuracy | ±0.5% over temperature range, enabling direct use in 12-bit ADC reference paths without trimming |
| Tempco | ±15ppm/°C max (−40°C to +125°C), ensuring ≤±0.45% voltage drift across full operating range |
| Shunt Current Range | 60µA to 15mA operational range, supporting micropower sensor biasing and higher-current DAC references |
| Output Noise | 45µVRMS (10Hz–10kHz), suitable for precision analog front-ends requiring low noise floor |
| Dynamic Impedance | ≤0.9Ω at 1mA/120Hz, minimizing load-induced voltage variation in dynamic current-sink applications |
| Long-Term Stability | 120ppm after 1000 hours, critical for systems requiring calibration longevity |
Pinout & Package
LM4050CIM3-3.0-T uses the 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is NC and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; defines reference potential reference point |
| 2 (−) | Cathode (negative terminal) | Connects to regulated voltage node; sinks shunt current to maintain 3.000V across terminals |
| 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; no internal function or signal routing |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint reduces PCB area by 50% vs. SOT23, ideal for wearables and compact modules |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout risk of external compensation |
| Wide shunt current range | 60µA–15mA operation supports both ultra-low-power sensors and moderate-current data converters |
| Low wideband noise | 45µVRMS (10Hz–10kHz) enables use in high-resolution 16-bit+ SAR and delta-sigma ADC references |
| High-temp rated operation | Specified from −40°C to +125°C with guaranteed parameters, suitable for automotive under-hood and industrial control |
Applications
| Portable Medical Sensors | Industrial Data Acquisition |
|---|---|
Use Scenario: Battery-powered handheld blood glucose meter with 12-bit ADC and low-power microcontroller. IC Role / Device Role / Timing Role: Provides stable 3.000V reference for ADC conversion and sensor excitation circuitry. Use Value: Enables accurate glucose concentration calculation within ±0.5% full-scale error over battery discharge and ambient temperature shifts. | Use Scenario: 4–20mA loop-powered field transmitter measuring pressure in oil & gas pipelines. IC Role / Device Role / Timing Role: Supplies precise 3.000V reference for DAC-controlled current output stage and sensor signal conditioning. Use Value: Maintains <±0.1% current loop accuracy across −40°C to +85°C ambient, meeting SIL-2 functional safety requirements. |
| Wireless IoT Node | Automotive Cabin Control |
Use Scenario: Sub-GHz LPWAN sensor node monitoring warehouse temperature/humidity with coin-cell battery. IC Role / Device Role / Timing Role: Powers analog front-end and serves as reference for ultra-low-power SAR ADC during wake-up bursts. Use Value: Delivers 45µVRMS noise floor and 60µA minimum operating current, extending battery life beyond 5 years. | Use Scenario: HVAC control module inside vehicle cabin with wide ambient temperature swings. IC Role / Device Role / Timing Role: Stabilizes reference voltage for microcontroller ADC inputs monitoring thermistor networks and potentiometer feedback. Use Value: ±15ppm/°C tempco ensures consistent climate setpoint accuracy despite cabin temperatures ranging from −30°C to +85°C. |
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 reference (1.24V–18V), 0.5% initial accuracy, 100ppm/°C tempco, SOT23-3 | Requires external resistors for 3.0V setting; higher tempco limits high-precision use | Select when adjustable output or higher voltage capability is needed; verify layout for thermal coupling effects |
| REF3030AIDBVR | 3.0V series reference, 0.2% initial accuracy, 50ppm/°C tempco, SOT23-3, 50µA quiescent current | Series topology requires minimum load current; not a drop-in shunt replacement | Choose for lower noise (25µVRMS) and tighter accuracy where supply headroom permits series configuration |
Compared with TLVH431ACDBVR and REF3030AIDBVR, LM4050CIM3-3.0-T offers superior temperature stability (±15ppm/°C vs. 100ppm/°C or 50ppm/°C), true shunt operation without minimum load constraints, and guaranteed SC70 footprint compatibility for ultra-dense layouts.
Availability
LM4050CIM3-3.0-T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data acquisition systems, wireless IoT nodes, and automotive cabin controls requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4050CIM3-3.0-T 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 demanding industrial, automotive, and communications applications.
The LM4050/LM4051 family was engineered as micropower shunt references targeting space-constrained, battery-operated systems needing high accuracy and wide-temperature stability without external compensation.
FAQ
What is the guaranteed output voltage tolerance of LM4050CIM3-3.0-T at +25°C?
The LM4050CIM3-3.0-T is specified with ±15mV (±0.5%) output voltage tolerance at +25°C per the LM4050C grade. This value is laser-trimmed during production and guaranteed across the full −40°C to +125°C operating range when combined with its ±15ppm/°C temperature coefficient.
Does LM4050CIM3-3.0-T require an external output capacitor for stability?
No, LM4050CIM3-3.0-T 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, eliminating layout sensitivity and reducing BOM count.
What is the minimum shunt current needed for LM4050CIM3-3.0-T to regulate properly?
The LM4050CIM3-3.0-T requires a minimum shunt current of 67µA to maintain regulation across its full temperature range. Below this threshold, output voltage may deviate outside specifications; design must ensure ISHUNT ≥ 67µA even at worst-case VS(MIN) and ILOAD(MAX).
Can LM4050CIM3-3.0-T be used in automotive under-hood applications?
LM4050CIM3-3.0-T is rated for −40°C to +125°C operation and meets all electrical specifications across this range, making it suitable for automotive cabin and some under-hood applications. However, junction temperature must remain ≤+150°C-designers must verify power dissipation and thermal resistance in high-ambient scenarios.
How does the noise performance of LM4050CIM3-3.0-T compare to other 3V shunt references?
LM4050CIM3-3.0-T delivers 45µVRMS wideband noise (10Hz–10kHz), which is lower than most comparable shunt references in its class (e.g., TLVH431: ~80µVRMS). This enables higher effective resolution in 14–16-bit data acquisition systems where reference noise directly limits SNR.
LM4050CIM3-3.0-T 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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 50ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4050CIM3-3.0-T FAQ
1.How can I place an order for LM4050CIM3-3.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4050CIM3-3.0-T 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 LM4050CIM3-3.0-T reliable?
The price and inventory of LM4050CIM3-3.0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4050CIM3-3.0-T is usually 5 days.
3.What payment methods are accepted for LM4050CIM3-3.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4050CIM3-3.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4050CIM3-3.0-T?
LM4050CIM3-3.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4050CIM3-3.0-T 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 LM4050CIM3-3.0-T?
For technical support, including LM4050CIM3-3.0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4050CIM3-3.0-T requirements.
6.How does Aetrix verify that LM4050CIM3-3.0-T is sourced from the original manufacturer or authorized distributors?
All LM4050CIM3-3.0-T 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 LM4050CIM3-3.0-T meets industry standards.
7.What is the process for return or replacement of LM4050CIM3-3.0-T?
All LM4050CIM3-3.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4050CIM3-3.0-T, 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 LM4050CIM3-3.0-T part is unused and in its original packaging.
Return procedure for LM4050CIM3-3.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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