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Analog Devices Inc./Maxim Integrated LM4040CIM3-3.0
- Part No.:
- LM4040CIM3-3.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-3.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:97,820
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Product details
Overview
LM4040CIM3-3.0 from Maxim Integrated is a precision 3.000V two-terminal shunt voltage reference in SOT23-3 package, featuring ±0.5% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +85°C, 60µA–15mA operating current range, and 45µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in portable battery-powered systems requiring minimal board space and low quiescent current.
For engineers reviewing the LM4040CIM3-3.0 datasheet, LM4040CIM3-3.0 pinout, LM4040CIM3-3.0 application, or LM4040CIM3-3.0 equivalent, key selection factors include its fixed 3.000V reverse breakdown voltage, no-output-capacitor requirement, SC70/SOT23 package compatibility, and guaranteed stability with capacitive loads across industrial temperature range.
Technical Context
The LM4040CIM3-3.0 implements a bandgap-based shunt reference architecture, behaving electrically like an ideal Zener diode-maintaining a precise 3.000V across its terminals when reverse-biased with 60µA to 15mA. Its BiCMOS process enables low dynamic impedance (≤0.9Ω at 1mA) and stable regulation without external compensation.
It operates without output capacitance and tolerates arbitrary capacitive loading due to inherent phase margin design. The device's temperature performance is characterized by a maximum ±15ppm/°C coefficient over –40°C to +85°C, with long-term stability of 120ppm after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V nominal reverse breakdown voltage, tightly controlled within ±15mV (C-grade) at +25°C for accurate ADC/DAC biasing. |
| Initial Accuracy | ±0.5% (C grade), enabling direct use in 10-bit systems without calibration. |
| Temp. Coefficient | ±15ppm/°C max over –40°C to +85°C, limiting drift to ±0.975mV across full range. |
| Operating Current | 60µA minimum to 15mA maximum shunt current, supporting ultra-low-power sensor nodes and high-current analog front-ends. |
| Dynamic Impedance | ≤0.9Ω at 1mA, ensuring <1mV output shift under 1mA load transients. |
| Output Noise | 45µVRMS (10Hz–10kHz), suitable for precision 12-bit+ data acquisition without additional filtering. |
| Long-Term Stability | 120ppm (0.012%) drift after 1000 hours, reducing recalibration frequency in field-deployed equipment. |
Pinout & Package
LM4040CIM3-3.0 uses the industry-standard 3-pin SOT23-3 surface-mount package (2.92mm × 1.3mm × 1.0mm), compatible with automated assembly and offering thermal performance up to 320mW at +70°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive terminal | Connects to system ground or low-side reference node; reverse current enters here during regulation. |
| 2 (–) | Cathode / Negative terminal | Connects to regulated voltage node; output voltage appears between Pin 2 and Pin 1. |
| 3 (N.C.) | No connection | Must be left floating or tied to Pin 2; not internally bonded-absence prevents parasitic leakage paths. |
Key Features
| Feature | Design Value |
|---|---|
| Shunt topology | Two-terminal operation eliminates need for supply rail-ideal for high-side sensing and floating references. |
| No output capacitor required | Guaranteed stability with any capacitive load, simplifying layout and eliminating capacitor BOM cost and aging concerns. |
| Laser-trimmed accuracy | 0.5% initial tolerance achieved via on-die resistor trimming, avoiding post-package calibration. |
| Wide current range | 60µA–15mA operation supports both micropower IoT sensors and higher-current analog circuits from single design. |
| Low noise performance | 45µVRMS broadband noise enables direct interface with 12-bit SAR ADCs without external filtering. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered pulse oximeter measuring weak photodiode currents with 12-bit resolution. IC Role / Device Role / Timing Role: Provides stable 3.000V reference for transimpedance amplifier gain setting and ADC VREF input. Use Value: ±0.5% accuracy and 45µVRMS noise ensure <0.1% measurement error and eliminate need for reference buffer or noise filtering. | Use Scenario: Remote environmental monitor logging temperature/humidity over 5-year battery life. IC Role / Device Role / Timing Role: Supplies precision reference to low-power microcontroller ADC and analog sensor signal conditioning. Use Value: 60µA minimum operating current enables >10-year operation on coin cell; ±15ppm/°C tempco maintains accuracy across outdoor temperature swings. |
| Automotive Cabin Controllers | Smart Energy Meters |
Use Scenario: HVAC control module measuring thermistor networks in vehicle cabin. IC Role / Device Role / Timing Role: Delivers stable 3.000V reference for ratiometric sensor measurements across –40°C to +85°C ambient. Use Value: Guaranteed ±15ppm/°C tempco and 120ppm long-term stability reduce calibration drift, meeting AEC-Q200-relevant reliability targets. | Use Scenario: Revenue-grade electricity meter requiring metrology-grade voltage reference for 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Serves as primary shunt reference for isolated voltage sensing stage feeding energy measurement IC. Use Value: Low 0.9Ω dynamic impedance ensures <1mV regulation error under varying load conditions, directly improving kWh accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | 3.0V output, ±0.5% initial accuracy, 50ppm/°C tempco, SOT23-3, requires ≥75µA min current. | Higher tempco increases drift by ~2× over industrial range; wider min current limits ultra-low-power use. | Select TL4050C30IDBZR only if legacy TI supply chain alignment is required and tempco budget allows. |
| ADR3430ARJZ-R7 | 3.0V output, ±0.1% initial accuracy, ±10ppm/°C tempco, SOT23-5, active 3-terminal topology, 100µA typical quiescent current. | Requires separate supply pin and ground; incompatible pinout and topology-cannot substitute without PCB redesign. | Choose ADR3430ARJZ-R7 only for applications demanding tighter accuracy and lower tempco where 3-terminal architecture is acceptable. |
Compared with TL4050C30IDBZR and ADR3430ARJZ-R7, LM4040CIM3-3.0 offers optimal balance of accuracy, tempco, and true two-terminal simplicity-enabling drop-in replacement in space-constrained shunt reference designs without layout changes or supply rail dependencies.
Availability
LM4040CIM3-3.0 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, automotive cabin controllers, and smart energy meters requiring stable component supply with guaranteed long-term availability.
Supply support for LM4040CIM3-3.0 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, communications, and consumer applications.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated systems needing stable, low-drift references without external components.
FAQ
What is the exact output voltage tolerance of LM4040CIM3-3.0 at +25°C?
The LM4040CIM3-3.0 has a nominal output voltage of 3.000V with a C-grade initial tolerance of ±0.5%, meaning its measured reverse breakdown voltage falls between 2.985V and 3.015V at +25°C per the datasheet's ELECTRICAL CHARACTERISTICS table for LM4040_I_3-3.0.
Does LM4040CIM3-3.0 require an external output capacitor for stability?
No, LM4040CIM3-3.0 does not require an external output capacitor. Its internal design guarantees stability with any capacitive load, including zero capacitance-eliminating BOM cost, board area, and reliability risks associated with external capacitors.
What is the minimum operating current for LM4040CIM3-3.0 across temperature?
The LM4040CIM3-3.0 requires a minimum shunt current of 60µA to maintain regulation across its full operating temperature range of –40°C to +85°C, as specified in the ELECTRICAL CHARACTERISTICS table for LM4040_I_3-3.0.
Can LM4040CIM3-3.0 be used in place of a Zener diode in existing designs?
Yes, LM4040CIM3-3.0 can directly replace standard Zener diodes in shunt reference configurations. It provides superior initial accuracy (±0.5% vs. ±5% typical for Zeners), lower tempco (±15ppm/°C vs. ±5000ppm/°C), and guaranteed stability without external capacitors-requiring only pin-for-pin substitution in SOT23-3 footprints.
What is the maximum shunt current LM4040CIM3-3.0 can safely handle?
The absolute maximum reverse current for LM4040CIM3-3.0 is 20mA, but its recommended operating range is 60µA to 15mA. Exceeding 15mA risks exceeding power dissipation limits, especially above +70°C, where derating applies per the Absolute Maximum Ratings table.
LM4040CIM3-3.0 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:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3-3.0 FAQ
1.How can I place an order for LM4040CIM3-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-3.0 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 LM4040CIM3-3.0 reliable?
The price and inventory of LM4040CIM3-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-3.0 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-3.0?
LM4040CIM3-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-3.0 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 LM4040CIM3-3.0?
For technical support, including LM4040CIM3-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-3.0 requirements.
6.How does Aetrix verify that LM4040CIM3-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-3.0 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 LM4040CIM3-3.0 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-3.0?
All LM4040CIM3-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-3.0, 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 LM4040CIM3-3.0 part is unused and in its original packaging.
Return procedure for LM4040CIM3-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM3-3.0 Tags
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