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Analog Devices Inc./Maxim Integrated LM4040CIM3-3.0+T
- Part No.:
- LM4040CIM3-3.0+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-3.0+T.pdf
- Description:
- IC VREF SHUNT 3V SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,243
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Product details
Overview
LM4040CIM3-3.0+T from Maxim Integrated is a precision 3.000V two-terminal shunt voltage reference in SC70-3 package, featuring ±0.5% initial accuracy, 100ppm/°C max temperature coefficient, and 60μA–15mA operating current range. It delivers stable reverse-breakdown voltage for analog-to-digital converter (ADC) reference, battery-monitoring circuits, and portable power management systems.
For engineers reviewing the LM4040CIM3-3.0+T datasheet, LM4040CIM3-3.0+T pinout, LM4040CIM3-3.0+T application, or LM4040CIM3-3.0+T equivalent, this page provides verified electrical specifications, thermal performance data across –40°C to +85°C, SC70 package footprint details, and validated alternative options for space-constrained, micropower designs.
Technical Context
The LM4040CIM3-3.0+T uses bandgap-based shunt regulation to maintain a precise 3.000V reverse breakdown voltage without requiring external capacitors. Its laser-trimmed resistor network ensures factory-calibrated accuracy, while low dynamic impedance (≤0.9Ω at 1mA) sustains regulation across wide load and temperature variations.
Designed for direct replacement of Zener diodes in precision references, it operates with forward current up to 10mA and reverse current from 60μA to 15mA. The device guarantees stability with any capacitive load and exhibits 45µVRMS wideband noise (10Hz–10kHz) at 100μA bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.000V nominal; guaranteed 2.985V–3.015V at +25°C (C-grade, ±0.5%) |
| Initial Accuracy | ±0.5% (±15mV) at +25°C; enables 12-bit ADC reference without trimming |
| Tempco | ≤100ppm/°C over –40°C to +85°C; supports industrial-grade temperature stability |
| Operating Current | 60μA minimum to 15mA maximum; allows ultra-low-power sensor nodes and high-current reference buffers |
| Dynamic Impedance | ≤0.9Ω at 1mA, 120Hz; ensures minimal output voltage shift under load transients |
| Wideband Noise | 45µVRMS (10Hz–10kHz); suitable for high-resolution data acquisition systems |
| Long-Term Stability | 120ppm after 1000 hours; supports reliable operation in mission-critical instrumentation |
Pinout & Package
The LM4040CIM3-3.0+T is housed in a RoHS-compliant 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Positive terminal (cathode) | Reverse-biased input; connects to supply rail via series resistor |
| 2 (–) | Negative terminal (anode) | Reference ground node; common return path for shunt current |
| 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; no internal function |
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 | Internally compensated for stability with any capacitive load-eliminates BOM cost and layout risk |
| Low 45µVRMS noise | Enables ≤16-bit effective resolution in precision ADC applications without external filtering |
| Guaranteed –40°C to +85°C operation | Validated performance across full industrial temperature range without derating |
| 60μA minimum operating current | Supports micropower designs including coin-cell-powered sensors and energy-harvesting systems |
Applications
| Portable Power Monitoring | Industrial Data Acquisition |
|---|---|
|
Use Scenario: Real-time battery voltage tracking in handheld medical devices and IoT edge nodes. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.000V基准 for 12-bit SAR ADC input scaling. Use Value: ±0.5% initial accuracy and 100ppm/°C tempco ensure <±1 LSB error across –20°C to +70°C ambient. |
Use Scenario: Precision sensor signal conditioning in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Reference source for 16-bit delta-sigma ADCs measuring 4–20mA loop signals. Use Value: 45µVRMS noise and ≤0.9Ω dynamic impedance prevent gain drift and quantization noise degradation. |
| Automotive Body Control | Test & Measurement Equipment |
|
Use Scenario: Supply rail monitoring in automotive body control units (BCUs) with 5V–16V battery input. IC Role / Device Role / Timing Role: Stable 3.000V reference for microcontroller ADC used in voltage supervisor functions. Use Value: Guaranteed operation to +85°C and 15mA shunt capability support robustness during engine-bay thermal cycling. |
Use Scenario: Calibration reference in benchtop multimeters and automated test equipment (ATE). IC Role / Device Role / Timing Role: Primary voltage standard for self-test and auto-zero routines in 6½-digit DMM front-ends. Use Value: 120ppm long-term stability and ±0.5% accuracy reduce calibration frequency and improve measurement traceability. |
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% accuracy, SOT23-3 package, 100ppm/°C tempco, but requires ≥70μA min current | Higher minimum current increases quiescent power in sub-100μA systems | Select when SOT23 footprint compatibility is required and board space permits larger package |
| REF3030AIDBZR | 3.0V output, ±0.2% accuracy, SOT23-3, 50ppm/°C tempco, but series topology (not shunt) and needs 50μA supply current | Series architecture eliminates external series resistor but adds supply dependency and dropout voltage | Select when higher accuracy and lower tempco are critical, and system can accommodate series regulator constraints |
Compared with TL4050C30IDBZR and REF3030AIDBZR, the LM4040CIM3-3.0+T offers the smallest footprint (SC70), lowest minimum operating current (60μA), and true shunt architecture enabling resistor-based biasing-making it optimal for ultra-compact, micropower, and high-reliability analog reference designs.
Availability
LM4040CIM3-3.0+T is available at Aetrix Electronics and suitable for portable power monitoring, industrial data acquisition, automotive body control, and test & measurement equipment requiring stable component supply across extended production lifecycles.
Supply support for LM4040CIM3-3.0+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, mixed-signal, and power management ICs for industrial, automotive, and communications applications.
The LM4040 product line delivers micropower, high-accuracy shunt voltage references optimized for space-constrained, battery-operated, and high-stability instrumentation systems.
FAQ
What is the guaranteed operating temperature range for LM4040CIM3-3.0+T?
The LM4040CIM3-3.0+T is specified and guaranteed over –40°C to +85°C. This I-grade temperature range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet. It does not carry the extended E-grade (–40°C to +125°C) qualification, and its thermal performance metrics-including tempco and long-term stability-are validated only within the I-grade range.
Can LM4040CIM3-3.0+T be used without an external series resistor?
No. The LM4040CIM3-3.0+T is a shunt reference and must be biased with a series resistor between the supply and pin 1 (+). This resistor sets the shunt current (ISHUNT) to maintain regulation. The datasheet specifies a minimum ISHUNT of 60μA and maximum of 15mA; omitting the resistor prevents proper reverse biasing and results in no regulated output.
Is pin 3 of LM4040CIM3-3.0+T functional or optional?
Pin 3 of LM4040CIM3-3.0+T is explicitly designated N.C. (No Connection) in the Pin Description and Pin Configuration diagrams. It must either be left unconnected or tied to pin 2 (–). Connecting it to any other node-or assuming functionality-violates the device's internal design and may compromise accuracy or reliability.
How does the 100ppm/°C temperature coefficient affect LM4040CIM3-3.0+T in a 50°C ambient swing?
Over a 50°C ambient change (e.g., 25°C to 75°C), the LM4040CIM3-3.0+T's 100ppm/°C tempco contributes up to ±5mV (100ppm × 50°C × 3.0V) of output drift. Combined with its ±15mV initial tolerance, total worst-case deviation remains within ±20mV-sufficient for 12-bit systems where 1 LSB at 3.0V equals ~0.73mV.
Does LM4040CIM3-3.0+T require an output capacitor for stability?
No. The LM4040CIM3-3.0+T is internally compensated and stable with any capacitive load, including 0µF. The datasheet explicitly states "No Output Capacitors Required" and confirms stability across all output capacitance values-a key advantage over many competing shunt references that mandate minimum COUT for phase margin.
LM4040CIM3-3.0+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 45µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 67 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3-3.0+T FAQ
1.How can I place an order for LM4040CIM3-3.0+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-3.0+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 LM4040CIM3-3.0+T reliable?
The price and inventory of LM4040CIM3-3.0+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-3.0+T is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-3.0+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-3.0+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-3.0+T?
LM4040CIM3-3.0+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-3.0+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 LM4040CIM3-3.0+T?
For technical support, including LM4040CIM3-3.0+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-3.0+T requirements.
6.How does Aetrix verify that LM4040CIM3-3.0+T is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-3.0+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 LM4040CIM3-3.0+T meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-3.0+T?
All LM4040CIM3-3.0+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-3.0+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 LM4040CIM3-3.0+T part is unused and in its original packaging.
Return procedure for LM4040CIM3-3.0+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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