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Analog Devices Inc./Maxim Integrated LM4040CIX3-4.1+T
- Part No.:
- LM4040CIX3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040CIX3-4.1+T.pdf
- Description:
- IC VREF SHUNT 4.096V SC70
- Quantity:
- Payment:
- Shipping:
Inventory:2,509
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Product details
Overview
LM4040CIX3-4.1+T from Maxim Integrated is a precision 4.096V 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 ADC/DAC biasing, portable power monitoring, and industrial sensor signal conditioning.
For engineers reviewing the LM4040CIX3-4.1+T datasheet, LM4040CIX3-4.1+T pinout, LM4040CIX3-4.1+T application, or LM4040CIX3-4.1+T equivalent, key selection criteria include guaranteed -40°C to +85°C operation, no external capacitor requirement, low 64µVRMS wideband noise (10Hz–10kHz), and SC70 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4040CIX3-4.1+T uses bandgap-based shunt regulation to maintain a precise 4.096V reverse breakdown voltage across its anode–cathode terminals. Its internal laser-trimmed resistor network ensures ±0.5% initial accuracy at +25°C, with overtemperature tolerance of ±1.15% across -40°C to +85°C.
It operates as a two-terminal device requiring only a series source resistor to regulate against varying input voltages and load currents. With 0.5Ω typical dynamic impedance at 1mA and stability under any capacitive load, it eliminates need for output capacitance while supporting fast load-transient response down to 10µs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; tight tolerance enables direct interface with 12-bit ADC references without scaling. |
| Initial Accuracy | ±0.5% at +25°C; reduces calibration overhead in factory-trimmed systems. |
| Temp Coefficient | 100ppm/°C max; ensures ≤±0.47mV drift over full -40°C to +85°C range. |
| Operating Current | 60μA to 15mA; supports ultra-low-power sleep modes and high-current precision sensing. |
| Dynamic Impedance | 0.5Ω typical at 1mA; maintains voltage stability during rapid load transients. |
| Wideband Noise | 64µVRMS (10Hz–10kHz); suitable for high-resolution data acquisition without added filtering. |
| Long-Term Stability | 120ppm after 1000h; ensures reference integrity over product lifetime in unattended deployments. |
Pinout & Package
LM4040CIX3-4.1+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 internally unconnected and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-biased terminal; connects to regulated voltage node and series current-limiting resistor. |
| 2 (–) | Anode | Reference ground return path; forms shunt current loop with cathode and load. |
| 3 (N.C.) | No Connection | Internally unconnected; must remain unattached or shorted to pin 2 to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint saves >50% board area vs. SOT23, critical for wearables and compact modules. |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout risk from external COUT. |
| Low 64µVRMS noise | Enables 12-bit+ measurement accuracy without post-regulation filtering in sensitive analog front-ends. |
| 100ppm/°C tempco | Meets industrial-grade thermal drift requirements without active compensation circuitry. |
| 60μA minimum operating current | Supports battery-powered systems with microamp-level quiescent current budgets. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered pulse oximeter with integrated 12-bit ADC sampling analog photodiode signals. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC full-scale range, enabling accurate ratiometric conversion of optical measurements. Use Value: ±0.5% initial accuracy and 100ppm/°C drift ensure <±0.5 LSB error over temperature, eliminating field recalibration. | Use Scenario: Remote environmental monitor logging temperature/humidity via 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Supplies precision reference to ADC and analog front-end op-amps in low-power sleep/wake cycles. Use Value: 60μA min operating current allows continuous reference biasing during 10-second wake intervals without depleting coin-cell batteries. |
| Automotive Cabin Controllers | Smart Energy Meters |
Use Scenario: HVAC control module measuring thermistor networks and potentiometer feedback in vehicle dashboards. IC Role / Device Role / Timing Role: Shunt reference for microcontroller ADC inputs monitoring cabin temperature and airflow sensors. Use Value: Guaranteed operation from -40°C to +85°C ensures reliable performance across automotive ambient extremes without derating. | Use Scenario: DIN-rail mounted electricity meter performing metrology-grade voltage/current sampling. IC Role / Device Role / Timing Role: High-stability reference for isolated ADCs measuring mains voltage with 0.1% energy billing accuracy. Use Value: 120ppm long-term stability over 1000h guarantees <0.012% reference drift per year, meeting IEC 62053-21 Class 0.2 requirements. |
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 | Adjustable 1.24V–18V output; 0.5% initial accuracy; 100ppm/°C tempco; SOT23-3 package. | Requires two external resistors for 4.096V setting; higher minimum cathode current (80μA). | Select when programmability or higher voltage headroom is needed; verify layout accommodates resistor placement. |
| ADR3440ARJZ-R7 | Fixed 4.096V; 0.1% initial accuracy; 30ppm/°C tempco; SOT23-5 package with enable pin. | Higher accuracy and lower drift but larger footprint and active-enable logic required. | Choose for metrology-grade systems where ±0.1% tolerance justifies added complexity and cost. |
Compared with TLVH431ACDBVR and ADR3440ARJZ-R7, LM4040CIX3-4.1+T offers the smallest SC70 footprint and simplest two-terminal implementation for fixed 4.096V reference, trading absolute accuracy for board-area efficiency and zero external component count.
Availability
LM4040CIX3-4.1+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and automotive cabin controllers requiring stable component supply with consistent SC70-3 packaging and RoHS compliance.
Supply support for LM4040CIX3-4.1+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 designs precision analog and mixed-signal ICs for industrial, automotive, and computing applications, emphasizing high reliability and small-footprint solutions.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-sensitive systems requiring stable DC reference without external components.
FAQ
What is the guaranteed operating temperature range for LM4040CIX3-4.1+T?
The LM4040CIX3-4.1+T is specified for operation from -40°C to +85°C. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet, and applies specifically to the "I" grade (industrial) version denoted by the "I" in the part number. It is not rated for the extended -40°C to +125°C range reserved for "E" grade variants.
Does LM4040CIX3-4.1+T require an external output capacitor?
No, LM4040CIX3-4.1+T does not require an external output capacitor. The device is designed for unconditional stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates BOM cost, layout area, and potential resonance issues associated with external COUT.
What is the minimum shunt current needed for LM4040CIX3-4.1+T to maintain regulation?
The LM4040CIX3-4.1+T requires a minimum shunt current of 73μA at +25°C to maintain regulation, as specified in the Electrical Characteristics table for the 4.096V variant under the "Minimum Operating Current" parameter. This value increases slightly at temperature extremes but remains within the 60μA–15mA operational window.
How is pin 3 used on LM4040CIX3-4.1+T?
Pin 3 of LM4040CIX3-4.1+T is labeled N.C. (No Connection) and is internally unconnected. Per the Pin Configuration diagram and Pin Description section, it must either be left unconnected or tied directly to pin 2 (anode). Connecting pin 3 to any other net may cause unpredictable behavior or damage.
What is the wideband noise specification for LM4040CIX3-4.1+T?
The LM4040CIX3-4.1+T exhibits 64µVRMS wideband noise over the 10Hz to 10kHz frequency range, as measured at 100µA shunt current. This value is explicitly listed in the Electrical Characteristics table for the 4.096V version and directly impacts achievable resolution in high-precision ADC applications.
LM4040CIX3-4.1+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- 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:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040CIX3-4.1+T FAQ
1.How can I place an order for LM4040CIX3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIX3-4.1+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 LM4040CIX3-4.1+T reliable?
The price and inventory of LM4040CIX3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIX3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040CIX3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIX3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIX3-4.1+T?
LM4040CIX3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIX3-4.1+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 LM4040CIX3-4.1+T?
For technical support, including LM4040CIX3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIX3-4.1+T requirements.
6.How does Aetrix verify that LM4040CIX3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040CIX3-4.1+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 LM4040CIX3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040CIX3-4.1+T?
All LM4040CIX3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIX3-4.1+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 LM4040CIX3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040CIX3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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