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Analog Devices Inc./Maxim Integrated LM4040BIM3-4.1+T
- Part No.:
- LM4040BIM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-4.1+T.pdf
- Description:
- IC VREF SHUNT 4.096V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,475
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Product details
Overview
LM4040BIM3-4.1+T from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, featuring 0.2% initial accuracy, 100ppm/°C max temperature coefficient, and stable operation from 60μA to 15mA shunt current. It delivers low 64μVRMS wideband noise (10Hz–10kHz) and requires no external capacitor, making it ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4040BIM3-4.1+T datasheet, LM4040BIM3-4.1+T pinout, LM4040BIM3-4.1+T application, or LM4040BIM3-4.1+T equivalent, key selection criteria include its guaranteed -40°C to +85°C operating range, 3-pin SC70 footprint, reverse-breakdown topology, and compatibility with capacitive loads without stability compensation.
Technical Context
The LM4040BIM3-4.1+T uses a laser-trimmed bandgap core to maintain a precise 4.096V reverse breakdown voltage across its cathode-anode terminals. Its two-terminal architecture eliminates need for input supply rails-only a series resistor and load are required for regulation.
It operates as a passive shunt element: when reverse-biased above its breakdown threshold, it sinks variable current to hold VSHUNT constant. Dynamic impedance is ≤1.0Ω at 1mA, ensuring minimal voltage shift under load transients up to 15mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±8.2mV (±0.2%) tolerance at +25°C ensures accurate scaling for 12-bit systems. |
| Initial Accuracy | 0.2% (B-grade); enables single-point calibration in precision sensor signal chains without trimming. |
| Tempco | 100ppm/°C max over -40°C to +85°C; contributes ≤±0.83mV drift across full range, critical for automotive cabin modules. |
| Shunt Current Range | 60μA to 15mA; supports ultra-low-power sleep modes and high-current reference buffering in same design. |
| Wideband Noise | 64μVRMS (10Hz–10kHz); low enough to avoid degrading ENOB in 16-bit SAR ADCs. |
| Dynamic Impedance | ≤1.0Ω at 1mA; maintains <±1mV regulation error during 1mA load steps, simplifying power-supply rejection design. |
| Long-Term Stability | 120ppm after 1000h; predictable aging behavior supports 10-year industrial field reliability targets. |
Pinout & Package
Package: SC70-3 (1.8mm × 1.8mm), RoHS-compliant, tape-and-reel. Pin 3 is NC (no connection) and must be left floating or tied to pin 2 per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias terminal; connects to regulated output node and series resistor from higher-voltage rail. |
| 2 (–) | Anode | Reference ground return; forms low-impedance path for shunt current and defines 0V reference point. |
| 3 (N.C.) | No Connection | Internally unconnected; must not be soldered or biased-floating or tied to pin 2 only. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23, enabling dense portable PCB layouts. |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout risk of external C. |
| Low 64μVRMS noise | Enables direct use in high-resolution data acquisition without post-regulation filtering. |
| 60μA minimum operating current | Supports battery-powered devices drawing <100μA system current while maintaining reference integrity. |
| 100ppm/°C tempco | Meets AEC-Q100 Grade 3 requirements for under-hood automotive sensors without thermal compensation. |
Applications
| Portable Medical Sensors | Industrial Data Loggers |
|---|---|
Use Scenario: Battery-powered handheld blood glucose meter with 16-bit ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096V reference for ADC full-scale range. Use Value: 0.2% initial accuracy and 64μVRMS noise ensure <±0.5 LSB total error without calibration. |
Use Scenario: Remote environmental monitor logging temperature/humidity over 5 years on Li-SOCl₂ battery. IC Role / Device Role / Timing Role: Precision voltage reference for sensor front-end amplifiers and ADC biasing. Use Value: 60μA min operating current extends battery life; 120ppm long-term stability avoids recalibration. |
| Automotive Cabin Control Units | Test & Measurement Equipment |
Use Scenario: HVAC control module requiring stable reference across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Two-terminal shunt reference for microcontroller ADC and analog comparators. Use Value: Guaranteed 100ppm/°C tempco and -40°C to +85°C rating eliminate thermal drift compensation circuitry. |
Use Scenario: Benchtop multimeter with 5½-digit resolution and auto-ranging capability. IC Role / Device Role / Timing Role: Primary reference source for internal DACs and calibration circuitry. Use Value: Laser-trimmed 0.2% accuracy and low dynamic impedance enable traceable 0.005% measurement uncertainty. |
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; 3-pin SOT23; requires external resistors for 4.096V setting. | Used where programmability or higher voltage flexibility is needed; less accurate and noisier (120μVRMS). | Select TLVH431ACDBVR only if adjustable output or wider voltage range justifies added resistor network and reduced precision. |
| ADR3440ARJZ-R7 | Fixed 4.096V; 0.1% initial accuracy; 3-pin SOT23; series (not shunt) topology; requires input supply and bypass cap. | Suitable for low-noise, high-PSRR applications where supply rail is available; incompatible with shunt-only topologies. | Choose ADR3440ARJZ-R7 when PSRR >80dB and supply headroom permits series regulator use-avoid in shunt-based designs. |
Compared with TLVH431ACDBVR and ADR3440ARJZ-R7, the LM4040BIM3-4.1+T uniquely combines fixed 4.096V output, two-terminal simplicity, ultra-low quiescent current, and SC70 size-making it optimal for space-constrained, battery-operated shunt reference applications where external components must be minimized.
Availability
LM4040BIM3-4.1+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, automotive cabin control units, and test & measurement equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4040BIM3-4.1+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 (now part of Analog Devices) designs precision analog and mixed-signal ICs for demanding industrial, automotive, and medical applications, emphasizing low power, high accuracy, and robust packaging.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-sensitive systems where two-terminal simplicity, low noise, and guaranteed temperature performance are critical.
FAQ
What is the operating temperature range for the LM4040BIM3-4.1+T?
The LM4040BIM3-4.1+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) variant 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 parts.
Can the LM4040BIM3-4.1+T be used with capacitive loads without instability?
Yes-the LM4040BIM3-4.1+T is explicitly designed to remain stable with any capacitive load, including large bulk capacitors or long PCB traces. The datasheet states "No Output Capacitors Required" and "Tolerates Capacitive Loads" as key features, and stability is guaranteed across its full 60μA–15mA operating current range without external compensation.
What is the minimum shunt current required for regulation in the LM4040BIM3-4.1+T?
The LM4040BIM3-4.1+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 version under "Minimum Operating Current". This value increases slightly at temperature extremes but remains within the 60μA–15mA operational window defined for the device family.
Is pin 3 of the LM4040BIM3-4.1+T functional or should it be left unconnected?
Pin 3 of the LM4040BIM3-4.1+T is labeled "N.C." (No Connection) in the Pin Description and Pin Configuration diagrams. The datasheet explicitly states: "PIN 3 MUST BE LEFT UNCONNECTED OR CONNECTED TO PIN 2." It is not functional and must never be driven or used as a signal path.
How does the LM4040BIM3-4.1+T compare to the LM4040AIM3-4.1+T in terms of accuracy?
The LM4040BIM3-4.1+T has 0.2% initial accuracy (B-grade), whereas the LM4040AIM3-4.1+T offers 0.1% (A-grade). Both share identical 4.096V nominal output, SC70-3 package, and -40°C to +85°C temperature range-but the A-grade part provides tighter tolerance at +25°C and lower over-temperature drift, making it suitable for higher-precision applications where calibration overhead must be minimized.
LM4040BIM3-4.1+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):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BIM3-4.1+T FAQ
1.How can I place an order for LM4040BIM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-4.1+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 LM4040BIM3-4.1+T reliable?
The price and inventory of LM4040BIM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-4.1+T?
LM4040BIM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-4.1+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 LM4040BIM3-4.1+T?
For technical support, including LM4040BIM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-4.1+T requirements.
6.How does Aetrix verify that LM4040BIM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-4.1+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 LM4040BIM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-4.1+T?
All LM4040BIM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-4.1+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 LM4040BIM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040BIM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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