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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:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:12,500
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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 for stability-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, this page provides verified electrical specifications, thermal performance across –40°C to +125°C, SC70-3 footprint compatibility, and validated alternatives for space-constrained, battery-powered designs requiring tight voltage reference tolerance.
Technical Context
The LM4040BIM3-4.1-T uses bandgap-based shunt regulation to maintain a precise 4.096V reverse breakdown voltage across its cathode-anode terminals. Its laser-trimmed internal resistor network ensures ±0.2% initial accuracy at +25°C, with guaranteed performance over –40°C to +125°C.
It operates as a two-terminal device: reverse current (cathode to anode) between 60μA and 15mA sustains regulation, while forward current up to 10mA is tolerated. Dynamic impedance remains ≤1.0Ω at 1mA, enabling stable output under varying load conditions without external capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±8.2mV (±0.2%) initial tolerance at +25°C - enables direct interface with 12-bit ADCs requiring <0.5 LSB error. |
| Temperature Coefficient | ≤100ppm/°C - ensures ≤±41.8mV drift over –40°C to +125°C, critical for industrial sensor signal chains. |
| Shunt Current Range | 60μA to 15mA - supports ultra-low-power sleep modes and high-current regulation without external components. |
| Wideband Noise | 64µVRMS (10Hz–10kHz) - minimizes quantization noise in precision data acquisition systems. |
| Dynamic Impedance | ≤1.0Ω at 1mA - maintains voltage stability during fast load transients in microcontroller reference rails. |
| Long-Term Stability | 120ppm after 1000 hours - ensures calibration integrity in medical and test equipment with multi-year service life. |
Pinout & Package
The LM4040BIM3-4.1-T is housed in a 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias input terminal; connects to higher-potential supply node in shunt configuration. |
| 2 (–) | Anode | Reference ground terminal; common return path for shunt and load currents. |
| 3 (N.C.) | No Connection | Internally unconnected; must not be used for routing or thermal relief to avoid parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area - saves PCB space in wearables and compact IoT sensor nodes. |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout risk from external stabilization caps. |
| Guaranteed operation to +125°C | Rated for extended temperature range - suitable for under-hood automotive modules and industrial PLCs. |
| Low micropower quiescent current | 60μA minimum operating current - enables battery life extension in always-on monitoring devices. |
| Tolerates capacitive loads | Stable with >0pF output capacitance - simplifies integration into noisy switching power supply environments. |
Applications
| Portable Instrumentation | Industrial Data Acquisition |
|---|---|
Use Scenario: Handheld multimeter using 12-bit SAR ADC with single-supply rail. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC full-scale calibration. Use Value: Enables ±0.2% absolute measurement accuracy across temperature without recalibration. |
Use Scenario: 4–20mA loop-powered transmitter with onboard analog front-end. IC Role / Device Role / Timing Role: Supplies precision bias for current-sense amplifier and DAC feedback path. Use Value: Maintains 0.1% span accuracy over –40°C to +85°C ambient, meeting IEC 61000-6-2 immunity requirements. |
| Medical Vital Sign Monitors | Automotive Cabin Sensors |
Use Scenario: ECG front-end with low-noise instrumentation amplifier and 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Low-noise 4.096V reference for ADC VREF and PGA gain-setting resistors. Use Value: 64µVRMS noise contributes <0.05% of full-scale noise floor, preserving SNR >85dB. |
Use Scenario: Occupancy detection module with MEMS accelerometer and microcontroller. IC Role / Device Role / Timing Role: Reference source for MCU's internal ADC measuring thermistor voltage. Use Value: ±0.2% accuracy ensures <±0.5°C temperature reading error across vehicle cabin operating range. |
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 TC; SOT23-3 package. | Requires two external resistors for 4.096V setting; higher minimum cathode current (80μA). | Choose when design flexibility for multiple reference voltages is needed; verify resistor tolerance impact on accuracy. |
| ADR3440ARJZ-R7 | Fixed 4.096V; 0.1% initial accuracy; 30ppm/°C TC; SC70-5 package with enable pin. | Three-terminal series reference; requires separate supply and ground pins; not pin-compatible. | Choose when ultra-low TC and higher accuracy justify added pin count and layout revision. |
Compared with TLVH431ACDBVR and ADR3440ARJZ-R7, the LM4040BIM3-4.1-T offers true two-terminal simplicity and SC70-3 footprint efficiency, making it optimal for space-constrained, fixed-voltage shunt reference roles where ±0.2% accuracy and 100ppm/°C TC meet system requirements without adjustment complexity or extra pins.
Availability
LM4040BIM3-4.1-T is available at Aetrix Electronics and suitable for portable instrumentation, industrial data acquisition, and medical vital sign monitors requiring stable component supply with consistent parametric performance and RoHS-compliant packaging.
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 designs precision analog and mixed-signal semiconductor solutions for industrial, medical, communications, and consumer applications, emphasizing high reliability and small-footprint integration.
The LM4040 product line delivers micropower shunt voltage references optimized for space-critical, battery-operated systems needing stable, accurate, and capacitor-free voltage references across extended temperature ranges.
FAQ
What is the maximum operating temperature range for the LM4040BIM3-4.1-T?
The LM4040BIM3-4.1-T is rated for operation from –40°C to +125°C, matching the LM4040_E grade specification. This extended range is validated across all electrical parameters including reverse breakdown voltage, temperature coefficient, and dynamic impedance - making LM4040BIM3-4.1-T suitable for under-hood automotive and industrial control environments where ambient temperatures exceed +85°C.
Does the LM4040BIM3-4.1-T require an external output capacitor?
No, the LM4040BIM3-4.1-T does not require an external output capacitor for stability. Its internal architecture ensures unconditional stability with any capacitive load, including zero capacitance. This eliminates BOM cost, board area, and potential phase-margin risks associated with capacitor selection - a key advantage over many series references and older shunt designs.
What is the minimum shunt current needed for regulation in the LM4040BIM3-4.1-T?
The LM4040BIM3-4.1-T requires a minimum shunt current of 60μA to maintain regulation at 4.096V. This value is guaranteed across the full –40°C to +125°C temperature range and accounts for worst-case initial accuracy and temperature coefficient. Operating below 60μA may result in output voltage droop or loss of regulation.
How does the LM4040BIM3-4.1-T compare to the LM4040AIM3-4.1-T in accuracy?
The LM4040BIM3-4.1-T has ±0.2% initial accuracy (±8.2mV at 4.096V), while the LM4040AIM3-4.1-T offers tighter ±0.1% (±4.1mV). Both share identical 100ppm/°C temperature coefficient and SC70-3 package. Choose LM4040BIM3-4.1-T when ±0.2% meets system budget and cost sensitivity outweighs the 0.1% accuracy gain of the 'A' grade.
Can the LM4040BIM3-4.1-T be used in forward conduction mode?
Yes, the LM4040BIM3-4.1-T tolerates forward current up to 10mA (anode to cathode), behaving like a standard silicon diode in that mode. However, forward conduction is not a functional operating mode for voltage reference use - it is only specified for survivability during reverse polarity events or transient fault conditions, not for sustained forward-bias operation.
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:
- Bulk
- 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:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- 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.
LM4040BIM3-4.1-T Tags
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