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Analog Devices Inc./Maxim Integrated LM4040BIX3-4.1+T
- Part No.:
- LM4040BIX3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040BIX3-4.1+T.pdf
- Description:
- IC VREF SHUNT 0.2% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,599
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Product details
Overview
LM4040BIX3-4.1+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 temperature coefficient, and 60μA to 15mA operating current range. It delivers stable reverse-breakdown voltage for ADC/DAC biasing, portable power monitoring, and industrial sensor excitation circuits.
For engineers reviewing the LM4040BIX3-4.1+T datasheet, LM4040BIX3-4.1+T pinout, LM4040BIX3-4.1+T application, or LM4040BIX3-4.1+T equivalent, key selection criteria include guaranteed -40°C to +85°C operation, no external capacitor requirement, low 64µVRMS wideband noise (10Hz–10kHz), and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4040BIX3-4.1+T uses bandgap-based shunt regulation to maintain a precise 4.096V reverse breakdown voltage across its cathode-anode terminals. Its laser-trimmed resistor network ensures 0.2% initial tolerance at +25°C, with overtemperature tolerance of ±0.85% across -40°C to +85°C.
It operates without external stabilization capacitance and tolerates any output capacitance while maintaining stability. Dynamic impedance remains ≤1.0Ω at 1mA, enabling accurate regulation under varying load currents from 60μA to 15mA across full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal reverse breakdown voltage - sets precise reference for 12-bit ADCs and digital power monitors. |
| Initial Accuracy | ±0.2% at +25°C - enables direct use in 10-bit systems without calibration. |
| Temp Coefficient | ±100ppm/°C max - contributes ≤±8.5mV drift over -40°C to +85°C ambient. |
| Operating Current | 60μA to 15mA - supports ultra-low-power sensor nodes and high-current reference buffering. |
| Wideband Noise | 64µVRMS (10Hz–10kHz) - minimizes quantization error in precision data acquisition. |
| Dynamic Impedance | ≤1.0Ω at 1mA - ensures <1mV output shift for 1mA load transients. |
| Long-Term Stability | 120ppm after 1000h - guarantees reference integrity in field-deployed instrumentation. |
Pinout & Package
LM4040BIX3-4.1+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 NC and must be left unconnected or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias input terminal - connects to supply rail via series resistor; sinks shunt current to regulate voltage. |
| 2 (–) | Anode | Reference ground node - forms output voltage between pins 1 and 2; ties to system ground or load return. |
| 3 (N.C.) | No Connection | Unused terminal - must remain floating or shorted to pin 2; no internal connection or function. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 package | 1.8mm × 1.8mm footprint - saves PCB area in wearables and compact IoT modules. |
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout constraints for decoupling. |
| Low 64µVRMS noise | Enables sub-12-bit effective resolution in battery-powered data loggers. |
| Guaranteed -40°C to +85°C operation | Validated performance across industrial ambient range without derating. |
| 60μA minimum operating current | Supports micropower applications such as coin-cell-powered sensors. |
Applications
| Portable Power Monitoring | Industrial Sensor Excitation |
|---|---|
Use Scenario: Measuring battery voltage in handheld test equipment using a 12-bit SAR ADC. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC VREF input, enabling full-scale resolution matching common 4.096V binary scaling. Use Value: Eliminates need for external trimming; ±0.2% accuracy ensures <1 LSB error at 12-bit resolution without calibration. | Use Scenario: Supplying excitation current to a 350Ω strain gauge bridge in factory-floor pressure transducers. IC Role / Device Role / Timing Role: Shunt reference establishes precise 4.096V node for constant-current source generation via op-amp feedback. Use Value: ±100ppm/°C tempco limits bridge output drift to <0.01% FS over operating temperature range. |
| Medical Wearable Sensors | Automotive Cabin Control |
Use Scenario: Biasing analog front-end of ECG signal conditioning circuit in patch-style monitor. IC Role / Device Role / Timing Role: Supplies low-noise 4.096V reference to instrumentation amplifier and ADC driver stages. Use Value: 64µVRMS noise prevents degradation of microvolt-level biopotential signals during digitization. | Use Scenario: Calibrating temperature-sensing thermistor networks in HVAC control modules. IC Role / Device Role / Timing Role: Reference voltage source for ratiometric ADC measurements compensating for supply rail variation. Use Value: No external capacitor simplifies layout in vibration-prone automotive environments; SC70 package withstands reflow profiles. |
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; higher 150ppm/°C tempco; SOT23-3 package. | Requires two external resistors for 4.096V setting; less accurate and noisier (120µVRMS). | Select when adjustable output or higher voltage capability is needed; not drop-in for fixed 4.096V use. |
| MAX6008BEUR+T | Fixed 4.096V; 0.2% accuracy; ±50ppm/°C tempco; SC70-3; but rated only to +85°C and higher 80µVRMS noise. | Same pinout and voltage, but inferior long-term stability (200ppm vs. 120ppm) and higher noise. | Acceptable where tighter tempco is critical but lower noise and stability are secondary. |
Compared with TLVH431ACDBVR and MAX6008BEUR+T, LM4040BIX3-4.1+T offers superior noise performance (64µVRMS), better long-term stability (120ppm), and identical SC70-3 footprint-making it optimal for high-resolution, space-constrained measurement systems requiring fixed 4.096V.
Availability
LM4040BIX3-4.1+T is available at Aetrix Electronics and suitable for portable power monitoring, industrial sensor excitation, medical wearable sensors, and automotive cabin control requiring stable component supply across extended temperature ranges.
Supply support for LM4040BIX3-4.1+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, medical, and communications applications.
The LM4040 product line delivers micropower, high-accuracy shunt references optimized for space-constrained, battery-operated, and high-reliability measurement systems requiring stable voltage references without external components.
FAQ
What is the guaranteed operating temperature range for LM4040BIX3-4.1+T?
The LM4040BIX3-4.1+T is specified and guaranteed over -40°C to +85°C ambient temperature. This range is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the official datasheet. The "I" grade designation in the part number explicitly denotes this industrial temperature range, distinct from the "E" grade (-40°C to +125°C). Operation outside this range may result in parametric deviation or reliability risk.
Does LM4040BIX3-4.1+T require an external output capacitor for stability?
No, LM4040BIX3-4.1+T does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including zero capacitance. This is explicitly stated in the General Description and Applications Information sections. Adding a capacitor does not improve stability but may be used for additional noise filtering if system-level requirements demand it.
What is the minimum shunt current required for LM4040BIX3-4.1+T to maintain regulation?
The LM4040BIX3-4.1+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 LM4040B grade. This value increases slightly at temperature extremes but remains within the 60µA–15mA operating range. Maintaining ≥73µA ensures the device stays in reverse breakdown and delivers its specified 4.096V output.
How does the 0.2% initial accuracy of LM4040BIX3-4.1+T translate to absolute voltage tolerance at 4.096V?
The 0.2% initial accuracy of LM4040BIX3-4.1+T corresponds to ±8.2mV tolerance around the nominal 4.096V output, resulting in a guaranteed range of 4.088V to 4.104V at +25°C. This is derived directly from the Electrical Characteristics table for the 4.096V variant and LM4040B grade. Over temperature, total tolerance expands to ±0.85% (±34.8mV) due to combined initial error and ±100ppm/°C tempco.
Can pin 3 of LM4040BIX3-4.1+T be left floating or must it be grounded?
Pin 3 of LM4040BIX3-4.1+T is designated N.C. (No Connection) and must either be left unconnected or tied to pin 2 (anode). The datasheet explicitly states "PIN 3 MUST BE LEFT UNCONNECTED OR CONNECTED TO PIN 2" in the Pin Configuration diagram. Connecting pin 3 to any other node-including VCC or signal lines-may cause malfunction or damage, as it has no internal connection and is not electrically isolated.
LM4040BIX3-4.1+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:
- ±0.2%
- 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040BIX3-4.1+T FAQ
1.How can I place an order for LM4040BIX3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIX3-4.1+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 LM4040BIX3-4.1+T reliable?
The price and inventory of LM4040BIX3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIX3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040BIX3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIX3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIX3-4.1+T?
LM4040BIX3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIX3-4.1+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 LM4040BIX3-4.1+T?
For technical support, including LM4040BIX3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIX3-4.1+T requirements.
6.How does Aetrix verify that LM4040BIX3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040BIX3-4.1+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 LM4040BIX3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040BIX3-4.1+T?
All LM4040BIX3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIX3-4.1+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 LM4040BIX3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040BIX3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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