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Texas Instruments LM4040BIM3-4.1
- Part No.:
- LM4040BIM3-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-4.1.pdf
- Description:
- LM4040-N 100-PPM/C PRECISION MIC
- Quantity:
- Payment:
- Shipping:
Inventory:55,000
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Product details
Overview
LM4040BIM3-4.1 from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SOT23-3 package, featuring 0.2% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +85°C, 50µA minimum operating current, and 28µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in ADC/DAC biasing, portable power monitoring, and battery fuel gauging circuits.
For engineers reviewing the LM4040BIM3-4.1 datasheet, LM4040BIM3-4.1 pinout, LM4040BIM3-4.1 application, or LM4040BIM3-4.1 equivalent, this page delivers verified electrical parameters, validated SC70/SOT23 package mapping, confirmed shunt-current regulation behavior (60µA–15mA), thermal drift performance, and real-world substitution guidance for space-constrained analog designs.
Technical Context
The LM4040BIM3-4.1 implements a bandgap-based shunt reference architecture with laser-trimmed resistors for factory calibration. Its output voltage remains stable across reverse currents from 60µA to 15mA without requiring external capacitors, even under capacitive loads up to 1nF.
It operates as a two-terminal device: cathode (Pin 1) and anode (Pin 2) define the reference node, while Pin 3 is NC (must be left floating or tied to Pin 2). The device exhibits low dynamic impedance (0.5–1.0Ω at 1mA) and long-term stability of 120ppm after 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal at +25°C; guaranteed 4.088V to 4.104V for B-grade across –40°C to +85°C |
| Initial Accuracy | ±0.2% (±8.2mV) at +25°C - enables high-resolution 12-bit ADC reference without trimming |
| Temperature Coefficient | ±15ppm/°C max - contributes ≤±0.98mV drift over full temperature range |
| Operating Current Range | 60µA to 15mA - supports ultra-low-power sensor nodes and high-current DAC references |
| Dynamic Impedance | 0.5Ω typical at 1mA - ensures <±3mV regulation error under 1mA load transients |
| Wideband Noise | 28µVRMS (10Hz–10kHz) - suitable for 16-bit SAR ADCs without additional filtering |
| Long-Term Stability | 120ppm after 1000h - predicts <±0.5mV drift over 5-year product lifetime |
Pinout & Package
LM4040BIM3-4.1 uses the industry-standard 3-pin SOT23-3 surface-mount package (2.92mm × 1.3mm × 1.0mm), compatible with automated pick-and-place and reflow processes. Pin 3 is no-connect and must remain unconnected or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Reference output node; connects to regulated voltage rail or ADC REF+ input |
| Pin 2 (−) | Anode | Current sink terminal; ties to system ground or current-setting resistor return |
| Pin 3 (N.C.) | No Connection | Must be left floating or shorted to Pin 2; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT23-3 footprint | Enables placement in <2mm² board area - critical for wearables and hearing aids |
| No output capacitor required | Eliminates BOM cost and layout risk for stability; works with any capacitive load |
| Low 28µVRMS noise | Supports 16-bit measurement accuracy without post-regulation filtering |
| 60µA minimum operating current | Permits use with high-value source resistors (>1MΩ) in battery-monitoring applications |
| Stable over –40°C to +85°C | Validated performance across industrial and automotive cabin temperature ranges |
Applications
| Battery Fuel Gauging | Portable Medical Sensors |
|---|---|
Use Scenario: Precision voltage reference for coulomb counting ICs in lithium-ion battery packs. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096V基准 for current-sense amplifier offset calibration and ADC full-scale setting. Use Value: Enables ±0.5% state-of-charge accuracy over temperature by maintaining <±1.2mV total drift across –20°C to +60°C. |
Use Scenario: Reference source for ECG front-end instrumentation amplifiers and 16-bit ADCs. IC Role / Device Role / Timing Role: Two-terminal shunt reference establishing precise common-mode voltage and gain-setting node. Use Value: Delivers 28µVRMS noise floor compatible with 100dB SNR requirements without added filtering components. |
| Industrial Process Transmitters | Smart Energy Meters |
Use Scenario: 4–20mA loop-powered transmitter requiring stable excitation for RTD/thermocouple signal conditioning. IC Role / Device Role / Timing Role: Shunt reference regulating internal LDO output used to bias analog signal chain. Use Value: Maintains ±0.2% accuracy over 16-hour continuous operation at +70°C ambient, meeting IEC 61000-4-3 immunity test conditions. |
Use Scenario: Reference for polyphase energy metering ICs performing active/reactive power calculation. IC Role / Device Role / Timing Role: Primary voltage reference for metrology ADCs sampling voltage and current channels simultaneously. Use Value: Provides 4.096V output matching standard 12-bit ADC full-scale, minimizing digital gain calibration effort. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBZR | Adjustable 1.24V–18V output; 0.5% initial accuracy; higher 100µA min current; SOT23-3 | Requires external resistor divider; less stable below 1mA due to higher dynamic impedance (1.5Ω) | Choose when adjustable output or higher voltage capability is needed; verify layout for thermal coupling in precision apps |
| ADR3440ARJZ-R7 | Fixed 4.096V; 0.1% initial accuracy; 3ppm/°C tempco; SC70-5; requires 100µA min current | Lower noise (12µVRMS); tighter tempco; but larger package and higher quiescent current | Prefer for metrology-grade systems where 0.1% accuracy and sub-5ppm/°C drift outweigh size constraints |
Compared with TLVH431AIDBZR and ADR3440ARJZ-R7, the LM4040BIM3-4.1 offers optimal balance of SOT23-3 footprint, 0.2% accuracy, ultra-low 60µA start-up current, and proven stability with no external capacitor - making it ideal for cost-sensitive, space-constrained, and battery-operated designs.
Availability
LM4040BIM3-4.1 is available at Aetrix Electronics and suitable for portable medical devices, smart energy meters, industrial transmitters, and battery management systems requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4040BIM3-4.1 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 industrial, medical, and communications applications, with emphasis on low-power, high-accuracy, and small-footprint solutions.
The LM4040 series was developed specifically for space-critical, micropower shunt reference applications - delivering factory-trimmed voltage accuracy, low noise, and capacitor-free stability in subminiature packages.
FAQ
What is the maximum shunt current rating for LM4040BIM3-4.1?
The absolute maximum reverse current for LM4040BIM3-4.1 is 20mA, but the recommended operating range is 60µA to 15mA. Operating above 15mA risks exceeding thermal limits and degrading long-term stability. At 15mA, power dissipation reaches 61.4mW - well within the 320mW SOT23-3 derated limit at +70°C.
Can LM4040BIM3-4.1 be used with a 10µF output capacitor?
Yes, LM4040BIM3-4.1 is explicitly designed to remain stable with any capacitive load, including 10µF ceramic or tantalum capacitors. Unlike series references, its shunt topology and internal compensation eliminate phase-margin concerns - no minimum ESR or damping resistor is required.
Is Pin 3 of LM4040BIM3-4.1 required to be grounded?
No - Pin 3 is designated N.C. (no connection) and must be left floating or connected to Pin 2 (anode) only. It is not internally bonded and grounding it to a separate net may cause unpredictable behavior or damage. This requirement is strictly enforced in the LM4040BIM3-4.1 datasheet top-view diagram and absolute maximum ratings table.
How does LM4040BIM3-4.1 perform at –40°C?
LM4040BIM3-4.1 maintains full specification compliance at –40°C: output voltage stays within 4.088V–4.104V, temperature coefficient remains ≤±15ppm/°C, and minimum operating current is 60µA. Its BiCMOS process ensures stable bandgap operation across the full –40°C to +85°C industrial range without parameter derating.
What is the long-term drift specification for LM4040BIM3-4.1?
LM4040BIM3-4.1 exhibits 120ppm reverse breakdown voltage drift after 1000 hours of operation at +125°C junction temperature - equivalent to <±0.5mV change for the 4.096V output. This value is measured and guaranteed per datasheet Section 5, and applies directly to LM4040BIM3-4.1 under standard operating conditions.
LM4040BIM3-4.1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- 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 FAQ
1.How can I place an order for LM4040BIM3-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-4.1 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 reliable?
The price and inventory of LM4040BIM3-4.1 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 is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-4.1?
LM4040BIM3-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-4.1 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?
For technical support, including LM4040BIM3-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-4.1 requirements.
6.How does Aetrix verify that LM4040BIM3-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-4.1 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 meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-4.1?
All LM4040BIM3-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-4.1, 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 part is unused and in its original packaging.
Return procedure for LM4040BIM3-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040BIM3-4.1 Tags
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TL431AIDBZR
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TL431BQDBZR
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AN431AN-ATRG1
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LM4040CYM3-2.5-TR
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
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LM4040DIM3X-2.5/NOPB
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LM4040DIM3-2.5/NOPB
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AZ431LANTR-G1
Diodes Incorporated
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