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Texas Instruments LM4040BIM3-10.0
- Part No.:
- LM4040BIM3-10.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-10.0.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:515
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Product details
Overview
LM4040BIM3-10.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 10.0 V reverse breakdown voltage with ±0.2% initial tolerance (B-grade) at 25°C, 100 μA minimum operating current, and 100 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040BIM3-10.0 datasheet, LM4040BIM3-10.0 pinout, LM4040BIM3-10.0 application, or LM4040BIM3-10.0 equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), low 35 μVrms wideband noise (10 Hz–10 kHz), no-output-capacitor operation, and compatibility with capacitive loads up to 10 nF.
Technical Context
The LM4040BIM3-10.0 uses a Zener-zap trimmed bandgap reference architecture with curvature-corrected temperature drift compensation, enabling stable 10.0 V output across −40°C to +85°C without external components. Its low dynamic impedance (≤0.9 Ω at 1 mA) ensures minimal load regulation error under varying sink current (100 μA–15 mA).
It operates as a two-terminal shunt device: cathode accepts input current and delivers regulated voltage referenced to anode (ground), with NC pin (Pin 3) internally unconnected and requiring floating or connection to anode per TI's DBZ package specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 10.0 V nominal reverse breakdown voltage, fixed and non-adjustable - sets precise reference level for analog signal chains. |
| Initial Tolerance | ±0.2% at 25°C (B-grade) - corresponds to ±20 mV absolute error, enabling high-resolution 16-bit+ data acquisition calibration. |
| Temp Coefficient | Max 100 ppm/°C over −40°C to +85°C - contributes ≤±0.65% total drift across industrial range, critical for stable sensor bridges. |
| Operating Current | 100 μA min / 15 mA max - supports ultra-low-power battery operation while maintaining regulation under heavy sink loads. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - low enough to avoid degrading ENOB in 16-bit SAR ADCs without additional filtering. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - ensures <1 mV output shift per 1 mA load change, simplifying current-source design in precision transmitters. |
| Long-Term Stability | 120 ppm after 1000 hrs - predictable aging behavior supports 10+ year field reliability in energy metering applications. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 0.95 mm height, gull-wing leads, JEDEC MO-178AC compliant. RoHS-compliant, Pb-free, halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage output node | Connected to supply rail via series resistor; sinks all excess current to maintain 10.0 V at this node relative to anode. |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines 0 V reference for regulated output - not floating. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; TI specifies it must be left floating or tied to Pin 2 (anode) - no routing or loading permitted. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-constrained PCB layouts without stability-compensation components. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - eliminates need for isolation resistors in ADC reference buffering. |
| Micropower operation | 100 μA minimum current enables >10-year battery life in wireless sensor nodes using coin-cell sources. |
| Industrial temperature range | Specified performance from −40°C to +85°C - suitable for outdoor metering, factory automation, and automotive cabin modules. |
| Low thermal hysteresis | 0.08% voltage shift after −40°C ↔ +125°C thermal cycling - preserves calibration integrity across repeated environmental stress. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental monitoring node measuring temperature, humidity, and pressure with 16-bit ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 10.0 V excitation for ratiometric bridge sensors and reference voltage for ADC conversion. Use Value: Enables ±0.05% full-scale measurement accuracy over temperature without recalibration, extending field service intervals. |
Use Scenario: 4–20 mA loop-powered transmitter conditioning RTD and thermocouple signals in factory PLC I/O modules. IC Role / Device Role / Timing Role: Precision voltage reference for analog front-end gain/offset trimming and DAC output scaling. Use Value: Maintains <±0.1% span error over 20-year product lifecycle, meeting IEC 61000-4-3 immunity requirements. |
| Energy Meter Reference | Automotive Cabin Sensors |
Use Scenario: Class 0.5 polyphase electricity meter requiring metrology-grade voltage reference for ADC sampling. IC Role / Device Role / Timing Role: Primary shunt reference for isolated sigma-delta ADCs measuring phase voltages and currents. Use Value: 35 μVrms noise and 100 ppm/°C TC ensure <0.02% metering error across −25°C to +70°C ambient. |
Use Scenario: Occupancy and air quality sensor module inside vehicle dashboard, powered from 12 V battery rail. IC Role / Device Role / Timing Role: Stable 10.0 V reference for MEMS accelerometer biasing and gas sensor heater control DAC. Use Value: Survives cold-crank (−40°C) and hot-soak (+85°C) conditions while maintaining sensor linearity within AEC-Q200 Grade 3 limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| REF43GM | 10.0 V, ±0.05% initial tolerance, 3 ppm/°C TC, SOIC-8 package, 400 μA quiescent current | Higher accuracy and lower drift, but larger footprint and higher power - suited for lab-grade instruments, not portable devices | Select REF43GM when long-term stability (<20 ppm/1000h) and sub-ppm/°C drift outweigh size/power constraints. |
| TL431CDBVR | Adjustable 2.5–36 V output, ±1% initial tolerance, SOT-23-5, 100 μA min current, 500 mV typical VKA | Programmable output requires two external resistors; less accurate and noisier (120 μVrms) than LM4040BIM3-10.0 | Choose TL431CDBVR only when output voltage flexibility justifies trade-offs in accuracy, noise, and board area. |
Compared with REF43GM and TL431CDBVR, the LM4040BIM3-10.0 uniquely balances SOT-23-3 compactness, micropower operation (100 μA min), and B-grade precision (±0.2%) - making it optimal for cost-sensitive, space-limited industrial and automotive sensing where fixed 10.0 V is acceptable.
Availability
LM4040BIM3-10.0 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and energy metering systems requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4040BIM3-10.0 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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with over 50 years of precision reference design heritage.
The LM4040 family was engineered for space-constrained, low-power analog systems needing factory-trimmed, capacitor-free voltage references - targeting portable test equipment, industrial IoT nodes, and automotive cabin electronics.
FAQ
What is the maximum operating current for LM4040BIM3-10.0?
The LM4040BIM3-10.0 supports a maximum operating current of 15 mA. This upper limit ensures stable regulation while preventing thermal overload in the SOT-23-3 package, where power dissipation must stay below 306 mW at 25°C ambient. Exceeding 15 mA risks exceeding the device's absolute maximum reverse current rating and may cause irreversible degradation of the Zener junction in LM4040BIM3-10.0.
Does LM4040BIM3-10.0 require an external capacitor for stability?
No, the LM4040BIM3-10.0 does not require an external output capacitor for stability. Its internal design eliminates the need for stabilization components, and it remains stable even with capacitive loads up to 10 nF. This feature simplifies layout and reduces BOM count - a key advantage confirmed in TI's LM4040BIM3-10.0 datasheet Section 3 and Figure 9-1.
What is the temperature coefficient specification for LM4040BIM3-10.0?
The LM4040BIM3-10.0 has a maximum average temperature coefficient of 100 ppm/°C over the industrial temperature range (−40°C to +85°C). This value is specified in the Electrical Characteristics table (Section 6.21) and directly impacts total voltage drift: for example, a 125°C ΔT yields ±12.5 mV deviation from nominal 10.0 V, which is fully accounted for in LM4040BIM3-10.0's overtemperature tolerance budget.
Can Pin 3 (NC) of LM4040BIM3-10.0 be left unconnected?
Yes, Pin 3 of LM4040BIM3-10.0 is a true no-connect terminal and may be left floating. However, Texas Instruments' datasheet explicitly permits connecting Pin 3 to Pin 2 (Anode) if mechanical or layout constraints require it - neither configuration affects electrical performance. This guidance appears in the Pin Functions table on page 5 of the LM4040BIM3-10.0 datasheet.
What is the wideband noise performance of LM4040BIM3-10.0?
The LM4040BIM3-10.0 delivers 35 μVrms wideband noise over the 10 Hz to 10 kHz bandwidth, measured at 100 μA operating current. This low-noise characteristic is critical for high-resolution data acquisition systems, as it avoids introducing quantization uncertainty in 16-bit+ ADCs - a value verified in TI's LM4040BIM3-10.0 Electrical Characteristics tables (Sections 6.5–6.21).
LM4040BIM3-10.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 10V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 180µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 103 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BIM3-10.0 FAQ
1.How can I place an order for LM4040BIM3-10.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-10.0 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 LM4040BIM3-10.0 reliable?
The price and inventory of LM4040BIM3-10.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIM3-10.0 is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-10.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-10.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-10.0?
LM4040BIM3-10.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-10.0 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 LM4040BIM3-10.0?
For technical support, including LM4040BIM3-10.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-10.0 requirements.
6.How does Aetrix verify that LM4040BIM3-10.0 is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-10.0 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 LM4040BIM3-10.0 meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-10.0?
All LM4040BIM3-10.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-10.0, 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 LM4040BIM3-10.0 part is unused and in its original packaging.
Return procedure for LM4040BIM3-10.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040BIM3-10.0 Tags
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