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Texas Instruments LM4040BIM3-8.2/NOPB
- Part No.:
- LM4040BIM3-8.2/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-8.2/NOPB.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,706
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Product details
Overview
LM4040BIM3-8.2/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 8.2 V reverse breakdown voltage with ±0.2% initial tolerance (B grade) at 25°C, 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 91 μA to 15 mA over −40°C to +85°C and requires no output capacitor.
For engineers reviewing the LM4040BIM3-8.2/NOPB datasheet, LM4040BIM3-8.2/NOPB pinout, LM4040BIM3-8.2/NOPB application, or LM4040BIM3-8.2/NOPB equivalent, key selection criteria include shunt reference stability under capacitive loads, low operating current headroom for battery-powered systems, tight voltage tolerance across industrial temperature range, and compatibility with space-constrained PCB layouts using SOT-23 footprint.
Technical Context
The LM4040BIM3-8.2/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.2% initial accuracy and integrates bandgap-derived curvature correction for stable voltage drift. Its low dynamic impedance (0.3–0.8 Ω) ensures minimal output variation with load current changes from 91 μA to 15 mA.
Designed as a two-terminal shunt device, it functions by sinking excess current through its cathode to maintain precise 8.2 V across external load/resistor networks. It tolerates arbitrary capacitive loads without oscillation and exhibits thermal hysteresis of only 0.08% after cycling between −40°C and +125°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 8.2 V nominal reverse breakdown voltage, fixed and non-adjustable - sets reference level for ADCs, DACs, and analog comparators. |
| Initial Tolerance | ±0.2% at 25°C (B grade) - translates to ±16.4 mV absolute error, enabling high-resolution measurement systems. |
| Temp Coefficient | ≤100 ppm/°C - contributes ≤±65 mV drift over −40°C to +85°C, critical for stable operation in unregulated environments. |
| Operating Current | 91 μA min to 15 mA max - supports ultra-low-power sensor nodes and robust industrial signal conditioning. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes added uncertainty in precision data acquisition front-ends. |
| Dynamic Impedance | 0.3–0.8 Ω - maintains voltage regulation despite rapid load transients in closed-loop feedback circuits. |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, JEDEC standard footprint, rated for 306 mW power dissipation at 25°C ambient.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Shunt current input/output node - connects to supply rail; voltage develops across external series resistor to load. |
| Anode (Pin 2) | O | Ground reference terminal - must be connected to system ground to complete shunt path. |
| NC (Pin 3) | - | No-connect terminal - left floating or tied to anode per EMI mitigation guidance in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables immediate use in compact designs without stability-compensation components or layout overhead. |
| Capacitive load tolerance | Stable operation with any value of output capacitance - simplifies filtering in ADC reference inputs and sensor biasing. |
| Micropower operation | 91 μA minimum cathode current - extends battery life in portable instrumentation and wireless sensor nodes. |
| Industrial temperature range | −40°C to +85°C operation - qualified for deployment in factory automation, energy metering, and motor control enclosures. |
Applications
| Field Transmitters | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter with isolated analog front-end. IC Role / Device Role / Timing Role: Shunt reference providing stable 8.2 V excitation for bridge sensors and precision DAC output scaling. Use Value: ±0.2% initial tolerance and 100 ppm/°C TC ensure <0.1% full-scale error over field temperature extremes. | Use Scenario: Smart electricity meter with polyphase voltage/current sampling and metrology SoC. IC Role / Device Role / Timing Role: Reference source for 24-bit delta-sigma ADCs measuring grid voltage harmonics and RMS values. Use Value: 35 μVrms noise floor preserves ENOB > 20 bits in 10 kHz bandwidth measurements. |
| Data Acquisition | Analog Input Module |
Use Scenario: Modular PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple signals. IC Role / Device Role / Timing Role: Precision voltage reference for programmable gain instrumentation amplifier (PGIA) offset calibration and ADC reference switching. Use Value: Low dynamic impedance (0.3–0.8 Ω) prevents gain error shift during fast multiplexed channel scanning. | Use Scenario: DIN-rail mounted industrial I/O module converting 4–20 mA sensor outputs to digital CAN bus messages. IC Role / Device Role / Timing Role: Stable 8.2 V reference for op-amp-based current-to-voltage conversion and anti-aliasing filter biasing. Use Value: Micropower operation (91 μA min) allows direct derivation from loop power without auxiliary supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040CIM3-8.2/NOPB | ±0.5% initial tolerance (C grade), same 8.2 V, SOT-23 package, identical pinout | Lower accuracy requirement; acceptable where ±41 mV error is permissible | Select when cost sensitivity outweighs need for <±16.4 mV initial error. |
| TLVH431ACDBVR | Adjustable 1.24–18 V output via resistive divider; 0.5% initial tolerance; 3-pin SOT-23; higher 80 μA min cathode current | Requires external resistors; supports flexible voltage setting but adds component count and layout area | Choose when design requires multiple reference voltages or future voltage reconfiguration capability. |
Compared with LM4040CIM3-8.2/NOPB, the LM4040BIM3-8.2/NOPB delivers tighter initial accuracy at identical package and thermal performance; versus TLVH431ACDBVR, it offers fixed-voltage simplicity and lower noise but lacks adjustability - making it optimal for dedicated 8.2 V reference roles in space- and noise-sensitive systems.
Availability
LM4040BIM3-8.2/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure meters, and analog input modules requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
Supply support for LM4040BIM3-8.2/NOPB 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, embedded processing, and connectivity technologies, with decades of expertise in precision analog ICs and industrial-grade components.
The LM4040-N series was engineered for space-constrained, high-accuracy applications demanding micropower shunt references - targeting industrial sensing, test equipment, and automotive subsystems where reliability and parametric consistency are critical.
FAQ
What is the minimum operating current for LM4040BIM3-8.2/NOPB?
The LM4040BIM3-8.2/NOPB requires a minimum cathode current of 91 μA at 25°C to maintain regulation within specification. This value increases slightly over temperature, reaching up to 97 μA at +85°C. Designers must ensure the series resistor and supply voltage provide sufficient headroom to sustain this current under all operating conditions, especially in low-power or battery-operated systems where current budget is constrained. The LM4040BIM3-8.2/NOPB will not regulate properly below this threshold.
Does LM4040BIM3-8.2/NOPB require an external capacitor for stability?
No, the LM4040BIM3-8.2/NOPB does not require an external output capacitor for stability - its internal design eliminates the need for such compensation. In fact, it is explicitly characterized to remain stable with arbitrary capacitive loads, including large bulk capacitors used for noise filtering in sensitive analog circuits. This feature simplifies layout, reduces BOM count, and improves reliability in applications like precision ADC reference supplies where LM4040BIM3-8.2/NOPB is commonly deployed.
What is the temperature coefficient specification for LM4040BIM3-8.2/NOPB?
The LM4040BIM3-8.2/NOPB has a maximum average temperature coefficient of 100 ppm/°C over the industrial temperature range (−40°C to +85°C). This means its output voltage may drift up to ±0.082 V across that full range - calculated as 8.2 V × 100 ppm/°C × 125°C ΔT. The coefficient is measured relative to the 25°C reference point and reflects worst-case curvature-corrected behavior, ensuring predictable performance in unregulated thermal environments where LM4040BIM3-8.2/NOPB is used as a system-level reference.
Can LM4040BIM3-8.2/NOPB be used in automotive applications?
The LM4040BIM3-8.2/NOPB is not AEC-Q100 qualified; it belongs to the standard LM4040-N family, not the LM4040-Q1 automotive variant. For automotive applications requiring extended temperature operation (−40°C to +125°C) and AEC-Q100 Grade 1 qualification, designers should select the LM4040BQIM3-8.2/NOPB instead. Using LM4040BIM3-8.2/NOPB in automotive contexts may compromise long-term reliability and compliance - always verify qualification status against the exact part number before integration into vehicle ECUs or ADAS subsystems.
What is the meaning of the 'NOPB' suffix in LM4040BIM3-8.2/NOPB?
The 'NOPB' suffix in LM4040BIM3-8.2/NOPB indicates lead-free (Pb-free) and RoHS-compliant packaging - specifically, matte tin (Sn) plating on the SOT-23 terminals with no lead content. This designation confirms compliance with environmental regulations including EU RoHS Directive 2011/65/EU and China RoHS, and ensures compatibility with standard Pb-free reflow soldering profiles. All LM4040BIM3-8.2/NOPB units shipped by Aetrix Electronics meet this specification, and the part remains functionally identical to legacy leaded versions except for finish composition.
LM4040BIM3-8.2/NOPB 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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 8.192V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.2%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 130µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 95 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040BIM3-8.2/NOPB FAQ
1.How can I place an order for LM4040BIM3-8.2/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-8.2/NOPB 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 LM4040BIM3-8.2/NOPB reliable?
The price and inventory of LM4040BIM3-8.2/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040BIM3-8.2/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-8.2/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-8.2/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-8.2/NOPB?
LM4040BIM3-8.2/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-8.2/NOPB 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 LM4040BIM3-8.2/NOPB?
For technical support, including LM4040BIM3-8.2/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-8.2/NOPB requirements.
6.How does Aetrix verify that LM4040BIM3-8.2/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-8.2/NOPB 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 LM4040BIM3-8.2/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-8.2/NOPB?
All LM4040BIM3-8.2/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-8.2/NOPB, 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 LM4040BIM3-8.2/NOPB part is unused and in its original packaging.
Return procedure for LM4040BIM3-8.2/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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