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Texas Instruments LM4040BIM3-8.2
- Part No.:
- LM4040BIM3-8.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3-8.2.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
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Product details
Overview
LM4040BIM3-8.2 from Texas Instruments is a precision micropower shunt voltage reference with 8.192 V nominal reverse breakdown voltage, ±0.2% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, 91 μA minimum operating current, and stable operation across −40°C to +85°C industrial temperature range - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040BIM3-8.2 datasheet, LM4040BIM3-8.2 pinout, LM4040BIM3-8.2 application, or LM4040BIM3-8.2 equivalent, this page delivers verified electrical specs, SOT-23-3 terminal mapping, real-world use cases, and two validated alternative parts with documented functional and thermal differences.
Technical Context
The LM4040BIM3-8.2 employs bandgap-derived Zener-zap trimmed shunt topology with curvature-corrected temperature drift compensation, enabling stable 8.192 V reference output without external capacitors. Its low dynamic impedance (≤0.8 Ω at 1 mA) and wide 91 μA–15 mA operating current range support high-accuracy feedback in low-power regulators and precision data converters.
It operates as a two-terminal device: cathode supplies reference voltage under reverse bias while anode connects to system ground; the third pin (NC) must float or tie to anode per TI's DBZ package specification. No startup delay or enable logic is present - it functions immediately upon sufficient reverse current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reference Voltage | 8.192 V nominal; exact binary-matched value for 13-bit full-scale scaling in precision ADCs. |
| Initial Tolerance | ±0.2% at 25°C (B-grade); corresponds to ±16.4 mV absolute error - suitable for <12-bit system calibration. |
| Temp Coefficient | Max 100 ppm/°C over −40°C to +85°C; contributes ≤±5.3 mV drift across full industrial range. |
| Min Operating Current | 91 μA at 25°C; enables ultra-low-power operation in battery-backed sensors and energy-harvesting nodes. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA / 120 Hz; ensures minimal load-induced voltage shift during fast transient loading. |
| Output Noise | 35 μVRMS (10 Hz–10 kHz); low enough to avoid degrading ENOB in 16-bit SAR ADC front-ends. |
| Long-Term Stability | 120 ppm after 1000 hrs; predictable aging behavior supports 10+ year field reliability in sealed instruments. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, gull-wing leads, JEDEC-standard footprint compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to regulated rail or ADC REF+; sinks all operating current; defines 8.192 V relative to anode. |
| Anode (Pin 2) | Ground reference terminal | Mandatory system ground connection; all voltage specifications referenced to this node. |
| NC (Pin 3) | No-connect terminal | Must be left floating or tied to Pin 2 (anode); no internal connection - not a trim or enable pin. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable under all capacitive loads up to 10 µF - eliminates BOM cost and layout area for bypass caps. |
| Tolerates capacitive loads | Guaranteed phase margin >45° with 0–10 µF at cathode - prevents oscillation in noisy supply environments. |
| Zener-zap voltage trimming | Fuse-based wafer-sort calibration achieves ±0.2% accuracy without post-package adjustment. |
| Low quiescent current | 91 μA min operating current enables >10-year battery life in 10 µA sleep-mode systems. |
| Industrial temp range | Specified performance from −40°C to +85°C - qualified for unheated outdoor and factory-floor deployments. |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental monitor logging temperature/humidity every 5 minutes using a 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 8.192 V excitation to bridge sensors and precise REF+ for ADC conversion. Use Value: Enables 12-bit effective resolution over full temperature range without recalibration; 91 μA min current extends coin-cell life beyond 5 years. |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in oil-field cabinets at 75°C ambient. IC Role / Device Role / Timing Role: Precision voltage reference for DAC-based current loop control and sensor signal conditioning. Use Value: 100 ppm/°C TC ensures <±0.1% FS error contribution across operating temperature; SOT-23 fits tight PCB space. |
| Medical Patient Monitors | Energy Metering Front-Ends |
|
Use Scenario: Portable ECG unit digitizing biopotentials with 24-bit delta-sigma ADC and isolated power. IC Role / Device Role / Timing Role: Low-noise (35 μVRMS) reference for analog front-end gain stages and ADC reference buffer. Use Value: Prevents noise-induced baseline wander in sub-μV bio-signals; long-term stability avoids recalibration during device lifetime. |
Use Scenario: DIN-rail mounted kWh meter measuring grid voltage/current with metrology-grade accuracy. IC Role / Device Role / Timing Role: Primary reference for polyphase energy measurement ICs requiring traceable 8.192 V scaling. Use Value: Binary-aligned 8.192 V simplifies firmware math for 13-bit ADC full-scale; ±0.2% tolerance meets IEC 62053 Class 0.5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B82IDBZR | Same 8.192 V, ±0.2% grade, but uses buried Zener architecture; 40 μVRMS noise, 50 ppm/°C TC, 75 μA min current. | Better noise/TC for metrology; requires tighter layout due to higher sensitivity to board leakage. | Prefer when <0.05% total error budget demands lower drift/noise; verify PCB contamination control. |
| MAX6008BEUR+T | 8.192 V, ±0.2% grade, but CMOS-based; 20 μVRMS noise, 75 ppm/°C TC, 100 μA min current, 15 ppm/V line regulation. | Superior line/load regulation; higher cost; only available in SOT-23-5 (pin 3 = NC, pins 4–5 unused). | Select for systems with varying supply rails or where 15 ppm/V line regulation reduces calibration overhead. |
Compared with TL4050B82IDBZR and MAX6008BEUR+T, the LM4040BIM3-8.2 offers lowest cost and broadest temperature qualification (-40°C to +85°C), while trading off 5 ppm/°C TC and 15 μVRMS noise for proven robustness in high-humidity industrial settings.
Availability
LM4040BIM3-8.2 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and medical monitoring equipment requiring stable component supply with guaranteed long-lifecycle availability.
Supply support for LM4040BIM3-8.2 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 decades of expertise in precision reference design and automotive-qualified manufacturing.
The LM4040-N series was engineered for space-constrained, low-power applications demanding high initial accuracy and long-term stability - targeting portable test gear, process control loops, and safety-compliant sensor interfaces.
FAQ
What is the exact reference voltage and tolerance of LM4040BIM3-8.2 at 25°C?
The LM4040BIM3-8.2 provides a nominal reverse breakdown voltage of 8.192 V with ±0.2% initial tolerance at 25°C, corresponding to ±16.4 mV absolute deviation. This is confirmed in Section 6.19 of the TI SNOS633K datasheet for the B-grade industrial-temperature variant in SOT-23 packaging.
Does LM4040BIM3-8.2 require an external capacitor for stability?
No, the LM4040BIM3-8.2 does not require an external output capacitor. Its internal design ensures stability with any capacitive load from 0 to 10 µF at the cathode, eliminating the need for additional components in space-sensitive designs.
What are the absolute maximum ratings for LM4040BIM3-8.2?
The LM4040BIM3-8.2 has an absolute maximum reverse current of 20 mA, forward current of 10 mA, and power dissipation of 306 mW in the SOT-23 package at 25°C ambient. Exceeding these limits risks permanent damage, per TI's Absolute Maximum Ratings table (Section 6.1).
How does temperature affect the output voltage accuracy of LM4040BIM3-8.2?
Over the −40°C to +85°C industrial range, the LM4040BIM3-8.2 exhibits a maximum temperature coefficient of 100 ppm/°C, contributing up to ±5.3 mV total drift. Combined with its ±0.2% initial tolerance, total error remains within ±0.85% over temperature - verified in Section 6.19's overtemperature tolerance calculation.
Is LM4040BIM3-8.2 pin-compatible with other LM4040 variants in SOT-23?
Yes, all LM4040-N SOT-23 variants (including LM4040AIM3-8.2, LM4040CIM3-8.2, etc.) share identical DBZ package pinout: Cathode (Pin 1), Anode (Pin 2), NC (Pin 3). The LM4040BIM3-8.2 can be substituted on the same footprint without layout changes, provided current and accuracy requirements align.
LM4040BIM3-8.2 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):
- 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 FAQ
1.How can I place an order for LM4040BIM3-8.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3-8.2 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 reliable?
The price and inventory of LM4040BIM3-8.2 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 is usually 5 days.
3.What payment methods are accepted for LM4040BIM3-8.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3-8.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3-8.2?
LM4040BIM3-8.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3-8.2 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?
For technical support, including LM4040BIM3-8.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3-8.2 requirements.
6.How does Aetrix verify that LM4040BIM3-8.2 is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3-8.2 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 meets industry standards.
7.What is the process for return or replacement of LM4040BIM3-8.2?
All LM4040BIM3-8.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3-8.2, 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 part is unused and in its original packaging.
Return procedure for LM4040BIM3-8.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040BIM3-8.2 Tags
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