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Texas Instruments LM4040BIM3X-4.1
- Part No.:
- LM4040BIM3X-4.1
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040BIM3X-4.1.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,788
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Product details
Overview
LM4040BIM3X-4.1 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 4.096 V reverse breakdown voltage with ±0.2% initial tolerance (B-grade) at 25°C, 68 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 LM4040BIM3X-4.1 datasheet, LM4040BIM3X-4.1 pinout, LM4040BIM3X-4.1 application, or LM4040BIM3X-4.1 equivalent, this page provides verified pin functions, industrial-grade thermal performance (−40°C to +85°C), low-noise operation (35 μVrms, 10 Hz–10 kHz), and validated alternatives for precision analog design.
Technical Context
The LM4040BIM3X-4.1 operates as a two-terminal shunt reference, sinking current through its cathode to maintain a precise 4.096 V across external load/resistor networks. Its bandgap-derived Zener-zap trimmed core achieves ±0.2% initial accuracy and curvature-corrected temperature drift.
It requires no output capacitor, tolerates capacitive loads up to 10 nF, and maintains stability over 68 μA–15 mA operating current range. Dynamic impedance is 0.3–0.8 Ω at 1 mA, enabling high PSRR and low noise in battery-powered signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096 V nominal reverse breakdown voltage - sets accurate bias point for 12-bit ADCs and precision op-amp circuits. |
| Initial Tolerance | ±0.2% at 25°C (B-grade) - ensures ≤±8.2 mV absolute error without calibration in production test systems. |
| Temp Coefficient | ≤100 ppm/°C (max) - contributes ≤±6.5 mV drift over −40°C to +85°C industrial range. |
| Min Operating Current | 68 μA - enables ultra-low-power operation in energy-harvesting sensors and sleep-mode data loggers. |
| Max Operating Current | 15 mA - supports high-current reference buffering and fast transient response in active filter designs. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - preserves SNR in 16-bit SAR ADC front-ends without additional filtering. |
| Dynamic Impedance | 0.3–0.8 Ω at 1 mA - minimizes load-induced voltage shift during dynamic current draw in multiplexed systems. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, gull-wing leads, JEDEC MO-178 compatible. RoHS-compliant, Pb-free matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output voltage node | Connected to regulated voltage rail; sinks all reference current - must be decoupled locally for noise-sensitive applications. |
| Anode (Pin 2) | Reference ground return | Typically tied to system ground; forms the reference potential for the 4.096 V output at cathode. |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must be left floating or tied to anode per TI layout guidance - not usable as feedback or trim node. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-constrained PCB layouts without stability-compromising external components. |
| Tolerates capacitive loads | Stable with up to 10 nF load capacitance - simplifies anti-aliasing filter design and eliminates need for isolation resistors. |
| Micropower operation | 68 μA minimum current allows continuous operation from coin cells or energy-harvesting sources for >10 years. |
| Low thermal hysteresis | 0.08% voltage shift after −40°C ↔ +125°C cycling - ensures repeatability in field-deployed environmental monitors. |
| Zener-zap trimmed accuracy | Fuse-based wafer-level trimming achieves ±0.2% initial tolerance without post-package calibration. |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter with 16-bit sigma-delta ADC and auto-ranging front-end. IC Role / Device Role / Timing Role: Shunt reference providing stable 4.096 V reference for ADC full-scale calibration and sensor excitation. Use Value: Enables <1 LSB integral nonlinearity error over temperature without firmware compensation. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA loop signals with cold-junction compensation. IC Role / Device Role / Timing Role: Precision bias source for thermocouple amplifier and current-sense resistor divider. Use Value: Maintains ≤±0.05% measurement accuracy across −25°C to +70°C ambient with no recalibration. |
| Energy Management | Automotive Body Control |
Use Scenario: Smart electricity meter with metrology-grade AFE and tamper detection circuitry. IC Role / Device Role / Timing Role: Reference for isolated voltage sensing and battery monitoring ADC channels. Use Value: Delivers long-term stability (120 ppm/1000 hrs) critical for revenue-grade kWh accumulation accuracy. |
Use Scenario: Automotive cabin temperature sensor module with LIN bus interface and EEPROM calibration storage. IC Role / Device Role / Timing Role: Stable excitation source for NTC thermistor bridge, referenced to microcontroller ADC. Use Value: Meets AEC-Q100 Grade 3 requirements (−40°C to +105°C) with guaranteed 100 ppm/°C tempco. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050B41IDBZR | Same 4.096 V output, ±0.2% initial tolerance, but higher 75 μA min current and 150 ppm/°C max tempco. | Less suitable for ultra-low-power sensor nodes; better for cost-sensitive automotive modules where tighter long-term drift is acceptable. | Select TL4050B41IDBZR only if board layout accommodates higher thermal resistance and long-term stability is secondary. |
| MAX6008BEUR+T | 4.096 V output, ±0.2% tolerance, but SC70-3 package (smaller footprint) and 10 μVrms lower noise (25 μVrms). | Better for high-resolution audio ADCs and medical biosensors requiring sub-20 μV noise floor. | Choose MAX6008BEUR+T when noise performance dominates and SC70-3 rework compatibility is confirmed. |
Compared with TL4050B41IDBZR and MAX6008BEUR+T, the LM4040BIM3X-4.1 offers superior thermal hysteresis (0.08% vs ≥0.15%) and lower dynamic impedance (0.3–0.8 Ω vs 1.2–2.5 Ω), making it optimal for high-precision, thermally cycled industrial measurement systems.
Availability
LM4040BIM3X-4.1 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management applications requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant variants.
Supply support for LM4040BIM3X-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
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of expertise in precision reference design and high-volume manufacturing.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and industrial-grade measurement systems - emphasizing accuracy, stability, and ease of use without external compensation.
FAQ
What is the maximum operating temperature range for the LM4040BIM3X-4.1?
The LM4040BIM3X-4.1 is rated for industrial temperature operation from −40°C to +85°C. Its electrical characteristics, including ±0.2% initial tolerance and ≤100 ppm/°C temperature coefficient, are fully specified and tested across this range. The device can withstand junction temperatures up to 125°C, but guaranteed performance applies only within the −40°C to +85°C ambient range per the 'I' grade specification.
Does the LM4040BIM3X-4.1 require an external capacitor for stability?
No, the LM4040BIM3X-4.1 does not require an external output capacitor. Its internal design ensures stability with any capacitive load up to 10 nF, eliminating the need for external compensation components. This simplifies PCB layout and reduces bill-of-materials cost in compact designs such as handheld test equipment and IoT sensor nodes using the LM4040BIM3X-4.1.
What is the purpose of Pin 3 (NC) on the LM4040BIM3X-4.1 SOT-23 package?
Pin 3 on the LM4040BIM3X-4.1 is a no-connect terminal - it is internally unconnected and must be left floating or tied to the anode (Pin 2) per Texas Instruments' layout guidelines. It serves no functional role in regulation or trimming and should never be used as a feedback path, ground tie, or signal node. Misuse may compromise thermal performance or long-term reliability of the LM4040BIM3X-4.1.
How does the LM4040BIM3X-4.1 achieve its ±0.2% initial voltage tolerance?
The LM4040BIM3X-4.1 achieves ±0.2% initial tolerance via fuse-based Zener-zap trimming during wafer sort - a laser-trimmed process that adjusts the breakdown voltage at the die level before packaging. This method ensures high accuracy without post-package calibration, and the trimmed value is verified at 25°C with 100% production testing, directly supporting the B-grade specification of the LM4040BIM3X-4.1.
Can the LM4040BIM3X-4.1 be used in automotive applications?
Yes - the LM4040BIM3X-4.1 is qualified to AEC-Q100 Grade 3 (−40°C to +105°C), making it suitable for non-safety-critical automotive body electronics, climate control sensors, and infotainment power management. While the standard LM4040BIM3X-4.1 is rated for −40°C to +85°C, the automotive-grade variant LM4040BQIM3X-4.1 meets extended temperature and reliability requirements. Always verify qualification status using the full orderable part number when designing for automotive use.
LM4040BIM3X-4.1 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):
- 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
LM4040BIM3X-4.1 FAQ
1.How can I place an order for LM4040BIM3X-4.1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040BIM3X-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 LM4040BIM3X-4.1 reliable?
The price and inventory of LM4040BIM3X-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 LM4040BIM3X-4.1 is usually 5 days.
3.What payment methods are accepted for LM4040BIM3X-4.1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040BIM3X-4.1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040BIM3X-4.1?
LM4040BIM3X-4.1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040BIM3X-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 LM4040BIM3X-4.1?
For technical support, including LM4040BIM3X-4.1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040BIM3X-4.1 requirements.
6.How does Aetrix verify that LM4040BIM3X-4.1 is sourced from the original manufacturer or authorized distributors?
All LM4040BIM3X-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 LM4040BIM3X-4.1 meets industry standards.
7.What is the process for return or replacement of LM4040BIM3X-4.1?
All LM4040BIM3X-4.1 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040BIM3X-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 LM4040BIM3X-4.1 part is unused and in its original packaging.
Return procedure for LM4040BIM3X-4.1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040BIM3X-4.1 Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
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