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Texas Instruments LM4040CIM3-3.0/NOPB
- Part No.:
- LM4040CIM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:34,752
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Product details
Overview
LM4040CIM3-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a stable 3.0 V reverse breakdown voltage with ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 62 μA to 15 mA over −40°C to +85°C and requires no output capacitor-ideal for space-constrained analog input modules and field transmitters.
For engineers reviewing the LM4040CIM3-3.0/NOPB datasheet, LM4040CIM3-3.0/NOPB pinout, LM4040CIM3-3.0/NOPB application, or LM4040CIM3-3.0/NOPB equivalent, key selection criteria include shunt reference accuracy at low current, thermal hysteresis (0.08%), dynamic impedance (≤0.9 Ω), long-term stability (120 ppm), and compatibility with capacitive loads without external compensation.
Technical Context
The LM4040CIM3-3.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and integrates bandgap-derived curvature correction for stable voltage over temperature. Its low dynamic impedance (0.3–0.9 Ω) and high PSRR enable precise regulation in noisy supply environments.
Designed as a two-terminal shunt device, it functions by sinking current through its cathode to maintain 3.0 V across an external load/resistor network. The SOT-23 package supports surface-mount assembly while enabling thermal performance up to 125°C junction temperature with appropriate PCB copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed |
| Initial Tolerance | ±0.5% at 25°C (C grade), corresponding to ±15 mV absolute error |
| Temp Coefficient | ≤100 ppm/°C max over −40°C to +85°C, limiting drift to ±6.5 mV across full range |
| Operating Current | 62 μA min to 15 mA max-supports ultra-low-power sensor biasing and high-current reference buffering |
| Noise (10Hz–10kHz) | 35 μVrms typical-enables high-resolution ADC reference without added filtering |
| Dynamic Impedance | 0.3–0.9 Ω at 1 mA-ensures minimal load-induced voltage shift in precision circuits |
| Long-Term Stability | 120 ppm after 1000 hrs-predictable aging behavior for industrial calibration systems |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, 1.45 mm height, JEDEC MO-178 compliant. Anode (pin 2) grounded; cathode (pin 1) carries shunt current and sets output voltage; pin 3 is NC (no connect) and must float or tie to anode per EMI mitigation guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Connects to supply rail via series resistor; voltage at this node is regulated to 3.0 V relative to anode |
| Anode (Pin 2) | Reference ground terminal | Must be connected to system ground; defines the 0 V reference point for output voltage |
| NC (Pin 3) | No-connect terminal | Left floating or tied to pin 2 (anode) to reduce EMI susceptibility in noisy environments |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with any capacitive load eliminates BOM cost and layout risk from output filtering |
| Capacitive load tolerance | Immune to instability from >1 nF load capacitance-simplifies interface with ADC sample-and-hold inputs |
| Micropower operation | 62 μA minimum operating current enables battery-powered field transmitter designs with multi-year runtime |
| Low thermal hysteresis | 0.08% hysteresis ensures repeatable voltage after thermal cycling-critical for recalibration-free instrumentation |
| Zener-zap trimming | Fuse-based wafer-level calibration guarantees ±0.5% initial accuracy without post-package adjustment |
Applications
| Field Transmitters | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered sensor transmitting temperature/pressure data over long cables in oil & gas plants. IC Role / Device Role / Timing Role: Shunt reference providing stable 3.0 V excitation for bridge sensors and ADC reference for digitizing analog signals. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <0.1% total error across −40°C to +85°C ambient-meeting SIL-2 functional safety margin requirements. | Use Scenario: Smart metering units monitoring grid voltage, current, and power quality in utility substations. IC Role / Device Role / Timing Role: Precision reference for 24-bit delta-sigma ADCs measuring RMS voltage and harmonic distortion. Use Value: 35 μVrms noise and ≤0.9 Ω dynamic impedance prevent quantization noise floor degradation-enabling Class 0.2 meter accuracy. |
| Analog Input Module | Automotive ECUs |
Use Scenario: Industrial PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple signals with cold-junction compensation. IC Role / Device Role / Timing Role: Primary reference for programmable gain instrumentation amplifiers and SAR ADC front-ends. Use Value: Micropower operation (62 μA min) allows shared reference across multiple channels without thermal derating-reducing board-level power dissipation by >30% vs. bandgap alternatives. | Use Scenario: Engine control unit sensing throttle position, manifold pressure, and coolant temperature under hood temperatures up to 125°C. IC Role / Device Role / Timing Role: Stable 3.0 V reference for sensor signal conditioning and microcontroller ADC subsystems. Use Value: Extended-grade thermal performance (−40°C to +125°C) and AEC-Q100 qualification ensure compliance with automotive Grade 1 requirements-no derating needed at peak under-hood temps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | Same 3.0 V output, ±0.5% tolerance, but higher 100 μA min operating current and 120 ppm/°C TC | Less suitable for ultra-low-power field transmitters; better for higher-current buffered reference designs | Select TL4050C30IDBZR when higher drive capability (>15 mA) or tighter long-term drift (<50 ppm/1000h) is required |
| REF3030AIDBZR | 3.0 V series reference with 50 ppm/°C TC and 50 μVrms noise; requires output capacitor and consumes 45 μA quiescent current | Not pin-compatible; needs external capacitor and different biasing-unsuitable for direct replacement in shunt topologies | Choose REF3030AIDBZR only when series architecture is acceptable and lower noise floor is prioritized over layout simplicity |
Compared with TL4050C30IDBZR and REF3030AIDBZR, the LM4040CIM3-3.0/NOPB offers the lowest minimum operating current (62 μA), smallest footprint (SOT-23), and true shunt topology-making it optimal for space- and power-constrained analog signal chains where capacitor-free stability is mandatory.
Availability
LM4040CIM3-3.0/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 availability and traceable lot history.
Supply support for LM4040CIM3-3.0/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 digital signal technologies with over 90 years of innovation in precision analog ICs.
The LM4040-N series was designed specifically for high-accuracy, low-power shunt reference applications in industrial, automotive, and energy infrastructure systems-emphasizing stability, small size, and ease of use without external components.
FAQ
What is the maximum operating temperature for LM4040CIM3-3.0/NOPB?
The LM4040CIM3-3.0/NOPB is rated for industrial temperature range: −40°C to +85°C. Its internal junction can withstand up to 125°C, but sustained operation above +85°C ambient requires thermal derating per the SOT-23 package's RθJA = 291.9°C/W and proper PCB copper area. The LM4040CIM3-3.0/NOPB datasheet specifies electrical characteristics only within the industrial grade limits.
Does LM4040CIM3-3.0/NOPB require an external capacitor for stability?
No, the LM4040CIM3-3.0/NOPB does not require an external output capacitor. Its advanced design maintains stability with any capacitive load-including >1 nF-eliminating the need for external compensation. This feature is confirmed in the official TI datasheet Section 3 and simplifies layout for the LM4040CIM3-3.0/NOPB in noise-sensitive applications like precision ADC front-ends.
What is the minimum cathode current needed for LM4040CIM3-3.0/NOPB to regulate at 3.0 V?
The LM4040CIM3-3.0/NOPB requires a minimum cathode current of 62 μA at 25°C to maintain regulation at 3.0 V. This value increases slightly across temperature-up to 65 μA over the full −40°C to +85°C range. Below this threshold, the LM4040CIM3-3.0/NOPB exits regulation and output voltage drops nonlinearly.
How does the LM4040CIM3-3.0/NOPB compare to bandgap-based shunt references in noise performance?
The LM4040CIM3-3.0/NOPB delivers 35 μVrms wideband noise (10 Hz–10 kHz), significantly lower than typical bandgap shunt references (≥60 μVrms). This advantage stems from its buried Zener structure and curvature-corrected design. For high-resolution data acquisition, the LM4040CIM3-3.0/NOPB's noise floor directly supports 16+ ENOB in SAR and delta-sigma ADC systems without additional filtering.
Is LM4040CIM3-3.0/NOPB AEC-Q100 qualified?
No, the LM4040CIM3-3.0/NOPB is not AEC-Q100 qualified. It belongs to the standard LM4040-N family (industrial grade). For automotive applications, TI offers the LM4040CQ30IDBZR (Q1 variant), which is AEC-Q100 Grade 3 qualified (−40°C to +85°C) and shares identical electrical specs-but LM4040CIM3-3.0/NOPB itself is not certified.
LM4040CIM3-3.0/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):
- 3V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040CIM3-3.0/NOPB FAQ
1.How can I place an order for LM4040CIM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-3.0/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 LM4040CIM3-3.0/NOPB reliable?
The price and inventory of LM4040CIM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-3.0/NOPB?
LM4040CIM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-3.0/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 LM4040CIM3-3.0/NOPB?
For technical support, including LM4040CIM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040CIM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-3.0/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 LM4040CIM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-3.0/NOPB?
All LM4040CIM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-3.0/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 LM4040CIM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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