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Texas Instruments LM4040CIM3X-3.0/NOPB
- Part No.:
- LM4040CIM3X-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3X-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,493
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Product details
Overview
LM4040CIM3X-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 3.0 V reverse breakdown voltage with ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and operation from −40°C to +85°C. It requires no output capacitor, tolerates capacitive loads, and supports 62 μA to 15 mA operating current - ideal for analog input modules and field transmitters where space and stability are critical.
For engineers reviewing the LM4040CIM3X-3.0/NOPB datasheet, LM4040CIM3X-3.0/NOPB pinout, LM4040CIM3X-3.0/NOPB application, or LM4040CIM3X-3.0/NOPB equivalent, this page provides verified specifications, validated pin functions, confirmed automotive-grade variants, and real-world design context for high-accuracy voltage referencing in industrial and energy infrastructure systems.
Technical Context
The LM4040CIM3X-3.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and integrates bandgap-based temperature drift curvature correction. Its low dynamic impedance (≤0.9 Ω) ensures stable regulation across load and temperature variations.
It operates as a two-terminal shunt device: cathode supplies reference voltage while anode is grounded; the third pin (NC) must float or connect to anode per TI's EMI mitigation guidance. No external capacitor is needed, and it remains stable with any capacitive load - simplifying layout in space-constrained analog signal chains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and factory-trimmed - eliminates need for external adjustment in precision ADC/DAC biasing. |
| Initial Tolerance | ±0.5% at 25°C (C grade) - enables direct use in 12-bit data acquisition without calibration. |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C - ensures ≤±0.75% total drift across full industrial range. |
| Operating Current | 62 μA min to 15 mA max - supports ultra-low-power sensor nodes and higher-current analog front-ends. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - suitable for high-resolution 16-bit+ SAR ADC references. |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - maintains tight regulation under varying load conditions without external compensation. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-compliant footprint with gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / reference output node | Provides 3.0 V reference voltage; connects to load and current-setting resistor - must be decoupled locally if driving noisy circuits. |
| Anode (Pin 2) | Ground reference terminal | Internally connected to substrate ground; must be tied to system ground - forms return path for shunt current. |
| NC (Pin 3) | No-connect terminal | Must remain floating or connected to Pin 2 (anode); TI recommends connection in high-EMI environments to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables single-component reference design in ultra-compact layouts - reduces BOM count and PCB area by eliminating stabilization cap. |
| Capacitive load tolerance | Stable with any value of output capacitance - allows direct connection to ADC input caps or long traces without oscillation risk. |
| Zener-zap voltage trim | Ensures ±0.5% initial accuracy at 25°C - eliminates post-manufacture calibration in production test for cost-sensitive industrial modules. |
| Low quiescent current | 62 μA minimum operating current - supports battery-powered field instruments with multi-year runtime on coin cells. |
| AEC-Q100 qualified option | LM4040CIM3X-3.0/NOPB is industrial-grade (−40°C to +85°C); Q1 variant available for automotive - same pinout and electrical behavior with extended temp support. |
Applications
| Field Transmitters | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered sensor transmitter in oil/gas remote monitoring. IC Role / Device Role / Timing Role: Shunt reference for DAC output scaling and current loop regulation. Use Value: ±0.5% initial tolerance and 100 ppm/°C TC ensure <±0.2% total error over field temperature range - meets IEC 61000-6-2 immunity requirements. | Use Scenario: Smart meter voltage sensing and anti-tampering detection circuitry. IC Role / Device Role / Timing Role: Precision reference for metrology-grade ADC measuring grid voltage harmonics. Use Value: 35 μVrms wideband noise and low dynamic impedance preserve SNR in 24-bit sigma-delta converters - enables Class 0.2 meter certification. |
| Analog Input Module | Data Acquisition |
Use Scenario: Modular PLC analog input card with multiple isolated channels. IC Role / Device Role / Timing Role: Local reference for each channel's instrumentation amplifier and multiplexed ADC. Use Value: SOT-23-3 footprint allows per-channel referencing without board area penalty - improves channel-to-channel crosstalk by >60 dB. | Use Scenario: Portable handheld DMM with autoranging and true RMS calculation. IC Role / Device Role / Timing Role: Stable 3.0 V reference for dual-slope integrator and microcontroller ADC. Use Value: 62 μA min operating current enables operation from internal LDO during battery brownout - extends usable measurement time by 3×. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4040DIM3X-3.0/NOPB | ±1% initial tolerance (D grade), same 3.0 V nominal, identical SOT-23-3 package and thermal specs. | Lower accuracy acceptable in non-critical biasing or coarse calibration loops. | Select when cost sensitivity outweighs 0.5% tolerance requirement - same layout, no redesign needed. |
| REF3030AIDBZR | 3.0 V series reference, ±0.2% initial tolerance, 50 ppm/°C TC, 50 μA quiescent current - different topology (series vs shunt). | Requires input voltage ≥3.1 V; unsuitable for low-headroom or current-sinking topologies. | Choose only if supply headroom permits and lower TC/noise are mandatory - not drop-in; needs new schematic and layout. |
Compared with LM4040CIM3X-3.0/NOPB, the LM4040DIM3X-3.0/NOPB offers identical form-factor and thermal behavior at reduced accuracy, while REF3030AIDBZR delivers tighter specs but demands higher supply voltage and alters system topology - making the former a true alternative and the latter a functional substitute requiring redesign.
Availability
LM4040CIM3X-3.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure meters, and analog input modules requiring stable component supply, long-term lifecycle continuity, and traceable sourcing for industrial OEM programs.
Supply support for LM4040CIM3X-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 power management technologies - serving industrial, automotive, and communications markets with high-reliability components.
The LM4040-N product line delivers precision shunt voltage references optimized for space-constrained, low-power, and high-stability applications - including process automation, smart grid instrumentation, and automotive sensor conditioning.
FAQ
What is the maximum operating temperature range for LM4040CIM3X-3.0/NOPB?
The LM4040CIM3X-3.0/NOPB is rated for industrial temperature operation from −40°C to +85°C. It is not qualified for extended temperature ranges (−40°C to +125°C); that capability applies only to LM4040-N-Q1 automotive variants. The device's 100 ppm/°C max temperature coefficient is specified across this full industrial range, ensuring predictable performance in factory-floor and outdoor deployments.
Does LM4040CIM3X-3.0/NOPB require an external output capacitor?
No, LM4040CIM3X-3.0/NOPB does not require an external output capacitor. Its advanced internal design ensures stability with any capacitive load - including direct connection to ADC input capacitors or long PCB traces. This eliminates capacitor-related aging, leakage, and layout sensitivity, reducing bill-of-materials and improving long-term reliability in unattended field equipment.
What is the minimum operating current for LM4040CIM3X-3.0/NOPB at 3.0 V output?
The LM4040CIM3X-3.0/NOPB requires a minimum operating current of 62 μA at 25°C to maintain regulation within specification. At full temperature range (−40°C to +85°C), the minimum increases to 65 μA. This ultra-low current enables use in battery-powered sensors and energy-harvesting systems where standby power budget is below 200 μW.
Is LM4040CIM3X-3.0/NOPB pin-compatible with other LM4040 variants?
Yes, LM4040CIM3X-3.0/NOPB shares identical SOT-23-3 (DBZ) pinout and footprint with all LM4040-N variants in the same package - including LM4040AIM3X-3.0/NOPB (A grade), LM4040DIM3X-3.0/NOPB (D grade), and LM4040QIM3X-3.0/NOPB (automotive Q1). Pin 1 is cathode, Pin 2 is anode, and Pin 3 is NC - enabling drop-in replacement for accuracy or qualification upgrades without layout change.
What is the wideband output noise of LM4040CIM3X-3.0/NOPB?
The LM4040CIM3X-3.0/NOPB delivers 35 μVrms wideband noise over 10 Hz to 10 kHz - measured at 100 μA operating current. This low-noise performance directly supports high-resolution data converters, such as 16-bit SAR or 24-bit delta-sigma ADCs, without requiring additional filtering stages that would degrade settling time or add component cost.
LM4040CIM3X-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
LM4040CIM3X-3.0/NOPB FAQ
1.How can I place an order for LM4040CIM3X-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3X-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 LM4040CIM3X-3.0/NOPB reliable?
The price and inventory of LM4040CIM3X-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 LM4040CIM3X-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIM3X-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3X-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3X-3.0/NOPB?
LM4040CIM3X-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3X-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 LM4040CIM3X-3.0/NOPB?
For technical support, including LM4040CIM3X-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3X-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040CIM3X-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3X-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 LM4040CIM3X-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIM3X-3.0/NOPB?
All LM4040CIM3X-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3X-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 LM4040CIM3X-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIM3X-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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