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Texas Instruments LM4040DIM3-3.0/NOPB
- Part No.:
- LM4040DIM3-3.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040DIM3-3.0/NOPB.pdf
- Description:
- IC VREF SHUNT 1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,729
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Product details
Overview
LM4040DIM3-3.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a fixed 3.0 V reverse breakdown voltage with ±1% initial tolerance (Grade D), 100 ppm/°C max temperature coefficient, and stable operation from 62 μA to 15 mA over −40°C to +85°C. It serves as a compact, capacitor-free reference for analog-to-digital converters and sensor signal conditioning in industrial data acquisition systems.
For engineers reviewing the LM4040DIM3-3.0/NOPB datasheet, LM4040DIM3-3.0/NOPB pinout, LM4040DIM3-3.0/NOPB application, or LM4040DIM3-3.0/NOPB equivalent, key selection criteria include its Grade D accuracy, SOT-23 thermal performance (RθJA = 291.9°C/W), low 35 μVrms noise (10 Hz–10 kHz), and compatibility with capacitive loads without external stabilization.
Technical Context
The LM4040DIM3-3.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±1% initial voltage tolerance at 25°C and integrates bandgap-derived curvature correction for stable output across temperature. Its shunt topology requires an external current-limiting resistor and sinks load current through the cathode terminal.
Designed for space-constrained PCBs, it eliminates need for output capacitance while maintaining stability with any capacitive load - a critical advantage over series references in low-power sensor front-ends and isolated power monitoring circuits where board area and BOM count are tightly constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and non-adjustable - sets precise bias point for ADC reference inputs or op-amp feedback networks. |
| Initial Tolerance | ±1% (Grade D) at 25°C - corresponds to ±30 mV absolute error, suitable for 10-bit system-level accuracy without calibration. |
| Temp Coefficient | ≤100 ppm/°C - contributes ≤±26 mV drift over −40°C to +85°C ambient, enabling stable reference in unregulated enclosures. |
| Operating Current | 62 μA to 15 mA - supports ultra-low-power wake-up circuits (e.g., 62 μA enables <200 μW dissipation at 3 V) and higher-current buffer stages. |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - low enough to avoid degrading ENOB in 14-bit SAR ADCs used in field transmitters. |
| Dynamic Impedance | ≤1.1 Ω at 1 mA - ensures minimal load-regulation error (<1.7 mV) when sourcing up to 1.5 mA into downstream circuitry. |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, 0.95 mm height, surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | I/O | Main current path: sinks all operating current and delivers regulated 3.0 V at this node relative to anode; connects to load and current-setting resistor. |
| Anode (Pin 2) | O | Reference ground node: must be connected to system ground or low-impedance return; defines voltage reference point for cathode output. |
| NC (Pin 3) | - | No-connect terminal: left floating or tied to anode per TI recommendation for EMI-sensitive layouts near switching regulators or transformers. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into space-limited modules (e.g., 4–20 mA transmitter PCBs) without stability-compensation components. |
| Tolerates capacitive loads | Supports direct connection to ADC input capacitors (e.g., 10–20 pF sampling caps) without oscillation or settling degradation. |
| Micropower operation | 62 μA minimum current allows battery-powered field instruments to maintain reference integrity for >10 years on a single CR2032 cell. |
| Zener-zap voltage trim | Ensures production-grade ±1% accuracy without post-package adjustment, reducing test time and cost in high-volume manufacturing. |
Applications
| Field Transmitters | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter with HART modulation. IC Role / Device Role / Timing Role: Shunt voltage reference for DAC output scaling and sensor excitation circuitry. Use Value: ±1% tolerance and 100 ppm/°C TC enable <0.2% full-scale error over industrial temperature range without calibration. | Use Scenario: Smart meter voltage sensing stage with isolation amplifier and sigma-delta ADC. IC Role / Device Role / Timing Role: Precision reference for isolated ADC front-end, referenced to secondary-side ground. Use Value: 35 μVrms noise and low dynamic impedance preserve >14-bit effective resolution in 100-year lifetime meters. |
| Data Acquisition | Analog Input Module |
Use Scenario: 16-channel industrial DAQ with multiplexed SAR ADC and programmable gain instrumentation amps. IC Role / Device Role / Timing Role: Per-channel or shared reference for ADC and PGA bias networks. Use Value: SOT-23 footprint allows one LM4040DIM3-3.0/NOPB per channel without increasing board area beyond 2.9 mm × 1.3 mm per reference. | Use Scenario: DIN-rail mounted analog input module converting 0–10 V / ±10 V field signals to digital bus. IC Role / Device Role / Timing Role: Stable 3.0 V reference for anti-aliasing filter op-amps and ADC reference input. Use Value: Capacitive-load tolerance eliminates need for RC snubbers on op-amp outputs driving long traces to ADCs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431CDBZR | Adjustable 2.5 V reference (2.495 V ±1%), higher 2 mA min current, 0.2 Ω typical Zdyn, SO-8 package. | Requires two resistors for 3.0 V setting; unsuitable for ultra-low-power (≥2 mA) or space-constrained designs. | Choose when adjustable output or lower dynamic impedance is prioritized over size and quiescent current. |
| MAX6012AEUR+T | Fixed 3.0 V, ±0.1% A-grade, 75 ppm/°C TC, SC70-3, 60 μA min current, but higher 50 μVrms noise. | Higher accuracy and lower TC, but increased noise limits use in high-resolution ADCs. | Choose when tighter initial tolerance and temperature stability outweigh noise sensitivity in 16-bit+ systems. |
Compared with TL431CDBZR and MAX6012AEUR+T, the LM4040DIM3-3.0/NOPB uniquely balances SOT-23 size, Grade D accuracy, micropower operation, and low noise - making it optimal for cost-sensitive, space-constrained industrial DAQ channels where ±1% system-level tolerance is acceptable.
Availability
LM4040DIM3-3.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and analog input modules requiring stable component supply with guaranteed long-term manufacturability and automotive-grade traceability (AEC-Q100 qualified variants available).
Supply support for LM4040DIM3-3.0/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 high-reliability ICs for industrial, automotive, and communications markets.
The LM4040-N product line delivers precision shunt references optimized for space-constrained, low-power applications including sensor signal chains, portable instrumentation, and automotive subsystems - with emphasis on stability, accuracy, and ease of use.
FAQ
What is the maximum operating current for LM4040DIM3-3.0/NOPB?
The LM4040DIM3-3.0/NOPB supports a maximum operating current of 15 mA across its full temperature range. This limit ensures safe power dissipation within the SOT-23 package's 306 mW rating at 25°C ambient, with appropriate derating above that temperature per its 291.9°C/W junction-to-ambient thermal resistance. Exceeding 15 mA risks thermal overstress and long-term reliability degradation in the LM4040DIM3-3.0/NOPB.
Does LM4040DIM3-3.0/NOPB require an external capacitor for stability?
No, the LM4040DIM3-3.0/NOPB does not require an external output capacitor for stability due to its internal design. Its advanced architecture maintains regulation stability even with capacitive loads up to several nanofarads - a key differentiator from many series references. This feature simplifies layout and reduces BOM count in compact designs such as handheld test equipment using the LM4040DIM3-3.0/NOPB.
What is the temperature range specification for LM4040DIM3-3.0/NOPB?
The LM4040DIM3-3.0/NOPB is specified for the industrial temperature range of −40°C to +85°C (Temperature Grade I). This range is explicitly confirmed in Section 5.3 of the datasheet under Recommended Operating Conditions and applies to all electrical characteristics for the LM4040DIM3-3.0/NOPB variant. Extended grade (−40°C to +125°C) versions exist but carry different part numbers (e.g., LM4040DIM3-3.0QML).
How does the pin 3 (NC) function in LM4040DIM3-3.0/NOPB?
Pin 3 of the LM4040DIM3-3.0/NOPB is a no-connect terminal. Per TI's datasheet, it must be left floating or connected to the anode (Pin 2) - especially in high-EMI environments like proximity to switching power supplies or transformers. This connection reduces noise coupling and improves reference stability. The LM4040DIM3-3.0/NOPB's functionality remains unchanged whether Pin 3 is floated or tied to Pin 2.
What is the typical wideband noise performance of LM4040DIM3-3.0/NOPB?
The LM4040DIM3-3.0/NOPB delivers 35 μVrms wideband noise over the 10 Hz to 10 kHz bandwidth, measured at 100 μA operating current. This value is consistent across all voltage grades and tolerance options in the LM4040-N family, including the LM4040DIM3-3.0/NOPB, and is critical for preserving signal integrity in high-resolution data acquisition systems where reference noise directly impacts effective number of bits (ENOB).
LM4040DIM3-3.0/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:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 35µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 70 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040DIM3-3.0/NOPB FAQ
1.How can I place an order for LM4040DIM3-3.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIM3-3.0/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 LM4040DIM3-3.0/NOPB reliable?
The price and inventory of LM4040DIM3-3.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIM3-3.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040DIM3-3.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIM3-3.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIM3-3.0/NOPB?
LM4040DIM3-3.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIM3-3.0/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 LM4040DIM3-3.0/NOPB?
For technical support, including LM4040DIM3-3.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIM3-3.0/NOPB requirements.
6.How does Aetrix verify that LM4040DIM3-3.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040DIM3-3.0/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 LM4040DIM3-3.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040DIM3-3.0/NOPB?
All LM4040DIM3-3.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIM3-3.0/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 LM4040DIM3-3.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040DIM3-3.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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