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Texas Instruments LM4040CIM3-2.0/NOPB
- Part No.:
- LM4040CIM3-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:46,763
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Product details
Overview
LM4040CIM3-2.0/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SOT-23 package, delivering a fixed 2.048 V reverse breakdown voltage with ±10 mV (±0.49%) initial tolerance at 25°C, 60 μA to 15 mA operating current range, and 100 ppm/°C max temperature coefficient across −40°C to +85°C industrial temperature range. It serves as a stable reference for analog-to-digital converters and sensor signal conditioning in field transmitters and energy infrastructure systems.
For engineers reviewing the LM4040CIM3-2.0/NOPB datasheet, LM4040CIM3-2.0/NOPB pinout, LM4040CIM3-2.0/NOPB application, or LM4040CIM3-2.0/NOPB equivalent, key selection criteria include its 2.048 V nominal output, C-grade tolerance, SOT-23 thermal performance (291.9°C/W RθJA), no-output-capacitor operation, and compatibility with capacitive loads in space-constrained designs.
Technical Context
The LM4040CIM3-2.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±10 mV initial accuracy and incorporates bandgap-derived temperature drift curvature correction. Its low dynamic impedance (≤0.9 Ω) and wide current range ensure stable regulation under varying load conditions.
This device operates as a two-terminal shunt reference: cathode carries both input current and output voltage, while anode is grounded. It requires no external capacitor and tolerates arbitrary capacitive loading-enabling direct integration into high-precision ADC bias networks and isolated sensor front-ends without stability concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - enables precise 12-bit ADC full-scale alignment without scaling resistors |
| Initial Tolerance | ±10 mV (±0.49%) at 25°C - meets C-grade specification for cost-sensitive industrial measurement systems |
| Temp Coefficient | ≤100 ppm/°C over −40°C to +85°C - ensures ≤±1.3 mV drift across full industrial range |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current reference buffering |
| Output Noise | 35 μVrms (10 Hz–10 kHz) - minimizes quantization uncertainty in 16-bit+ data acquisition |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - maintains regulation accuracy despite rapid load current transients |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body size, 1.45 mm height, JEDEC MO-178AC compliant. Thermal resistance RθJA = 291.9°C/W (board-mounted).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Input/Output node | Carries total shunt current and provides regulated 2.048 V output; connects to supply rail via series resistor |
| Anode (Pin 2) | Reference ground | Must be connected to system ground; defines zero-reference potential for output voltage |
| NC (Pin 3) | No-connect | Internally unconnected; must remain floating or tied to anode per EMI mitigation guidance |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables immediate power-up reference stability in battery-powered devices without startup delay or BOM overhead |
| Tolerates capacitive loads | Eliminates need for isolation resistors when driving ADC sample-and-hold inputs or op-amp feedback networks |
| Micropower operation | 60 μA minimum current allows use in <100 μA sleep-mode circuits without compromising reference integrity |
| Zener-zap trimmed accuracy | Ensures production-tested ±10 mV initial tolerance without post-package calibration or sorting |
| Thermal hysteresis | 0.08% max - guarantees repeatability after thermal cycling in automotive and outdoor energy monitoring enclosures |
Applications
| Field Transmitter | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter with HART modulation. IC Role / Device Role / Timing Role: Shunt reference for DAC output scaling and sensor excitation voltage generation. Use Value: 2.048 V output directly supports 12-bit DAC resolution; ±10 mV tolerance ensures ≤0.1% full-scale error in calibrated output. |
Use Scenario: Smart meter voltage sensing stage with isolation amplifier and 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Primary voltage reference for ADC reference input and metrology IC biasing. Use Value: 35 μVrms noise and ≤0.9 Ω impedance prevent noise coupling into high-resolution measurements under variable load. |
| Analog Input Module | Automotive Sensor Interface |
Use Scenario: PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple signals. IC Role / Device Role / Timing Role: Precision reference for programmable gain instrumentation amplifier and multiplexed ADC front-end. Use Value: Wide 60 μA–15 mA current range accommodates multiple channel configurations without redesigning bias networks. |
Use Scenario: Engine control unit (ECU) oxygen sensor signal conditioner with cold-junction compensation. IC Role / Device Role / Timing Role: Stable reference for ratiometric ADC conversion of Nernst cell voltage. Use Value: 100 ppm/°C tempco and −40°C to +85°C rating maintain accuracy across engine bay thermal gradients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C20IDBZR | 2.048 V, ±0.5% (C-grade), SOT-23, 75 ppm/°C max tempco, 60 μA–15 mA | Lower tempco but higher initial tolerance; same package and pinout | Prefer TL4050C20IDBZR where tighter thermal drift dominates over initial calibration effort |
| REF3020AIDBZR | 2.048 V, ±0.2% (A-grade), SOT-23, 50 ppm/°C max tempco, 50 μA–25 mA | Higher accuracy grade and lower tempco, but requires 50 μA min current and has different quiescent behavior | Choose REF3020AIDBZR for applications demanding <±0.2% total error budget across temperature |
Compared with LM4040CIM3-2.0/NOPB, TL4050C20IDBZR trades initial tolerance for improved thermal stability, while REF3020AIDBZR delivers superior absolute accuracy at the cost of higher minimum operating current and different load regulation profile-requiring revalidation of bias resistor values.
Availability
LM4040CIM3-2.0/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 continuity and traceable sourcing.
Supply support for LM4040CIM3-2.0/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 and embedded processing technologies, with decades of expertise in precision reference design and automotive-qualified components.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, high-accuracy measurement systems in industrial, energy, and automotive applications-emphasizing low noise, wide current range, and robust thermal performance.
FAQ
What is the exact output voltage and tolerance of LM4040CIM3-2.0/NOPB?
The LM4040CIM3-2.0/NOPB has a nominal reverse breakdown voltage of 2.048 V with an initial tolerance of ±10 mV (±0.49%) at 25°C, per C-grade specification in the industrial temperature range. This value is production-tested and applies specifically to the LM4040CIM3-2.0/NOPB variant in SOT-23 packaging.
Does LM4040CIM3-2.0/NOPB require an external output capacitor?
No, the LM4040CIM3-2.0/NOPB does not require an external output capacitor for stability. Its internal design ensures unconditional stability even with arbitrary capacitive loads-a key advantage over older shunt references that mandate minimum capacitance.
What is the operating temperature range for LM4040CIM3-2.0/NOPB?
The LM4040CIM3-2.0/NOPB is rated for the industrial temperature range of −40°C to +85°C (Grade I). It is not qualified for automotive extended temperature (−40°C to +125°C); for that, the LM4040CQIM3-2.0/NOPB variant must be used.
How does LM4040CIM3-2.0/NOPB handle capacitive loads?
The LM4040CIM3-2.0/NOPB is explicitly designed to tolerate any capacitive load without oscillation or instability. This allows direct connection to ADC reference inputs, op-amp feedback nodes, or long PCB traces without added series resistance or damping components.
What is the minimum operating current for LM4040CIM3-2.0/NOPB?
The LM4040CIM3-2.0/NOPB requires a minimum operating current of 60 μA at 25°C to maintain regulation within specifications. At temperature extremes (−40°C to +85°C), the minimum increases to 65 μA to ensure stable 2.048 V output across the full industrial range.
LM4040CIM3-2.0/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):
- 2.048V
- 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
LM4040CIM3-2.0/NOPB FAQ
1.How can I place an order for LM4040CIM3-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-2.0/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 LM4040CIM3-2.0/NOPB reliable?
The price and inventory of LM4040CIM3-2.0/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-2.0/NOPB?
LM4040CIM3-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-2.0/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 LM4040CIM3-2.0/NOPB?
For technical support, including LM4040CIM3-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040CIM3-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-2.0/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 LM4040CIM3-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-2.0/NOPB?
All LM4040CIM3-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-2.0/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 LM4040CIM3-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIM3-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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