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Texas Instruments LM4040CIM3X-2.0/NOPB
- Part No.:
- LM4040CIM3X-2.0/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3X-2.0/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,650
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Product details
Overview
LM4040CIM3X-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 ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and 35 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 15 mA over −40°C to +85°C and requires no output capacitor.
For engineers reviewing the LM4040CIM3X-2.0/NOPB datasheet, LM4040CIM3X-2.0/NOPB pinout, LM4040CIM3X-2.0/NOPB application, or LM4040CIM3X-2.0/NOPB equivalent, this device serves as a stable, low-noise, space-efficient reference for analog signal conditioning, data acquisition front-ends, and automotive sensor interfaces where tight voltage accuracy and thermal stability are critical.
Technical Context
The LM4040CIM3X-2.0/NOPB uses Zener-zap trimming during wafer sort to achieve ±0.5% initial accuracy at 25°C and incorporates bandgap-derived temperature drift curvature correction. Its shunt topology regulates by sinking current through the cathode to maintain a precise 2.048 V across the anode–cathode terminals.
It exhibits low dynamic impedance (0.9 Ω typical at 1 mA), tolerates capacitive loads without oscillation, and maintains stability across its full 60 μA–15 mA operating current range - enabling use in high-impedance bias networks and low-power sensor excitation circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - sets precise bias point for ADC references, DAC feedback, and analog comparators. |
| Initial Tolerance | ±0.5% at 25°C (C grade) - enables single-supply 12-bit system accuracy without calibration. |
| Temp Coefficient | ≤100 ppm/°C - ensures ≤±0.52 mV drift over −40°C to +85°C ambient, critical for field transmitter long-term stability. |
| Noise (10 Hz–10 kHz) | 35 μVrms - minimizes added uncertainty in high-resolution data acquisition systems (e.g., 16-bit+ SAR ADCs). |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power IoT sensors and robust industrial modules with variable load conditions. |
| Dynamic Impedance | 0.9 Ω typical at 1 mA - provides fast transient response and low load regulation error (<1 mV change per 1 mA load shift). |
Pinout & Package
SOT-23 (DBZ) package: 3-pin surface-mount, 2.92 mm × 1.30 mm body, 1.1 mm height, JEDEC MO-178 compatible. RoHS-compliant, lead-free, and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt Current Input / Output Voltage Node | Connected to regulated voltage rail; sinks all excess current to maintain 2.048 V between cathode and anode. |
| Anode (Pin 2) | Reference Ground Reference | Typically tied to system ground or low-impedance return path; defines the 0 V reference for output voltage measurement. |
| NC (Pin 3) | No Connect | Internally unconnected; must be left floating or tied to anode per EMI mitigation guidance in noisy environments. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Eliminates BOM cost and board area for stabilization - simplifies layout in space-constrained modules like analog input PCBs. |
| Capacitive load tolerance | Stable with any value of output capacitance - enables direct connection to ADC sample capacitors or filtering networks without phase-margin risk. |
| Micropower operation | 60 μA minimum operating current - extends battery life in portable instrumentation and wireless sensor nodes. |
| Zener-zap trimmed accuracy | Guaranteed ±0.5% initial tolerance via post-fabrication laser trimming - reduces need for system-level calibration in production test. |
Applications
| Field Transmitters | Energy Infrastructure Monitoring |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitters in oil & gas refineries. IC Role / Device Role / Timing Role: Shunt reference providing excitation voltage for bridge sensors and reference for 16-bit sigma-delta ADCs. Use Value: 100 ppm/°C tempco and 35 μVrms noise ensure <0.1% total error over full industrial temperature range and lifetime. | Use Scenario: Smart meter voltage monitoring and grid-edge power quality analyzers. IC Role / Device Role / Timing Role: Precision scaling reference for isolated voltage sensing front-ends using resistive dividers and isolation amplifiers. Use Value: ±0.5% initial tolerance and low long-term drift (120 ppm @ 1000 hrs) support ANSI C12.20 Class 0.2 metering accuracy. |
| Analog Input Modules | Automotive Sensor Interfaces |
Use Scenario: Modular PLC I/O cards with multi-channel 24-bit ADCs for factory automation. IC Role / Device Role / Timing Role: Per-channel reference for multiplexed SAR ADCs, decoupled from shared supply rails. Use Value: Low dynamic impedance (0.9 Ω) and wide current range suppress crosstalk and maintain linearity across channel switching. | Use Scenario: Engine control unit (ECU) subsystems measuring throttle position, coolant temperature, and exhaust O₂. IC Role / Device Role / Timing Role: Stable bias source for ratiometric sensor signal conditioning in AEC-Q100 Grade 3 (−40°C to +85°C) environments. Use Value: Qualified per AEC-Q100 with verified ESD robustness (±2 kV HBM) and thermal hysteresis <0.08%, ensuring repeatable readings after thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL431ACDBVR | Adjustable 2.5 V reference (2.495 V typ), higher 1 mA min current, 0.22 Ω dynamic impedance, SO-8 package. | Requires two external resistors for 2.048 V setting; unsuitable for ultra-low-power designs due to higher quiescent current. | Select when adjustable output or higher sink current (>100 mA) is needed; avoid for battery-powered 2.048 V fixed-reference use. |
| MAX6002EUR+T | Fixed 2.048 V shunt reference, ±0.2% initial tolerance (A grade), 75 ppm/°C max tempco, SC70-3 package. | Tighter initial accuracy and lower tempco, but rated only for −40°C to +85°C industrial grade - no extended temp or AEC-Q100 qualification. | Select when highest initial accuracy is prioritized over automotive qualification or extended temperature operation. |
Compared with TL431ACDBVR and MAX6002EUR+T, LM4040CIM3X-2.0/NOPB uniquely combines fixed 2.048 V output, SOT-23 footprint, AEC-Q100 Grade 3 qualification, and micropower 60 μA operation - making it optimal for space- and power-constrained automotive and industrial analog signal chains requiring guaranteed 2.048 V precision.
Availability
LM4040CIM3X-2.0/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and analog input modules requiring stable component supply, long-lifecycle availability, and automotive-grade reliability.
Supply support for LM4040CIM3X-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, embedded processing, and digital signal technologies, with decades of expertise in precision analog ICs and automotive-qualified components.
The LM4040-N series is designed for space-critical, low-power applications demanding high initial accuracy, low noise, and thermal stability - targeting industrial process control, automotive sensor systems, and portable instrumentation.
FAQ
What is the exact output voltage of LM4040CIM3X-2.0/NOPB and how is it specified?
The LM4040CIM3X-2.0/NOPB delivers a nominal reverse breakdown voltage of 2.048 V, specified at 100 μA test current and 25°C. Its initial tolerance is ±0.5% (C grade), meaning the actual voltage falls between 2.0378 V and 2.0582 V at room temperature. This precise value aligns with binary-scaled 12-bit full-scale references (211 × 1 mV), making LM4040CIM3X-2.0/NOPB ideal for high-resolution data converters.
Does LM4040CIM3X-2.0/NOPB require an external capacitor for stability?
No, LM4040CIM3X-2.0/NOPB does not require an external output capacitor. Its internal design ensures stability across its entire operating current range (60 μA to 15 mA) and with any capacitive load - including ADC sampling capacitors and EMI filter networks. This eliminates layout constraints and BOM cost, distinguishing LM4040CIM3X-2.0/NOPB from many legacy shunt references that mandate minimum capacitance.
What is the minimum operating current for LM4040CIM3X-2.0/NOPB and why does it matter?
The LM4040CIM3X-2.0/NOPB has a minimum operating current of 60 μA at 25°C, increasing slightly to 65 μA over −40°C to +85°C. This micropower threshold enables use in battery-operated devices such as wireless sensors and portable meters. Operating below this current risks loss of regulation and increased output voltage error, so LM4040CIM3X-2.0/NOPB must be biased with sufficient series resistance to guarantee ≥60 μA under worst-case load and temperature conditions.
Is LM4040CIM3X-2.0/NOPB qualified for automotive applications?
Yes, LM4040CIM3X-2.0/NOPB is part of the LM4040-N-Q1 family and is AEC-Q100 qualified for automotive applications. It meets Grade 3 requirements (−40°C to +85°C ambient), includes ±2000 V HBM ESD protection, and undergoes stress testing for reliability in engine control, body electronics, and ADAS subsystems. The "NOPB" suffix confirms lead-free, RoHS-compliant packaging suitable for automotive manufacturing.
How does the temperature coefficient of LM4040CIM3X-2.0/NOPB affect system accuracy?
The LM4040CIM3X-2.0/NOPB has a maximum average temperature coefficient of 100 ppm/°C over −40°C to +85°C. For a 2.048 V output, this translates to ±0.52 mV drift across the full range - contributing less than 0.025% of full-scale error in a 12-bit system. Combined with low thermal hysteresis (0.08%) and curvature-compensated bandgap-Zener architecture, LM4040CIM3X-2.0/NOPB maintains predictable, repeatable performance in thermally dynamic environments.
LM4040CIM3X-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
LM4040CIM3X-2.0/NOPB FAQ
1.How can I place an order for LM4040CIM3X-2.0/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3X-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 LM4040CIM3X-2.0/NOPB reliable?
The price and inventory of LM4040CIM3X-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 LM4040CIM3X-2.0/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIM3X-2.0/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3X-2.0/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3X-2.0/NOPB?
LM4040CIM3X-2.0/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3X-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 LM4040CIM3X-2.0/NOPB?
For technical support, including LM4040CIM3X-2.0/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3X-2.0/NOPB requirements.
6.How does Aetrix verify that LM4040CIM3X-2.0/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3X-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 LM4040CIM3X-2.0/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIM3X-2.0/NOPB?
All LM4040CIM3X-2.0/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3X-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 LM4040CIM3X-2.0/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIM3X-2.0/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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