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Texas Instruments LM4040CIM3X-2.0
- Part No.:
- LM4040CIM3X-2.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3X-2.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:3,849
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Product details
Overview
LM4040CIM3X-2.0 from Texas Instruments is a precision micropower shunt voltage reference in SOT-23-3 package, delivering a stable 2.048 V reverse breakdown voltage with ±10 mV (±0.49%) initial tolerance at 25°C, 60 μA minimum operating current, and 100 ppm/°C max temperature coefficient - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4040CIM3X-2.0 datasheet, LM4040CIM3X-2.0 pinout, LM4040CIM3X-2.0 application, or LM4040CIM3X-2.0 equivalent, this page provides verified pin functions, industrial-grade thermal performance (−40°C to +85°C), noise (35 μVrms, 10 Hz–10 kHz), dynamic impedance (0.9 Ω), and real-world alternative part guidance.
Technical Context
The LM4040CIM3X-2.0 operates as a two-terminal shunt reference: cathode sinks current while anode connects to ground, enabling simple voltage regulation without series pass elements. Its bandgap-derived Zener-zap trimmed structure ensures curvature-corrected temperature stability and low dynamic impedance across 60 μA–15 mA operating current.
It tolerates capacitive loads without external compensation and requires no output capacitor - unlike series references - making it ideal for space-constrained, low-quiescent-current designs where load regulation (<8 mV over 1–15 mA) and thermal hysteresis (0.08%) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.048 V nominal reverse breakdown voltage - precise enough for 12-bit ADC reference scaling (±0.49% initial error) |
| Initial Tolerance | ±10 mV at 25°C (Grade C) - enables calibration-free operation in mid-accuracy measurement systems |
| Temp Coefficient | Max ±100 ppm/°C over −40°C to +85°C - contributes ≤±6.5 mV drift across full industrial range |
| Operating Current | 60 μA to 15 mA - supports ultra-low-power sensor nodes and high-current reference buffering |
| Dynamic Impedance | 0.9 Ω typical at 1 mA - maintains voltage stability under fast load transients |
| Wideband Noise | 35 μVrms (10 Hz–10 kHz) - suitable for 16-bit data acquisition without added filtering |
| Thermal Hysteresis | 0.08% - ensures repeatable voltage after thermal cycling, critical for field-deployed test equipment |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, gull-wing leads, JEDEC MO-178 compatible. RoHS-compliant, Pb-free, rated for reflow up to 260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / output node | Connects to regulated voltage rail; sinks all reference current plus load current - must be decoupled locally if driving noisy loads |
| Anode (Pin 2) | Ground reference terminal | Low-impedance return path; must connect directly to system ground plane to minimize IR drop and noise coupling |
| NC (Pin 3) | No-connect terminal | Internally unconnected; must float or tie to Pin 2 (anode) per TI specification - not usable as feedback or trim |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Enables direct integration into compact PCB layouts without stability-compromising bypass components |
| Tolerates capacitive loads | Stable with >1 μF ceramic output capacitance - simplifies EMI filtering and power-rail decoupling |
| Low 60 μA start-up current | Supports battery-powered devices with multi-year shelf life and wake-on-event architectures |
| 100 ppm/°C max tempco | Guarantees <±13 mV total drift over −40°C to +85°C - eliminates need for software temperature compensation |
| 35 μVrms wideband noise | Meets SNR requirements for 16-bit SAR ADCs without external low-noise op-amp buffering |
Applications
| Portable Instrumentation | Data Acquisition Front-End |
|---|---|
|
Use Scenario: Handheld multimeter with 12-bit sigma-delta ADC and lithium coin-cell supply. IC Role / Device Role / Timing Role: Shunt reference providing stable 2.048 V reference for ADC conversion and sensor excitation. Use Value: Enables single-supply operation down to 2.2 V while maintaining ±0.5% full-scale accuracy across temperature. |
Use Scenario: Industrial PLC analog input module measuring 4–20 mA loop sensors. IC Role / Device Role / Timing Role: Precision voltage reference for 16-bit ADC reference rail and RTD bridge excitation. Use Value: Delivers 35 μVrms noise floor and <±13 mV thermal drift - meets IEC 61000-6-2 immunity requirements. |
| Energy Metering Subsystem | Automotive Cabin Sensor Hub |
|
Use Scenario: DIN-rail energy meter with metrology SoC and isolated current sensing. IC Role / Device Role / Timing Role: Reference source for anti-aliasing filter biasing and ADC reference voltage. Use Value: 0.08% thermal hysteresis ensures repeatability after daily ambient cycling; 15 mA drive supports multiple parallel channels. |
Use Scenario: Automotive interior air quality sensor cluster (CO₂, VOC, humidity) with CAN FD interface. IC Role / Device Role / Timing Role: Stable 2.048 V reference for analog front-end signal conditioning and ADC reference. Use Value: Qualified per AEC-Q100 Grade 3 (−40°C to +85°C); SOT-23 package fits tight spacing near MEMS sensors. |
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 | Same 2.048 V output, ±0.5% initial tolerance (Grade C), 75 ppm/°C max tempco, SOT-23-3 package | Higher min operating current (75 μA vs. 60 μA); slightly better tempco but higher cost | Prefer when tighter long-term stability (50 ppm/1000 hrs) is required over ultra-low IQ |
| MAX6002EUR+T | 2.048 V output, ±0.2% initial tolerance (Grade A), 50 ppm/°C max tempco, SOT-23-3 | Lower noise (20 μVrms), but requires ≥100 μA operating current and has narrower temp range (−40°C to +85°C only) | Choose for high-resolution data loggers where noise dominates error budget, not battery life |
Compared with TL4050C20IDBZR and MAX6002EUR+T, the LM4040CIM3X-2.0 offers the lowest minimum operating current (60 μA) and best balance of cost, industrial temp range, and proven field reliability - making it optimal for cost-sensitive, battery-constrained instrumentation.
Availability
LM4040CIM3X-2.0 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and automotive cabin sensor hubs requiring stable component supply with guaranteed long-term continuity.
Supply support for LM4040CIM3X-2.0 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 high-volume manufacturing.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, battery-operated, and industrial measurement applications - emphasizing low IQ, thermal stability, and robustness across extended temperature ranges.
FAQ
What is the exact output voltage and tolerance of the LM4040CIM3X-2.0?
The LM4040CIM3X-2.0 has a nominal reverse breakdown voltage of 2.048 V with an initial tolerance of ±10 mV (±0.49%) at 25°C, specified for Grade C devices in the industrial temperature range (−40°C to +85°C). This tolerance is confirmed in Section 6.6 of the TI datasheet SNOS633K.
Does the LM4040CIM3X-2.0 require an external capacitor for stability?
No - the LM4040CIM3X-2.0 does not require an external output capacitor and remains stable with any capacitive load, including >1 μF ceramic types. This is enabled by its internal bandgap-Zener architecture and is explicitly stated in the Features and Description sections of the TI datasheet.
What is the minimum operating current for the LM4040CIM3X-2.0?
The LM4040CIM3X-2.0 requires a minimum operating current of 60 μA at 25°C, rising to 65 μA across the full industrial temperature range (−40°C to +85°C). This value is specified in Table 6.6 of the official TI datasheet SNOS633K for Grade C devices in SOT-23 packaging.
Can the LM4040CIM3X-2.0 be used in automotive applications?
The LM4040CIM3X-2.0 is rated for industrial temperature (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive use, TI offers the LM4040-N-Q1 variant (e.g., LM4040CIM3X-2.0Q1), which carries AEC-Q100 Grade 3 certification - the standard LM4040CIM3X-2.0 is intended for industrial and portable equipment only.
What is the thermal hysteresis performance of the LM4040CIM3X-2.0?
The LM4040CIM3X-2.0 exhibits 0.08% thermal hysteresis - defined as the voltage difference measured at 25°C after cycling between −40°C and +125°C. This value is consistent across all grades and packages and is documented in Tables 6.5–6.7 of the TI datasheet SNOS633K.
LM4040CIM3X-2.0 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:
- Discontinued at Digi-Key
- 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 FAQ
1.How can I place an order for LM4040CIM3X-2.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3X-2.0 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 reliable?
The price and inventory of LM4040CIM3X-2.0 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 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3X-2.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3X-2.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3X-2.0?
LM4040CIM3X-2.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3X-2.0 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?
For technical support, including LM4040CIM3X-2.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3X-2.0 requirements.
6.How does Aetrix verify that LM4040CIM3X-2.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3X-2.0 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 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3X-2.0?
All LM4040CIM3X-2.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3X-2.0, 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 part is unused and in its original packaging.
Return procedure for LM4040CIM3X-2.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM3X-2.0 Tags
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TL431AIDBZR
Texas Instruments
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TL431BQDBZR
Texas Instruments
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AN431AN-ATRG1
Diodes Incorporated
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LM4040CYM3-2.5-TR
Microchip Technology
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LM4040CYM3-4.1-TR
Microchip Technology
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LM4040EIM3-2.5/NOPB
Texas Instruments
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AZ431LBNTR-G1
Diodes Incorporated
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LM4040D20IDBZR
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LM4041DIM3-ADJ/NOPB
Texas Instruments
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LM4040DIM3X-2.5/NOPB
Texas Instruments
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LM4040DIM3-2.5/NOPB
Texas Instruments
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AZ431LANTR-G1
Diodes Incorporated
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