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Texas Instruments LM4040CIM3-3.0
- Part No.:
- LM4040CIM3-3.0
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040CIM3-3.0.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:848
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Product details
Overview
LM4040CIM3-3.0 from Texas Instruments is a precision micropower shunt voltage reference with 3.0 V nominal reverse breakdown voltage, ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, 62 μA minimum operating current, and 15 mA maximum operating current. It serves as a stable voltage reference in low-power analog signal chains for portable instrumentation and battery-powered data acquisition systems.
For engineers reviewing the LM4040CIM3-3.0 datasheet, LM4040CIM3-3.0 pinout, LM4040CIM3-3.0 application, or LM4040CIM3-3.0 equivalent, this page delivers verified electrical specifications, SOT-23-3 package terminal mapping, industrial-grade thermal performance (−40°C to +85°C), and validated alternative parts for design-in flexibility.
Technical Context
The LM4040CIM3-3.0 uses Zener-zap trimmed bandgap architecture with curvature-corrected temperature drift compensation, enabling stable 3.0 V output across −40°C to +85°C without external capacitors. Its low dynamic impedance (≤0.9 Ω at 1 mA) and wide 62 μA–15 mA operating current range support robust regulation under varying load conditions.
It operates as a two-terminal shunt device: cathode accepts input current and delivers regulated 3.0 V at its node relative to anode (ground), with no separate supply or enable pin. Thermal hysteresis is limited to 0.08% after −40°C/125°C cycling, and long-term stability is 120 ppm over 1000 hours.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.0 V nominal reverse breakdown voltage, fixed and non-adjustable |
| Initial Tolerance | ±0.5% at 25°C (C-grade), corresponding to ±15 mV absolute error |
| Temp Coefficient | Max ±100 ppm/°C over −40°C to +85°C, contributing ≤±6.5 mV drift across full range |
| Operating Current | 62 μA min to 15 mA max - supports ultra-low-power sensing and high-current DAC reference use |
| Dynamic Impedance | ≤0.9 Ω at 1 mA - ensures minimal load-induced voltage shift during transient current changes |
| Wideband Noise | 35 μVRMS (10 Hz–10 kHz) - suitable for 12-bit+ precision ADC reference applications |
| Long-Term Stability | 120 ppm over 1000 hours at 25°C - enables reliable calibration retention in field-deployed equipment |
Pinout & Package
SOT-23-3 (DBZ) package: 2.92 mm × 1.30 mm body, surface-mount, JEDEC-standard footprint. Anode (pin 2) connects to system ground; Cathode (pin 1) carries shunt current and defines regulated 3.0 V node; Pin 3 is NC and must be left floating or tied to anode per TI specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Pin 1) | Shunt current input / regulated voltage output node | Accepts external current; develops stable 3.0 V at this terminal relative to anode ground |
| Anode (Pin 2) | Reference ground terminal | Mandatory connection to system ground - all voltage regulation is referenced to this pin |
| NC (Pin 3) | No-connect terminal | Must remain unconnected or tied to pin 2 (anode); no internal function or biasing |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable operation with zero external capacitance - reduces BOM count and PCB area in space-constrained designs |
| Tolerates capacitive loads | Remains stable driving up to 10 nF directly - simplifies filtering for noise-sensitive ADC/DAC references |
| Micropower operation | 62 μA minimum current enables use in always-on battery monitoring circuits with multi-year runtime |
| Industrial temperature range | Specified performance from −40°C to +85°C - suitable for outdoor instrumentation and factory automation |
| Low thermal hysteresis | 0.08% voltage shift after thermal cycling - preserves accuracy in environments with repeated temperature excursions |
Applications
| Portable Instrumentation | Data Acquisition Systems |
|---|---|
Use Scenario: Handheld multimeter front-end analog conditioning circuitry requiring stable reference under variable battery voltage. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise 3.0 V reference for 16-bit SAR ADC and op-amp gain stages. Use Value: Enables <1 LSB error over battery discharge curve (2.7 V–4.2 V) due to low dropout and tight initial tolerance. |
Use Scenario: Modular sensor node aggregating thermocouple, RTD, and strain gauge signals in industrial IoT gateway. IC Role / Device Role / Timing Role: Primary reference for multiplexed 24-bit delta-sigma ADC, shared across multiple input channels. Use Value: Delivers 35 μVRMS noise floor and <±6.5 mV total drift, supporting 0.1°C temperature resolution. |
| Energy Management Units | Automotive Body Control Modules |
Use Scenario: Smart electricity meter measuring grid voltage/current with Class 0.5 accuracy compliance. IC Role / Device Role / Timing Role: Reference source for isolated current-sense amplifier and metrology ADC subsystem. Use Value: 120 ppm long-term stability ensures calibration validity over 10-year field life without recalibration. |
Use Scenario: Cabin ambient light and humidity sensor module in AEC-Q100-compliant vehicle platform. IC Role / Device Role / Timing Role: Precision reference for ratiometric sensor signal conditioning in 12 V automotive supply environment. Use Value: Operates reliably across −40°C to +85°C with <±0.5% total error budget, meeting ISO 16750-4 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C30IDBZR | 3.0 V, ±0.5%, SOT-23-3, 60 μA min current, 75 ppm/°C max tempco | Lower temperature coefficient but higher min current sensitivity; requires tighter current regulation | Preferred where thermal drift dominates error budget and supply current is well-regulated |
| MAX6003EUR+T | 3.0 V, ±0.5%, SOT-23-3, 60 μA min current, 75 ppm/°C max tempco, 20 μVRMS noise | Lower noise and tempco, but only qualified to −40°C to +85°C (no extended grade) | Best for ultra-low-noise portable medical sensors where 35→20 μVRMS reduction matters most |
Compared with LM4040CIM3-3.0, TL4050C30IDBZR offers tighter thermal drift but demands more stable bias current, while MAX6003EUR+T delivers lower noise and drift at the cost of no AEC-Q100 option - making LM4040CIM3-3.0 the balanced choice for industrial and automotive-adjacent designs needing proven reliability and broad operating margin.
Availability
LM4040CIM3-3.0 is available at Aetrix Electronics and suitable for portable instrumentation, data acquisition systems, and energy management units requiring stable component supply with guaranteed long-term manufacturability.
Supply support for LM4040CIM3-3.0 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 family was engineered for space-constrained, low-power applications demanding high initial accuracy and long-term stability - targeting portable test equipment, industrial sensors, and automotive body electronics.
FAQ
What is the exact output voltage tolerance of LM4040CIM3-3.0 at room temperature?
The LM4040CIM3-3.0 has a guaranteed initial reverse breakdown voltage tolerance of ±0.5% at 25°C, translating to ±15 mV around the nominal 3.0 V output. This C-grade specification is 100% production tested and documented in TI's SNOS633K datasheet Section 6.11.
Does LM4040CIM3-3.0 require an external capacitor for stability?
No - the LM4040CIM3-3.0 is internally compensated and does not require an external output capacitor. It remains stable with any capacitive load up to at least 10 nF, as confirmed in the "No Output Capacitor Required" feature and application schematic on page 2 of the official datasheet.
What is the minimum operating current for LM4040CIM3-3.0, and why does it matter?
The LM4040CIM3-3.0 requires a minimum operating current of 62 μA at 25°C to maintain regulation. Below this threshold, output voltage deviates from 3.0 V; this value is critical for ultra-low-power designs like battery-backed RTCs or wake-up comparators where current budgets are sub-100 μA.
Can LM4040CIM3-3.0 be used in automotive applications?
The LM4040CIM3-3.0 is rated for the industrial temperature range (−40°C to +85°C) and is not AEC-Q100 qualified. For automotive body electronics, TI offers the LM4040CIM3-3.0-Q1 variant - a distinct orderable part with AEC-Q100 Grade 3 qualification and identical electrical specs.
How does the LM4040CIM3-3.0 handle thermal cycling effects on output voltage?
The LM4040CIM3-3.0 exhibits 0.08% thermal hysteresis - the maximum voltage shift measured at 25°C after cycling between −40°C and +125°C. This low hysteresis ensures repeatable accuracy in applications subject to repeated environmental temperature swings, such as outdoor industrial controllers.
LM4040CIM3-3.0 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:
- Obsolete
- 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
LM4040CIM3-3.0 FAQ
1.How can I place an order for LM4040CIM3-3.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM3-3.0 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 LM4040CIM3-3.0 reliable?
The price and inventory of LM4040CIM3-3.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM3-3.0 is usually 5 days.
3.What payment methods are accepted for LM4040CIM3-3.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM3-3.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM3-3.0?
LM4040CIM3-3.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM3-3.0 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 LM4040CIM3-3.0?
For technical support, including LM4040CIM3-3.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM3-3.0 requirements.
6.How does Aetrix verify that LM4040CIM3-3.0 is sourced from the original manufacturer or authorized distributors?
All LM4040CIM3-3.0 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 LM4040CIM3-3.0 meets industry standards.
7.What is the process for return or replacement of LM4040CIM3-3.0?
All LM4040CIM3-3.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM3-3.0, 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 LM4040CIM3-3.0 part is unused and in its original packaging.
Return procedure for LM4040CIM3-3.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040CIM3-3.0 Tags
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