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Texas Instruments LM4040CIM7X-2.5/NOPB
- Part No.:
- LM4040CIM7X-2.5/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4040CIM7X-2.5/NOPB.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,350
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Product details
Overview
LM4040CIM7X-2.5/NOPB from Texas Instruments is a precision micropower shunt voltage reference in SC70-3 package, delivering a stable 2.5 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-used in analog input modules, field transmitters, and energy infrastructure sensing circuits.
For engineers reviewing the LM4040CIM7X-2.5/NOPB datasheet, LM4040CIM7X-2.5/NOPB pinout, LM4040CIM7X-2.5/NOPB application, or LM4040CIM7X-2.5/NOPB equivalent, this page provides verified specifications, SC70-3 terminal mapping, automotive-grade thermal stability data, and validated alternatives for industrial and AEC-Q100-compliant designs.
Technical Context
The LM4040CIM7X-2.5/NOPB uses Zener-zap trimming at wafer sort to achieve ±0.5% initial accuracy and integrates bandgap-derived curvature correction for low drift. Its dynamic impedance is 0.3–0.9 Ω at 1 mA, enabling stable regulation under varying load currents.
It tolerates capacitive loads without oscillation and maintains 0.08% thermal hysteresis across −40°C to +125°C cycling-critical for high-reliability measurement front-ends where long-term voltage stability impacts ADC reference accuracy and sensor signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.5 V nominal reverse breakdown voltage; fixed value eliminates external resistor networks in reference design. |
| Initial Tolerance | ±0.5% at 25°C (C grade); corresponds to ±12.5 mV absolute error for system-level calibration planning. |
| Temp Coefficient | ≤100 ppm/°C max over −40°C to +85°C; contributes ≤±16.25 mV drift across full industrial range. |
| Operating Current | 60 μA to 15 mA; ultra-low minimum enables battery-powered sensor nodes; high max supports active load driving. |
| Output Noise | 35 μVrms (10 Hz–10 kHz); low enough for 16-bit ADC reference without additional filtering. |
| Dynamic Impedance | 0.3–0.9 Ω at 1 mA; ensures <1 mV output shift per 1 mA load change-critical for precision current-sense references. |
| Thermal Hysteresis | 0.08% after −40°C/+125°C cycling; guarantees repeatability in field-deployed instrumentation. |
Pinout & Package
LM4040CIM7X-2.5/NOPB is packaged in SC70-3 (DCK), with 2.00 mm × 1.25 mm body size and 0.65 mm pitch. Pin 1 = Anode (ground reference), Pin 2 = Cathode (shunt current/output node), Pin 3 = NC (no connect, must float or tie to anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Anode) | Reference ground node | Internally connected to substrate; must be tied to system ground for stable biasing and noise rejection. |
| Pin 2 (Cathode) | Shunt current sink / output voltage node | Delivers regulated 2.5 V when reverse-biased; connects to feedback node of op-amp or ADC reference input. |
| Pin 3 (NC) | No-connect terminal | Not internally bonded; floating by default; TI recommends tying to anode in EMI-prone layouts to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Enables single-component reference design in space-constrained PCBs-eliminates footprint, BOM count, and capacitor aging risk. |
| Capacitive load tolerance | Stable with any output capacitance (including 10 nF–10 μF decoupling caps), simplifying layout for mixed-signal SoCs and isolated power rails. |
| Zener-zap voltage trim | Ensures ±0.5% initial accuracy at wafer level-reduces need for post-assembly calibration in production test. |
| Low 35 μVrms noise | Supports high-resolution data acquisition without added low-noise LDO or RC filtering-directly interfaces 16-bit+ SAR ADCs. |
| AEC-Q100 Grade 3 qualified | Validated for −40°C to +85°C operation in automotive subsystems (e.g., battery monitoring, ADAS sensors) with full reliability testing. |
Applications
| Field Transmitter | Energy Infrastructure |
|---|---|
Use Scenario: 4–20 mA loop-powered pressure/temperature transmitter in oil & gas wellheads. IC Role / Device Role / Timing Role: Shunt reference for DAC output scaling and current-loop compliance voltage generation. Use Value: 60 μA min operating current enables operation during low-loop-current fault conditions; 100 ppm/°C TC ensures <±0.1% span error over ambient extremes. | Use Scenario: Grid-tie inverter DC-link voltage sensing and protection circuitry. IC Role / Device Role / Timing Role: Precision reference for isolated sigma-delta ADC measuring 1000 V DC bus. Use Value: 35 μVrms noise prevents quantization uncertainty in 24-bit measurements; SC70 package fits tight isolation barrier spacing. |
| Analog Input Module | Automotive Battery Monitoring |
Use Scenario: Industrial PLC analog input card accepting ±10 V, 0–20 mA, and thermocouple signals. IC Role / Device Role / Timing Role: Common-mode reference for programmable gain instrumentation amplifier front-end. Use Value: 0.08% thermal hysteresis ensures repeatable calibration after field temperature cycling; ±0.5% tolerance reduces factory trim steps. | Use Scenario: 12 V lead-acid battery state-of-charge monitoring in automotive body control modules. IC Role / Device Role / Timing Role: Stable reference for microcontroller ADC measuring battery voltage across cold-crank (−40°C) to hot-idle (+85°C) conditions. Use Value: AEC-Q100 qualification confirms reliability in automotive environments; SC70 footprint saves space on compact BCM PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TL4050C25IDBZR | Same 2.5 V output, ±0.5% tolerance, but SOT-23-3 package; higher 50 μVrms noise; 120 ppm/°C max TC. | Less suitable for ultra-low-noise 16-bit DAQ; acceptable for cost-sensitive industrial controls with relaxed drift specs. | Select TL4050C25IDBZR only if SC70 footprint is not required and 120 ppm/°C TC meets system budget. |
| MAX6008AEUR+T | 2.5 V, ±0.2% initial tolerance (A grade), 75 ppm/°C TC, but 50 μA min current; SC70-3 package identical to LM4040CIM7X-2.5/NOPB. | Better accuracy and lower drift, but higher minimum current limits use in ultra-low-power wake-up circuits. | Choose MAX6008AEUR+T when ±0.2% tolerance and 75 ppm/°C TC are mandatory, and 50 μA min current is acceptable. |
Compared with TL4050C25IDBZR and MAX6008AEUR+T, LM4040CIM7X-2.5/NOPB offers the optimal balance of SC70-3 footprint, 35 μVrms noise, and AEC-Q100 qualification-making it preferred for space-constrained, noise-sensitive automotive and industrial measurement systems where ±0.5% tolerance is sufficient.
Availability
LM4040CIM7X-2.5/NOPB is available at Aetrix Electronics and suitable for field transmitters, energy infrastructure monitoring, and analog input modules requiring stable component supply, automotive-grade reliability, and SC70 packaging.
Supply support for LM4040CIM7X-2.5/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 qualification.
The LM4040-N product line delivers micropower shunt references optimized for space-constrained, high-stability applications including industrial sensing, automotive ECUs, and portable instrumentation-prioritizing low drift, low noise, and robust thermal performance.
FAQ
What is the maximum operating temperature range for LM4040CIM7X-2.5/NOPB?
The LM4040CIM7X-2.5/NOPB is rated for industrial temperature operation from −40°C to +85°C. It is also AEC-Q100 Grade 3 qualified, meaning it meets automotive reliability requirements within that same range. Extended temperature versions (Grade 1) exist for −40°C to +125°C, but LM4040CIM7X-2.5/NOPB specifically is specified for the industrial range.
Does LM4040CIM7X-2.5/NOPB require an external capacitor for stability?
No, LM4040CIM7X-2.5/NOPB does not require an external output capacitor. Its internal design ensures stability with any capacitive load-including bypass caps up to 10 μF-making it ideal for compact, low-component-count reference circuits where board space is constrained.
What is the minimum cathode current needed for LM4040CIM7X-2.5/NOPB to regulate at 2.5 V?
The LM4040CIM7X-2.5/NOPB requires a minimum cathode current of 60 μA at 25°C to maintain regulation at its nominal 2.5 V output. This value increases slightly over temperature, reaching 65 μA across the full −40°C to +85°C range-critical for ultra-low-power sensor node designs.
How does the noise performance of LM4040CIM7X-2.5/NOPB compare to other shunt references?
LM4040CIM7X-2.5/NOPB delivers 35 μVrms wideband noise (10 Hz–10 kHz), among the lowest in its class. This is significantly better than TL4050C25IDBZR (50 μVrms) and comparable to higher-cost bandgap-based references-enabling direct interface with 16-bit ADCs without additional filtering.
Is LM4040CIM7X-2.5/NOPB pin-compatible with other LM4040 variants in SC70-3?
Yes, all LM4040 variants in SC70-3 (e.g., LM4040AIM7X-2.5/NOPB, LM4040DIM7X-2.5/NOPB) share identical pinout: Pin 1 = Anode, Pin 2 = Cathode, Pin 3 = NC. This allows drop-in replacement across tolerance grades without PCB changes-simplifying design reuse and test validation.
LM4040CIM7X-2.5/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- 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:
- SC-70-5
LM4040CIM7X-2.5/NOPB FAQ
1.How can I place an order for LM4040CIM7X-2.5/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040CIM7X-2.5/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 LM4040CIM7X-2.5/NOPB reliable?
The price and inventory of LM4040CIM7X-2.5/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040CIM7X-2.5/NOPB is usually 5 days.
3.What payment methods are accepted for LM4040CIM7X-2.5/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040CIM7X-2.5/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040CIM7X-2.5/NOPB?
LM4040CIM7X-2.5/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040CIM7X-2.5/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 LM4040CIM7X-2.5/NOPB?
For technical support, including LM4040CIM7X-2.5/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040CIM7X-2.5/NOPB requirements.
6.How does Aetrix verify that LM4040CIM7X-2.5/NOPB is sourced from the original manufacturer or authorized distributors?
All LM4040CIM7X-2.5/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 LM4040CIM7X-2.5/NOPB meets industry standards.
7.What is the process for return or replacement of LM4040CIM7X-2.5/NOPB?
All LM4040CIM7X-2.5/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM4040CIM7X-2.5/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 LM4040CIM7X-2.5/NOPB part is unused and in its original packaging.
Return procedure for LM4040CIM7X-2.5/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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