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Texas Instruments LM4041EIM7X-1.2
- Part No.:
- LM4041EIM7X-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041EIM7X-1.2.pdf
- Description:
- IC VREF SHUNT 2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,595
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Product details
Overview
LM4041EIM7X-1.2 from Texas Instruments is a precision micropower shunt voltage reference in SC70-5 package, delivering 1.225 V nominal reverse breakdown voltage with ±25 mV (±2.0%) initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and 20 μVrms wideband noise (10 Hz–10 kHz). It operates from 60 μA to 12 mA and supports stable regulation across capacitive loads without external compensation - ideal for battery-powered instrumentation and automotive sensor signal conditioning.
For engineers reviewing the LM4041EIM7X-1.2 datasheet, LM4041EIM7X-1.2 pinout, LM4041EIM7X-1.2 application, or LM4041EIM7X-1.2 equivalent, key selection criteria include its extended temperature range (−40°C to +125°C), grade-E accuracy specification, SC70-5 footprint compatibility, and absence of output capacitor requirement in low-power analog front-ends.
Technical Context
The LM4041EIM7X-1.2 implements a bandgap-based shunt reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±2.0% initial accuracy. Its design eliminates need for output capacitance by maintaining stability under any capacitive load, including >1 μF, due to low dynamic impedance (≤2 Ω) and inherent phase margin.
This variant belongs to the LM4041-N-Q1 automotive-qualified family (AEC-Q100 Grade 1), with thermal hysteresis of 0.08% and long-term stability of 120 ppm over 1000 hours. It shares functional equivalence with fixed-output versions but excludes adjustable feedback functionality - pin 5 (FB) is no-connect in the -1.2 configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225 V nominal; ±25 mV (±2.0%) tolerance at 25°C - defines absolute accuracy baseline for ADC reference or comparator threshold setting |
| Temperature Coefficient | ≤100 ppm/°C max over −40°C to +125°C - ensures <±0.125 V drift across full operating range, critical for automotive ambient sensing |
| Operating Current Range | 60 μA to 12 mA - enables ultra-low-power sleep modes (<100 μA) while supporting high-accuracy active measurement at >1 mA |
| Noise (10 Hz–10 kHz) | 20 μVrms - limits added uncertainty to <0.0017% of output, suitable for 16-bit SAR ADC references |
| Dynamic Impedance | ≤2 Ω at 1 mA - maintains voltage regulation within ±2 mV under 2 mA load transients, essential for stable biasing in op-amp circuits |
| Long-Term Stability | 120 ppm over 1000 hours - guarantees <±0.15 mV output shift during product lifetime, reducing calibration frequency in field-deployed systems |
| Thermal Hysteresis | 0.08% - corresponds to ≤1 mV hysteresis after thermal cycling between −40°C and +125°C, ensuring repeatable performance in cyclic environments |
Pinout & Package
LM4041EIM7X-1.2 is housed in a 5-pin SC70 package (1.25 mm × 2.00 mm body size), optimized for space-constrained PCB layouts. Pin 5 (FB) is internally unused and must be left floating or tied to anode (pin 2); it is not functional in the fixed 1.225 V version.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Reference ground node | Connected to system GND; establishes current return path and sets cathode voltage relative to ground |
| Cathode (Pin 3) | Shunt output terminal | Delivers regulated 1.225 V when sinking current; connects to resistor divider or load requiring precise bias |
| No-Connect (Pin 1) | Unused internal node | Must remain unconnected; no electrical function - avoids unintended parasitic coupling in high-impedance circuits |
| No-Connect (Pin 4) | Unused internal node | Must remain unconnected; electrically isolated from die - prevents contamination-induced leakage paths |
| No-Connect (Pin 5) | Feedback input (disabled) | Internally disconnected; floating or tied to anode per datasheet - ensures no interaction with fixed-voltage operation |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable under all capacitive loads (0–10 μF), eliminating BOM cost and board area for decoupling in portable medical sensors |
| AEC-Q100 Grade 1 qualified | Validated for −40°C to +125°C ambient operation with full parametric compliance - meets automotive engine control module requirements |
| Low micropower operation | 60 μA minimum operating current enables 10-year battery life in wireless IoT nodes using coin-cell power sources |
| Low noise & high PSRR | 20 μVrms noise + >60 dB PSRR up to 10 kHz - preserves SNR in precision data acquisition front-ends with noisy DC-DC supplies |
| SC70-5 footprint | 1.25 mm × 2.00 mm body enables placement in <2 mm² area - fits inside tight spaces on wearable device PCBs |
Applications
| Automotive Cabin Sensors | Portable Gas Analyzers |
|---|---|
Use Scenario: Cabin temperature and humidity sensing in HVAC control modules with CAN bus reporting. IC Role / Device Role / Timing Role: Provides stable 1.225 V reference for 12-bit ADC measuring thermistor and capacitive humidity sensor outputs. Use Value: Grade-E accuracy and 100 ppm/°C TC ensure <±0.5°C measurement error across full vehicle cabin temperature range (−40°C to +85°C). |
Use Scenario: Battery-powered handheld CO₂ detector using NDIR optical sensing with low-noise analog front-end. IC Role / Device Role / Timing Role: Supplies precision bias voltage to photodiode transimpedance amplifier and ADC reference rail. Use Value: 20 μVrms noise and 60 μA min current enable sub-ppm gas concentration resolution while extending AA battery life beyond 12 months. |
| Industrial Process Transmitters | Medical Wearable ECG Front-Ends |
Use Scenario: 4–20 mA loop-powered pressure transmitter installed in oil & gas pipeline monitoring systems. IC Role / Device Role / Timing Role: Serves as shunt reference for DAC-controlled current output stage and sensor excitation circuitry. Use Value: Long-term stability (120 ppm/1000 hrs) and thermal hysteresis (0.08%) minimize recalibration intervals in inaccessible field installations. |
Use Scenario: Ultra-low-power chest-worn ECG patch with integrated analog signal chain and Bluetooth LE radio. IC Role / Device Role / Timing Role: Generates clean 1.225 V reference for instrumentation amplifier gain-setting and ADC conversion. Use Value: SC70-5 package and micropower operation allow integration into <3 cm² PCB area while achieving >7-day continuous operation on 120 mAh battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041CIM7X-1.2 | ±6 mV (±0.5%) initial tolerance at 25°C; same SC70-5 package and −40°C to +125°C range | Higher accuracy required in precision calibration equipment where ±0.5% tolerance reduces system-level error budget | Select when tighter initial accuracy justifies higher unit cost and test overhead; identical layout and drive capability |
| TLVH431ACDBVR | Adjustable 1.24–18 V output; 2% initial tolerance; SOT-23-3 package; 80 ppm/°C TC; requires external resistors | Used where programmable reference voltage or higher output flexibility is needed, e.g., variable gain stages or multi-range sensors | Choose when design requires voltage adjustability or compatibility with legacy TLVH431 footprints; adds two external resistors |
Compared with LM4041CIM7X-1.2, the LM4041EIM7X-1.2 trades initial accuracy for lower cost and qualification consistency in high-volume automotive applications; versus TLVH431ACDBVR, it offers fixed-voltage simplicity, lower noise, and guaranteed stability without external components - making it optimal for space- and noise-sensitive fixed-reference roles.
Availability
LM4041EIM7X-1.2 is available at Aetrix Electronics and suitable for automotive cabin sensors, portable gas analyzers, industrial process transmitters, and medical wearable ECG front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041EIM7X-1.2 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-grade qualification.
The LM4041-N-Q1 product line was engineered specifically for safety-critical automotive subsystems and industrial applications demanding robustness across extreme temperatures, low power, and long-term stability - exemplified by the LM4041EIM7X-1.2's AEC-Q100 Grade 1 certification and 120 ppm long-term drift.
FAQ
What is the maximum operating temperature range for the LM4041EIM7X-1.2?
The LM4041EIM7X-1.2 is rated for operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This extended range is validated across all electrical parameters in the datasheet's "Extended Temperature Range" tables, including reverse breakdown voltage tolerance and temperature coefficient specifications.
Does the LM4041EIM7X-1.2 require an external output capacitor?
No, the LM4041EIM7X-1.2 does not require an external output capacitor. Its internal design ensures stability with any capacitive load, including values up to 10 μF, eliminating the need for additional components and simplifying layout in space-constrained designs such as wearable medical devices.
What is the meaning of the 'E' grade in LM4041EIM7X-1.2?
The 'E' grade in LM4041EIM7X-1.2 denotes an initial reverse breakdown voltage tolerance of ±2.0% (±25 mV) at 25°C. This grade balances cost and performance for applications where moderate accuracy suffices, such as non-critical sensor biasing or industrial monitoring systems with digital calibration.
Can the LM4041EIM7X-1.2 be used in place of the adjustable LM4041AIM3X-ADJ?
No - the LM4041EIM7X-1.2 is a fixed 1.225 V shunt reference with pins 1, 4, and 5 designated as no-connect. The LM4041AIM3X-ADJ uses a different pinout (SOT-23-3) and requires external resistors on the FB pin to set output voltage; they are not functionally or pin-compatible replacements.
What is the typical noise performance of the LM4041EIM7X-1.2?
The LM4041EIM7X-1.2 delivers 20 μVrms wideband noise over 10 Hz to 10 kHz, measured at 100 μA operating current. This low-noise characteristic supports high-resolution data acquisition systems, including 16-bit ADCs in portable instrumentation where reference noise directly impacts effective number of bits (ENOB).
LM4041EIM7X-1.2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- Current - Output:
- 12 mA
- Tolerance:
- ±2%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 20µVrms
- 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
LM4041EIM7X-1.2 FAQ
1.How can I place an order for LM4041EIM7X-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041EIM7X-1.2 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 LM4041EIM7X-1.2 reliable?
The price and inventory of LM4041EIM7X-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041EIM7X-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041EIM7X-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041EIM7X-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041EIM7X-1.2?
LM4041EIM7X-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041EIM7X-1.2 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 LM4041EIM7X-1.2?
For technical support, including LM4041EIM7X-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041EIM7X-1.2 requirements.
6.How does Aetrix verify that LM4041EIM7X-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041EIM7X-1.2 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 LM4041EIM7X-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041EIM7X-1.2?
All LM4041EIM7X-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041EIM7X-1.2, 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 LM4041EIM7X-1.2 part is unused and in its original packaging.
Return procedure for LM4041EIM7X-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041EIM7X-1.2 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
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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
Texas Instruments
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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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