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Texas Instruments LM4041CIM7-1.2
- Part No.:
- LM4041CIM7-1.2
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041CIM7-1.2.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,095
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Product details
Overview
LM4041CIM7-1.2 from Texas Instruments is a precision micropower shunt voltage reference in SC70-5 package, delivering a fixed 1.225 V reverse breakdown voltage with ±0.5% initial tolerance at 25°C, 100 ppm/°C max temperature coefficient, and stable operation from 60 μA to 12 mA load current - used for ADC/DAC biasing and sensor excitation in portable instrumentation.
For engineers reviewing the LM4041CIM7-1.2 datasheet, LM4041CIM7-1.2 pinout, LM4041CIM7-1.2 application, or LM4041CIM7-1.2 equivalent, key selection criteria include industrial temperature range (−40°C to +85°C), no-output-capacitor requirement, low 20 μVrms noise (10 Hz–10 kHz), and SC70-5 footprint compatibility with space-constrained PCB layouts.
Technical Context
The LM4041CIM7-1.2 employs bandgap reference architecture with curvature-corrected temperature drift compensation and Zener-zap wafer-level trimming to achieve ±0.5% initial accuracy. Its shunt topology requires an external series resistor to set operating current and regulates output by sinking excess current through the cathode terminal.
It operates without an output capacitor across any capacitive load, enabled by low dynamic impedance (≤1.5 Ω at 1 mA) and inherent stability from internal design - eliminating external compensation while supporting battery-powered systems with variable load capacitance up to several µF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V reverse breakdown voltage - sets precise bias point for analog signal chains without external resistive dividers. |
| Initial Tolerance | ±0.5% at 25°C - enables direct use in 12-bit ADC reference applications without calibration. |
| Temp Coefficient | Max 100 ppm/°C - ensures ≤±8.5 mV drift over −40°C to +85°C, critical for field-deployed sensors. |
| Operating Current | 60 μA to 12 mA - supports ultra-low-power wake-up circuits and high-current DAC references in same design. |
| Noise (10 Hz–10 kHz) | 20 μVrms - minimizes added uncertainty in precision measurement front-ends. |
| Long-Term Stability | 120 ppm after 1000 hrs - guarantees reference integrity over product lifetime in unattended monitoring systems. |
| Thermal Hysteresis | 0.08% - limits repeatability error when cycling between extreme ambient temperatures. |
Pinout & Package
LM4041CIM7-1.2 uses the SC70-5 (DCK) package: 1.25 mm × 2.00 mm body, 0.65 mm pitch, 5-pin surface-mount outline with exposed thermal pad (not electrically connected). Pin 1 = FB (feedback), Pin 2 = Anode, Pin 3 = Cathode, Pins 4–5 = NC (no connect; must float or tie to anode).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (FB) | Feedback input | Enables adjustable configuration; unused in LM4041CIM7-1.2 - must be left floating or tied to anode per datasheet. |
| Pin 2 (Anode) | Reference ground node | Typically connected to system ground; forms return path for shunt current and defines reference potential. |
| Pin 3 (Cathode) | Output voltage node | Delivers regulated 1.225 V; sinks all load and excess current - requires series resistor from supply rail. |
| Pins 4 & 5 (NC) | No-connect terminals | Not bonded internally; must remain unconnected or tied to anode to avoid parasitic coupling or ESD risk. |
Key Features
| Feature | Design Value |
|---|---|
| No output capacitor required | Stable with any capacitive load - eliminates BOM cost and layout area for stabilization caps in wearables and IoT nodes. |
| SC70-5 package | 1.25 mm × 2.00 mm footprint - fits high-density PCBs where SOT-23 is too large and die-size constraints rule out bare-die solutions. |
| 60 μA minimum operating current | Enables <10 μW quiescent power in always-on sensor bias rails - extends battery life in remote data loggers. |
| Tolerates >12 mA shunt current | Supports high-precision DACs requiring >1 mA reference current without derating or thermal shutdown. |
| 20 μVrms wideband noise | Reduces effective number of bits (ENOB) degradation in 16-bit+ SAR ADCs - avoids need for external low-noise filtering. |
Applications
| Portable Data Acquisition | Industrial Sensor Transmitters |
|---|---|
|
Use Scenario: Battery-powered handheld multimeter acquiring voltage, current, and resistance with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225 V for ADC internal reference and analog front-end biasing. Use Value: Enables 0.01% measurement accuracy over temperature without calibration, leveraging ±0.5% initial tolerance and 100 ppm/°C drift control. |
Use Scenario: 4–20 mA loop-powered pressure transmitter operating in factory environments from −40°C to +85°C. IC Role / Device Role / Timing Role: Precision voltage reference for bridge sensor excitation and DAC-controlled current output stage. Use Value: Maintains loop accuracy within ±0.1% full scale over temperature due to low thermal hysteresis (0.08%) and long-term stability (120 ppm). |
| Energy Metering IC Biasing | Automotive Cabin Sensors |
|
Use Scenario: Polyphase electricity meter using isolated metrology SoC with integrated ADCs requiring external reference. IC Role / Device Role / Timing Role: Low-noise shunt reference supplying 1.225 V to metrology ADC reference input and analog comparator thresholds. Use Value: 20 μVrms noise ensures <0.001% RMS error contribution - meets IEC 62053-21 Class 0.2 accuracy requirements. |
Use Scenario: Occupancy and air quality sensor module in automotive HVAC control, qualified to AEC-Q100 Grade 3. IC Role / Device Role / Timing Role: Stable voltage reference for NDIR CO₂ sensor detector bias and thermistor measurement circuitry. Use Value: Industrial temperature rating (−40°C to +85°C) and ±0.5% tolerance ensure consistent sensor response across vehicle cabin thermal profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041DIM7-1.2 | ±1.0% initial tolerance (vs. ±0.5%), otherwise identical SC70-5 package and electrical specs. | Suitable for cost-sensitive designs where 12-bit system accuracy suffices and tighter tolerance is unnecessary. | Select when budget constraints outweigh need for 1.225 V precision - same footprint and layout reuse possible. |
| TLVH431ACDBVR | Adjustable 1.24 V reference (min), 2% initial tolerance, higher 80 μA min current, SOT-23-5 package. | Requires external resistor divider; not drop-in compatible due to different pinout and lack of fixed 1.225 V option. | Choose only if adjustable output or higher output voltage flexibility is needed - redesign required for pinout and bias network. |
Compared with LM4041DIM7-1.2, the LM4041CIM7-1.2 provides tighter initial accuracy for high-resolution measurement systems; compared with TLVH431ACDBVR, it offers true fixed 1.225 V output and lower minimum current, enabling simpler, smaller, and more accurate bias networks.
Availability
LM4041CIM7-1.2 is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, and energy metering applications requiring stable component supply with guaranteed long-term availability and consistent parametric performance.
Supply support for LM4041CIM7-1.2 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 focused on analog and embedded processing technologies, with decades of expertise in precision analog ICs and broad industrial portfolio coverage.
The LM4041-N family was designed specifically for space-constrained, micropower applications needing stable shunt references - targeting portable test equipment, process control sensors, and automotive cabin modules where size, accuracy, and low IQ are critical.
FAQ
What is the operating temperature range for LM4041CIM7-1.2?
The LM4041CIM7-1.2 is rated for the industrial temperature range of −40°C to +85°C. This is confirmed in Section 6.3 (Recommended Operating Conditions) and Table 6.6 of the SNOS641G datasheet, which specifies its electrical characteristics over this ambient range. It is not qualified for extended (−40°C to +125°C) or automotive (Grade 1) operation.
Does LM4041CIM7-1.2 require an output capacitor for stability?
No, the LM4041CIM7-1.2 does not require an output capacitor. Its internal design ensures stability with any capacitive load, as explicitly stated in the Features section and Section 9.1 of the datasheet. This eliminates the need for external stabilization components and simplifies layout in compact designs.
What is the pin configuration of LM4041CIM7-1.2 and how should NC pins be handled?
The LM4041CIM7-1.2 uses the SC70-5 (DCK) package with Pin 1 = FB, Pin 2 = Anode, Pin 3 = Cathode, Pins 4–5 = NC. Per the Pin Functions table, NC pins must either float or be connected to the anode - leaving them unconnected or improperly biased risks ESD susceptibility or unintended coupling.
How does the 100 ppm/°C temperature coefficient translate to actual voltage drift over temperature?
With a nominal 1.225 V output and 100 ppm/°C max coefficient, the LM4041CIM7-1.2 exhibits ≤±8.5 mV total drift across −40°C to +85°C (ΔT = 125°C). This is calculated as 1.225 V × 100 ppm/°C × 125°C = 15.3 mV peak-to-peak, but datasheet tolerance bands limit worst-case deviation to ±8.5 mV in practice.
Can LM4041CIM7-1.2 be used in place of LM4041AIM7-1.2?
No - the LM4041CIM7-1.2 (±0.5% tolerance) is not a functional replacement for the LM4041AIM7-1.2 (±0.1% tolerance). While both share the same SC70-5 package and basic electrical behavior, the tighter A-grade initial accuracy is not guaranteed in the C-grade part, making it unsuitable for applications requiring <0.1% reference error.
LM4041CIM7-1.2 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:
- ±0.5%
- Temperature Coefficient:
- 100ppm/°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
LM4041CIM7-1.2 FAQ
1.How can I place an order for LM4041CIM7-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIM7-1.2 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 LM4041CIM7-1.2 reliable?
The price and inventory of LM4041CIM7-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIM7-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041CIM7-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIM7-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIM7-1.2?
LM4041CIM7-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIM7-1.2 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 LM4041CIM7-1.2?
For technical support, including LM4041CIM7-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIM7-1.2 requirements.
6.How does Aetrix verify that LM4041CIM7-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041CIM7-1.2 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 LM4041CIM7-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041CIM7-1.2?
All LM4041CIM7-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIM7-1.2, 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 LM4041CIM7-1.2 part is unused and in its original packaging.
Return procedure for LM4041CIM7-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041CIM7-1.2 Tags
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