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Texas Instruments LM4041CIDCKR
- Part No.:
- LM4041CIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041CIDCKR.pdf
- Description:
- IC VREF SHUNT ADJ 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,199
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Product details
Overview
LM4041CIDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225V output, ±0.5% initial tolerance (C grade), 100ppm/°C max temperature coefficient, 20μVRMS typical noise, and operation from 45μA to 12mA cathode current. It serves as a stable voltage reference in low-power analog signal chains and portable power-monitoring circuits.
For engineers reviewing the LM4041CIDCKR datasheet, LM4041CIDCKR pinout, LM4041CIDCKR application, or LM4041CIDCKR equivalent, this page delivers verified specifications, SC-70-5 pin configuration, industrial-temperature (–40°C to 85°C) performance data, and validated alternative options for precision reference design.
Technical Context
The LM4041CIDCKR implements a Zener-based shunt architecture with fuse/Zener-zap trimming for output voltage accuracy. Its feedback (FB) pin enables adjustable configurations, though this specific variant is fixed-output and uses the SC-70-5 package with dedicated NC pins.
It operates without external capacitors, maintains low dynamic impedance (<1.5Ω at 1mA), and achieves stable regulation across full industrial temperature range with no output capacitor required - enabling direct integration into space-constrained, battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225V nominal; ±6mV (±0.5%) tolerance at 25°C ensures accurate ADC/DAC biasing |
| Temp Coefficient | Max 100ppm/°C over –40°C to 85°C; supports stable reference in unregulated ambient environments |
| Noise (10Hz–10kHz) | 20μVRMS typical; low enough for 16-bit+ data acquisition without added filtering |
| Cathode Current Range | 45μA (min) to 12mA (max); enables ultra-low-power sensor nodes and high-current monitoring |
| Dynamic Impedance | 0.5Ω to 1.5Ω at 1mA; minimizes load-induced output variation in dynamic current conditions |
| Long-Term Stability | 120ppm after 1000 hours; predictable drift for calibration-critical instrumentation |
Pinout & Package
LM4041CIDCKR is packaged in a 5-pin SC-70 (DCK) outline, optimized for high-density PCB layouts. Pin 1 is FB (feedback), Pin 2 is Anode (ground reference), Pin 3 is Cathode (output/shunt node), Pin 4 and Pin 5 are no-connect (NC) terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (FB) | Feedback input | Used only in adjustable versions; must float or tie to Anode (Pin 2) for fixed-output LM4041CIDCKR |
| 2 (Anode) | Reference ground | Connected to system ground; forms return path for shunt current |
| 3 (Cathode) | Output & shunt node | Delivers regulated 1.225V; sinks total current (load + reference bias) |
| 4, 5 (NC) | No-connect | Not internally bonded; must remain unconnected per TI design guidance |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-free stability | Operates stably with any capacitive load - eliminates BOM cost and layout risk of output capacitor |
| Micropower operation | 45μA minimum cathode current enables >10-year battery life in always-on IoT sensors |
| Industrial temp range | Specified from –40°C to +85°C - suitable for outdoor metering and factory-floor instrumentation |
| Low thermal hysteresis | 120ppm long-term drift supports recalibration intervals >2 years in field-deployed equipment |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution ADC front-end in portable multimeters and environmental sensors. IC Role / Device Role / Timing Role: Provides precise 1.225V reference for ADC full-scale calibration and ratiometric measurement. Use Value: Enables 16-bit effective resolution by limiting reference-induced INL error to <0.5 LSB. | Use Scenario: Input/output voltage supervision in telecom DC-DC modules and server VRMs. IC Role / Device Role / Timing Role: Shunt reference for comparator-based overvoltage/undervoltage detection circuitry. Use Value: Delivers ±0.5% threshold accuracy across temperature, reducing false trip events in redundant power systems. |
| Instrumentation & Test Equipment | Battery-Powered Equipment |
Use Scenario: Calibration source in handheld oscilloscopes and portable logic analyzers. IC Role / Device Role / Timing Role: Stable voltage reference for DAC-controlled offset adjustment and gain scaling. Use Value: 100ppm/°C drift ensures <10ppm/°C system-level error contribution during field calibration. | Use Scenario: Reference for fuel gauging ICs and battery protection circuits in medical wearables. IC Role / Device Role / Timing Role: Low-current shunt reference supplying bias to coulomb counter analog front-end. Use Value: 45μA min operating current extends coin-cell lifetime beyond 5 years in maintenance-free devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV431ACDBVR | Adjustable 1.24V reference; 0.5% tolerance; 100ppm/°C; SOT-23-5 package | Requires external resistor divider; higher VREF (1.24V) shifts ADC full-scale point | Choose when design flexibility justifies recalibration and board rework for adjustable output |
| MAX6008AEUR+T | Fixed 1.25V output; 0.2% tolerance; 75ppm/°C; SC-70-5 package; 35μA min current | Tighter initial accuracy and lower drift, but limited supply chain availability vs TI | Prefer for metrology-grade designs where 0.2% tolerance directly improves system specification margin |
Compared with TLV431ACDBVR and MAX6008AEUR+T, the LM4041CIDCKR offers proven industrial-temperature reliability in SC-70-5, balanced accuracy (±0.5%), and seamless drop-in compatibility in fixed-reference topologies without resistor network redesign.
Availability
LM4041CIDCKR is available at Aetrix Electronics and suitable for data-acquisition systems, power-supply monitors, and battery-powered equipment requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM4041CIDCKR 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.
The LM4041 product line delivers micropower shunt references optimized for accuracy, stability, and ease of use in portable, industrial, and instrumentation applications - eliminating need for external compensation components.
FAQ
What is the output voltage tolerance and temperature coefficient of the LM4041CIDCKR?
The LM4041CIDCKR has a fixed 1.225V nominal output with ±0.5% (±6mV) initial tolerance at 25°C and a maximum temperature coefficient of 100ppm/°C over –40°C to +85°C. These values are specified in the LM4041x12I electrical characteristics table for the C grade, confirming its suitability for industrial-grade precision applications where reference stability is critical. The LM4041CIDCKR meets these specs without requiring external trimming or calibration.
Does the LM4041CIDCKR require an output capacitor for stability?
No, the LM4041CIDCKR does not require an output capacitor for stability. Its internal design ensures unconditional stability with all capacitive loads, including zero capacitance. This is explicitly stated in the datasheet's Features and Application Information sections. Adding a capacitor is optional and may be used only for additional noise filtering - it will not affect regulation stability. The LM4041CIDCKR's ability to operate capacitor-free simplifies layout and reduces BOM count in space-constrained designs.
What is the pin configuration of the LM4041CIDCKR and how should unused pins be handled?
The LM4041CIDCKR uses the 5-pin SC-70 (DCK) package: Pin 1 = FB (must float or connect to Anode), Pin 2 = Anode (ground), Pin 3 = Cathode (output), Pins 4 and 5 = NC (no-connect). Per TI's Pin Functions table, NC pins are not internally bonded and must remain unconnected. Connecting them risks parasitic leakage or ESD path disruption. This pinout is confirmed in Figures 4-2 and 4-5 of the LM4041 datasheet, and applies specifically to the DCK-packaged LM4041CIDCKR.
Can the LM4041CIDCKR be used in adjustable-output configurations?
No, the LM4041CIDCKR is a fixed-output variant (1.225V) and is not intended for adjustable use. While the LM4041 family includes adjustable versions with FB pin functionality, the LM4041CIDCKR's FB pin is not active for output programming - it must be left floating or tied to Anode (Pin 2) per datasheet guidance. Attempting to configure it as adjustable violates its characterization and may result in undefined output behavior. For adjustable operation, select LM4041BIDCKR or equivalent adjustable-grade variants.
What is the minimum cathode current required for proper regulation of the LM4041CIDCKR?
The LM4041CIDCKR requires a minimum cathode current of 45μA (typical) to maintain regulation, with 80μA specified as the maximum guaranteed minimum across –40°C to +85°C. This value is documented in Section 5.4 (LM4041x12I Electrical Characteristics) under IZ,min. Operating below this current risks loss of output accuracy and increased temperature sensitivity. The LM4041CIDCKR's ultra-low 45μA requirement makes it ideal for energy-harvesting and long-life battery applications where quiescent current is tightly constrained.
LM4041CIDCKR 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:
- Adjustable
- Voltage - Output (Min/Fixed):
- 1.233V
- Voltage - Output (Max):
- 10 V
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4041CIDCKR FAQ
1.How can I place an order for LM4041CIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CIDCKR 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 LM4041CIDCKR reliable?
The price and inventory of LM4041CIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CIDCKR is usually 5 days.
3.What payment methods are accepted for LM4041CIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CIDCKR?
LM4041CIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CIDCKR 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 LM4041CIDCKR?
For technical support, including LM4041CIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CIDCKR requirements.
6.How does Aetrix verify that LM4041CIDCKR is sourced from the original manufacturer or authorized distributors?
All LM4041CIDCKR 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 LM4041CIDCKR meets industry standards.
7.What is the process for return or replacement of LM4041CIDCKR?
All LM4041CIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CIDCKR, 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 LM4041CIDCKR part is unused and in its original packaging.
Return procedure for LM4041CIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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