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Texas Instruments LM4041BIDCKR
- Part No.:
- LM4041BIDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041BIDCKR.pdf
- Description:
- IC VREF SHUNT ADJ 0.2% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,954
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Product details
Overview
LM4041BIDCKR from Texas Instruments is a precision micropower shunt voltage reference in SC-70-5 package, delivering a fixed 1.225 V output with ±0.2% initial tolerance (B grade), 100 ppm/°C max temperature coefficient, 20 μVRMS wideband noise, and stable operation from 45 μA to 12 mA cathode current. It serves as a low-drift, low-noise reference in high-resolution ADC biasing and portable power-supply monitoring circuits.
For engineers reviewing the LM4041BIDCKR datasheet, LM4041BIDCKR pinout, LM4041BIDCKR application, or LM4041BIDCKR equivalent, this page provides verified specifications, SC-70 pin mapping, industrial-grade (–40°C to +85°C) performance data, and validated alternative options for precision analog design.
Technical Context
The LM4041BIDCKR implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve B-grade accuracy. Its feedback (FB) pin enables adjustable configurations, though LM4041BIDCKR is the fixed 1.225 V variant-pin 5 is NC and must float or connect to anode per TI guidance.
It operates without output capacitance, maintains low dynamic impedance (≤1.5 Ω at 1 mA), and delivers stable regulation across capacitive loads up to 1 μF. The SC-70 package supports space-constrained PCB layouts while sustaining full-spec performance over –40°C to +85°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; ±0.2% (±2.4 mV) max tolerance at 25°C ensures accurate ADC reference scaling. |
| Tempco | ≤100 ppm/°C max over –40°C to +85°C; guarantees <±0.85 mV drift across full industrial range. |
| Noise | 20 μVRMS (10 Hz–10 kHz); minimizes quantization error in 16-bit+ data acquisition systems. |
| Cathode Current Range | 45 μA (typ.) to 12 mA; supports ultra-low-power sensor nodes and high-current precision regulators. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains output stability under fast load transients in closed-loop feedback paths. |
| Operating Temp | –40°C to +85°C (industrial grade); qualified for embedded control, metering, and automotive body electronics. |
| Package | SC-70-5 (DCK); 2.0 mm × 1.25 mm footprint with 0.65 mm pitch-ideal for dense analog signal chains. |
Pinout & Package
LM4041BIDCKR uses the 5-pin SC-70 (DCK) package. Pin 5 is no-connect (NC) and must remain floating or tied to anode (Pin 2) per TI ESD and noise mitigation guidance. The device is a fixed-output shunt reference; FB functionality applies only to adjustable variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Ground reference node; connects to system GND; internal Zener cathode return path. |
| 2 | Cathode | Shunt current sink and output node; supplies regulated 1.225 V to external divider or load. |
| 3 | NC | No-connect; must float or tie to Pin 1 (Anode) to suppress EMI coupling in noisy environments. |
| 4 | NC | No-connect; electrically isolated; no internal connection-leave unconnected on PCB. |
| 5 | NC | No-connect; per TI documentation, must float or connect to Pin 1 (Anode) for ESD robustness. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.225 V output | Eliminates external resistor network; reduces BOM count and layout sensitivity in compact designs. |
| 0.2% initial tolerance (B grade) | Enables single-point calibration in production test; avoids trimming circuitry in cost-sensitive instrumentation. |
| No output capacitor required | Reduces component count and board area; simplifies layout for battery-powered devices with tight space constraints. |
| Stable with all capacitive loads | Supports direct connection to ADC input caps or LDO bypass networks without phase-margin risk. |
| Low 20 μVRMS noise | Preserves ENOB in 16-bit SAR ADCs; critical for precision weigh scales and medical front-ends. |
Applications
| Portable Data Loggers | Industrial Process Transmitters |
|---|---|
|
Use Scenario: Battery-powered environmental sensor nodes measuring temperature, humidity, and pressure with 16-bit ADCs. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 1.225 V reference for ADC conversion and sensor excitation. Use Value: 45 μA min operating current extends battery life; 20 μVRMS noise preserves measurement resolution over 10-year field deployment. |
Use Scenario: 4–20 mA loop-powered transmitters converting analog sensor outputs to digital values for PLC interfaces. IC Role / Device Role / Timing Role: Precision reference for DAC output scaling and analog front-end gain calibration. Use Value: ±0.2% tolerance and 100 ppm/°C tempco ensure <0.1% total error across –40°C to +85°C ambient without recalibration. |
| Energy Metering IC Biasing | Automotive Body Control Modules |
|
Use Scenario: Polyphase electricity meters using metrology SoCs requiring ultra-stable reference for RMS and harmonic calculations. IC Role / Device Role / Timing Role: Primary voltage reference for high-accuracy ADCs sampling current and voltage channels simultaneously. Use Value: Low 1.5 Ω dynamic impedance prevents reference droop during fast current-sense pulses; long-term stability <120 ppm ensures 10-year metrology compliance. |
Use Scenario: In-cabin lighting controllers and seat-position sensors needing reliable analog sensing in automotive electrical environments. IC Role / Device Role / Timing Role: Reference source for microcontroller ADC inputs monitoring potentiometer wipers and thermistors. Use Value: Qualified for –40°C to +85°C operation; ESD-rated (±2 kV HBM) withstands automotive assembly line handling and load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM4041C12IDCKR | ±0.5% initial tolerance, same SC-70-5 package and 1.225 V output | Lower accuracy; suitable where cost reduction outweighs calibration overhead | Select when BOM cost is prioritized over factory calibration time and test fixture complexity |
| REF3012AIDBZR | SOT-23-3, 1.2 V output, ±0.2% tolerance, but 50 μVRMS noise and 50 ppm/°C tempco | Higher noise and wider tempco limit use in high-resolution metrology | Choose only if SC-70 footprint is not required and board space allows SOT-23-3 placement |
Compared with LM4041C12IDCKR, LM4041BIDCKR improves initial accuracy by 0.3% and maintains identical noise and thermal performance; versus REF3012AIDBZR, it delivers 2.5× lower noise and tighter tempco in a smaller SC-70 footprint-critical for next-gen portable instrumentation.
Availability
LM4041BIDCKR is available at Aetrix Electronics and suitable for portable data loggers, industrial process transmitters, energy metering IC biasing, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for LM4041BIDCKR 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 reference design and high-volume manufacturing.
The LM4041 series was developed to deliver micropower, low-noise shunt references for space-constrained, battery-operated, and high-accuracy analog systems-emphasizing stability, ease of use, and broad temperature qualification.
FAQ
What is the output voltage and tolerance of LM4041BIDCKR?
The LM4041BIDCKR provides a fixed 1.225 V nominal output voltage with a maximum initial tolerance of ±0.2% (±2.4 mV) at 25°C, corresponding to its B-grade specification. This tolerance holds across the full industrial temperature range of –40°C to +85°C, with guaranteed drift ≤100 ppm/°C. The LM4041BIDCKR does not support adjustable output-it is strictly a fixed-voltage shunt reference.
Does LM4041BIDCKR require an output capacitor for stability?
No, LM4041BIDCKR does not require an output capacitor for stability. It is explicitly designed to remain stable with all capacitive loads-including direct connection to ADC input capacitors or LDO bypass networks-without oscillation or phase-margin degradation. Adding a capacitor is optional and used only for additional noise filtering, not for loop compensation.
What are the SC-70 pin functions for LM4041BIDCKR?
LM4041BIDCKR uses the 5-pin SC-70 (DCK) package: Pin 1 = Anode (ground), Pin 2 = Cathode (1.225 V output), Pins 3 and 4 = NC (no-connect), Pin 5 = NC (must float or connect to Pin 1 per TI ESD guidance). Unlike adjustable variants, LM4041BIDCKR has no functional FB pin-Pins 3–5 are unused and electrically isolated.
How does LM4041BIDCKR compare to LM4041AIDCKR in accuracy?
LM4041BIDCKR offers ±0.2% initial tolerance, while LM4041AIDCKR provides tighter ±0.1% tolerance. Both share identical SC-70-5 packaging, 1.225 V output, 100 ppm/°C max tempco, and 20 μVRMS noise. The A-grade version is selected when absolute reference accuracy is critical-e.g., metrology calibration standards-whereas B-grade balances cost and performance for general-purpose precision analog systems.
Is LM4041BIDCKR suitable for automotive applications?
LM4041BIDCKR is rated for –40°C to +85°C operation and qualified for industrial use, but it is not AEC-Q200 qualified. For non-safety-critical automotive body electronics (e.g., interior lighting controls, seat position sensors), it is commonly deployed. However, for powertrain, ADAS, or safety-relevant subsystems, TI's automotive-grade LM4041Q variants (e.g., LM4041B12IDCKRQ) with –40°C to +125°C rating and AEC-Q200 compliance should be used instead of LM4041BIDCKR.
LM4041BIDCKR 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:
- ±0.2%
- 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
LM4041BIDCKR FAQ
1.How can I place an order for LM4041BIDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIDCKR 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 LM4041BIDCKR reliable?
The price and inventory of LM4041BIDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIDCKR is usually 5 days.
3.What payment methods are accepted for LM4041BIDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIDCKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BIDCKR?
LM4041BIDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIDCKR 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 LM4041BIDCKR?
For technical support, including LM4041BIDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIDCKR requirements.
6.How does Aetrix verify that LM4041BIDCKR is sourced from the original manufacturer or authorized distributors?
All LM4041BIDCKR 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 LM4041BIDCKR meets industry standards.
7.What is the process for return or replacement of LM4041BIDCKR?
All LM4041BIDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIDCKR, 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 LM4041BIDCKR part is unused and in its original packaging.
Return procedure for LM4041BIDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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