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Texas Instruments LM4041C12IDCKR
- Part No.:
- LM4041C12IDCKR
- Manufacturer:
- Texas Instruments
- Category:
- Voltage Reference
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
LM4041C12IDCKR.pdf
- Description:
- IC VREF SHUNT 0.5% SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,039
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Product details
Overview
LM4041C12IDCKR from Texas Instruments is a precision micropower shunt voltage reference with fixed 1.225 V output, ±0.5% initial tolerance (C grade), 100 ppm/°C max temperature coefficient, and 20 μVRMS wideband noise. It operates from 45 μA to 12 mA cathode current and is stable with all capacitive loads-used in high-accuracy analog front-ends of portable data-acquisition systems.
For engineers reviewing the LM4041C12IDCKR datasheet, LM4041C12IDCKR pinout, LM4041C12IDCKR application, or LM4041C12IDCKR equivalent, key selection criteria include output stability over –40°C to +85°C, low-noise performance in battery-powered instrumentation, and SC-70 package compatibility with space-constrained PCB layouts.
Technical Context
The LM4041C12IDCKR implements a Zener-based shunt reference architecture trimmed via Zener-zap during wafer sort to achieve ±0.5% output tolerance at 25°C. Its dynamic impedance remains ≤1.5 Ω at 1 mA, enabling tight regulation under varying load currents without external compensation.
It features a dedicated feedback (FB) pin only in adjustable variants; the LM4041C12IDCKR is fixed-output and uses a 5-pin SC-70 package where pins 1 and 5 are no-connect, pin 2 is anode (ground), pin 3 is cathode (output), and pin 4 is unused-configured as a two-terminal device in circuit operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.225 V nominal; enables direct replacement of legacy 1.2 V references in ADC/DAC bias networks. |
| Initial Tolerance | ±0.5% at 25°C (C grade); ensures ≤6.1 mV absolute error in precision sensor signal conditioning. |
| Temp Coefficient | Max 100 ppm/°C over –40°C to +85°C; contributes ≤10.3 mV drift across full industrial range. |
| Noise (10 Hz–10 kHz) | 20 μVRMS; supports 16-bit+ resolution in low-frequency measurement systems without added filtering. |
| Operating Current | 45 μA (min) to 12 mA (max); allows use in ultra-low-power wake-up circuits and high-current reference buffers. |
| Dynamic Impedance | ≤1.5 Ω at 1 mA; maintains <1.5 mV output shift per 1 mA load transients in power-supply monitor feedback loops. |
| Long-Term Stability | 120 ppm after 1000 h; guarantees <0.15 mV drift over 1 year in metering applications. |
Pinout & Package
LM4041C12IDCKR is packaged in a 5-pin SC-70 (DCK) outline, with pin 1 and pin 5 designated as no-connect (NC), pin 2 as anode (ground), pin 3 as cathode (output voltage node), and pin 4 unused. The device functions as a two-terminal shunt reference; pin 2 must be connected to system ground, and pin 3 delivers the regulated 1.225 V output referenced to that ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | No-connect | Must remain unconnected or tied to pin 2 (anode); floating NC avoids parasitic coupling in EMI-sensitive layouts. |
| Pin 2 | Anode | Ground reference terminal; all internal circuitry referenced to this node; requires low-impedance connection to system AGND. |
| Pin 3 | Cathode | Output terminal delivering 1.225 V; sinks cathode current (IZ) and supplies reference voltage to external divider or load. |
| Pin 4 | No-connect | Internally unconnected; leave unpopulated on PCB to prevent solder bridging or contamination-induced leakage. |
| Pin 5 | No-connect | Same as pin 1; verified NC per TI DCK package drawing SLCS146H; no functional role in fixed-output configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Zero-output-capacitor stability | Operates without external bypass capacitor-reduces BOM count and board area in space-constrained IoT sensor nodes. |
| Wide cathode current range | 45 μA to 12 mA operation enables single-part support for both nanoamp sleep-mode monitoring and 10 mA reference buffering. |
| Low 10–10 kHz noise | 20 μVRMS noise floor preserves SNR in 24-bit delta-sigma ADCs used in precision energy metering. |
| Industrial temperature range | Specified from –40°C to +85°C; qualified for deployment in outdoor industrial controllers and automotive cabin modules. |
| SC-70 footprint | 1.25 mm × 2.1 mm body size fits 0402-class routing density-ideal for wearable medical devices and compact test equipment. |
Applications
| Data-Acquisition Systems | Power-Supply Monitors |
|---|---|
Use Scenario: High-resolution ADC front-end in portable multimeters requiring stable reference under varying battery voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.225 V reference to SAR ADC's internal DAC and external gain stages. Use Value: ±0.5% tolerance and 100 ppm/°C TC ensure <0.01% full-scale error drift across operating temperature, meeting Class A metering accuracy. | Use Scenario: Overvoltage/undervoltage detection in 12 V automotive subsystems powered by lead-acid batteries. IC Role / Device Role / Timing Role: Precision threshold reference for comparator-based supply supervision circuits. Use Value: Low 20 μVRMS noise prevents false triggering during engine cranking transients; 45 μA min current enables direct resistor-divider bias from 12 V rail. |
| Instrumentation & Test Equipment | Battery-Powered Equipment |
Use Scenario: Calibration reference in handheld oscilloscope vertical amplifiers requiring traceable DC offset stability. IC Role / Device Role / Timing Role: Primary DC reference source for auto-zero and offset correction loops in programmable gain instrumentation amplifiers. Use Value: 120 ppm long-term stability ensures calibration validity for ≥6 months between lab recalibrations, reducing maintenance cost. | Use Scenario: Reference for gas sensor analog signal chain in wireless CO detectors powered by CR2032 coin cells. IC Role / Device Role / Timing Role: Low-quiescent-current shunt reference establishing baseline for electrochemical sensor transimpedance amplifier. Use Value: 45 μA minimum operating current extends battery life beyond 2 years while maintaining ±0.5% accuracy at end-of-life voltage (2.0 V). |
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 1.24 V reference; ±0.5% tolerance; 100 ppm/°C TC; SOT-23-3 package; requires external resistors for 1.225 V setting. | Needs resistor network to match 1.225 V; higher 25 μVRMS noise; lacks SC-70 option. | Select when board redesign allows 3-pin SOT-23 and adjustable output flexibility is preferred over fixed 1.225 V. |
| MAX6008AEUR+T | Fixed 1.225 V; ±0.2% tolerance (A grade); 75 ppm/°C TC; SC-70-5 package; 50 μA min current. | Tighter initial tolerance and lower TC but higher minimum current limits use in sub-50 μA sleep modes. | Choose for highest accuracy in industrial PLC I/O modules where supply headroom permits ≥50 μA bias current. |
Compared with TLV431ACDBVR and MAX6008AEUR+T, LM4041C12IDCKR offers optimal balance of fixed 1.225 V output, SC-70 packaging, 45 μA operation, and proven long-term stability-making it ideal for cost-sensitive, space-constrained, and battery-life-critical designs where exact 1.225 V matching is required without external components.
Availability
LM4041C12IDCKR 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 availability and consistent parametric performance.
Supply support for LM4041C12IDCKR 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and broad industrial portfolio coverage.
The LM4041 product line delivers micropower shunt voltage references optimized for accuracy, low noise, and minimal board space-designed specifically for portable instrumentation, energy metering, and automotive subsystems demanding stable DC references.
FAQ
What is the output voltage tolerance of LM4041C12IDCKR at 25°C?
The LM4041C12IDCKR has a fixed output voltage of 1.225 V with ±0.5% initial tolerance at 25°C, corresponding to a maximum deviation of ±6.125 mV. This C-grade specification is confirmed in Section 5.5 of the TI datasheet SLCS146H and applies across the full operating current range from 45 μA to 12 mA.
Does LM4041C12IDCKR require an output capacitor for stability?
No, LM4041C12IDCKR does not require an output capacitor for stability. As stated in Section 7.1 of the datasheet, it is designed to remain stable with all capacitive loads-including zero capacitance-and adding one is optional for noise filtering only. This eliminates BOM cost and layout complexity in compact designs.
What is the operating temperature range for LM4041C12IDCKR?
LM4041C12IDCKR is characterized for operation from –40°C to +85°C (industrial temperature grade). This range is explicitly defined in Section 3 (Description) and Table 5.5 of the TI datasheet SLCS146H, and applies to all electrical specifications including tolerance, temperature coefficient, and dynamic impedance.
How many pins of the SC-70 package are functional in LM4041C12IDCKR?
In the LM4041C12IDCKR's 5-pin SC-70 (DCK) package, only two pins are functional: pin 2 (anode, grounded) and pin 3 (cathode, 1.225 V output). Pins 1, 4, and 5 are no-connect (NC) terminals-verified in Figure 4-2 and Pin Functions table of the datasheet-and must remain unconnected or tied to pin 2 per TI recommendation.
What is the minimum cathode current required for LM4041C12IDCKR to regulate properly?
The LM4041C12IDCKR requires a minimum cathode current of 45 μA (typical) at 25°C to maintain regulation, as specified in Table 5.5. At full temperature range (–40°C to +85°C), the guaranteed minimum is 80 μA-critical for designing bias resistors in low-power sensor interfaces where supply current must stay below 100 μA.
LM4041C12IDCKR 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):
- 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:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
LM4041C12IDCKR FAQ
1.How can I place an order for LM4041C12IDCKR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041C12IDCKR 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 LM4041C12IDCKR reliable?
The price and inventory of LM4041C12IDCKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041C12IDCKR is usually 5 days.
3.What payment methods are accepted for LM4041C12IDCKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041C12IDCKR transactions.
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4.How is shipping managed for LM4041C12IDCKR?
LM4041C12IDCKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041C12IDCKR 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 LM4041C12IDCKR?
For technical support, including LM4041C12IDCKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041C12IDCKR requirements.
6.How does Aetrix verify that LM4041C12IDCKR is sourced from the original manufacturer or authorized distributors?
All LM4041C12IDCKR 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 LM4041C12IDCKR meets industry standards.
7.What is the process for return or replacement of LM4041C12IDCKR?
All LM4041C12IDCKR units undergo pre-shipment inspection (PSI). If there is an issue with LM4041C12IDCKR, 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 LM4041C12IDCKR part is unused and in its original packaging.
Return procedure for LM4041C12IDCKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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