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Analog Devices Inc./Maxim Integrated LM4041CEM3-1.2+T
- Part No.:
- LM4041CEM3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041CEM3-1.2+T.pdf
- Description:
- IC VREF SHUNT 0.5% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:2,084
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Product details
Overview
LM4041CEM3-1.2+T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SOT23-3 package, rated for -40°C to +125°C operation, with 0.5% initial accuracy, 100ppm/°C max temperature coefficient, and 60µA–12mA operating current range-used in battery-powered instrumentation and industrial sensor signal conditioning.
For engineers reviewing the LM4041CEM3-1.2+T datasheet, LM4041CEM3-1.2+T pinout, LM4041CEM3-1.2+T application, or LM4041CEM3-1.2+T equivalent, key selection criteria include guaranteed extended-temperature performance, no-output-capacitor stability, low 20µVRMS noise (10Hz–10kHz), and compatibility with high-impedance bias networks in portable analog front-ends.
Technical Context
The LM4041CEM3-1.2+T implements a bandgap-based shunt reference architecture that maintains a stable 1.225V reverse breakdown voltage across its anode and cathode terminals when biased with 60µA–12mA reverse current. It behaves electrically like a precision Zener diode but with laser-trimmed resistors enabling 0.5% initial accuracy.
Its internal BiCMOS process delivers low dynamic impedance (≤8Ω at 1mA), wideband output noise of 20µVRMS (10Hz–10kHz), and guaranteed stability with any capacitive load-eliminating need for external compensation while supporting fast load-transient response in closed-loop feedback paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage; enables precise ADC/DAC reference and comparator threshold setting without trimming. |
| Initial Accuracy | ±0.5% at +25°C; ensures ≤6.1mV absolute error in 12-bit systems without calibration. |
| Temp Coefficient | 100ppm/°C max over -40°C to +125°C; contributes ≤12.3mV drift across full range, suitable for unheated industrial environments. |
| Operating Current | 60µA to 12mA; supports ultra-low-power sensor nodes and high-current precision DAC buffers. |
| Output Noise | 20µVRMS (10Hz–10kHz); avoids noise-induced quantization errors in 16-bit+ data acquisition. |
| Dynamic Impedance | ≤8Ω at 1mA; minimizes voltage shift under varying load currents in regulated power monitor circuits. |
Pinout & Package
LM4041CEM3-1.2+T uses the industry-standard 3-pin SOT23-3 surface-mount package (1.7mm × 2.9mm × 1.1mm), optimized for automated assembly and thermal performance in space-constrained PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode / Positive Terminal | Connects to system ground or low-impedance return path; forms reference node with Pin 2. |
| 2 (−) | Cathode / Negative Terminal | Active output terminal; sinks shunt current to maintain 1.225V across Pins 1–2. |
| 3 (N.C.) | No Connect | Must be left floating or tied to Pin 2; no internal connection-omitting this risks parametric shift or instability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SOT23-3 footprint | Enables placement adjacent to precision op-amps or ADCs on dense mixed-signal PCBs without routing congestion. |
| No output capacitor required | Eliminates BOM cost and board area for stabilization caps while maintaining stability with >1µF capacitive loads. |
| Capacitive load tolerance | Supports direct connection to ADC input capacitors or long traces without oscillation or settling delay. |
| Low 20µVRMS noise | Preserves SNR in 16-bit SAR ADC references where noise floor must remain <30µVRMS. |
Applications
| Portable Medical Sensors | Industrial 4–20mA Transmitters |
|---|---|
Use Scenario: Battery-powered ECG front-end with rail-to-rail op-amp and 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Shunt reference providing stable 1.225V for ADC VREF and op-amp bias network. Use Value: Enables ±0.5% absolute measurement accuracy over -20°C to +70°C ambient without recalibration. | Use Scenario: Loop-powered pressure transmitter with HART modulation and microcontroller-based signal processing. IC Role / Device Role / Timing Role: Precision voltage reference for current-sense amplifier gain-setting and DAC output scaling. Use Value: Maintains 4–20mA loop accuracy within ±0.1% FSR across -40°C to +85°C industrial temperature range. |
| Automotive Cabin Sensors | Smart Energy Meters |
Use Scenario: Occupancy detection module using thermopile sensor and low-power MCU in vehicle cabin. IC Role / Device Role / Timing Role: Reference source for thermopile signal conditioning amplifier and internal ADC. Use Value: Delivers stable 1.225V with <100ppm/°C drift across -40°C to +125°C engine bay proximity conditions. | Use Scenario: DIN-rail mounted electricity meter with metrology-grade AFE and isolated communication interface. IC Role / Device Role / Timing Role: Primary voltage reference for polyphase energy measurement ICs and anti-tampering comparators. Use Value: Guarantees long-term stability (120ppm/1000h) and low noise to meet IEC 62053-21 Class 0.5 accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431ACDBVR | 2.5V adjustable output (via resistor divider); 0.5% initial accuracy; 90ppm/°C tempco; SOT23-3 package. | Requires external resistors to set 1.225V; higher minimum cathode current (80µA); not drop-in compatible. | Select when system already uses TLVH431 family and flexibility to adjust reference voltage is needed. |
| ADR3412ARJZ-R7 | 1.2V fixed output; 0.1% initial accuracy; 30ppm/°C tempco; SC70-4 package with enable pin. | Higher accuracy and lower drift, but different pin count and package; requires enable logic control. | Select when tighter voltage tolerance and lower temperature drift justify redesigning layout and adding control logic. |
Compared with TLVH431ACDBVR and ADR3412ARJZ-R7, the LM4041CEM3-1.2+T provides true drop-in 1.225V functionality in SOT23-3 with no external components, optimal for cost-sensitive, space-constrained designs requiring guaranteed -40°C to +125°C operation without enable signaling.
Availability
LM4041CEM3-1.2+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial 4–20mA transmitters, and automotive cabin sensors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LM4041CEM3-1.2+T 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
Maxim Integrated is a semiconductor company specializing in analog and mixed-signal ICs for power, sensing, and connectivity applications, now part of Analog Devices.
The LM4041 product line delivers precision micropower shunt references designed for space-constrained, battery-operated, and high-reliability industrial systems demanding stable voltage references without external capacitors.
FAQ
What is the exact output voltage tolerance of LM4041CEM3-1.2+T at +25°C?
The LM4041CEM3-1.2+T has a reverse breakdown voltage of 1.225V with ±0.5% initial accuracy at +25°C, corresponding to a guaranteed range of 1.2189V to 1.2311V per the datasheet's Electrical Characteristics table. This tolerance is laser-trimmed during production and applies specifically to the C-grade variant denoted by the "C" in the part number.
Does LM4041CEM3-1.2+T require an external output capacitor for stability?
No, the LM4041CEM3-1.2+T does not require an external output capacitor for stability. Its internal design ensures unconditional stability with any capacitive load, including direct connection to ADC input capacitors or long PCB traces. This eliminates BOM cost and layout complexity while maintaining regulation integrity across 60µA–12mA operating current.
What is the maximum operating temperature range specified for LM4041CEM3-1.2+T?
The LM4041CEM3-1.2+T is specified for continuous operation from -40°C to +125°C, as confirmed by the "E" suffix in its ordering code (LM4041CEM3-1.2+T) and the Absolute Maximum Ratings table. This extended temperature grade makes it suitable for under-hood automotive, industrial process control, and outdoor sensor applications where ambient temperatures exceed +85°C.
How is Pin 3 used on LM4041CEM3-1.2+T?
Pin 3 of the LM4041CEM3-1.2+T is marked N.C. (No Connect) and must be left floating or connected directly to Pin 2 (cathode). It has no internal connection; tying it elsewhere may cause parametric deviation or instability. This requirement is explicitly stated in the Pin Description section and Top View diagram of the official datasheet.
What is the typical output noise performance of LM4041CEM3-1.2+T?
The LM4041CEM3-1.2+T delivers 20µVRMS wideband noise over the 10Hz to 10kHz frequency range at 100µA operating current. This low-noise specification is critical for high-resolution data acquisition systems, ensuring minimal contribution to total system noise floor when used as a reference for 16-bit+ ADCs or precision comparators.
LM4041CEM3-1.2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- 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:
- 60 µA
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041CEM3-1.2+T FAQ
1.How can I place an order for LM4041CEM3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041CEM3-1.2+T 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 LM4041CEM3-1.2+T reliable?
The price and inventory of LM4041CEM3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041CEM3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041CEM3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041CEM3-1.2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041CEM3-1.2+T?
LM4041CEM3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041CEM3-1.2+T 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 LM4041CEM3-1.2+T?
For technical support, including LM4041CEM3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041CEM3-1.2+T requirements.
6.How does Aetrix verify that LM4041CEM3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041CEM3-1.2+T 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 LM4041CEM3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041CEM3-1.2+T?
All LM4041CEM3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041CEM3-1.2+T, 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 LM4041CEM3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041CEM3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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