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Analog Devices Inc./Maxim Integrated LM4041BIM3-1.2
- Part No.:
- LM4041BIM3-1.2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4041BIM3-1.2.pdf
- Description:
- IC VREF SHUNT 0.2% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:1,286
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Product details
Overview
LM4041BIM3-1.2 from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SOT23-3 package, featuring 0.2% initial accuracy, 100ppm/°C max temperature coefficient, 60µA–12mA operating current range, and 20µVRMS wideband noise (10Hz–10kHz). It serves as a stable reference in low-power analog signal conditioning and ADC/DAC biasing circuits for portable instrumentation.
For engineers reviewing the LM4041BIM3-1.2 datasheet, LM4041BIM3-1.2 pinout, LM4041BIM3-1.2 application, or LM4041BIM3-1.2 equivalent, key selection criteria include guaranteed ±2.4mV reverse breakdown voltage tolerance at +25°C, no-output-capacitor stability, and compatibility with capacitive loads up to 1µF without oscillation.
Technical Context
The LM4041BIM3-1.2 implements a bandgap-based shunt architecture that maintains a fixed 1.225V reverse breakdown voltage across its terminals when biased with 60µA–12mA cathode-to-anode current. Its BiCMOS process enables low dynamic impedance (≤1.5Ω at 1mA) and long-term stability of 120ppm over 1000 hours.
Unlike series references, it requires no input capacitor and tolerates any output capacitance without external compensation. Its temperature drift is bounded by ±0.85% over –40°C to +85°C, combining 0.2% initial error and 100ppm/°C coefficient across the full range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage - sets precise reference level for ADCs, comparators, and sensor interfaces |
| Initial Accuracy | ±0.2% (±2.4mV at +25°C) - enables high-resolution measurement without calibration |
| Temp Coefficient | 100ppm/°C max - ensures ≤±0.85% total voltage deviation across –40°C to +85°C |
| Operating Current | 60µA to 12mA - supports ultra-low-power battery operation and higher-current precision sensing |
| Noise (10Hz–10kHz) | 20µVRMS - minimizes added uncertainty in 12–16-bit data acquisition systems |
| Dynamic Impedance | ≤1.5Ω at 1mA - maintains voltage stability under fast load transients and varying shunt current |
| Long-Term Stability | 120ppm over 1000h - reduces recalibration frequency in industrial monitoring equipment |
Pinout & Package
LM4041BIM3-1.2 uses the standard 3-pin SOT23-3 surface-mount package (1.7mm × 2.9mm × 1.3mm), with top mark FZEC. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet requirement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; forms cathode-to-anode current loop |
| Pin 2 (−) | Cathode (negative terminal) | Reference output node; voltage measured between Pin 2 and Pin 1 is 1.225V |
| Pin 3 (N.C.) | No connection | Must remain unconnected or be shorted to Pin 2; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| No external capacitor required | Stable operation with any output capacitance up to 1µF - eliminates BOM cost and layout area for decoupling caps |
| Ultra-low quiescent current | 60µA minimum operating current - enables use in always-on sensor nodes powered by coin cells |
| Capacitive load tolerance | Stable with >100nF to 1µF output capacitance - supports filtering and EMI suppression without phase margin loss |
| Laser-trimmed accuracy | 0.2% initial tolerance achieved via on-die resistor trimming - avoids post-assembly calibration |
| Wide temperature range | Specified from –40°C to +85°C - suitable for automotive cabin electronics and industrial field devices |
Applications
| Portable Medical Sensors | Notebook System Monitoring |
|---|---|
Use Scenario: Reference for analog front-end of wearable ECG and pulse oximeter modules powered by CR2032 batteries. IC Role / Device Role / Timing Role: Shunt voltage reference providing 1.225V bias to op-amps and SAR ADCs in signal chain. Use Value: 60µA minimum current enables >5-year battery life; 20µVRMS noise preserves SNR in sub-10µV biopotential measurements. | Use Scenario: Precision reference for voltage supervisor ICs and battery fuel gauges in ultrabooks. IC Role / Device Role / Timing Role: Stable 1.225V reference for comparator thresholds and coulomb counter calibration. Use Value: 0.2% initial accuracy and 100ppm/°C TC ensure accurate state-of-charge reporting across ambient temperature swings. |
| Industrial Process Transmitters | Smart Meter Analog Subsystem |
Use Scenario: Reference for 4–20mA loop-powered pressure and temperature transmitters operating at 3.3V supply. IC Role / Device Role / Timing Role: Two-terminal shunt reference sinking variable current to maintain fixed VREF across loop impedance. Use Value: 12mA max shunt current supports full-scale loop compliance; ±2.4mV tolerance meets ANSI/ISA-50.00.01 Class A accuracy. | Use Scenario: Reference for metrology-grade ADCs measuring grid voltage and current in Class 0.5 smart meters. IC Role / Device Role / Timing Role: Primary voltage reference for sigma-delta ADCs sampling at 8kHz with 24-bit resolution. Use Value: 120ppm long-term stability ensures <0.1% meter error accumulation over 10-year field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar shunt voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLVH431AIDBZR | 2.5V adjustable reference (min 1.24V), 0.5% initial accuracy, 100ppm/°C TC, 1mA min current | Requires external resistors for 1.225V setting; higher minimum current increases power draw | Choose when adjustable output or higher voltage headroom is needed; verify resistor tolerance impact on accuracy |
| ADR3412ARJZ-R7 | 1.2V series reference, 0.1% initial accuracy, 30ppm/°C TC, 120µA typical quiescent current | Three-terminal architecture requires input capacitor; not compatible with shunt-based loop designs | Prefer for low-drift, low-noise applications where series topology and PCB space allow |
Compared with TLVH431AIDBZR and ADR3412ARJZ-R7, the LM4041BIM3-1.2 offers true two-terminal simplicity, lowest minimum current (60µA), and guaranteed 1.225V output without external components-making it optimal for space-constrained, ultra-low-power shunt configurations where fixed voltage is acceptable.
Availability
LM4041BIM3-1.2 is available at Aetrix Electronics and suitable for portable medical sensors, notebook system monitoring, and industrial process transmitters requiring stable component supply with consistent parametric performance across production lots.
Supply support for LM4041BIM3-1.2 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
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and computing applications.
The LM4041 family delivers micropower shunt voltage references optimized for space-constrained, battery-operated systems needing stable 1.225V references without external capacitors or trimming.
FAQ
What is the exact output voltage tolerance of LM4041BIM3-1.2 at +25°C?
The LM4041BIM3-1.2 has a reverse breakdown voltage of 1.225V with ±0.2% initial accuracy, corresponding to ±2.4mV tolerance at +25°C. This value is laser-trimmed and guaranteed across all units in the B-grade bin, as confirmed in the Electrical Characteristics table of the Maxim datasheet.
Can LM4041BIM3-1.2 operate without an output capacitor?
Yes, the LM4041BIM3-1.2 does not require an external output capacitor and remains stable with any capacitive load from 0 to 1µF. This is verified in the Applications Information section and Typical Operating Characteristics (Figure LM4041-08), where impedance vs. frequency plots confirm unconditional stability.
What is the minimum operating current for LM4041BIM3-1.2, and why is it critical?
The LM4041BIM3-1.2 requires a minimum shunt current of 60µA to maintain regulation and specified accuracy. Below this threshold, the device exits its active region and output voltage deviates significantly-this is documented in the Absolute Maximum Ratings and Electrical Characteristics tables as IRMIN.
How does the temperature coefficient affect LM4041BIM3-1.2's performance over –40°C to +85°C?
The LM4041BIM3-1.2 has a maximum temperature coefficient of 100ppm/°C. Over the full –40°C to +85°C range (ΔT = 125°C), this contributes ±12.5mV drift, combined with its ±2.4mV initial error to yield a total worst-case tolerance of ±0.85% (±10.4mV) at extremes-per Note 2 in the datasheet.
Is Pin 3 of LM4041BIM3-1.2 functional or optional?
Pin 3 of LM4041BIM3-1.2 is designated N.C. (No Connection) and is not internally bonded. The datasheet explicitly states it must be left floating or connected to Pin 2 (cathode); using it as a signal or ground path will compromise device reliability and specification compliance.
LM4041BIM3-1.2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 1.225V
- Voltage - Output (Max):
- -
- 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:
- 65 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4041BIM3-1.2 FAQ
1.How can I place an order for LM4041BIM3-1.2 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041BIM3-1.2 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 LM4041BIM3-1.2 reliable?
The price and inventory of LM4041BIM3-1.2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041BIM3-1.2 is usually 5 days.
3.What payment methods are accepted for LM4041BIM3-1.2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041BIM3-1.2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041BIM3-1.2?
LM4041BIM3-1.2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041BIM3-1.2 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 LM4041BIM3-1.2?
For technical support, including LM4041BIM3-1.2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041BIM3-1.2 requirements.
6.How does Aetrix verify that LM4041BIM3-1.2 is sourced from the original manufacturer or authorized distributors?
All LM4041BIM3-1.2 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 LM4041BIM3-1.2 meets industry standards.
7.What is the process for return or replacement of LM4041BIM3-1.2?
All LM4041BIM3-1.2 units undergo pre-shipment inspection (PSI). If there is an issue with LM4041BIM3-1.2, 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 LM4041BIM3-1.2 part is unused and in its original packaging.
Return procedure for LM4041BIM3-1.2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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