My Inquiry
My Account
Analog Devices Inc./Maxim Integrated LM4041AEX3-1.2+T
- Part No.:
- LM4041AEX3-1.2+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4041AEX3-1.2+T.pdf
- Description:
- IC VREF SHUNT 0.1% SC70-3
- Quantity:
- Payment:
- Shipping:
Inventory:4,511
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4041AEX3-1.2+T from Maxim Integrated is a precision 1.225V two-terminal shunt voltage reference in SC70-3 package, rated for -40°C to +125°C operation, with 0.1% initial accuracy, 100ppm/°C max temperature coefficient, and 60µA–12mA operating current range-used in high-reliability industrial sensor signal conditioning and battery-powered analog front-ends.
For engineers reviewing the LM4041AEX3-1.2+T datasheet, LM4041AEX3-1.2+T pinout, LM4041AEX3-1.2+T application, or LM4041AEX3-1.2+T equivalent, key selection criteria include guaranteed extended-temperature performance, ultra-low noise (20µVRMS), no external capacitor requirement, and validated stability under capacitive loads up to 1µF.
Technical Context
The LM4041AEX3-1.2+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 with low dynamic impedance (≤1.5Ω at 1mA) and exhibits ±15ppm/°C typical temperature drift.
No external stabilization capacitor is required due to inherent phase margin design; the device remains stable with any output capacitance, including 1µF ceramic loads. Its BiCMOS process enables 120ppm long-term stability after 1000 hours at 100µA bias current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.225V fixed reverse breakdown voltage, tightly trimmed to ±1.2mV tolerance at +25°C for high-accuracy ADC/DAC biasing. |
| Initial Accuracy | ±0.1% (±1.2mV) at +25°C-enables direct use in 12-bit systems without calibration. |
| Temp Coefficient | ≤100ppm/°C over -40°C to +125°C-ensures ≤±12.3mV total drift across full operating range. |
| Operating Current | 60µA to 12mA shunt current range-supports ultra-low-power sensor nodes and high-current precision regulators. |
| Output Noise | 20µVRMS (10Hz–10kHz)-minimizes quantization error in high-resolution data acquisition. |
| Dynamic Impedance | ≤1.5Ω at 1mA-maintains voltage regulation stability during fast load transients. |
| Long-Term Stability | 120ppm after 1000h-reduces calibration drift in sealed industrial instrumentation. |
Pinout & Package
LM4041AEX3-1.2+T uses the 3-pin SC70-3 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3, with exposed pad not connected internally. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2 per datasheet guidance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Anode (positive terminal) | Connects to system ground or low-impedance return path; defines reference node polarity. |
| 2 (−) | Cathode (negative terminal) | Connected to regulated voltage node; sinks reverse current to maintain 1.225V across terminals. |
| 3 (N.C.) | No-connect terminal | Must remain unconnected or shorted to pin 2; no internal connection-floating state avoids parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% board space vs. SOT23-3-critical for wearables and compact IoT sensors. |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout risk from external COUT. |
| Tolerates capacitive loads | Stable with up to 1µF ceramic output capacitance-enables local filtering without oscillation risk. |
| Wide shunt current range | 60µA minimum ensures operation in µA-level power budgets; 12mA upper limit supports high-precision op-amp biasing. |
| Laser-trimmed accuracy | 0.1% initial tolerance achieved via on-die resistor trimming-avoids post-assembly calibration in production test. |
Applications
| Portable Medical Sensors | Industrial Temperature Transmitters |
|---|---|
Use Scenario: Battery-powered handheld pulse oximeters requiring stable 1.225V reference for analog front-end ADC conversion. IC Role / Device Role / Timing Role: Shunt voltage reference providing precision bias for transimpedance amplifier and 16-bit SAR ADC. Use Value: 0.1% initial accuracy and 20µVRMS noise ensure <±0.5 LSB error over full battery discharge cycle. | Use Scenario: 4–20mA loop-powered RTD temperature transmitters operating in harsh factory environments. IC Role / Device Role / Timing Role: Primary voltage reference for excitation current generation and ratiometric measurement circuitry. Use Value: Guaranteed -40°C to +125°C operation and 100ppm/°C tempco enable ±0.1°C accuracy over full industrial range. |
| Automotive Cabin Pressure Sensors | Smart Energy Meter Reference |
Use Scenario: MEMS-based cabin pressure sensors in automotive HVAC modules requiring AEC-Q200-compatible references. IC Role / Device Role / Timing Role: Stable 1.225V shunt reference for bridge sensor excitation and signal conditioning ASIC biasing. Use Value: Extended temperature rating and 120ppm long-term stability meet automotive reliability requirements without derating. | Use Scenario: Polyphase electricity meters needing metrology-grade reference for 24-bit delta-sigma ADCs. IC Role / Device Role / Timing Role: Precision voltage reference for ADC reference input and calibration DAC feedback path. Use Value: Low 20µVRMS noise and ±1.2mV initial tolerance directly support Class 0.2 meter accuracy certification. |
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 | Adjustable 1.24V reference (2.5V max), 0.5% initial accuracy, 90ppm/°C, SOT23-3 only | Requires external resistors to set 1.225V; lacks guaranteed -40°C to +125°C grade | Select when adjustable output or lower cost is prioritized over fixed 1.225V and extended temperature guarantee. |
| ADR3412ARJZ-R7 | Fixed 1.2V reference, 0.1% accuracy, 30ppm/°C, SC70-5 package, 100µA–15mA range | Higher accuracy and lower tempco but larger 5-pin SC70 footprint and different pinout | Select when tighter 30ppm/°C drift is critical and board space allows 5-pin layout rework. |
Compared with TLVH431ACDBVR and ADR3412ARJZ-R7, the LM4041AEX3-1.2+T uniquely combines fixed 1.225V output, 0.1% accuracy, SC70-3 footprint, and guaranteed -40°C to +125°C operation-making it optimal for space-constrained, high-reliability shunt reference designs where pin count and thermal robustness are decisive.
Availability
LM4041AEX3-1.2+T is available at Aetrix Electronics and suitable for portable medical sensors, industrial temperature transmitters, and automotive cabin pressure sensors requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for LM4041AEX3-1.2+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 (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
The LM4041 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated, and high-temperature applications demanding high initial accuracy and low noise.
FAQ
What is the guaranteed operating temperature range for LM4041AEX3-1.2+T?
The LM4041AEX3-1.2+T is fully specified and guaranteed over -40°C to +125°C ambient temperature. This extended range is confirmed by the "E" suffix in the part number and validated in the Absolute Maximum Ratings and Electrical Characteristics tables, making LM4041AEX3-1.2+T suitable for under-hood automotive and industrial control applications where ambient temperatures exceed +85°C.
Does LM4041AEX3-1.2+T require an external output capacitor for stability?
No, LM4041AEX3-1.2+T does not require an external output capacitor. Its internal design ensures unconditional stability with any capacitive load-including 0pF to 1µF ceramic capacitors-as explicitly stated in the General Description and Applications Information sections. This eliminates BOM cost, PCB area, and potential instability risks associated with capacitor selection.
What is the exact reverse breakdown voltage of LM4041AEX3-1.2+T at +25°C?
The LM4041AEX3-1.2+T has a nominal reverse breakdown voltage of 1.225V at +25°C, with a guaranteed range of 1.2238V to 1.2262V (±0.1% or ±1.2mV). This value is laser-trimmed and documented in the Electrical Characteristics table under "Reverse Breakdown Voltage (VR)" for the "LM4041A (0.1%)" grade.
Can pin 3 of LM4041AEX3-1.2+T be left unconnected?
Yes, pin 3 of LM4041AEX3-1.2+T is designated N.C. (no connect) and must be left floating or connected to pin 2 (cathode) as instructed in the Pin Description and Top View diagram. The datasheet explicitly states "PIN 3 MUST BE LEFT FLOATING OR CONNECTED TO PIN 2", confirming no internal functionality or electrical connection exists for this terminal.
What is the maximum shunt current rating for LM4041AEX3-1.2+T?
The absolute maximum reverse current rating for LM4041AEX3-1.2+T is 20mA, per the Absolute Maximum Ratings table. However, the functional operating range is specified as 60µA to 12mA-beyond which regulation degrades. For reliable long-term operation, shunt current should be kept within 60µA–12mA, with 20mA reserved only for short-duration stress conditions.
LM4041AEX3-1.2+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- 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:
- ±0.1%
- 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:
- SC-70-3
LM4041AEX3-1.2+T FAQ
1.How can I place an order for LM4041AEX3-1.2+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4041AEX3-1.2+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 LM4041AEX3-1.2+T reliable?
The price and inventory of LM4041AEX3-1.2+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4041AEX3-1.2+T is usually 5 days.
3.What payment methods are accepted for LM4041AEX3-1.2+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4041AEX3-1.2+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4041AEX3-1.2+T?
LM4041AEX3-1.2+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4041AEX3-1.2+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 LM4041AEX3-1.2+T?
For technical support, including LM4041AEX3-1.2+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4041AEX3-1.2+T requirements.
6.How does Aetrix verify that LM4041AEX3-1.2+T is sourced from the original manufacturer or authorized distributors?
All LM4041AEX3-1.2+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 LM4041AEX3-1.2+T meets industry standards.
7.What is the process for return or replacement of LM4041AEX3-1.2+T?
All LM4041AEX3-1.2+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4041AEX3-1.2+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 LM4041AEX3-1.2+T part is unused and in its original packaging.
Return procedure for LM4041AEX3-1.2+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4041AEX3-1.2+T Tags
-
TL431AIDBZR
Texas Instruments
-
TL431BQDBZR
Texas Instruments
-
AN431AN-ATRG1
Diodes Incorporated
-
LM4040CYM3-2.5-TR
Microchip Technology
-
LM4040CYM3-4.1-TR
Microchip Technology
-
LM4040EIM3-2.5/NOPB
Texas Instruments
-
AZ431LBNTR-G1
Diodes Incorporated
-
LM4040D20IDBZR
Texas Instruments
-
LM4041DIM3-ADJ/NOPB
Texas Instruments
-
LM4040DIM3X-2.5/NOPB
Texas Instruments
-
LM4040DIM3-2.5/NOPB
Texas Instruments
-
AZ431LANTR-G1
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
