My Inquiry
My Account
Analog Devices Inc./Maxim Integrated LM4040AIM3-4.1+T
- Part No.:
- LM4040AIM3-4.1+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
LM4040AIM3-4.1+T.pdf
- Description:
- IC VREF SHUNT 0.1% SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:15,338
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040AIM3-4.1+T from Maxim Integrated is a precision 4.096V two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±100ppm/°C temperature coefficient, and stable operation from 60μA to 15mA shunt current. It delivers low 64µVRMS wideband noise (10Hz–10kHz) and requires no output capacitor, making it ideal for high-accuracy ADC/DAC biasing in portable instrumentation.
For engineers reviewing the LM4040AIM3-4.1+T datasheet, LM4040AIM3-4.1+T pinout, LM4040AIM3-4.1+T application, or LM4040AIM3-4.1+T equivalent, key selection criteria include guaranteed -40°C to +85°C operation, SC70-3 footprint compatibility, reverse-breakdown voltage tolerance of ±4.1mV at +25°C, and dynamic impedance ≤1.0Ω at 1mA.
Technical Context
The LM4040AIM3-4.1+T uses laser-trimmed bandgap circuitry to maintain a precise 4.096V reverse breakdown voltage across its cathode-anode terminals. Its internal architecture eliminates need for external stabilization while tolerating any capacitive load - a critical advantage over series references in space-constrained designs.
It operates as a two-terminal shunt device: current flows from cathode to anode under reverse bias, with regulation achieved by sinking variable current through an external series resistor. Minimum operating current is 73μA, and maximum shunt current is limited to 20mA absolute rating to prevent junction overheating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.096V nominal; ±4.1mV tolerance at +25°C ensures <0.1% error in 12-bit ADC reference applications |
| Initial Accuracy | 0.1% (Grade A); enables single-point calibration elimination in factory-trimmed sensor signal chains |
| Temp Coefficient | ±100ppm/°C max; contributes ≤±6.5mV drift over -40°C to +85°C, supporting industrial-grade stability |
| Shunt Current Range | 73μA to 15mA; allows design flexibility with high-impedance bias networks or low-dropout regulator feedback |
| Dynamic Impedance | ≤1.0Ω at 1mA; maintains voltage regulation within ±10mV during 1mA load transients |
| Wideband Noise | 64µVRMS (10Hz–10kHz); meets SNR requirements for 16-bit SAR ADCs without additional filtering |
| Long-Term Stability | 120ppm after 1000h; supports >10-year calibration intervals in medical monitoring equipment |
Pinout & Package
LM4040AIM3-4.1+T is housed in a RoHS-compliant 3-pin SC70 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23 equivalents. Pin 3 is NC and must remain unconnected or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode | Reverse-bias input terminal; connects to higher-potential node (e.g., supply rail via series resistor) |
| 2 (–) | Anode | Reference ground node; ties to system ground or ADC reference low |
| 3 (N.C.) | No Connection | Must be left floating or shorted to pin 2; no internal connection - violation causes parametric shift |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB space vs. SOT23, enabling dense portable PCB layouts |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout risk from external C |
| Low micropower operation | 60μA minimum shunt current enables battery life extension in always-on IoT sensors |
| AEC-Q100 not qualified | Rated for commercial/industrial use only (-40°C to +85°C); not validated for automotive underhood environments |
| Laser-trimmed precision | 0.1% initial accuracy achieved via on-die resistor trimming - no external calibration needed |
Applications
| Portable Data Acquisition | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered handheld multimeter with 16-bit sigma-delta ADC. IC Role / Device Role / Timing Role: Provides stable 4.096V reference for ADC full-scale calibration and ratiometric sensor excitation. Use Value: Enables ±0.001% measurement repeatability over temperature without recalibration, extending field service intervals. | Use Scenario: 4–20mA loop-powered pressure transmitter in factory automation. IC Role / Device Role / Timing Role: Supplies precision reference for DAC generating analog output and for sensor bridge excitation. Use Value: Maintains 0.1% total error budget across -25°C to +70°C ambient, meeting IEC 61000-6-2 immunity requirements. |
| Medical Patient Monitoring | Test & Measurement Equipment |
Use Scenario: Portable ECG front-end with simultaneous 12-channel acquisition. IC Role / Device Role / Timing Role: Delivers low-noise 4.096V reference to multiple SAR ADCs for synchronized sampling. Use Value: 64µVRMS noise ensures ≥78dB SNR, satisfying AAMI EC11 clinical accuracy standards. | Use Scenario: Benchtop digital multimeter requiring 5½-digit resolution. IC Role / Device Role / Timing Role: Serves as primary reference for auto-ranging DC voltage measurement subsystem. Use Value: 120ppm long-term stability reduces annual calibration frequency from quarterly to annually. |
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 | Adjustable 1.24V–18V output; 0.5% initial accuracy; 3-pin SOT23; 30ppm/°C tempco | Requires external resistors to set 4.096V; higher quiescent current (80μA min) | Select when adjustable output or tighter tempco is prioritized over absolute accuracy |
| REF3040AIDBZR | Fixed 4.096V; 0.2% initial accuracy; 3-pin SOT23; 50ppm/°C tempco; series topology | Higher dropout voltage (120mV); requires input capacitor; not shunt-compatible | Select when lower tempco and series architecture simplify power domain isolation |
Compared with TLVH431AIDBZR and REF3040AIDBZR, LM4040AIM3-4.1+T offers superior initial accuracy (0.1% vs. 0.5%/0.2%) and true two-terminal simplicity, but lacks adjustability and has higher tempco - optimal where board space and calibration overhead are critical constraints.
Availability
LM4040AIM3-4.1+T is available at Aetrix Electronics and suitable for portable instrumentation, industrial sensor transmitters, medical patient monitoring, and test & measurement equipment requiring stable component supply with tight voltage tolerance and minimal PCB footprint.
Supply support for LM4040AIM3-4.1+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 and mixed-signal ICs for industrial, medical, and communications systems, emphasizing high accuracy, low power, and small form factor.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-sensitive applications where fixed-output precision and capacitor-free stability are mandatory.
FAQ
What is the exact reverse breakdown voltage specification for LM4040AIM3-4.1+T at +25°C?
The LM4040AIM3-4.1+T has a nominal reverse breakdown voltage of 4.096V at +25°C, with a guaranteed tolerance of ±4.1mV (0.1% of 4.096V). This corresponds to a range of 4.0919V to 4.1001V per the datasheet's Grade A specifications for the 4.096V variant.
Can LM4040AIM3-4.1+T operate without an external capacitor?
Yes, LM4040AIM3-4.1+T is explicitly designed to be stable without any external output capacitor and tolerates arbitrary capacitive loads. This eliminates BOM cost and layout complexity - a key differentiator from series references like REF3040 that require input capacitance for stability.
What is the minimum shunt current required for LM4040AIM3-4.1+T to regulate properly?
The LM4040AIM3-4.1+T requires a minimum shunt current of 73μA to maintain regulation across its full temperature range (-40°C to +85°C). Below this threshold, output voltage deviates beyond specified tolerance; design must ensure worst-case current (e.g., at lowest supply voltage and highest load) remains ≥73μA.
Is LM4040AIM3-4.1+T qualified for automotive applications?
No, LM4040AIM3-4.1+T is rated for -40°C to +85°C operation and is not AEC-Q100 qualified. For automotive use, consider the /V suffix variants (e.g., LM4040AIM3-4.1/V+T), which undergo extended temperature validation and stress testing per AEC-Q100 Rev H.
How does the SC70-3 package of LM4040AIM3-4.1+T compare in size to SOT23-3?
The SC70-3 package used by LM4040AIM3-4.1+T measures 1.8mm × 1.8mm, making it 50% smaller in footprint than standard SOT23-3 packages (2.9mm × 1.6mm). This reduction directly enables higher component density in portable and wearable electronics where board area is at a premium.
LM4040AIM3-4.1+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:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 4.096V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 64µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 73 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
LM4040AIM3-4.1+T FAQ
1.How can I place an order for LM4040AIM3-4.1+T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIM3-4.1+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 LM4040AIM3-4.1+T reliable?
The price and inventory of LM4040AIM3-4.1+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIM3-4.1+T is usually 5 days.
3.What payment methods are accepted for LM4040AIM3-4.1+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIM3-4.1+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIM3-4.1+T?
LM4040AIM3-4.1+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIM3-4.1+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 LM4040AIM3-4.1+T?
For technical support, including LM4040AIM3-4.1+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIM3-4.1+T requirements.
6.How does Aetrix verify that LM4040AIM3-4.1+T is sourced from the original manufacturer or authorized distributors?
All LM4040AIM3-4.1+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 LM4040AIM3-4.1+T meets industry standards.
7.What is the process for return or replacement of LM4040AIM3-4.1+T?
All LM4040AIM3-4.1+T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIM3-4.1+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 LM4040AIM3-4.1+T part is unused and in its original packaging.
Return procedure for LM4040AIM3-4.1+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040AIM3-4.1+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…
