My Inquiry
My Account
Analog Devices Inc./Maxim Integrated LM4040DIX3-5.0
- Part No.:
- LM4040DIX3-5.0
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040DIX3-5.0.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:1,117
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM4040DIX3-5.0 from Maxim Integrated is a precision 5.000V two-terminal shunt voltage reference in SC70-3 package, featuring ±1.0% initial accuracy, ±15ppm/°C temperature coefficient over –40°C to +85°C, 54µA minimum operating current, and 80µVRMS wideband noise (10Hz–10kHz). It delivers stable regulation for analog-to-digital converters and portable power monitoring circuits.
For engineers reviewing the LM4040DIX3-5.0 datasheet, LM4040DIX3-5.0 pinout, LM4040DIX3-5.0 application, or LM4040DIX3-5.0 equivalent, this page provides verified electrical parameters, validated SC70-3 terminal mapping, confirmed shunt-current-dependent voltage stability behavior, and real-world design constraints for battery-powered instrumentation and industrial sensor signal conditioning.
Technical Context
The LM4040DIX3-5.0 implements a bandgap-based shunt reference architecture with laser-trimmed resistors for factory-set 5.000V reverse breakdown voltage. Its BiCMOS process enables low dynamic impedance (0.5–1.5Ω) across 1mA–15mA shunt current while maintaining ±15ppm/°C tempco over full industrial temperature range.
No external capacitor is required for stability-its output remains regulated under any capacitive load due to inherent frequency compensation. The device operates as a two-terminal element: cathode (Pin 1) and anode (Pin 2), with Pin 3 designated N.C. and electrically isolated per datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V nominal reverse breakdown voltage at 100µA, with ±50mV (±1.0%) tolerance at +25°C |
| Initial Accuracy | ±1.0% at +25°C - defines maximum absolute error before temperature or current variation |
| Tempco | ±15ppm/°C - ensures ≤±0.975mV drift over –40°C to +85°C (ΔT = 125°C) |
| Shunt Current Range | 54µA to 15mA - minimum current required for regulation; max current before thermal derating |
| Dynamic Impedance | 0.5Ω (typ) to 1.5Ω (max) at 1mA/120Hz - determines output voltage change per mA load step |
| Wideband Noise | 80µVRMS (10Hz–10kHz) - impacts high-resolution ADC reference performance and sensor signal fidelity |
| Long-Term Stability | 120ppm after 1000 hours - quantifies aging-induced voltage drift in mission-critical systems |
Pinout & Package
LM4040DIX3-5.0 uses the SC70-3 surface-mount package (1.8mm × 1.8mm), 50% smaller than SOT23-3. Pin 3 is unconnected (N.C.) and must be left floating or tied to Pin 2 per datasheet directive.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (+) | Cathode | Reverse-biased terminal; connects to higher-potential node in shunt configuration |
| Pin 2 (−) | Anode | Reference ground node; sinks shunt current to maintain 5.000V across terminals |
| Pin 3 (N.C.) | No Connection | Electrically isolated; must not be used for routing, grounding, or biasing |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area enables placement in space-constrained portable PCBs and wearables |
| No output capacitor required | Guaranteed stability with any capacitive load eliminates BOM cost and layout risk of external C |
| Low 54µA minimum operating current | Enables micropower operation in battery-backed systems with >10-year shelf life |
| 15mA max shunt current capability | Supports regulation into moderate loads without external pass devices or heat sinking |
| 120ppm long-term stability | Reduces calibration frequency in field-deployed test equipment and industrial controllers |
Applications
| Portable Data Loggers | Industrial Sensor Transmitters |
|---|---|
Use Scenario: Battery-powered environmental sensors logging temperature/humidity with 16-bit ADCs over multi-year deployments. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.000V excitation and ADC reference for ratiometric measurements. Use Value: ±1.0% initial accuracy and ±15ppm/°C tempco ensure <±3mV total error across operating temperature, enabling sub-0.1°C measurement resolution. |
Use Scenario: 4–20mA loop-powered pressure transmitters in oil & gas refineries requiring high reliability under thermal cycling. IC Role / Device Role / Timing Role: Precision shunt reference establishing accurate current-loop scaling and sensor bridge excitation voltage. Use Value: 54µA min operating current allows operation down to 3.3V supply rails while maintaining regulation, extending usable loop voltage range. |
| Medical Patient Monitors | Automotive Cabin Sensors |
Use Scenario: Portable ECG modules measuring microvolt-level biopotentials with ultra-low-noise front-end amplifiers. IC Role / Device Role / Timing Role: Low-noise 5.000V reference for high-gain analog signal chain and SAR ADC reference rail. Use Value: 80µVRMS wideband noise (10Hz–10kHz) prevents reference-induced noise floor elevation, preserving SNR in critical diagnostic signals. |
Use Scenario: In-cabin CO₂ and humidity sensors in automotive HVAC systems operating across –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Temperature-stable voltage reference for sensor signal conditioning and microcontroller ADC reference. Use Value: Guaranteed ±15ppm/°C tempco over full automotive temperature range ensures consistent sensor calibration without software compensation. |
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 2.5V–36V shunt reference; 0.5% initial accuracy; requires external resistor divider for 5.0V output | Higher quiescent current (80µA min); less suitable for ultra-low-power battery designs | Choose when programmable output or higher voltage capability (>5.0V) is needed |
| REF3050AIDBZR | 5.0V series reference; 0.2% initial accuracy; 50ppm/°C tempco; requires input-to-output headroom | Series topology demands ≥100mV input margin; incompatible with direct shunt replacement | Choose when low-output-impedance sourcing is required and supply headroom permits series architecture |
Compared with TLVH431ACDBVR and REF3050AIDBZR, LM4040DIX3-5.0 offers smallest footprint, lowest quiescent current, and true two-terminal simplicity-but lacks adjustability or series-source drive strength, making it optimal for fixed-voltage, space- and power-constrained shunt configurations.
Availability
LM4040DIX3-5.0 is available at Aetrix Electronics and suitable for portable data loggers, industrial sensor transmitters, medical patient monitors, and automotive cabin sensors requiring stable component supply with guaranteed long-term availability.
Supply support for LM4040DIX3-5.0 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 applications, emphasizing low-power, high-accuracy performance.
LM4040DIX3-5.0 belongs to the LM4040 family of micropower shunt voltage references engineered for space-constrained, battery-operated systems demanding stable 2.048V–5.000V references without external capacitors.
FAQ
What is the minimum shunt current required for LM4040DIX3-5.0 to regulate properly?
The LM4040DIX3-5.0 requires a minimum shunt current of 54µA to maintain regulation at all temperatures within its –40°C to +85°C operating range. Below this threshold, output voltage deviates beyond specification limits. This value is confirmed in the Electrical Characteristics table for LM4040_I_3-5.0 under "Minimum Operating Current" with IRMIN = 54µA (min) for the D grade.
Can LM4040DIX3-5.0 be used with large output capacitance, such as 10µF ceramic decoupling caps?
Yes, LM4040DIX3-5.0 is explicitly designed to remain stable with any capacitive load-including 10µF ceramic capacitors-without requiring external series resistance or damping components. This is stated in both the General Description ("no output capacitors required") and Applications Information sections, and verified by stability testing across load capacitance ranges in the Typical Operating Characteristics.
Is Pin 3 of LM4040DIX3-5.0 internally connected or should it be left floating?
Pin 3 of LM4040DIX3-5.0 is designated N.C. (No Connection) and is electrically isolated from the die. Per the Pin Description section and Top View diagram, it must be left floating or connected to Pin 2 (anode); it must never be connected to any other net, including ground or supply rails, as doing so may compromise regulation or reliability.
How does the temperature coefficient of LM4040DIX3-5.0 affect its output voltage across –40°C to +85°C?
LM4040DIX3-5.0 has a guaranteed temperature coefficient of ±15ppm/°C. Over the full –40°C to +85°C range (ΔT = 125°C), this results in a maximum voltage drift of ±1.875mV (±15ppm × 5.000V × 125). This drift is additive to the ±50mV initial tolerance, yielding a worst-case total error of ±51.875mV at temperature extremes.
What is the wideband noise specification for LM4040DIX3-5.0, and how is it measured?
LM4040DIX3-5.0 exhibits 80µVRMS wideband noise over the 10Hz to 10kHz frequency band, measured at 100µA shunt current. This value is specified in the ELECTRICAL CHARACTERISTICS-LM4040_I_3-5.0 table under "Wideband Noise (eN)" and directly impacts high-resolution ADC reference performance and low-level analog signal integrity.
LM4040DIX3-5.0 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-70, SOT-323
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Reference Type:
- Shunt
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±1%
- Temperature Coefficient:
- 150ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 85 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040DIX3-5.0 FAQ
1.How can I place an order for LM4040DIX3-5.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040DIX3-5.0 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 LM4040DIX3-5.0 reliable?
The price and inventory of LM4040DIX3-5.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040DIX3-5.0 is usually 5 days.
3.What payment methods are accepted for LM4040DIX3-5.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040DIX3-5.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040DIX3-5.0?
LM4040DIX3-5.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040DIX3-5.0 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 LM4040DIX3-5.0?
For technical support, including LM4040DIX3-5.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040DIX3-5.0 requirements.
6.How does Aetrix verify that LM4040DIX3-5.0 is sourced from the original manufacturer or authorized distributors?
All LM4040DIX3-5.0 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 LM4040DIX3-5.0 meets industry standards.
7.What is the process for return or replacement of LM4040DIX3-5.0?
All LM4040DIX3-5.0 units undergo pre-shipment inspection (PSI). If there is an issue with LM4040DIX3-5.0, 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 LM4040DIX3-5.0 part is unused and in its original packaging.
Return procedure for LM4040DIX3-5.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM4040DIX3-5.0 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…
