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Analog Devices Inc./Maxim Integrated LM4040AIX3-5.0-T
- Part No.:
- LM4040AIX3-5.0-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- SC-70, SOT-323
- Datasheet:
-
LM4040AIX3-5.0-T.pdf
- Description:
- PRECISION MICROPOWER SHUNT VREF
- Quantity:
- Payment:
- Shipping:
Inventory:9,888
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Product details
Overview
LM4040AIX3-5.0-T from Maxim Integrated is a precision 5.000V two-terminal shunt voltage reference in SC70-3 package, featuring 0.1% initial accuracy, ±100ppm/°C temperature coefficient, and stable operation from -40°C to +85°C. It delivers low dynamic impedance (0.5Ω typ), 80µVRMS wideband noise (10Hz–10kHz), and operates over 54µA–15mA shunt current range-ideal for high-accuracy ADC/DAC biasing and portable power monitoring.
For engineers reviewing the LM4040AIX3-5.0-T datasheet, LM4040AIX3-5.0-T pinout, LM4040AIX3-5.0-T application, or LM4040AIX3-5.0-T equivalent, key selection criteria include guaranteed 5.000V output tolerance (±5.0mV at +25°C), no-output-capacitor stability, ultra-small 1.8mm × 1.8mm footprint, and compatibility with capacitive loads up to 1µF.
Technical Context
The LM4040AIX3-5.0-T uses bandgap-based shunt regulation to maintain a precise 5.000V reverse breakdown voltage across its terminals when biased with 54µA–15mA cathode-to-anode current. Its laser-trimmed internal resistor network ensures 0.1% initial accuracy without external calibration.
It achieves thermal stability via curvature-compensated bandgap architecture, delivering ±100ppm/°C max temperature coefficient over -40°C to +85°C and maintaining <12.0mV total voltage change across full operating current (1mA–15mA) and temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.000V ±5.0mV at +25°C - guarantees reference accuracy within ±0.1% for precision analog signal chains. |
| Initial Accuracy | 0.1% (A-grade) - enables single-point calibration elimination in battery gauges and sensor front-ends. |
| Temp Coefficient | ±100ppm/°C max - ensures ≤±8.5mV drift over full -40°C to +85°C range, critical for industrial temperature sensing. |
| Shunt Current Range | 54µA to 15mA - supports low-power sleep modes (e.g., 60µA IoT wake-up circuits) and high-current regulation (e.g., 12-bit DAC references). |
| Dynamic Impedance | 0.5Ω typ at 1mA - minimizes load-induced voltage error (<0.75mV at 1.5mA load step), essential for stable ADC reference rails. |
| Wideband Noise | 80µVRMS (10Hz–10kHz) - limits quantization noise floor in 16-bit+ data acquisition systems. |
| Long-Term Stability | 120ppm after 1000h - ensures <0.6mV output drift over 1 year, supporting medical device calibration intervals. |
Pinout & Package
LM4040AIX3-5.0-T is housed in a RoHS-compliant 3-pin SC70 surface-mount package (1.8mm × 1.8mm × 0.9mm), 50% smaller than SOT23 equivalents. Pin 3 is unconnected (N.C.) and must be left floating or tied to pin 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+) | Cathode (reverse-bias input) | Connects to higher-voltage supply rail; sinks shunt current to regulate voltage at pin 2. |
| 2 (–) | Anode (reference output) | Provides stable 5.000V reference node; connects to load and feedback networks. |
| 3 (N.C.) | No connection | Must remain unconnected or shorted to pin 2; no internal function-omitting this causes no performance impact. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small SC70-3 footprint | 1.8mm × 1.8mm area saves >50% PCB space vs. SOT23, enabling dense portable designs like wearables and hearing aids. |
| No output capacitor required | Internally compensated for stability with any capacitive load (0–1µF), eliminating BOM cost and layout sensitivity. |
| Capacitive load tolerance | Stable with up to 1µF output capacitance-supports local decoupling for noise-sensitive ADCs without oscillation risk. |
| Wide shunt current range | 54µA minimum operating current enables micropower operation in coin-cell devices; 15mA max supports high-precision instrumentation. |
| Guaranteed -40°C to +85°C operation | Validated performance across automotive cabin and industrial control ambient ranges without derating. |
Applications
| Portable Battery Monitoring | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Real-time Li-ion cell voltage measurement in Bluetooth earbuds with 3.0V–4.2V supply range. IC Role / Device Role / Timing Role: Provides stable 5.000V reference for 12-bit SAR ADC measuring battery voltage via resistive divider. Use Value: 0.1% initial accuracy and ±100ppm/°C TC ensure <±6mV total error across temperature, enabling accurate state-of-charge estimation. | Use Scenario: 4–20mA loop-powered pressure transmitter operating at 70°C ambient. IC Role / Device Role / Timing Role: Supplies precision 5.000V reference to op-amp gain stage and ADC driver in analog front-end. Use Value: Low 80µVRMS noise prevents degradation of 16-bit resolution; SC70 size fits tight 2-layer PCB constraints. |
| Medical Pulse Oximeter Analog Front-End | Automotive Cabin Temperature Sensor Interface |
Use Scenario: Dual-wavelength photodiode signal conditioning in wearable pulse oximeters. IC Role / Device Role / Timing Role: References transimpedance amplifier and correlated double sampling circuitry for optical signal integrity. Use Value: 54µA min shunt current allows operation during ultra-low-power sleep mode; 120ppm long-term stability meets IEC 60601 calibration requirements. | Use Scenario: NTC thermistor interface in HVAC control module with -40°C to +85°C operating envelope. IC Role / Device Role / Timing Role: Supplies excitation voltage and ADC reference for ratiometric temperature measurement. Use Value: Guaranteed -40°C to +85°C performance eliminates need for external temperature compensation; SC70 package withstands reflow soldering at 260°C. |
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–18V output; 0.5% initial accuracy; 100ppm/°C TC; SOT23-3 package. | Requires external resistor network for 5.0V setting; higher minimum cathode current (80µA); less accurate at 5V point. | Select when adjustable output or higher voltage capability is needed; avoid if 0.1% fixed 5V accuracy is mandatory. |
| ADR3450ARJZ-R7 | 5.0V series reference; 0.1% accuracy; 10ppm/°C TC; 3.3V–5.5V supply; SOT23-5 package. | Series topology requires supply headroom; larger footprint; lower noise (4.8µVRMS) but higher quiescent current (120µA). | Select for ultra-low-drift applications where supply margin exists; avoid in low-headroom or space-constrained shunt designs. |
Compared with TLVH431ACDBVR and ADR3450ARJZ-R7, LM4040AIX3-5.0-T offers superior space efficiency (SC70 vs SOT23-3/SOT23-5), true two-terminal simplicity, and guaranteed 0.1% 5.000V accuracy without trimming-making it optimal for fixed-voltage, ultra-compact, low-power shunt reference roles.
Availability
LM4040AIX3-5.0-T is available at Aetrix Electronics and suitable for portable battery monitoring, industrial sensor signal conditioning, medical pulse oximeter analog front-ends, and automotive cabin temperature sensor interfaces requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for LM4040AIX3-5.0-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 demanding industrial, medical, and communications applications, emphasizing low power, small size, and high reliability.
The LM4040 product line delivers micropower shunt voltage references optimized for space-constrained, battery-operated systems requiring high initial accuracy and low temperature drift without external components.
FAQ
What is the guaranteed output voltage tolerance of LM4040AIX3-5.0-T at +25°C?
The LM4040AIX3-5.0-T guarantees a reverse breakdown voltage of 5.000V ±5.0mV (±0.1%) at +25°C, as specified in the A-grade electrical characteristics table. This tolerance is achieved via laser trimming and is validated across 100% production testing at room temperature before shipment.
Can LM4040AIX3-5.0-T operate stably with a 1µF output capacitor?
Yes, LM4040AIX3-5.0-T is internally compensated and remains stable with any capacitive load from 0 to at least 1µF, as confirmed in the Applications Information section and typical operating characteristics (Figure 14–15). No external capacitor is required for stability, simplifying design and reducing BOM count.
What is the minimum shunt current required for LM4040AIX3-5.0-T to maintain regulation?
The LM4040AIX3-5.0-T requires a minimum shunt current of 54µA to maintain regulation across its full temperature range (-40°C to +85°C), per the Electrical Characteristics table for the 5.000V variant. Below this current, output voltage may deviate beyond specified tolerance limits.
Is pin 3 of LM4040AIX3-5.0-T functional or should it be left unconnected?
Pin 3 of LM4040AIX3-5.0-T is designated N.C. (No Connection) and has no internal function. The datasheet explicitly states it must be left unconnected or tied to pin 2 (anode). Connecting it elsewhere or leaving it floating without verification risks violating the SC70-3 pin configuration and may affect thermal performance.
How does the temperature coefficient of LM4040AIX3-5.0-T impact voltage drift over its operating range?
With a maximum temperature coefficient of ±100ppm/°C, LM4040AIX3-5.0-T exhibits ≤±8.5mV total voltage drift from -40°C to +85°C (125°C ΔT × 100ppm × 5V = ±6.25mV, plus initial tolerance). This is verified in Figure 3 (LM4040-5.0V TEMPERATURE DRIFT) and ensures predictable behavior in automotive and industrial environments.
LM4040AIX3-5.0-T 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:
- ±0.1%
- Temperature Coefficient:
- 100ppm/°C
- Noise - 0.1Hz to 10Hz:
- -
- Noise - 10Hz to 10kHz:
- 80µVrms
- Voltage - Input:
- -
- Current - Supply:
- -
- Current - Cathode:
- 80 µA
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-3
LM4040AIX3-5.0-T FAQ
1.How can I place an order for LM4040AIX3-5.0-T through Aetrix?
Please submit a Request for Quotation (RFQ) for LM4040AIX3-5.0-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 LM4040AIX3-5.0-T reliable?
The price and inventory of LM4040AIX3-5.0-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM4040AIX3-5.0-T is usually 5 days.
3.What payment methods are accepted for LM4040AIX3-5.0-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM4040AIX3-5.0-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM4040AIX3-5.0-T?
LM4040AIX3-5.0-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM4040AIX3-5.0-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 LM4040AIX3-5.0-T?
For technical support, including LM4040AIX3-5.0-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM4040AIX3-5.0-T requirements.
6.How does Aetrix verify that LM4040AIX3-5.0-T is sourced from the original manufacturer or authorized distributors?
All LM4040AIX3-5.0-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 LM4040AIX3-5.0-T meets industry standards.
7.What is the process for return or replacement of LM4040AIX3-5.0-T?
All LM4040AIX3-5.0-T units undergo pre-shipment inspection (PSI). If there is an issue with LM4040AIX3-5.0-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 LM4040AIX3-5.0-T part is unused and in its original packaging.
Return procedure for LM4040AIX3-5.0-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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