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Analog Devices Inc./Maxim Integrated MAX40001AUT12+
- Part No.:
- MAX40001AUT12+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-6
- Datasheet:
-
MAX40001AUT12+.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:2,238
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Product details
Overview
The MAX40001AUT12+ from Maxim Integrated is a nanoPower open-drain comparator with integrated 1.252V precision voltage reference, designed for ultra-low-power portable electronics requiring rail-to-rail input operation (-0.2V to 5.7V), 0.9μA supply current, and <10μs propagation delay. It operates across 1.7V–5.5V supply and is specified over -40°C to +125°C for automotive-grade reliability in battery monitoring and level detection.
For engineers reviewing the MAX40001AUT12+ datasheet, MAX40001AUT12+ pinout, MAX40001AUT12+ application, or MAX40001AUT12+ equivalent, this page delivers verified technical context, package-specific pin mapping (SOT23-6), real-world use value per application, and two validated alternative comparators with documented functional and interface differences.
Technical Context
The MAX40001AUT12+ implements a micropower comparator core with factory-trimmed internal bandgap reference (±1% initial accuracy, <2.5% over -40°C to +125°C) and fixed 2.5mV internal hysteresis to suppress noise-induced oscillation. Its input stage supports common-mode voltages beyond rails (–0.2V to VDD + 0.2V), enabling direct sensing of battery or sensor signals without level shifting.
The open-drain output stage allows flexible pullup to any voltage ≤5.5V independent of VDD, supporting logic-level translation (e.g., 5V-to-3V) and wired-OR configurations. Supply current remains stable at 0.9μA typ during switching-no significant surge-minimizing power-supply glitches in sensitive analog systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Current | 0.9μA typical - enables >1-year operation on coin-cell batteries in always-on monitoring circuits |
| Reference Voltage | 1.252V ±1% at +25°C, ±2.5% over –40°C to +125°C - eliminates need for external reference in threshold detection |
| Propagation Delay | 14μs L→H (100kΩ pullup), 5.2μs H→L - supports fast response in battery undervoltage lockout and wake-up triggers |
| Input Common-Mode Range | –0.2V to VDD + 0.2V - accepts inputs below ground or above supply, critical for direct battery voltage sensing |
| Output Type | Open-drain - permits level-shifting, wired-OR fault detection, and pullup to higher voltage than VDD (≤5.5V) |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial, and medical wearable environments |
| Package | SOT23-6 (U6+1) - industry-standard footprint compatible with automated assembly and existing PCB layouts |
Pinout & Package
SOT23-6 package (U6+1), 2.9mm × 1.6mm × 1.1mm body, RoHS-compliant, with gull-wing leads and standard JEDEC land pattern (90-0175).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Ground reference | Primary return path for reference, comparator, and output stages; requires local 0.1μF bypass to minimize noise coupling |
| 2 IM | Inverting input | Accepts threshold or reference signal; supports common-mode down to –0.2V for sub-ground sensing |
| 3 REF | Internal reference output | Provides stable 1.252V; stable with ≤100pF capacitive load; bypass with 0.1μF if high-noise environment |
| 4 OUT | Open-drain output | Drives low actively; requires external pullup (e.g., 100kΩ to 3.3V); supports mixed-voltage interfacing up to 5.5V |
| 5 VDD | Supply voltage input | 1.7V–5.5V operation; bypass with 0.1μF ceramic capacitor close to pin to suppress supply transients |
| 6 IP | Noninverting input | Accepts monitored signal (e.g., battery voltage); full rail-to-rail swing capability enables direct connection |
Key Features
| Feature | Design Value |
|---|---|
| NanoPower operation | 0.9μA supply current enables multi-year battery life in wearables and IoT sensors |
| Integrated 1.252V reference | ±1% initial accuracy eliminates external reference IC and associated board space/cost |
| Open-drain output | Supports level translation (e.g., 5V logic → 3V MCU input) and wired-OR fault-bus architectures |
| 2.5mV internal hysteresis | Prevents chatter on slow-moving or noisy inputs without external components |
| Rail-to-rail input range | –0.2V to VDD + 0.2V allows direct sensing of battery terminals and sensor outputs without biasing |
Applications
| Battery Undervoltage Detection | Wearable Health Sensor Thresholding |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage to trigger shutdown before deep discharge. IC Role / Device Role / Timing Role: Comparator compares cell voltage against 1.252V reference scaled via resistor divider; open-drain output asserts low when voltage drops below threshold. Use Value: 0.9μA quiescent current extends usable battery capacity by >30% versus μA-range alternatives; SOT23-6 fits tight space constraints in earbuds and patches. |
Use Scenario: Detecting ECG signal amplitude exceedance in clinical-grade wearables. IC Role / Device Role / Timing Role: Noninverting input receives amplified ECG; inverting input tied to 1.252V reference; output flags peak excursions for MCU wake-up. Use Value: –0.2V to VDD + 0.2V input range accepts baseline-shifted bio-signals without AC coupling; 2.5mV hysteresis rejects electrode noise. |
| Automotive Cabin Temperature Monitor | Industrial Level Detector |
Use Scenario: Sensing NTC thermistor voltage in vehicle cabin HVAC control. IC Role / Device Role / Timing Role: IP monitors thermistor divider output; IM tied to 1.252V reference; open-drain output drives HVAC controller enable line. Use Value: –40°C to +125°C rating ensures operation across full automotive ambient range; 1.7V min supply supports start-stop battery sag conditions. |
Use Scenario: Liquid level detection using capacitive or resistive sensor in smart irrigation controller. IC Role / Device Role / Timing Role: Compares sensor output to 1.252V reference; output toggles pump enable; multiple MAX40001AUT12+ devices share single pullup for OR'ed alarm. Use Value: Open-drain output enables wired-OR fault aggregation without additional logic; 100nA max leakage preserves low-power sleep state integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator-with-reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV4041DBVR | Push-pull output; 1.2V reference; 1.8V–5.5V supply; 1.2μA supply current | Lacks open-drain flexibility; no sub-ground input capability (0V to VDD only) | Select when push-pull drive is preferred and level translation is unnecessary |
| MAX9063AXK+T | Open-drain output; no internal reference; requires external 1.25V reference; 1.5μA supply current | Higher BOM count and layout area due to external reference; wider input offset (±5mV) | Select when reference voltage must be user-adjustable or higher precision (>±0.5%) is required |
Compared with TLV4041DBVR and MAX9063AXK+T, the MAX40001AUT12+ uniquely combines open-drain output, sub-ground input capability, and factory-trimmed 1.252V reference in a single SOT23-6 package-reducing component count, PCB area, and design validation effort for battery-critical portable systems.
Availability
MAX40001AUT12+ is available at Aetrix Electronics and suitable for battery-powered wearables, automotive cabin sensors, and industrial level detectors requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX40001AUT12+ 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 applications in automotive, industrial, and healthcare markets.
The MAX40000/MAX40001 family targets ultra-low-power portable electronics where board space, battery life, and temperature resilience are critical-delivering integrated reference comparators in wafer-level and SOT23 packages.
FAQ
What is the reference voltage accuracy of the MAX40001AUT12+ over temperature?
The MAX40001AUT12+ features a factory-trimmed internal reference with ±1% initial accuracy at +25°C and guaranteed ±2.5% accuracy over the full –40°C to +125°C operating range. Its 15ppm/°C thermal drift ensures stable thresholding in automotive and industrial environments where ambient temperature varies widely. This performance is confirmed in the Electrical Characteristics table (page 10) of the official datasheet.
Can the MAX40001AUT12+ operate from a 1.8V supply?
Yes, the MAX40001AUT12+ operates from 1.7V to 5.5V, making it fully compatible with 1.8V systems. At 1.8V, it maintains full functionality-including 1.252V reference output, rail-to-rail input range (–0.2V to 2.0V), and open-drain output that can be pulled up to voltages higher than VDD (up to 5.5V). This is verified in the Absolute Maximum Ratings and Electrical Characteristics sections.
Does the MAX40001AUT12+ require an external pullup resistor on the OUT pin?
Yes, the MAX40001AUT12+ has an open-drain output and requires an external pullup resistor to establish a valid HIGH logic level. A 100kΩ resistor to 3.3V or 5V is recommended per the Typical Application Circuit (page 20) and Pin Description (page 16). The pullup voltage may exceed VDD (up to 5.5V), enabling level translation without additional components.
What is the maximum capacitive load the REF pin can drive?
The REF pin of the MAX40001AUT12+ is stable with capacitive loads up to 100pF, as stated in the General Description and Electrical Characteristics (page 10). For most applications, no bypass capacitor is needed; however, a 0.1μF ceramic capacitor is recommended if the REF node is exposed to high-frequency noise or long trace lengths, per the Board Layout and Bypassing section (page 19).
How does the internal 2.5mV hysteresis improve system reliability in the MAX40001AUT12+?
The MAX40001AUT12+ incorporates fixed 2.5mV internal hysteresis to prevent output oscillation when input signals hover near the trip point-common with slow-moving sensor outputs or noisy battery voltages. This eliminates the need for external hysteresis resistors, reducing component count and layout complexity while ensuring clean, chatter-free switching in level-detection applications.
MAX40001AUT12+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-6
- Series:
- -
- Packaging:
- Strip
- Product Status:
- Active
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- Open-Drain
- Voltage - Supply, Single/Dual (±):
- 1.7V ~ 5.5V
- :
- 8mV
- Voltage - Input Offset (Max):
- 0.005µA
- Current - Input Bias (Max):
- 2mA
- Current - Output (Typ):
- 1.7µA
- Current - Quiescent (Max):
- 46dB CMRR, 60dB PSRR (Min)
- CMRR, PSRR (Typ):
- 14µs (Typ)
- Propagation Delay (Max):
- 2.5mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-6
MAX40001AUT12+ FAQ
1.How can I place an order for MAX40001AUT12+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40001AUT12+ 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 MAX40001AUT12+ reliable?
The price and inventory of MAX40001AUT12+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40001AUT12+ is usually 5 days.
3.What payment methods are accepted for MAX40001AUT12+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40001AUT12+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40001AUT12+?
MAX40001AUT12+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40001AUT12+ 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 MAX40001AUT12+?
For technical support, including MAX40001AUT12+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40001AUT12+ requirements.
6.How does Aetrix verify that MAX40001AUT12+ is sourced from the original manufacturer or authorized distributors?
All MAX40001AUT12+ 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 MAX40001AUT12+ meets industry standards.
7.What is the process for return or replacement of MAX40001AUT12+?
All MAX40001AUT12+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX40001AUT12+, 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 MAX40001AUT12+ part is unused and in its original packaging.
Return procedure for MAX40001AUT12+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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