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Analog Devices Inc./Maxim Integrated MAX40005AUK+
- Part No.:
- MAX40005AUK+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MAX40005AUK+.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,106
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Product details
Overview
MAX40005AUK+ from Analog Devices is a nanoPower, inverting-input, push-pull output comparator with factory-trimmed 0.5V internal reference voltage, operating from 1.7V to 5.5V supply and consuming only 500nA typical supply current. It features 0.1V to 5.5V input voltage range independent of supply, 8mV typical internal hysteresis, and -40°C to +125°C automotive temperature rating. It is used in battery-critical signal monitoring circuits such as low-voltage power rail supervision in portable medical devices.
For engineers reviewing the MAX40005AUK+ datasheet, MAX40005AUK+ pinout, MAX40005AUK+ application, or MAX40005AUK+ equivalent, this page delivers verified technical context, package-specific pin functions, real-world use cases, and validated alternative options for ultra-low-power comparator selection in space-constrained embedded systems.
Technical Context
The MAX40005AUK+ implements an inverting-input comparator architecture where output asserts low when input exceeds the 0.5V internal reference (VREF-INT = 485–515mV at +25°C). Its input stage maintains high impedance even with VCC/REF = 0V, enabling safe "always-on" sensing during system sleep modes.
It uses a push-pull output stage capable of sourcing 1mA (VOH ≤ VCC − 0.4V) and sinking 2mA (VOL ≤ 0.4V), eliminating external pull-up components. Internal RF filtering and 45dB PSRR (external VREF) ensure robust operation in noisy portable environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7V to 5.5V - supports direct interface with 1.8V, 2.5V, 3.3V, and 5V logic rails without level-shifting. |
| Supply Current (ICC) | 0.5µA typical at TA = −40°C to +85°C - enables multi-year battery life in always-monitoring applications. |
| Internal Reference Voltage | 485–515mV at +25°C (±3% tolerance) - factory-trimmed for precision threshold detection without external reference circuitry. |
| Input Voltage Range | 0.1V to 5.5V independent of VCC - allows input signals to exceed supply rail (e.g., 3.3V supply with 4.2V battery monitor). |
| Propagation Delay | 9µs (high-to-low), 25µs (low-to-high) at 100mV overdrive - sufficient for slow-varying DC thresholds like battery undervoltage lockout. |
| Operating Temperature | −40°C to +125°C - fully specified for under-hood automotive and industrial edge sensor nodes. |
| Hysteresis | 8mV typical - suppresses noise-induced chatter on marginal input transitions without external feedback. |
Pinout & Package
MAX40005AUK+ is supplied in a RoHS-compliant 5-pin SOT23 package (package code U5+1), footprint compatible with industry-standard SOT-23-5 layouts and reflow-solderable per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC/REF | Supply input and internal reference node - must be bypassed with 0.1µF capacitor to GND; accepts external reference up to 5.5V. |
| 2 | GND | Analog ground reference - shared return for supply, inputs, and output; requires low-impedance PCB connection. |
| 3 | N.C. | No internal connection - left unconnected on PCB; no routing or thermal pad required. |
| 4 | IN | Inverting input - voltage applied here is compared against internal 0.5V reference; high-Z (>1GΩ) even when powered down. |
| 5 | OUT | Push-pull output - actively drives high (to VCC) or low (to GND); no external pull-up needed for microcontroller GPIO interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Inverting input topology | Enables active-low alert generation (e.g., OUT = low when battery voltage drops below 0.5V threshold). |
| 0.5V factory-trimmed reference | Eliminates external voltage divider or precision reference IC, reducing BOM count and layout area by ≥3 components. |
| 500nA supply current | Reduces quiescent power to <1µW at 2V supply - critical for coin-cell-powered wearables and IoT sensors. |
| Input overvoltage tolerance | Accepts inputs up to 6V (absolute max) regardless of VCC - simplifies front-end protection for Li-ion battery monitoring (0–4.2V). |
| Push-pull output | Drives standard CMOS inputs directly without pull-up resistors - saves board space and avoids weak pull-up timing uncertainty. |
Applications
| Battery Undervoltage Detection | Low-Power Sensor Wake-Up |
|---|---|
Use Scenario: Monitoring single-cell Li-ion battery voltage to trigger shutdown before deep discharge. IC Role / Device Role / Timing Role: Inverting comparator comparing battery voltage against 0.5V internal reference; outputs low when battery falls below threshold. Use Value: Enables precise, self-contained cutoff at ~3.0V (using resistor divider), with no external reference or power overhead. | Use Scenario: Waking a microcontroller from deep sleep when ambient light crosses a preset level. IC Role / Device Role / Timing Role: Inverting comparator detecting rising photodiode current; output transition triggers MCU interrupt. Use Value: 500nA quiescent current ensures sensor node remains viable for >5 years on CR2032 battery. |
| Portable Medical Alert Threshold | Industrial Signal Level Monitoring |
Use Scenario: Detecting abnormal ECG lead-off condition via electrode impedance change. IC Role / Device Role / Timing Role: Inverting comparator comparing AC-coupled impedance signal against 0.5V reference; asserts fault flag when signal exceeds threshold. Use Value: Internal hysteresis prevents false alarms from signal noise; wide input range accommodates varying electrode contact quality. | Use Scenario: Monitoring 4–20mA loop current in field transmitters for open-wire detection. IC Role / Device Role / Timing Role: Inverting comparator comparing scaled loop voltage against 0.5V reference; output flags <4mA condition. Use Value: −40°C to +125°C rating ensures reliability in uncontrolled industrial enclosures; push-pull output interfaces directly to PLC input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV7011IDBVR | Noninverting input, open-drain output, 0.9V internal reference, 650nA ICC | Requires external pull-up; fixed noninverting polarity limits threshold logic flexibility | Select when noninverting behavior and 0.9V threshold are acceptable and board space permits pull-up resistor |
| MAX40003AUK+T | Inverting input, open-drain output, no internal reference (requires external VREF), 500nA ICC | Lacks integrated 0.5V reference; needs external reference or supply-derived VREF | Select when reference voltage must be user-adjustable or higher than 0.5V, and open-drain output is preferred for wired-OR logic |
Compared with TLV7011IDBVR and MAX40003AUK+T, MAX40005AUK+ uniquely combines inverting logic, push-pull output, and factory-trimmed 0.5V reference in one ultra-small SOT23 package-reducing component count and simplifying threshold design for battery-critical low-voltage detection.
Availability
MAX40005AUK+ is available at Aetrix Electronics and suitable for portable medical devices, battery management systems, and industrial sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for MAX40005AUK+ 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
MAX40005AUK+ belongs to the MAX40002–MAX40005 nanoPower comparator family, designed specifically for ultra-low-power, space-constrained portable electronics where battery life and PCB area are primary constraints.
FAQ
What is the internal reference voltage of MAX40005AUK+ and how tightly is it specified?
The MAX40005AUK+ features a factory-trimmed internal reference voltage of 0.5V, specified as 485mV to 515mV at +25°C (±3%), and 463mV to 537mV over the full −40°C to +125°C temperature range. This precision eliminates need for external reference components while maintaining accuracy across automotive-grade thermal conditions. The MAX40005AUK+ reference is internally connected and not user-adjustable.
Does MAX40005AUK+ support operation with supply voltages below 1.8V?
Yes, MAX40005AUK+ operates down to 1.7V supply voltage, making it compatible with emerging ultra-low-voltage microcontrollers and energy-harvesting systems. At 1.7V, the device maintains full functionality including 0.1V to 5.5V input range, 500nA supply current, and correct 0.5V threshold comparison. Performance data confirms operation across the entire 1.7V–5.5V range per the official Electrical Characteristics table.
What is the output configuration of MAX40005AUK+ and how does it differ from MAX40005ANS+T?
MAX40005AUK+ uses a push-pull output stage that actively drives both high and low states, requiring no external pull-up resistor. In contrast, MAX40005ANS+T (WLP package) shares identical electrical functionality but differs only in package - 5-pin SOT23 vs. 4-bump WLP. Both variants have inverting input, 0.5V internal reference, and same propagation delay and supply current specs.
Can MAX40005AUK+ inputs safely exceed the VCC supply voltage?
Yes, MAX40005AUK+ inputs tolerate voltages up to 6V (absolute maximum rating), independent of VCC level. This allows direct monitoring of higher-voltage sources - such as 4.2V Li-ion batteries - while powered from a lower 1.8V or 2.5V rail. The input stage lacks ESD diode clamps to VCC, enabling true rail-to-rail-plus input capability without damage or erroneous switching.
How does the 8mV internal hysteresis of MAX40005AUK+ improve system reliability?
The 8mV typical internal hysteresis in MAX40005AUK+ prevents output oscillation when input signals hover near the 0.5V switching threshold due to noise or slow slew rates. This eliminates need for external positive feedback networks, reduces component count, and guarantees glitch-free digital output transitions - especially valuable in battery voltage monitoring and sensor wake-up applications where false triggering must be avoided.
MAX40005AUK+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Strip
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- Push-Pull
- Voltage - Supply, Single/Dual (±):
- 1.7V ~ 5.5V
- :
- 10mV @ 3.3V
- Voltage - Input Offset (Max):
- 0.03µA
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- 1.1µA
- Current - Quiescent (Max):
- 46dB PSRR (Min)
- CMRR, PSRR (Typ):
- 9µs (Typ)
- Propagation Delay (Max):
- 8mV
- Hysteresis:
- -40°C ~ 125°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-5
MAX40005AUK+ FAQ
1.How can I place an order for MAX40005AUK+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40005AUK+ 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 MAX40005AUK+ reliable?
The price and inventory of MAX40005AUK+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40005AUK+ is usually 5 days.
3.What payment methods are accepted for MAX40005AUK+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40005AUK+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40005AUK+?
MAX40005AUK+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40005AUK+ 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 MAX40005AUK+?
For technical support, including MAX40005AUK+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40005AUK+ requirements.
6.How does Aetrix verify that MAX40005AUK+ is sourced from the original manufacturer or authorized distributors?
All MAX40005AUK+ 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 MAX40005AUK+ meets industry standards.
7.What is the process for return or replacement of MAX40005AUK+?
All MAX40005AUK+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX40005AUK+, 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 MAX40005AUK+ part is unused and in its original packaging.
Return procedure for MAX40005AUK+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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