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Analog Devices Inc./Maxim Integrated MAX40004ANS12+T
- Part No.:
- MAX40004ANS12+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX40004ANS12+T.pdf
- Description:
- MAX40004ANS12+T
- Quantity:
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Product details
Overview
The MAX40004ANS12+T from Analog Devices is a nanoPower, noninverting-input comparator with integrated 1.222V precision reference, push-pull output, and ultra-low 500nA supply current. It operates from 1.7V to 5.5V, supports input voltages from 0.1V to 5.5V (exceeding VCC), and is specified over –40°C to +125°C for automotive and portable electronics monitoring applications.
For engineers reviewing the MAX40004ANS12+T datasheet, MAX40004ANS12+T pinout, MAX40004ANS12+T application, or MAX40004ANS12+T equivalent, key selection considerations include its factory-trimmed 1.222V internal reference accuracy (±27mV over –40°C to +85°C), 9µs propagation delay at 100mV overdrive, push-pull output eliminating external pullup requirements, and operation in both 4-bump WLP (0.73mm × 0.73mm) and SOT23 packages.
Technical Context
This device implements a BiCMOS input stage enabling rail-to-rail input voltage operation up to 5.5V independent of supply, with high-impedance inputs even when powered down (VCC = 0V). Its internal temperature-compensated reference delivers stable 1.222V switching thresholds across temperature.
The push-pull output drives logic directly without external components, sourcing up to 1mA (VOH ≥ VCC – 0.4V) and sinking up to 2mA (VOL ≤ 0.4V). Internal 8mV hysteresis ensures noise immunity, and on-chip RF filtering enhances robustness in noisy portable environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.7V to 5.5V - enables direct interface with 1.8V, 2.5V, 3.3V, and 5V microcontroller rails. |
| Quiescent Supply Current | 500nA typical - extends battery life in always-on sensing applications such as lid-open detection or low-power wake-up circuits. |
| Internal Reference Voltage | 1.222V ±27mV (–40°C to +85°C) - factory-trimmed precision eliminates external reference IC and associated board space/cost. |
| Propagation Delay | 9µs typical at 100mV overdrive - supports fast response in threshold-detection systems like battery charge-state monitoring. |
| Input Voltage Range | 0.1V to 5.5V, independent of VCC - allows monitoring of signals exceeding supply voltage (e.g., 3.3V signal on 1.8V system). |
| Output Type | Push-pull - provides active high/low drive without external pullup resistor, simplifying PCB layout and reducing BOM count. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, industrial sensor nodes, and harsh-environment portable medical devices. |
Pinout & Package
MAX40004ANS12+T is available in a 4-bump wafer-level package (WLP) with 0.73mm × 0.73mm footprint and 0.35mm pitch. The WLP uses bottom-side solder bumps for mounting; no leads or gull-wing terminals are present.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | OUT | Push-pull output - actively drives high or low; compatible with CMOS/TTL logic without pullup. |
| A2 | IN | Noninverting input - output asserts high when IN > VREF_INT (1.222V); supports overvoltage input up to 5.5V. |
| B1 | VCC/REF | Supply and reference input - powers device and sets reference node; bypass with 0.1µF capacitor to GND. |
| B2 | GND | Analog ground - return path for supply and input signals; must be low-impedance for stable reference operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-small WLP footprint | 0.73mm × 0.73mm - occupies less area than two 0402 passives, enabling ultra-compact wearable and hearing-aid designs. |
| Power-down input impedance | >1GΩ with VCC = 0V - prevents signal loading during system sleep, critical for energy-harvesting and duty-cycled sensors. |
| RF-immune input architecture | On-chip filtering suppresses common-mode RF noise - eliminates need for external RC filters in EMI-prone mobile PCBs. |
| Wide supply and input range | 1.7V–5.5V supply + 0.1V–5.5V input - supports mixed-voltage systems and direct monitoring of battery or sensor outputs. |
| Factory-trimmed reference | 1.222V ±27mV (–40°C to +85°C) - achieves 2.2% initial accuracy without calibration, reducing test time and firmware overhead. |
Applications
| Battery Voltage Monitor | Portable Medical Sensor Alert |
|---|---|
Use Scenario: Detecting low-battery condition in coin-cell-powered glucose meters or pulse oximeters before shutdown. IC Role / Device Role / Timing Role: Comparator compares battery voltage against 1.222V reference to trigger alert when voltage drops below threshold. Use Value: 500nA quiescent current minimizes drain during standby; push-pull output directly drives MCU interrupt pin without pullup. |
Use Scenario: Monitoring ECG electrode contact quality by detecting impedance shift via AC-coupled signal amplitude. IC Role / Device Role / Timing Role: Noninverting comparator detects when filtered signal exceeds 1.222V, indicating good skin contact. Use Value: Input voltage range up to 5.5V allows direct connection to amplifier output; 125°C rating supports sterilization cycles. |
| Lid-Open Detection (Laptops) | Smart Toy Motion Threshold |
Use Scenario: Detecting magnetic reed switch closure in notebook clamshell lids to suspend/resume system state. IC Role / Device Role / Timing Role: Compares reed-switch voltage divider output against 1.222V reference to generate wake signal. Use Value: 9µs propagation delay ensures responsive wake-up; 0.1V minimum input enables reliable detection near ground. |
Use Scenario: Triggering sound/light feedback in educational toys when accelerometer output exceeds activity threshold. IC Role / Device Role / Timing Role: Comparator monitors analog accelerometer output; 1.222V reference sets consistent motion sensitivity level. Use Value: WLP package fits inside compact toy enclosures; 1.7V operation supports single-cell alkaline battery use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX40004AUK12+T | SOT23-5 package (5-pin) vs. WLP; identical electrical specs and 1.222V reference. | Better thermal dissipation (θJA = 255.9°C/W vs. 104.41°C/W) but larger footprint (2.9mm × 1.6mm vs. 0.73mm × 0.73mm). | Select for prototyping, manual assembly, or higher power dissipation needs where board space permits. |
| TLV3691IDCKR | Push-pull output, 1.8V–5.5V supply, but no internal reference; requires external reference or resistor divider. | Lower cost, but adds external components and calibration burden; 350nA supply current slightly lower than MAX40004ANS12+T. | Select when reference voltage is programmable or system already provides precision reference rail. |
Compared with MAX40004AUK12+T, the MAX40004ANS12+T saves >95% board area and improves thermal resistance; compared with TLV3691IDCKR, it eliminates reference design complexity and guarantees 1.222V accuracy without trimming.
Availability
MAX40004ANS12+T is available at Aetrix Electronics and suitable for battery-powered medical wearables, automotive cabin sensors, and ultra-compact IoT edge nodes requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX40004ANS12+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX4000x family targets ultra-low-power, space-constrained portable electronics, delivering nanoPower operation, sub-millimeter packaging, and integrated precision references to replace discrete comparator + reference solutions.
FAQ
What is the internal reference voltage tolerance of the MAX40004ANS12+T over temperature?
The MAX40004ANS12+T features a factory-trimmed 1.222V internal reference with ±27mV initial accuracy over –40°C to +85°C, and ±37mV over –40°C to +125°C. This corresponds to ±2.2% and ±3.0% tolerance respectively, verified per the Electrical Characteristics table on page 4 of the datasheet. The MAX40004ANS12+T maintains this specification without external calibration.
Does the MAX40004ANS12+T require an external pullup resistor on its output?
No, the MAX40004ANS12+T does not require an external pullup resistor because it features a push-pull output stage capable of actively driving both high and low states. This is confirmed in the Pin Description section (page 7) and Output Stage Structure description (page 8), which explicitly distinguish MAX40004/MAX40005 as push-pull variants. The MAX40004ANS12+T output can directly interface with CMOS or TTL inputs.
Can the input voltage of the MAX40004ANS12+T exceed its supply voltage (VCC)?
Yes, the MAX40004ANS12+T input voltage range is specified from 0.1V to 5.5V, independent of VCC, allowing inputs to exceed the supply rail - for example, a 3.3V input signal on a 1.8V-powered MAX40004ANS12+T. This is enabled by its innovative input-stage architecture without ESD diode clamps to VCC, as detailed in the Detailed Description section (page 8).
What is the propagation delay of the MAX40004ANS12+T at 20mV overdrive?
The MAX40004ANS12+T exhibits a typical propagation delay of 50µs for low-to-high transitions and 45µs for high-to-low transitions at 20mV overdrive, as specified in the Electrical Characteristics table (page 3, Note 5). These values are measured with VCC = 3.3V, CL = 20pF, and TA = TMIN to TMAX, and reflect real-world performance in low-overdrive sensing scenarios.
Is the MAX40004ANS12+T pin-compatible with other members of the MAX4000x family?
The MAX40004ANS12+T shares identical pinout (A1=OUT, A2=IN, B1=VCC/REF, B2=GND) with all MAX4000x WLP variants (e.g., MAX40002ANS12+T, MAX40003ANS12+T), enabling layout reuse across noninverting/open-drain, inverting/open-drain, and noninverting/push-pull configurations. However, functional behavior differs based on input polarity and output type - always verify schematic connectivity per the Selector Guide (page 11).
MAX40004ANS12+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
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- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
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- Grade:
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- Qualification:
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MAX40004ANS12+T FAQ
1.How can I place an order for MAX40004ANS12+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX40004ANS12+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 MAX40004ANS12+T reliable?
The price and inventory of MAX40004ANS12+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX40004ANS12+T is usually 5 days.
3.What payment methods are accepted for MAX40004ANS12+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX40004ANS12+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX40004ANS12+T?
MAX40004ANS12+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX40004ANS12+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 MAX40004ANS12+T?
For technical support, including MAX40004ANS12+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX40004ANS12+T requirements.
6.How does Aetrix verify that MAX40004ANS12+T is sourced from the original manufacturer or authorized distributors?
All MAX40004ANS12+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 MAX40004ANS12+T meets industry standards.
7.What is the process for return or replacement of MAX40004ANS12+T?
All MAX40004ANS12+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX40004ANS12+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 MAX40004ANS12+T part is unused and in its original packaging.
Return procedure for MAX40004ANS12+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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