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Analog Devices Inc./Maxim Integrated MAX9015AEKA-T
- Part No.:
- MAX9015AEKA-T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-8
- Datasheet:
-
MAX9015AEKA-T.pdf
- Description:
- IC COMPARATOR 1 W/VOLT REF SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,107
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Product details
Overview
The MAX9015AEKA-T from Maxim Integrated is a single, A-grade nanoPower comparator in an 8-pin SOT23 package featuring Beyond-the-Rails™ inputs, an integrated 1.236V ±1% precision reference, and push-pull output stage. It operates from 1.8V to 5.5V, draws only 1.0μA supply current at 1.8V, delivers rail-to-rail output swing with ±6mA drive capability, and includes 4mV internal hysteresis-making it ideal for 2-cell battery monitoring and ultra-low-power threshold detection in portable medical instruments.
For engineers reviewing the MAX9015AEKA-T datasheet, MAX9015AEKA-T pinout, MAX9015AEKA-T application, or MAX9015AEKA-T equivalent, key selection criteria include its guaranteed 1.8V operation, sub-5mV input offset voltage (max), 7µs propagation delay at 1.8V, Beyond-the-Rails input range extending 200mV beyond supply rails, and compatibility with ground- or supply-line sensing in space-constrained, battery-sensitive designs.
Technical Context
The MAX9015AEKA-T implements a CMOS push-pull output stage that sources and sinks up to ±6mA while maintaining rail-to-rail swing under load-enabling direct interface with logic inputs without external pull-ups. Its input stage supports common-mode voltages from VEE − 0.2V to VCC + 0.2V, enabling sensing at ground or supply lines without level-shifting.
Internal 4mV hysteresis eliminates oscillation on slow-moving or noisy signals, and its crowbar-current-free switching architecture minimizes supply-current surges during transitions-reducing power-supply noise and eliminating need for large decoupling capacitors in battery-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct operation from single Li-ion or dual alkaline/NiMH cells without regulation. |
| Supply Current (1.8V) | 1.0µA (max) - extends battery life to over 1,000k hours in 2-cell alkaline systems (2000mAh). |
| Input Offset Voltage | <5mV (max) - ensures accurate threshold detection across −40°C to +85°C temperature range. |
| Reference Voltage | 1.236V ±1% - precision internal bandgap reference eliminates need for external voltage reference IC. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - supports sensing at ground or supply rail without external resistive dividers. |
| Propagation Delay | 7µs (high-to-low, VCC = 1.8V) - sufficient speed for battery voltage monitoring and window detection in low-frequency systems. |
| Output Drive | ±6mA rail-to-rail - directly drives logic inputs, LEDs, or small MOSFET gates without buffering. |
Pinout & Package
MAX9015AEKA-T is housed in an 8-pin SOT23 package (package code T833+2, outline 21-0078), with 0.65mm pitch, 2.9mm × 1.6mm footprint, and thermal resistance θJA = 196°C/W on four-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | 1.236V ±1% precision reference output - can source/sink up to 100nA; requires no bypass capacitor in most applications. |
| 2 | IN− | Inverting input - accepts voltages from VEE − 0.2V to VCC + 0.2V; supports Beyond-the-Rails operation. |
| 3 | IN+ | Noninverting input - identical voltage range as IN−; differential input tolerance up to 6V. |
| 4 | VEE | Negative supply terminal - typically connected to GND; supports true ground-sensing applications. |
| 5, 8 | N.C. | No internal connection - must remain unconnected per datasheet; not usable for PCB routing or thermal relief. |
| 6 | OUT | CMOS push-pull output - actively drives high/low; compatible with 1.8V–5.5V logic families; no external pull-up required. |
| 7 | VCC | Positive supply terminal - supplies both comparator core and reference; PSRR of 0.1–1 mV/V minimizes supply noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ inputs | Enables direct sensing at ground or supply rail without level shifters or dividers - reduces BOM count and layout area. |
| Integrated 1.236V ±1% reference | Eliminates external reference IC and associated passives - saves >3mm² PCB area and simplifies calibration in battery monitors. |
| Crowbar-current-free switching | Minimizes supply current spikes during output transitions - reduces need for bulk decoupling and improves system-level EMI performance. |
| 4mV internal hysteresis | Prevents chatter on slow or noisy inputs - enables reliable threshold detection without external positive feedback resistors. |
| Rail-to-rail push-pull output | Drives logic inputs directly across full supply range - avoids level translators and supports mixed-voltage interconnects. |
Applications
| 2-Cell Battery Monitoring | Medical Instrument Threshold Detection |
|---|---|
Use Scenario: Monitoring voltage of dual alkaline or NiMH cells in portable pulse oximeters or glucose meters to trigger low-battery alerts before shutdown. IC Role / Device Role / Timing Role: Precision comparator comparing cell voltage against 1.236V reference to detect end-of-life threshold (e.g., 1.8V/cell). Use Value: 1.0µA quiescent current extends battery life beyond 1,000k hours; Beyond-the-Rails input allows direct GND-referenced measurement without resistor dividers. | Use Scenario: Detecting critical physiological thresholds (e.g., ECG lead-off, SpO₂ saturation drop) in battery-powered handheld diagnostics. IC Role / Device Role / Timing Role: Low-noise, hysteresis-equipped comparator converting analog sensor outputs into clean digital flags for microcontroller interrupt handling. Use Value: 4mV hysteresis prevents false triggers from sensor noise; ±1% reference ensures consistent trip points across temperature and unit variance. |
| Telemetry Sensor Node | Automotive Cabin Sensor Interface |
Use Scenario: Remote environmental monitoring (temperature/humidity) in wireless sensor nodes powered by two AA cells, transmitting data only upon threshold breach. IC Role / Device Role / Timing Role: Ultra-low-power wake-up comparator enabling MCU sleep until measured parameter exceeds preset limit. Use Value: Sub-1µA ICC at 1.8V allows multi-year operation; push-pull output directly wakes MCU GPIO without pull-up resistor leakage path. | Use Scenario: Detecting seat occupancy or door-open status via resistive or capacitive sensors in automotive body control modules. IC Role / Device Role / Timing Role: Robust comparator interfacing with 5V or 12V-sourced sensors while operating from 3.3V or 5V domain. Use Value: Input range extending 200mV beyond rails accommodates sensor offsets and transients; 1.8V min operation supports wide-input LDOs during cold-crank conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9015BEKA-T | Uses 1.24V ±1.75% reference instead of 1.236V ±1%; otherwise identical pinout, specs, and package. | Suitable where tighter reference accuracy is not required - e.g., non-calibrated battery warning thresholds. | Select MAX9015BEKA-T when ±1.75% reference tolerance meets system requirements and cost optimization is prioritized. |
| TLV3691IDBVR | 0.85µA supply current, 1.8V operation, open-drain output, no internal reference - requires external reference or resistor divider. | Better for ultra-low-current applications where external reference already exists or open-drain wire-OR is needed. | Choose TLV3691IDBVR only if open-drain output or lower ICC (<1.0µA) is mandatory and external reference infrastructure is available. |
Compared with MAX9015BEKA-T, the MAX9015AEKA-T provides higher reference accuracy (±1% vs. ±1.75%) critical for calibrated battery gauging; versus TLV3691IDBVR, it integrates a precision reference and push-pull output-reducing component count and simplifying design-but consumes slightly more current.
Availability
MAX9015AEKA-T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, portable medical instrumentation, telemetry sensor nodes, and automotive cabin sensor interfaces requiring stable component supply across extended product lifecycles.
Supply support for MAX9015AEKA-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, mixed-signal, and power management ICs for demanding industrial, medical, and automotive applications.
The MAX9015–MAX9020 family was engineered specifically for ultra-low-power, rail-aware threshold detection in battery-constrained systems-emphasizing sub-1µA operation, Beyond-the-Rails inputs, and integrated references to minimize external components.
FAQ
What is the reference voltage tolerance and temperature coefficient of the MAX9015AEKA-T?
The MAX9015AEKA-T features an internal 1.236V reference with ±1% initial accuracy at +25°C and ±2.5% total accuracy over −40°C to +85°C. Its temperature coefficient is 40ppm/°C, ensuring stable trip points across automotive and industrial temperature ranges. This reference is factory-trimmed and does not require external calibration.
Can the MAX9015AEKA-T operate from a single 1.8V supply?
Yes, the MAX9015AEKA-T is fully specified and guaranteed to operate from 1.8V to 5.5V. At 1.8V, it delivers 1.0µA typical supply current, rail-to-rail output swing, and maintains 4mV hysteresis and <5mV input offset - making it uniquely suited for direct interface with emerging low-voltage battery chemistries and energy-harvesting systems.
Does the MAX9015AEKA-T require an external bypass capacitor on the REF pin?
No, the MAX9015AEKA-T's internal reference is designed to operate without a bypass capacitor in most applications. A 1nF to 10nF ceramic capacitor from REF to GND is recommended only in electrically noisy environments or where fast transients may couple onto the reference node - per Maxim's application guidance in the datasheet.
What is the maximum load the MAX9015AEKA-T output can drive?
The MAX9015AEKA-T push-pull output can source and sink up to ±6mA while maintaining rail-to-rail swing - verified at VCC = 1.8V and 5.0V. At 1.8V, VOL ≤ 300mV and VOH ≥ VCC − 300mV with 1mA load, supporting direct interface with 1.8V logic, small signal MOSFET gates, or LED indicators without external drivers.
How does the Beyond-the-Rails™ input feature benefit ground-referenced sensing?
The MAX9015AEKA-T's input common-mode range extends to VEE − 0.2V (i.e., −0.2V when VEE = GND), enabling direct comparison of signals referenced to system ground - such as battery negative terminal voltage or shunt-based current sense - without level-shifting circuitry. This eliminates offset errors, resistor dividers, and associated power loss in ultra-low-power designs.
MAX9015AEKA-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- SOT-23-8
- Series:
- Beyond-the-Rails™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- with Voltage Reference
- Number of Elements:
- 1
- Output Type:
- CMOS, Push-Pull, Rail-to-Rail
- Voltage - Supply, Single/Dual (±):
- 1.8V ~ 5.5V
- :
- 5mV @ 5V
- Voltage - Input Offset (Max):
- 0.001µA @ 5V
- Current - Input Bias (Max):
- 50mA
- Current - Output (Typ):
- 2µA
- Current - Quiescent (Max):
- 80dB PSRR
- CMRR, PSRR (Typ):
- 28µs
- Propagation Delay (Max):
- 4mV
- Hysteresis:
- -40°C ~ 85°C
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- Surface Mount
- :
- SOT-23-8
MAX9015AEKA-T FAQ
1.How can I place an order for MAX9015AEKA-T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9015AEKA-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 MAX9015AEKA-T reliable?
The price and inventory of MAX9015AEKA-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9015AEKA-T is usually 5 days.
3.What payment methods are accepted for MAX9015AEKA-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9015AEKA-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9015AEKA-T?
MAX9015AEKA-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9015AEKA-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 MAX9015AEKA-T?
For technical support, including MAX9015AEKA-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9015AEKA-T requirements.
6.How does Aetrix verify that MAX9015AEKA-T is sourced from the original manufacturer or authorized distributors?
All MAX9015AEKA-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 MAX9015AEKA-T meets industry standards.
7.What is the process for return or replacement of MAX9015AEKA-T?
All MAX9015AEKA-T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9015AEKA-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 MAX9015AEKA-T part is unused and in its original packaging.
Return procedure for MAX9015AEKA-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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