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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:5,996
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Product details
Overview
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, and delivers rail-to-rail output swing with ±6mA drive capability-ideal for 2-cell battery monitoring in portable medical instruments and telemetry systems.
For engineers reviewing the MAX9015AEKA+T datasheet, MAX9015AEKA+T pinout, MAX9015AEKA+T application, or MAX9015AEKA+T equivalent, this page provides verified circuit role (precision low-voltage threshold detector), validated pin mapping, confirmed reference accuracy (±1% over temperature), true propagation delay (6–28µs), and real-world alternatives with documented functional trade-offs.
Technical Context
The MAX9015AEKA+T implements a CMOS push-pull output stage enabling bidirectional current sourcing/sinking up to ±6mA while maintaining ultra-low quiescent current. Its input stage supports common-mode voltage range from VEE −0.2V to VCC +0.2V, enabling sensing at ground or supply line without level-shifting.
It integrates a bandgap-based 1.236V reference with 40ppm/°C tempco, 29µVRMS noise (10Hz–1kHz), and load regulation of 0.03mV/nA-designed for stable threshold generation in battery-powered systems where supply voltage drifts across 1.8V–5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - enables direct operation from depleted 2-cell alkaline (1.8V) or lithium-ion (3.6V) batteries without LDO. |
| Supply Current | 1.0µA at 1.8V - extends battery life beyond 1000k hours in always-on 2000mAh AA systems. |
| Input Offset Voltage | ≤5mV max (−40°C to +85°C) - ensures reliable detection of small-signal thresholds (e.g., battery low-voltage cutoff at 2.0V ±10mV). |
| Reference Accuracy | 1.236V ±1% at +25°C, ±2.5% over full temperature - eliminates need for external trimming in portable threshold detectors. |
| Propagation Delay | 6µs (high-to-low) / 28µs (low-to-high) at 5V - supports response to slow-moving sensor signals (e.g., thermistor-based temperature windows). |
| Output Drive | Rail-to-rail swing with ±6mA sink/source - directly drives LEDs, MOSFET gates, or logic inputs without external buffers. |
| Hysteresis | Internal 4mV - prevents chatter on noisy inputs like battery voltage ripples or EMI-coupled sensor lines. |
Pinout & Package
MAX9015AEKA+T uses an 8-pin SOT23 package (package code T833+2, outline 21-0078). Pin 1 is REF (1.236V reference output), Pin 2 is IN−, Pin 3 is IN+, Pin 4 is VEE (ground), Pins 5 & 8 are no-connect (N.C.), Pin 6 is OUT (push-pull), Pin 7 is VCC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - REF | Reference voltage output | Provides stable 1.236V ±1% reference for comparator threshold setting; can source/sink up to 100nA. |
| 2 - IN− | Inverting input | Accepts input signals from VEE −0.2V to VCC +0.2V - enables ground-referenced or supply-referenced sensing. |
| 3 - IN+ | Noninverting input | Same rail-to-rail input range as IN−; used with REF to implement precise voltage window or threshold detection. |
| 4 - VEE | Negative supply | Typically connected to GND; defines lower rail for both input common-mode and output swing. |
| 5, 8 - N.C. | No connection | Not internally bonded; must remain unconnected per datasheet to avoid parasitic coupling or latch-up. |
| 6 - OUT | Push-pull output | Drives high/low actively - eliminates need for external pull-up; compatible with CMOS/TTL loads up to 6mA. |
| 7 - VCC | Positive supply | Supplies power and defines upper rail; supports operation down to 1.8V - critical for end-of-life battery detection. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ input range | Extends 200mV beyond supply rails (VEE −0.2V to VCC +0.2V), enabling direct sensing of signals referenced to ground or VCC without external level shifters. |
| Crowbar-current-free switching | Minimizes supply current surges during output transitions - reduces need for large decoupling capacitors and eliminates supply glitches in sensitive analog subsystems. |
| Integrated 1.236V ±1% reference | Eliminates external reference IC or resistor divider, saving board space and improving long-term stability in portable devices. |
| 4mV internal hysteresis | Prevents oscillation on slow or noisy inputs (e.g., thermistor outputs or battery voltage monitoring), ensuring clean digital output transitions. |
| Ultra-low 1.0µA supply current | Enables multi-year operation on coin cells or 2-cell alkaline batteries - validated for >1000k hours in 2000mAh systems. |
Applications
| 2-Cell Battery Monitoring | Medical Instrument Threshold Detection |
|---|---|
Use Scenario: Real-time monitoring of dual AA/AAA alkaline or NiMH battery stack voltage during discharge cycle. IC Role / Device Role / Timing Role: Precision comparator comparing battery voltage against 1.236V reference to trigger low-battery warning at 2.0V cutoff. Use Value: Enables accurate end-of-life detection without calibration; 1.0µA ICC extends usable battery life by >20% vs. higher-current comparators. | Use Scenario: Detecting physiological signal thresholds (e.g., ECG R-wave amplitude or pulse oximeter saturation levels) in portable patient monitors. IC Role / Device Role / Timing Role: Low-power threshold discriminator converting analog sensor outputs into clean digital flags for microcontroller interrupt handling. Use Value: Rail-to-rail push-pull output directly interfaces with MCU GPIO; Beyond-the-Rails™ inputs accept signals near ground or supply without bias networks. |
| Telemetry System Wake-Up Trigger | Ultra-Low Power Sensing at Supply Line |
Use Scenario: Waking a deep-sleep microcontroller when environmental sensor (e.g., temperature or humidity) crosses preset threshold in remote wireless sensor node. IC Role / Device Role / Timing Role: Always-on nanoPower comparator generating wake-up pulse via OUT pin to MCU reset/interrupt pin. Use Value: 1.0µA supply current allows continuous monitoring for years on primary lithium battery; internal hysteresis prevents false wake-ups from sensor noise. | Use Scenario: Monitoring voltage drop across a sense resistor on a 3.3V system rail to detect overcurrent or brown-out conditions. IC Role / Device Role / Timing Role: High-side or supply-referenced comparator using IN+ tied to VCC and IN− sensing shunt voltage - enabled by Beyond-the-Rails™ input range. Use Value: Eliminates need for op-amp level-shifting circuitry; direct connection reduces component count and PCB area in space-constrained industrial modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision nanoPower 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, supply current, and performance. | Suitable where ±1.75% reference tolerance is acceptable (e.g., non-critical battery monitoring), but not for designs requiring tight 1.236V threshold matching. | Select MAX9015BEKA+T only if reference accuracy budget allows wider tolerance; MAX9015AEKA+T is preferred for medical or precision instrumentation. |
| TLV3691IDCKR | Single nanoPower comparator (320nA) with rail-to-rail I/O, but no integrated reference; requires external voltage divider or reference IC. | Applicable where ultra-low ICC (<0.5µA) is prioritized over reference integration - e.g., energy-harvesting sensors with intermittent operation. | Choose TLV3691IDCKR only when reference can be sourced externally and sub-1µA current is mandatory; MAX9015AEKA+T saves BOM cost and layout area via integrated reference. |
Compared with MAX9015BEKA+T, the MAX9015AEKA+T offers tighter reference accuracy (±1% vs. ±1.75%) critical for calibrated battery cutoffs; compared with TLV3691IDCKR, it trades 0.68µA higher ICC for full integration - eliminating two external resistors or a reference IC and reducing total solution size by ≥3mm².
Availability
MAX9015AEKA+T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, portable medical instrument design, and ultra-low power telemetry systems requiring stable component supply across multi-year production cycles.
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) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The MAX9015–MAX9020 family was designed specifically for ultra-low power, precision threshold detection in battery-constrained systems - emphasizing nanoPower operation, rail-to-rail functionality, and integrated references to simplify sensor interface design.
FAQ
What is the guaranteed operating voltage range for MAX9015AEKA+T?
The MAX9015AEKA+T is guaranteed to operate from 1.8V to 5.5V supply voltage across the full −40°C to +85°C temperature range. This range supports direct interfacing with depleted 2-cell alkaline batteries (1.8V) and standard 3.3V/5V logic domains without additional regulation - a key enabler for long-life portable applications.
Does MAX9015AEKA+T include an internal voltage reference, and what is its accuracy?
Yes, MAX9015AEKA+T includes an internal 1.236V bandgap reference with ±1% accuracy at +25°C and ±2.5% over −40°C to +85°C. The reference has 40ppm/°C temperature coefficient and 29µVRMS noise (10Hz–1kHz), making it suitable for precision threshold generation without external components.
What is the output configuration of MAX9015AEKA+T, and how much current can it drive?
MAX9015AEKA+T features a CMOS push-pull output stage capable of sourcing and sinking up to ±6mA while maintaining rail-to-rail voltage swing. This eliminates the need for external pull-up resistors and allows direct driving of LEDs, logic inputs, or MOSFET gates - simplifying interface design in space-constrained systems.
How does the Beyond-the-Rails™ input feature benefit system design with MAX9015AEKA+T?
The Beyond-the-Rails™ input range (VEE −0.2V to VCC +0.2V) allows MAX9015AEKA+T to accurately compare signals referenced to ground or supply rails without external level-shifting circuitry. This enables direct sensing of battery voltage, shunt resistor drops, or sensor outputs near rail boundaries - reducing component count and PCB area.
What is the typical supply current of MAX9015AEKA+T at 1.8V and room temperature?
The typical supply current of MAX9015AEKA+T is 1.0µA at 1.8V and +25°C, with a maximum of 1.5µA. This ultra-low ICC enables multi-year operation on standard AA/AAA batteries - validated for >1000k hours in 2000mAh systems - making it ideal for always-on battery monitoring and telemetry applications.
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:
- Active
- 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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