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Analog Devices Inc./Maxim Integrated MAX9017BEKA+T
- Part No.:
- MAX9017BEKA+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- SOT-23-8
- Datasheet:
-
MAX9017BEKA+T.pdf
- Description:
- IC COMPARATOR 2 W/VOLT REF SOT23
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MAX9017BEKA+T from Maxim Integrated is a dual nanoPower comparator with integrated 1.24V ±1.75% reference, Beyond-the-Rails™ inputs (VEE − 0.2V to VCC + 0.2V), push-pull output stage, and guaranteed operation from 1.8V to 5.5V supply. It draws only 1.2μA at 1.8V/25°C, features 4mV internal hysteresis, 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 MAX9017BEKA+T datasheet, MAX9017BEKA+T pinout, MAX9017BEKA+T application, or MAX9017BEKA+T equivalent, this page delivers verified electrical parameters, SOT23-8 package layout, dual-comparator timing behavior, and precise substitution guidance for low-power threshold detection designs requiring stable reference and ultra-low quiescent current.
Technical Context
The MAX9017BEKA+T implements two independent comparators sharing a single precision bandgap reference (1.24V ±1.75% over −40°C to +85°C, 40ppm/°C TC). Its input stage supports common-mode voltages beyond supply rails by 200mV, enabling direct sensing at ground or supply lines without level-shifting circuitry.
The push-pull output stage eliminates external pull-up resistors and enables clean, glitch-free switching with <0.2µs fall time and 1.6µs rise time (CL = 15pF). Propagation delays are 6–11µs (high-to-low) and 11–28µs (low-to-high) across 1.8V–5V supplies, with crowbar-current-free design minimizing supply-current surges during transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports direct operation from single Li-ion or dual alkaline/NiMH cells without regulation. |
| Supply Current (TA = +25°C) | 1.2μA at 1.8V - enables >1.5 million hours of continuous operation on a 2000mAh AA battery pair. |
| Input Offset Voltage (max) | 5mV - ensures reliable detection of small-signal thresholds (e.g., battery voltage sag or sensor zero-crossing). |
| Reference Accuracy | 1.24V ±1.75% at +25°C, ±4.5% over −40°C to +85°C - suitable for non-critical threshold setting where absolute accuracy is secondary to ultra-low power. |
| Output Drive Capability | ±6mA rail-to-rail swing - directly drives LEDs, logic inputs, or small MOSFET gates without external buffers. |
| Propagation Delay (VCC = 5V) | 6µs (tPD−), 28µs (tPD+) - sufficient for slow-varying signals like battery voltage monitoring or temperature trip points. |
| Hysteresis | 4mV internal - suppresses noise-induced oscillation on slow-moving inputs such as thermistor or photodiode outputs. |
Pinout & Package
MAX9017BEKA+T is housed in an 8-pin SOT23 package (package code T833+2, outline 21-0078), with exposed pad not connected. The device uses a standard 8-pin SOT23 footprint (land pattern 90-0176) and supports reflow soldering up to +260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF/INA− | 1.24V reference output; internally connected to comparator A inverting input - simplifies single-supply window detector designs. |
| 2 | INA− | Comparator A inverting input - accepts signals down to VEE − 0.2V, enabling ground-referenced sensing. |
| 3 | INA+ | Comparator A noninverting input - used with REF/INA− to configure A as a fixed-threshold detector. |
| 4 | VEE | Negative supply terminal - typically GND in single-supply systems; must be ≤ VCC − 1.8V. |
| 5, 8 | N.C. | No internal connection - left unconnected; no routing or thermal relief required. |
| 6 | OUTB | Comparator B output - push-pull, rail-to-rail, capable of sourcing/sinking ±6mA. |
| 7 | VCC | Positive supply terminal - powers both comparators and reference; decoupling capacitor recommended. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ input range | Extends 200mV beyond VEE and VCC - enables direct measurement of signals referenced to ground or supply rails without external op-amps. |
| Crowbar-current-free switching | Eliminates supply-current spikes during output transitions - reduces need for large bulk capacitors and extends battery life in portable systems. |
| Integrated 1.24V reference | ±1.75% accuracy at +25°C, 40ppm/°C drift - provides stable threshold generation without external components in space-constrained designs. |
| Ultra-low 1.2μA supply current | Enables multi-year operation on coin cells or primary batteries - critical for remote telemetry and wearable medical sensors. |
| Internal 4mV hysteresis | Prevents chatter on noisy or slowly varying inputs - eliminates need for external positive feedback resistors in basic threshold applications. |
Applications
| 2-Cell Battery Monitoring | Medical Instrument Threshold Detection |
|---|---|
|
Use Scenario: Monitoring voltage decay across two alkaline or NiMH cells to trigger low-battery alerts before system shutdown. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against 1.24V reference (A channel) and hysteresis-adjusted threshold (B channel) for robust state detection. Use Value: 1.2μA quiescent current extends operational lifetime beyond 1.5 million hours on 2000mAh cells; Beyond-the-Rails™ inputs eliminate level-shifters. |
Use Scenario: Detecting ECG lead-off conditions or temperature threshold breaches in portable patient monitors. IC Role / Device Role / Timing Role: Comparator A monitors analog sensor output against reference; comparator B validates signal integrity using hysteresis-enhanced window detection. Use Value: Rail-to-rail push-pull outputs interface directly with microcontroller GPIOs; 4mV hysteresis prevents false triggers from electrode noise. |
| Telemetry System Power Management | Automotive Cabin Sensor Interface |
|
Use Scenario: Enabling wake-up logic in wireless sensor nodes when battery voltage crosses predefined thresholds during periodic sleep cycles. IC Role / Device Role / Timing Role: MAX9017BEKA+T operates continuously at 1.8V while the host MCU remains in deep sleep; output triggers wake-up interrupt. Use Value: Sub-2μA total supply current allows years of maintenance-free deployment; REF/INA− pin simplifies single-resistor threshold programming. |
Use Scenario: Monitoring cabin temperature or humidity sensor outputs in automotive infotainment modules with strict power budgets. IC Role / Device Role / Timing Role: Dual comparator performs high/low limit checking on conditioned sensor signals, with reference shared between channels. Use Value: Guaranteed −40°C to +85°C operation meets automotive Grade 3 requirements; 5.5V max supply accommodates load-dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual nanoPower comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9017AEKA+T | 1.236V ±1% reference (A-grade), tighter initial accuracy and lower tempco (±2.5% over temp vs. ±4.5% for B-grade). | Better suited for applications requiring higher reference stability, e.g., precision battery fuel gauging or calibration references. | Select MAX9017AEKA+T when reference accuracy dominates over cost; otherwise MAX9017BEKA+T offers optimal balance of performance and price. |
| TLV7032DRYR | Push-pull dual comparator with 1.8V operation, 650nA supply current, but no integrated reference; requires external voltage divider or reference IC. | Lower power but adds board area and component count; lacks Beyond-the-Rails™ input capability (CMVR = GND to VCC − 0.1V). | Choose TLV7032DRYR only if reference-free operation and sub-1μA current are mandatory; MAX9017BEKA+T integrates reference and rail extension at minimal current penalty. |
Compared with MAX9017AEKA+T, the MAX9017BEKA+T trades ±1% reference accuracy for lower cost and broader tolerance in less demanding threshold applications; versus TLV7032DRYR, it adds integrated reference and extended input range at the cost of 0.55μA higher supply current - a justified trade for simplified design and enhanced sensing flexibility.
Availability
MAX9017BEKA+T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, portable medical instrumentation, telemetry system power management, and automotive cabin sensor interface applications requiring stable component supply and long-term lifecycle support.
Supply support for MAX9017BEKA+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 and mixed-signal ICs for power, sensing, and interface applications in industrial, medical, and automotive markets.
The MAX9015–MAX9020 family was engineered specifically for ultra-low-power threshold detection in battery-operated systems, combining nanoscale process optimization with proprietary circuit techniques to achieve sub-1.5μA operation with integrated reference and rail-extension capability.
FAQ
What is the reference voltage tolerance of the MAX9017BEKA+T over temperature?
The MAX9017BEKA+T features a B-grade 1.24V reference with ±1.75% accuracy at +25°C and ±4.5% over the full −40°C to +85°C operating range. Its typical temperature coefficient is 40ppm/°C, meaning drift is approximately ±0.37mV/°C across the range. This tolerance is specified in the Electrical Characteristics table under "Reference Voltage" and validated across production lots per Maxim's datasheet Rev 7.
Can the MAX9017BEKA+T operate from a 1.8V supply while driving a 6mA load?
Yes, the MAX9017BEKA+T is fully specified to operate from 1.8V and deliver rail-to-rail output swing with ±6mA sink/source capability. At VCC = 1.8V and ISINK = 1mA, VOL is guaranteed ≤300mV; at ISINK = 6mA, typical VOL is ~200mV. These values are confirmed in the "Output Voltage Swing Low" section of the datasheet, ensuring reliable logic-level interfacing even at minimum supply voltage.
How does the REF/INA− pin function in the MAX9017BEKA+T?
In the MAX9017BEKA+T, Pin 1 serves as both the 1.24V reference output and the inverting input (INA−) of comparator A. This dual-function pin enables compact window or threshold detector configurations - for example, connecting a resistor divider from VCC to GND at INA+ sets a fixed trip point relative to the internal reference, eliminating external reference components. The internal connection is explicitly documented in the Pin Description table and functional diagram.
Is the MAX9017BEKA+T compatible with standard SOT23-8 PCB footprints?
Yes, the MAX9017BEKA+T uses the industry-standard 8-pin SOT23 package (outline 21-0078, land pattern 90-0176) with 0.65mm pitch and 1.27mm lead spacing. Its mechanical dimensions and soldering profiles (reflow up to +260°C, lead temp +300°C/10s) match JEDEC MO-178 specifications. No custom footprint or assembly adjustments are required for drop-in replacement in existing SOT23-8 layouts.
Does the MAX9017BEKA+T include internal hysteresis, and can it be adjusted?
Yes, the MAX9017BEKA+T includes a fixed 4mV internal hysteresis band to prevent oscillation on slow or noisy inputs. While this hysteresis cannot be disabled, additional hysteresis can be added externally using positive feedback resistors (R1, R2, R3) as detailed in the Applications Information section. The calculation method and example design procedure are provided in the datasheet Figures 2 and 3 for both push-pull and open-drain variants.
MAX9017BEKA+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:
- 2
- 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):
- 2.8µA
- 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
MAX9017BEKA+T FAQ
1.How can I place an order for MAX9017BEKA+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9017BEKA+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 MAX9017BEKA+T reliable?
The price and inventory of MAX9017BEKA+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9017BEKA+T is usually 5 days.
3.What payment methods are accepted for MAX9017BEKA+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9017BEKA+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9017BEKA+T?
MAX9017BEKA+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9017BEKA+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 MAX9017BEKA+T?
For technical support, including MAX9017BEKA+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9017BEKA+T requirements.
6.How does Aetrix verify that MAX9017BEKA+T is sourced from the original manufacturer or authorized distributors?
All MAX9017BEKA+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 MAX9017BEKA+T meets industry standards.
7.What is the process for return or replacement of MAX9017BEKA+T?
All MAX9017BEKA+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX9017BEKA+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 MAX9017BEKA+T part is unused and in its original packaging.
Return procedure for MAX9017BEKA+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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