My Inquiry
My Account
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:
Inventory:3,383
Please send an inquiry. Send us your inquiry, and we will respond immediately.
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 1.2μA supply current at 1.8V. It operates down to 1.8V supply and delivers rail-to-rail output swing up to ±6mA, making it ideal for 2-cell battery monitoring in portable medical instruments and ultra-low-power telemetry systems.
For engineers reviewing the MAX9017BEKA-T datasheet, MAX9017BEKA-T pinout, MAX9017BEKA-T application, or MAX9017BEKA-T equivalent, key selection criteria include its guaranteed 1.8V operation, internal reference accuracy and tempco, input common-mode range exceeding rails, ultra-low quiescent current across temperature, and push-pull output drive capability without external pull-up.
Technical Context
The MAX9017BEKA-T integrates two independent comparators sharing a single precision 1.24V ±1.75% reference, with each comparator featuring Beyond-the-Rails™ input stage enabling sensing at ground or supply line. Its break-before-make push-pull output stage eliminates crowbar current and suppresses supply glitches during switching.
Internal 4mV hysteresis ensures clean transitions with slow-moving signals, while input offset voltage is specified ≤5mV (max) over −40°C to +85°C and power-supply rejection ratio is 0.1–1 mV/V - critical for stable threshold detection in noisy battery-powered environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.8V to 5.5V - supports direct operation from 2-cell alkaline (1.8V end-of-life) or Li-ion (2.9V min). |
| Supply Current (typ) | 1.2μA at 1.8V - enables >1500k hours (171 years) of operation on 2000mAh AA battery. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - allows direct sensing of signals at ground or VCC without level-shifting. |
| Reference Voltage | 1.24V ±1.75% at +25°C; ±4.5% over −40°C to +85°C - suitable for precision threshold setting with minimal calibration. |
| Output Drive | ±6mA rail-to-rail push-pull - drives logic inputs directly or small LEDs without external buffers. |
| Propagation Delay | 6–11µs (VCC = 5V/1.8V) - sufficient for battery voltage monitoring and window detection at sub-kHz rates. |
| Hysteresis | 4mV internal - prevents chatter on noisy or slowly varying sensor outputs like thermistors or battery voltage ramps. |
Pinout & Package
MAX9017BEKA-T is housed in an 8-pin SOT23 package (package code T833+2, outline 21-0078), with exposed pad not electrically connected. The pinout supports dual comparator operation with shared reference and independent inputs/outputs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | 1.24V ±1.75% reference output - sourced from internal bandgap; can sink/source ≤100nA. |
| 2 | INA− | Inverting input of comparator A - accepts voltages beyond rails (VEE − 0.2V to VCC + 0.2V). |
| 3 | INA+ | Noninverting input of comparator A - same rail-exceeding range as INA−. |
| 4 | VEE | Negative supply (typically GND) - reference and comparator bias return path. |
| 5, 8 | N.C. | No internal connection - must be left floating or tied to VEE for mechanical stability. |
| 6 | OUTA | Push-pull output of comparator A - sinks and sources current; rail-to-rail swing with ≤6mA load. |
| 7 | VCC | Positive supply (1.8V–5.5V) - powers both comparators and reference. |
| Not used | INB+, INB−, OUTB | Not present - MAX9017BEKA-T is dual-channel; pins 3, 2, 6 map to comparator A only per functional diagram. |
Key Features
| Feature | Design Value |
|---|---|
| Beyond-the-Rails™ Inputs | Enables direct ground-referenced or supply-referenced sensing without external resistive dividers or level shifters. |
| Ultra-Low 1.2μA Supply Current | Extends battery life in 2-cell systems by >1500× vs. typical micropower comparators (e.g., LM393: ~100μA). |
| Integrated 1.24V Reference | Eliminates external reference IC or resistor divider, reducing BOM count and layout area in space-constrained PDAs. |
| Crowbar-Current-Free Switching | Prevents supply rail collapse during output transitions - removes need for local bulk capacitance in low-noise medical sensors. |
| 4mV Internal Hysteresis | Guarantees monotonic output response to slow thermal or battery voltage drift without external feedback components. |
Applications
| 2-Cell Battery Monitoring | Medical Instrument Threshold Detection |
|---|---|
Use Scenario: Real-time monitoring of alkaline or NiMH 2-cell packs in portable glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Dual comparator compares battery voltage against upper/lower thresholds using internal 1.24V reference to trigger low-battery alerts. Use Value: 1.2μA quiescent current extends usable battery life beyond 170 years on 2000mAh cells - enabling maintenance-free device deployment. | Use Scenario: Detecting out-of-range physiological signals (e.g., ECG lead-off, SpO₂ saturation thresholds) in battery-powered handheld diagnostics. IC Role / Device Role / Timing Role: Comparator A monitors sensor signal against fixed 1.24V reference; comparator B implements window detection with hysteresis. Use Value: Beyond-the-Rails™ inputs accept 0V–3.3V sensor outputs directly, eliminating level-shifting circuitry and associated noise coupling paths. |
| Telemetry Sensor Node | Ultra-Low-Power Remote Sensing |
Use Scenario: Environmental monitoring node (temperature/humidity) transmitting data via LoRaWAN every 10 minutes on coin cell. IC Role / Device Role / Timing Role: Comparator triggers wake-up when sensor output crosses threshold, enabling microcontroller sleep between readings. Use Value: Push-pull output drives MCU interrupt pin directly - no pull-up resistor required, reducing leakage and board area. | Use Scenario: Wireless soil moisture sensor deployed in agricultural fields for multi-year unattended operation. IC Role / Device Role / Timing Role: Uses internal reference to compare conditioned analog sensor output; hysteresis prevents false triggers from RF-induced transients. Use Value: 4mV hysteresis and <5mV VOS ensure reliable trip-point repeatability across −40°C to +85°C, critical for outdoor deployments. |
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 | Features tighter 1.236V ±1% reference (A-grade) vs. 1.24V ±1.75% (B-grade); otherwise identical pinout, specs, and performance. | Suitable where reference accuracy dominates system error budget (e.g., precision battery gauging), but adds cost and may require recalibration if replacing B-grade in existing design. | Select MAX9017AEKA-T only when reference tolerance <1% is mandatory; MAX9017BEKA-T remains optimal for cost-sensitive, high-volume portable devices. |
| TLV7032DRYR | Lower supply current (350nA), no internal reference, open-drain outputs, 1.6V min supply - lacks push-pull drive and reference integration. | Requires external reference and pull-up resistors; better suited for mixed-voltage logic interfacing than self-contained threshold detection. | Choose TLV7032DRYR only when ultra-low current (<0.5μA) outweighs need for integrated reference and push-pull output - e.g., energy-harvesting nodes. |
Compared with MAX9017AEKA-T, the MAX9017BEKA-T trades 0.75% reference tolerance for lower cost and broader availability; versus TLV7032DRYR, it provides integrated reference and stronger output drive at the expense of ~3.4× higher supply current - a justified trade for simplified BOM and robustness in battery-critical systems.
Availability
MAX9017BEKA-T is available at Aetrix Electronics and suitable for 2-cell battery monitoring, portable medical instrumentation, telemetry sensor nodes, and ultra-low-power remote sensing requiring stable component supply across industrial temperature ranges.
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 consumer systems.
The MAX9015–MAX9020 family delivers nanoPower dual comparators with integrated references for battery-critical applications where supply current, rail-exceeding inputs, and compact packaging are essential design constraints.
FAQ
What is the reference voltage tolerance and temperature coefficient of MAX9017BEKA-T?
The MAX9017BEKA-T features a B-grade internal reference rated at 1.24V ±1.75% at +25°C, with total variation of ±4.5% over −40°C to +85°C. Its temperature coefficient is 40ppm/°C, meaning reference drift is ≤0.35mV/°C across the full operating range - verified in the Typical Operating Characteristics plots (Figure MAX9015 toc20).
Can MAX9017BEKA-T operate from a single 1.8V supply?
Yes, MAX9017BEKA-T is fully specified to operate down to 1.8V supply voltage. Electrical characteristics including supply current (1.2μA typ), input common-mode range (VEE − 0.2V to VCC + 0.2V), and output swing are guaranteed at 1.8V - confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables (pages 2–4 of datasheet 19-2874).
Does MAX9017BEKA-T have push-pull or open-drain outputs?
MAX9017BEKA-T has CMOS push-pull outputs on both channels (OUTA and OUTB), capable of sourcing and sinking up to ±6mA. This is explicitly stated in the General Description and Functional Diagram sections - distinguishing it from MAX9018BEKA-T (open-drain) and enabling direct logic-level interfacing without pull-up resistors.
What is the maximum load current the internal reference can drive?
The MAX9017BEKA-T reference output (pin 1) can source and sink up to 100nA while maintaining specified accuracy. Load regulation is 0.03mV/nA, so driving >100nA degrades reference voltage stability - applications requiring higher current must buffer REF with a low-input-bias op amp such as the MAX4162, as recommended in the Applications Information section.
How does the 4mV internal hysteresis improve reliability in battery monitoring?
The 4mV internal hysteresis in MAX9017BEKA-T prevents output oscillation when input voltages hover near the trip point - a common issue with slowly decaying battery voltages or noisy sensor signals. This eliminates need for external hysteresis resistors, reduces component count, and guarantees clean, chatter-free transitions critical for accurate low-battery flag generation in medical and telemetry systems.
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:
- Obsolete
- 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.
MAX9017BEKA-T Tags
-
LM2903DR
Texas Instruments
-
LM339DR
Texas Instruments
-
LM339PWR
Texas Instruments
-
LM393DT
STMicroelectronics
-
LM2901PWR
Texas Instruments
-
LM2903DT
STMicroelectronics
-
LM393DR
Texas Instruments
-
LM239DR
Texas Instruments
-
LM339APWR
Texas Instruments
-
LM2903P
Texas Instruments
-
LM393ADR
Texas Instruments
-
NCX2200GMAZ
NXP USA Inc.
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
