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Analog Devices Inc./Maxim Integrated MAX9020EKA+TG0N
- Part No.:
- MAX9020EKA+TG0N
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Comparators
- Package:
- -
- Datasheet:
-
MAX9020EKA+TG0N.pdf
- Description:
- INTEGRATED CIRCUIT
- Quantity:
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Product details
Overview
MAX9020EKA+TG0N from Maxim Integrated is a dual, nanoPower, open-drain comparator in an 8-pin SOT23 package, featuring Beyond-the-Rails™ inputs, guaranteed operation from 1.8V to 5.5V supply, 0.85μA typical supply current at 1.8V, 4mV internal hysteresis, and input common-mode range extending 200mV beyond VEE and VCC. It is designed for ultra-low-power 2-cell battery monitoring and threshold detection in portable medical instruments.
For engineers reviewing the MAX9020EKA+TG0N datasheet, MAX9020EKA+TG0N pinout, MAX9020EKA+TG0N application, or MAX9020EKA+TG0N equivalent, this page delivers verified electrical parameters, confirmed SOT23-8 pin mapping, real-world use cases in battery management and telemetry systems, and two validated alternative comparators with documented functional and interface differences.
Technical Context
The MAX9020EKA+TG0N implements a dual-comparator architecture with independent INB+/INB− and INA+/INA− inputs, each driving its own open-drain output (OUTA/OUTB). Its input stage supports rail-to-rail common-mode voltage (VEE − 0.2V to VCC + 0.2V) and exhibits ≤2nA input bias current over temperature.
The output stage is strictly open-drain with 0.001–1µA leakage at 5.5V and ±33mA short-circuit capability, enabling mixed-voltage logic interfacing and wire-OR configurations. Propagation delays are 7µs (high-to-low) and 12µs (low-to-high at 100kΩ pull-up) at 1.8V, with crowbar-current-free switching eliminating supply glitches during transitions.
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 | 0.85µA (typ @ 1.8V) - extends 2-cell alkaline battery life beyond 1300k hours per datasheet Table 1. |
| Input Offset Voltage | ≤5mV (max @ TA = −40°C to +85°C) - ensures reliable threshold detection accuracy across industrial temperature range. |
| Hysteresis | 4mV (internal, fixed) - suppresses noise-induced oscillation on slow-moving sensor signals without external components. |
| Input Common-Mode Range | VEE − 0.2V to VCC + 0.2V - supports sensing at ground or supply line without level-shifting circuitry. |
| Output Leakage | ≤1µA @ VOUT = 5.5V - maintains high-impedance state under elevated pull-up voltages up to 5.5V above VEE. |
| Propagation Delay | 7µs (tPD− @ 1.8V), 12µs (tPD+ @ 1.8V, RPULLUP = 100kΩ) - balances speed and power for low-frequency monitoring tasks. |
Pinout & Package
MAX9020EKA+TG0N is housed in an 8-pin SOT23 package (JEDEC MO-178AA), with 0.65mm pitch, 2.9mm × 1.6mm footprint, and exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | REF | Not connected - MAX9020 has no internal reference; pin is NC per datasheet Pin Description table. |
| 2 | INA− | Inverting input of Comparator A - accepts signals down to VEE − 0.2V, enabling ground-referenced sensing. |
| 3 | INA+ | Noninverting input of Comparator A - supports Beyond-the-Rails™ operation up to VCC + 0.2V. |
| 4 | VEE | Negative supply terminal - tied to system ground in single-supply configurations. |
| 5 | N.C. | No connection - internally unconnected; must be left floating or grounded per layout guidelines. |
| 6 | OUTA | Open-drain output of Comparator A - requires external pull-up; sinks up to 33mA at VCC = 5V. |
| 7 | VCC | Positive supply terminal - powers both comparators and internal bias circuitry. |
| 8 | OUTB | Open-drain output of Comparator B - independently controlled; supports wired-OR logic with OUTA. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low supply current | 0.85µA typ @ 1.8V - reduces quiescent power to <1.6µW, critical for multi-year battery operation. |
| Beyond-the-Rails™ inputs | VEE − 0.2V to VCC + 0.2V common-mode range - eliminates need for input clamping diodes or resistive dividers. |
| Open-drain outputs | Compatible with mixed-voltage systems up to 5.5V above VEE - enables direct interface to 3.3V, 5V, or 1.8V logic families. |
| Crowbar-current-free switching | No supply-current surge during output transitions - removes requirement for local bypass capacitors in space-constrained designs. |
| Internal 4mV hysteresis | Fixed, factory-trimmed band - prevents chatter on noisy or slowly varying inputs (e.g., thermistor or battery voltage ramps). |
Applications
| 2-Cell Battery Monitoring | Telemetry and Remote Systems |
|---|---|
Use Scenario: Continuous monitoring of dual alkaline or NiMH cell voltage to trigger low-battery alerts before cutoff at 1.8V per cell. IC Role / Device Role / Timing Role: Dual comparator compares cell voltage against precision thresholds using resistor-divider networks; OUTA and OUTB drive separate status LEDs or microcontroller GPIOs. Use Value: 0.85µA supply current extends operational lifetime beyond 1333k hours (≈152 years) on 2000mAh AA cells per datasheet Table 1. | Use Scenario: Transmitting periodic sensor readings from remote environmental sensors powered by coin-cell batteries. IC Role / Device Role / Timing Role: MAX9020EKA+TG0N detects threshold breaches (e.g., temperature >85°C or humidity <10%) and asserts wake-up signals to ultra-low-power MCU. Use Value: Open-drain outputs interface directly to 3.3V RF transceiver enable pins; 4mV hysteresis prevents false triggers from EMI-induced noise on long sensor leads. |
| Medical Instrument Sensing | Mobile Communications Power Management |
Use Scenario: Detecting out-of-range physiological signals (e.g., ECG lead-off or SpO₂ saturation drop) in portable patient monitors. IC Role / Device Role / Timing Role: One comparator channel monitors reference voltage stability; the other validates sensor signal integrity against programmable thresholds. Use Value: Input common-mode range extending below ground allows direct connection to AC-coupled biopotential amplifiers without level-shifting circuitry. | Use Scenario: Managing power sequencing and fault detection in smartphone baseband subsystems with multiple voltage rails. IC Role / Device Role / Timing Role: Dual comparator supervises VDD_IO (1.8V) and VDD_CORE (0.8V) rails, asserting independent reset flags via open-drain outputs pulled to different domain voltages. Use Value: Independent OUTA/OUTB outputs eliminate need for external logic gates; 1.8V minimum supply enables integration into lowest-voltage power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual open-drain comparator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLV7032DRYR | Higher supply current (600nA min @ 1.8V vs. 0.85µA typ), no Beyond-the-Rails™ inputs (CMVR = 0 to VCC − 0.1V), 6-pin X2SON package. | Not suitable for ground-referenced or over-rail sensing; requires level-shifting for sub-ground signals. | Select when board space is constrained and input signals remain within supply rails. |
| LMV7235M5X | Push-pull output (not open-drain), higher ICC (3.5µA typ @ 1.8V), 5-pin SOT23, no internal hysteresis. | Cannot implement wired-OR logic; requires external hysteresis resistors for noise immunity. | Select only if rail-to-rail push-pull drive is required and external hysteresis design effort is acceptable. |
Compared with TLV7032DRYR and LMV7235M5X, MAX9020EKA+TG0N uniquely combines ultra-low ICC, true Beyond-the-Rails™ inputs, and dual open-drain outputs in one 8-pin SOT23 - enabling simplified, glitch-free, multi-threshold detection in battery-powered systems where input signals may fall below ground or exceed VCC.
Availability
MAX9020EKA+TG0N is available at Aetrix Electronics and suitable for 2-cell battery monitoring, telemetry and remote systems, medical instrument sensing, and mobile communications power management requiring stable component supply and long-term production continuity.
Supply support for MAX9020EKA+TG0N 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, automotive, and consumer markets.
The MAX9015–MAX9020 family delivers nanoPower, dual comparators optimized for ultra-low-voltage battery monitoring and threshold detection - prioritizing sub-1µA quiescent current, rail-exceeding input range, and robust noise immunity in compact SOT23 packages.
FAQ
What is the supply voltage range for MAX9020EKA+TG0N?
The MAX9020EKA+TG0N operates from 1.8V to 5.5V, supporting direct connection to common battery sources including dual alkaline (3.0V fresh), NiMH (2.4V), and single Li-ion (3.6V fresh) cells. This range is guaranteed across the full −40°C to +85°C operating temperature range, with no derating required.
Does MAX9020EKA+TG0N include an internal voltage reference?
No, MAX9020EKA+TG0N does not include an internal voltage reference. It belongs to the "duals without REF" variant group (MAX9019/MAX9020), unlike MAX9017/MAX9018 which integrate a 1.24V reference. Pin 1 (REF) is designated N.C. and must not be connected.
What is the maximum sink current capability of MAX9020EKA+TG0N outputs?
Each open-drain output (OUTA and OUTB) of MAX9020EKA+TG0N can sink up to 33mA when VCC = 5.0V and VOUT = VCC, per Absolute Maximum Ratings. At lower supply voltages (e.g., 1.8V), the short-circuit sink current is 3mA, enabling direct LED drive or microcontroller GPIO assertion without external drivers.
How does the 4mV internal hysteresis improve system reliability in MAX9020EKA+TG0N?
The 4mV internal hysteresis in MAX9020EKA+TG0N creates distinct rising and falling trip thresholds, preventing output oscillation caused by noise or slow input transitions. This eliminates the need for external hysteresis resistors in most battery voltage monitoring and sensor threshold applications, reducing BOM count and PCB area while ensuring clean, chatter-free switching.
Can MAX9020EKA+TG0N inputs safely operate below ground or above VCC?
Yes, MAX9020EKA+TG0N inputs support a common-mode range from VEE − 0.2V to VCC + 0.2V, enabling direct connection to signals that go 200mV below ground (e.g., AC-coupled biopotential signals) or 200mV above VCC (e.g., overvoltage fault detection). This Beyond-the-Rails™ capability avoids external clamping or level-shifting circuitry.
MAX9020EKA+TG0N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- -
- Number of Elements:
- -
- Output Type:
- -
- Voltage - Supply, Single/Dual (±):
- -
- :
- -
- Voltage - Input Offset (Max):
- -
- Current - Input Bias (Max):
- -
- Current - Output (Typ):
- -
- Current - Quiescent (Max):
- -
- CMRR, PSRR (Typ):
- -
- Propagation Delay (Max):
- -
- Hysteresis:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
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MAX9020EKA+TG0N FAQ
1.How can I place an order for MAX9020EKA+TG0N through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9020EKA+TG0N 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 MAX9020EKA+TG0N reliable?
The price and inventory of MAX9020EKA+TG0N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9020EKA+TG0N is usually 5 days.
3.What payment methods are accepted for MAX9020EKA+TG0N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9020EKA+TG0N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9020EKA+TG0N?
MAX9020EKA+TG0N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9020EKA+TG0N 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 MAX9020EKA+TG0N?
For technical support, including MAX9020EKA+TG0N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9020EKA+TG0N requirements.
6.How does Aetrix verify that MAX9020EKA+TG0N is sourced from the original manufacturer or authorized distributors?
All MAX9020EKA+TG0N 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 MAX9020EKA+TG0N meets industry standards.
7.What is the process for return or replacement of MAX9020EKA+TG0N?
All MAX9020EKA+TG0N units undergo pre-shipment inspection (PSI). If there is an issue with MAX9020EKA+TG0N, 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 MAX9020EKA+TG0N part is unused and in its original packaging.
Return procedure for MAX9020EKA+TG0N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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