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Product Detailed Parameters
- Description：IC COMPARATOR 1 GEN PUR SC70-5
- Series：-
- Mfr：Analog Devices Inc./Maxim Integrated
- Package：Tape & Reel (TR),Cut Tape (CT)
- Type：General Purpose
- Number of Elements：1
- Output Type：CMOS, Rail-to-Rail, TTL
- Voltage - Supply, Single/Dual (±)：2.5V ~ 5.5V, ±1.25V ~ 2.75V
- Voltage - Input Offset (Max)：1mV @ 5V
- Current - Input Bias (Max)：0.003µA @ 5V
- Current - Output (Typ)：-
- Current - Quiescent (Max)：5µA
- CMRR, PSRR (Typ)：100dB CMRR, 80dB PSRR
- Propagation Delay (Max)：8µs
- Hysteresis：4mV
- Operating Temperature：-40°C ~ 125°C
- Package / Case：5-TSSOP, SC-70-5, SOT-353
- Mounting Type：Surface Mount
- Supplier Device Package：SC-70-5
- Grade：-
- Qualification：-
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Overview
The MAX9021AXK+T is a single-channel micropower analog comparator from the MAX9021/MAX9022/MAX9024 series, manufactured by Analog Devices/Maxim Integrated. It operates on a single supply voltage ranging from 2.5V to 5.5V or dual supplies of ±1.25V to ±2.75V. The device consumes 2.8µA of supply current per comparator and features a typical propagation delay of 3µs. It includes built-in 4mV hysteresis for noise immunity and supports rail-to-rail output swing. The input common-mode range extends from the negative supply to within 1.1V of the positive supply. It is housed in a 5-pin SC70 package with an operating temperature range of -40°C to +125°C.
Feature Summary
- Ultra-small footprint available in space-saving SC70 packages
- Low power consumption with 2.8µA supply current per comparator
- Internal 4mV comparator hysteresis prevents oscillations
- Rail-to-rail output swing capability
Applications
- Battery-powered portable systems
- Mobile communications
- Sensor-signal detection
- Photodiode preamps
- Digital line receivers
Procurement Notes
Verify the specific ordering suffix AXK+T corresponds to the lead-free/RoHS-compliant 5-pin SC70 package variant. Confirm the temperature grade 'A' indicates operation across the full industrial range of -40°C to +125°C. Ensure the tape-and-reel designation matches automated assembly requirements. Cross-reference the manufacturer part number with official Analog Devices documentation to validate component authenticity and revision status before procurement.
Selection Notes
Select this component when designing space-constrained portable electronics requiring low quiescent current. The single-channel configuration suits applications needing one threshold detector. Verify that the 3µs propagation delay meets system timing constraints. Ensure the input signal amplitude exceeds the offset voltage specifications for reliable switching. Consider the internal hysteresis for noisy environments without external feedback components.
Part Context
This device belongs to the MAX9021/MAX9022/MAX9024 family of micropower comparators. While the MAX9021 provides a single channel, the series also offers dual (MAX9022) and quad (MAX9024) configurations. All variants share similar electrical characteristics, including low supply current and fast response times, but differ in pin counts and package options such as SOT23, µMAX, SO, TSSOP, and SC70.
Replacement Considerations
Direct functional substitutes within the same family include the MAX9021AUK+T, which utilizes an 8-pin SOT23-5 package instead of SC70. Other compatible parts are the MAX9022 and MAX9024 series devices if additional channels are required, provided pinout compatibility or board layout adjustments are feasible.
