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Product Detailed Parameters
- Description：IC COMPARATOR 1 GEN PUR SOT23-5
- 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：SC-74A, SOT-753
- Mounting Type：Surface Mount
- Supplier Device Package：SOT-23-5
- Grade：-
- Qualification：-
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Overview
The MAX9021AUK+T is a single-supply comparator from Analog Devices, housed in a 5-pin SOT-23 package. It operates within a voltage range of 2.5V to 5.5V and consumes 2.8µA per comparator. The device features a typical propagation delay of 3µs at 100mV overdrive and includes built-in 4mV hysteresis. Input offset voltage is typically ±1mV with a temperature coefficient of ±1µV/°C. Common-mode rejection ratio reaches 100dB, while power-supply rejection ratio is 80dB. Output swings rail-to-rail with short-circuit protection up to 50mA.
Feature Summary
- Ultra-small footprint available in space-saving SC70 packages
- Low-power consumption optimized for portable applications
- Internal hysteresis provides noise immunity against oscillations
- Rail-to-rail output swing eliminates phase reversal
Applications
- Battery-powered portable systems
- Mobile communications
- Sensor-signal detection
- Photodiode preamps
- Threshold detectors/discriminators
Procurement Notes
Verify the component matches the exact part number MAX9021AUK+T before integration. Confirm that the SOT-23-5 package aligns with your board layout requirements. Ensure the operating environment stays within the specified -40°C to +125°C temperature range. Check datasheet limits for absolute maximum ratings to prevent damage during installation or operation.
Selection Notes
Select this comparator when low quiescent current is critical for battery life. The internal 4mV hysteresis simplifies circuit design by reducing external component count. Verify that the 3µs propagation delay meets your signal processing speed requirements. Consider the rail-to-rail output capability if interfacing directly with digital logic without level shifting.
Part Context
This device belongs to the MAX9021/MAX9022/MAX9024 family of micropower comparators. While the MAX9021 offers a single channel, the series also includes dual (MAX9022) and quad (MAX9024) variants. All share similar electrical characteristics but differ in pin counts and package options like SOT-23, µMAX, and TSSOP.
Replacement Considerations
No public confirmed substitute part numbers are documented.
