MAX991EKA-T

Current - Output (Typ):	--
Base Part Number:	MAX991
Supplier Device Package:	SOT-23-8
Mounting Type:	Surface Mount
Package / Case:	SOT-23-8
Operating Temperature:	-40°C ~ 85°C
Hysteresis:	±2.5mV
Propagation Delay (Max):	210ns
CMRR, PSRR (Typ):	80dB CMRR, 80dB PSRR
Current - Quiescent (Max):	96µA
Series:	--
Current - Input Bias (Max):	1pA @ 5.5V
Voltage - Input Offset (Max):	5mV @ 5.5V
Voltage - Supply, Single/Dual (±):	2.5 V ~ 5.5 V, ±1.25 V ~ 2.75 V
Output Type:	CMOS, Push-Pull, Rail-to-Rail, TTL
Number of Elements:	2
Type:	General Purpose
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Overview of MAX991EKA-T

The MAX991EKA-T is a low-power, dual-channel, high-speed comparator. It belongs to a family of Linear-Comparators and is designed to accept a wide variety of input signals, such as analog, digital, and frequency-encoded data. As such, the MAX991EKA-T is an essential component for precision, microprocessor-based data conversion and simultaneous sampling applications, such as digitizing small-amplitude signals, which require small offset voltage, high accuracy, fast response time, low power consumption, and high input impedance.

Application Field of MAX991EKA-T

The MAX991EKA-T is ideal for a wide range of analog-to-digital conversion, differential-to-single-ended conversions, as well as level detection and threshold-setting applications. The MAX991EKA-T is often used in devices requiring precision analog-to-digital conversions, such as data loggers, automatic test equipment (ATE), modems, instrumentation, and control devices. Additionally, the MAX991EKA-T can be used to sample signals in the digital domain. Specifically, the fast response of the MAX991EKA-T allows it to quickly detect and convert narrow pulses from alternating current waveforms. The MAX991EKA-T is also suited for synchronous data processing applications, such as car telemetry and vibration analysis in machine condition monitoring.

Working Principle of MAX991EKA-T

The MAX991EKA-T operates through a differential-input design in which two input voltages are compared to each other. Depending on the specific settings, the output voltage of the MAX991EKA-T is typically positive when the input voltage (V IN+ ) is greater than the reference voltage (V IN− ), and negative when the input voltage (V IN+ ) is less than the reference voltage (V IN− ).The maximum current drawn by the MAX991EKA-T is limited to 5mA. The response time of the MAX991EKA-T is typically 8ns (for a 22pF loading on the inputs), with there being no adjustment for slower response times. The maximum offset voltage, typically 7mV, helps maintain accuracy, if precise detection is necessary.The power consumption of the MAX991EKA-T is significantly lower than other comparators in its class, due to the low quiescent current and power-saving shutdown mode. This makes it suitable for battery-powered and other low-power applications.

Conclusion

The MAX991EKA-T is a Linear-Comparator that offers precise analog-to-digital conversion, high accuracy, and low power consumption. It is well-suited for a variety of applications requiring numerous inputs and quick response times, such as data loggers, ATE, instrumentation, and synchronous data processing applications. The differential-input design of the MAX991EKA-T makes it well-adapted for a wide range of input voltages, with its response time limited to 8 ms. Additionally, the low offset voltage and quiescent current make the MAX991EKA-T ideal for low-power applications.

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