MAX990EUA-T

Current - Output (Typ):	--
Base Part Number:	MAX990
Supplier Device Package:	8-uMAX
Mounting Type:	Surface Mount
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Operating Temperature:	-40°C ~ 85°C
Hysteresis:	±3mV
Propagation Delay (Max):	450ns
CMRR, PSRR (Typ):	80dB CMRR, 80dB PSRR
Current - Quiescent (Max):	24µA
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, Open-Drain, Rail-to-Rail, TTL
Number of Elements:	2
Type:	General Purpose
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The MAX990EUA-T is a high-performance Linear-Comparator for industrial and consumer applications. It is an operational amplifier with digital logic output, specifically designed to detect small voltage differences between two input signals. In addition to its linear-comparator operation, the MAX990EUA-T supports a wide range of industrial and consumer applications such as low battery level monitoring, low-amplitude signals, and voltage comparator stages.

Application Fields

The MAX990EUA-T is well suited for use in a variety of applications, including low-power industrial applications, automotive performance monitoring and alarm systems, consumer electronics, and medical instrumentation. It excels at applications requiring high accuracy and precision, mainly due to its low distortion and low offset operational amplifier.The MAX990EUA-T is ideal for noise filtering, low-battery voltage monitoring and low-amplitude signal detection, and can act as a voltage comparator in sophisticated digital circuits. Additionally, the MAX990EUA-T is ideal for replacing older generation linear-comparators, and its 9-bit resolution maximizes accuracy, which allows the comparator to sense even the slightest changes in voltage.

Working Principle

The MAX990EUA-T is composed of two cascaded sections: an amplifier section and a logic-output section. The amplifier section amplifies the incoming differential voltage to an output level which is then amplified by the logic-output section. The logic-output section then accurately compares the amplified voltage to reference voltage and produces an appropriate logic output.The amplifier section consists of a differential input stage, a high-gain single-ended output stage, and an output buffer. The differential input stage controls the gain of the amplifier, while the output stage amplifies the input signal to the logic-output section. The output buffer reduces the distortion caused by the amplifier\'s high-gain operation, ensuring the original signal is accurately transferred to the logic-output section.In the logic-output section, the amplified signal is compared to the reference voltage with a wide range of accuracy. If the amplified signal is lower than the reference voltage, the output of the logic-output section is logic low; if higher, the output will be logic high. The logic output stage also ensures fast response times and stable operation.

Summary

The MAX990EUA-T is an ideal linear-comparator for industrial and consumer applications. It is ideal for detecting small voltage differences between two input signals, and its 9-bit resolution ensures high accuracy and precision. Additionally, its two-section construction amplifies the input signal, compares it to a reference voltage and produces a logic output accordingly. This makes it well suited for low-power industrial applications, automotive performance monitoring and alarm systems, consumer electronics, and medical instrumentation.

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