ADCMP361YRJZ-REEL7(Rev0) データシートの表示（PDF） - Analog Devices

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ADCMP361YRJZ-REEL7
(Rev.:Rev0)

Single 0.275% Comparator and Reference with Dual Polarity Outputs

Analog Devices 

APPLICATION INFORMATION

The ADCMP361 is a low power comparator and reference

circuit featuring a 400 mV reference that operates from 1.7 V

to 5.5 V. The comparator is 0.275% accurate with a built-in

hysteresis of 9.3 mV. There are two outputs, one the inverse

of the other. This enables the ADCMP361 to be used as an

inverting or a noninverting comparator circuit. These open-

drain outputs are capable of sinking 40 mA.

COMPARATORS AND INTERNAL REFERENCE

The comparator has one input available externally; the other

comparator input is connected internally to the 400 mV reference.

The rising input threshold voltage of the comparators is designed

to be equal to that of the reference.

POWER SUPPLY

The ADCMP361 is designed to operate from 1.7 V to 5.5 V.

A 100 nF decoupling capacitor is recommended between VDD

and GND.

INPUTS

The comparator input is limited to the maximum VDD voltage

range. The voltage on these inputs can be above VDD but never

above the maximum allowed VDD voltage. When adding a

resistor string to the input, care must be taken when choosing

resistor values. This is due to the fact that the input bias current

will be in parallel with the bottom resistor, R2, of the input

resistor divider string. This bottom resistor must therefore be

chosen carefully in order to reduce the error introduced by this

bias current (see Figure 30).

ADCMP361

OUTPUTS

The open-drain comparator outputs are limited to the

maximum specified VDD voltage range, regardless of the

VDD voltage. These outputs are capable of sinking up 40 mA.

ADDING HYSTERESIS

To prevent oscillations at the output caused by noise or slowly

moving signals passing the switching threshold, each compara-

tor has built-in hysteresis of approximately 9.3 mV. Positive

feedback can be used to increase hysteresis.

VIN

R1

VDD

ADCMP361

IN

R2

IBIAS

400mV

OUT

OUT

GND

Figure 30. Input Bias Current Effect on Input Resistor String

Rev. 0 | Page 11 of 12

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