HA17901A Series

Rev.1.00 Mar 10, 2006 page 9 of 15

HA17901A Application Examples

The HA17901A houses four independent comparators in a single package, and operates over a wide voltage range at

low power from a single-voltage power supply. Since the common-mode input voltage range starts at the ground

potential, the HA17901A is particularly suited for single-voltage power supply applications. This section presents

several sample HA17901A applications.

1. Square-Wave Oscillator

The circuit shown in figure 1 has the same structure as a single-voltage power supply astable multivibrator. Figure

2 shows the waveforms generated by this circuit.

100 k

C

75 pF

4.3 k

Vout

100 k

−

+

HA17901A

100 k

R

100 k

Figure 1 Square-Wave Oscillator

(2)

Horizontal: 5 V/div, Vertical: 5

µs/div, V

(1)

Horizontal: 2 V/div, Vertical: 5

µs/div, V

Figure 2 Operating Waveforms