NCS2220A

http://onsemi.com

6

1.0

1.0

4.0

−1.0

3.0

2.0

−3.0

Figure 13. Input Common Mode Voltage Range

versus Supply Voltage

3.0

−2.0

0

2.0

5.0

6.0

OPERATING DESCRIPTION

The NCS2220A is an industry first sub−one volt, low

power comparator. This device is designed for rail−to−rail

input and output performance. This device consumes only

7.5

mA/Comparator of supply current while achieving a

typical propagation delay of 0.5

ms at a 20 mV input

overdrive. Figures 10 and 11 show propagation delay with

various input overdrives. This comparator is guaranteed to

operate at a low voltage of 0.85 V up to 6.0 V. This is

accomplished by the use of a modified analog CMOS

process that implements depletion MOSFET devices. The

common−mode input voltage range extends 0.1 V beyond

the upper and lower rail without phase inversion or other

adverse effects. This device has a typical internal hysteresis

of

"8.0 mV. This allows for greater noise immunity and

clean output switching.

Output Stage

The NCS2220A has a complementary P and N Channel

output stage that has capability of driving a rail−to−rail

output swing with a load ranging up to 5.0 mA. It is designed

such that shoot−through current is minimized while

switching. This feature eliminates the need for bypass

capacitors under most circumstances.

Figure 14. NCS2220A Complementary Output Configuration

Output

IN (+)

IN (−)