OP113/OP213/OP413

Rev. F | Page 18 of 24

Figure 51 shows the OPx13 family response to a 10 mV

overdrive signal when operating in open loop. The top trace

shows the output rising edge has a 15 μs propagation delay,

whereas the bottom trace shows a 7 μs delay on the output

falling edge. This ac response is quite acceptable in many

applications.

5V

0V

–2.5V

+2.5V

±10mV OVERDRIVE

1/2

OP113

10

90

100

0%

2V

2V

+

–

100Ω

25kΩ

5µs

Figure 51. Precision Comparator

The low noise and 250 μV (maximum) offset voltage enhance

the overall dc accuracy of this type of comparator. Note that zero-

crossing detectors and similar ground referred comparisons can be

implemented even if the input swings to −0.3 V below ground.

9V

+IN

–IN

OUT

9V

Figure 52. OP213 Simplified Schematic