OUT

1

2

IN+

3

4

5

0.1 F

GND

0.1 F

Ground

Bypass

Capacitor

Positive Supply

Negative Supply or Ground

Ground

Only needed

for dual power

supplies

Time (uS)

0.2

0.22 0.24 0.26 0.28

0.3

0.32 0.34 0.36 0.38

0.4

-1

-0.5

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

5mV OD

20mV OD

100mV OD

LMV331, LMV393, LMV339

SLCS136T – AUGUST 1999 – REVISED JANUARY 2015

www.ti.com

Figure 10. Response Time for Various Overdrives

(Negative Transition)

10 Power Supply Recommendations

For fast response and comparison applications with noisy or AC inputs, it is recommended to use a bypass

capacitor on the supply pin to reject any variation on the supply voltage. This variation cause temporary

fluctuations in the comparator's input common mode range and create an inaccurate comparison.

11 Layout

11.1 Layout Guidelines

For accurate comparator applications without hysteresis it is important maintain a stable power supply with

minimized noise and glitches, which can affect the high level input common mode voltage range. In order to

achieve this, it is best to add a bypass capacitor between the supply voltage and ground. This should be

implemented on the positive power supply and negative supply (if available). If a negative supply is not being

used, do not put a capacitor between the IC's GND pin and system ground.

11.2 Layout Example

Figure 11. LMV331 Layout Example

12

Submit Documentation Feedback

Copyright © 1999–2015, Texas Instruments Incorporated