9 Power Supply Recommendations

For fast response and comparison applications with noisy or AC inputs, TI recommends using a bypass

capacitor on the supply pin to reject any variation on the supply voltage. This variation can take away from

some of the input common mode range of the comparator and create an inaccurate comparison.

10 Layout

10.1 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).

10.2 Layout Example

1OUT

1

1IN–

2

1IN+

3

GND

4

VCC

7

2OUT

6

2IN–

5

2IN+

0.1 F

μ

Ground

Bypass

Capacitor

Negative Supply or Ground

Positive Supply

0.1 F

μ

Ground

Only needed

for dual power

supplies

14

13

12

11

8

9

10

3IN+

3IN–

4IN+

4IN–

3OUT

4OUT

Figure 10-1. LM2901x-Q1 Layout Example

LM2901-Q1, LM2901V-Q1, LM2901AV-Q1, LM2901B-Q1

SLCS142G – DECEMBER 2003 – REVISED MARCH 2023

www.ti.com

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