7.2.3 Application Curves

The following curves were generated with 5V on VCC and VLogic, RPULLUP = 5.1kΩ, and 50pF scope probe.

±1

0

1

2

3

4

5

6

-0.25

0.25

0.75

1.25

1.75

2.25

Time (usec)

5mV OD

20mV OD

100mV OD

C004

Figure 7-2. Response Time for Various Overdrives

(Positive Transition)

±1

0

1

2

3

4

5

6

±0.25 0.00

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

Time (usec)

5mV OD

20mV OD

100mV OD

C006

Figure 7-3. Response Time for Various Overdrives

(Negative Transition)

7.2.4 ESD Protection

The "B" and TiB versions add dedicated ESD protections on all the pins for improved ESD performance. Please

see Application Note SNOAA35 for more information.

7.2.5 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 can eat into the

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

7.2.6 Layout

7.2.6.1 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. 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.

7.2.6.2 Layout Example

OUT

1

IN–

2

IN+

3

4

V CC

5

0.1 F

μ

GND

0.1 F

μ

Ground

Bypass

Capacitor

Positive Supply

Negative Supply or Ground

Ground

Only needed

for dual power

supplies

Figure 7-4. TL331 Layout Example

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TL331, TL331B, TL391B

SLVS238L – AUGUST 1999 – REVISED NOVEMBER 2024

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