LM339, LM239, LM2901, LM2901V, NCV2901, MC3302

http://onsemi.com

6

APPLICATIONS INFORMATION

These quad comparators feature high gain, wide

bandwidth characteristics. This gives the device oscillation

tendencies if the outputs are capacitively coupled to the

inputs via stray capacitance. This oscillation manifests itself

situation input resistors < 10 k

W should be used. The

addition of positive feedback (< 10 mV) is also

recommended. It is good design practice to ground all

unused input pins.

Differential input voltages may be larger than supply

voltages without damaging the comparator’s inputs.

Voltages more negative than −300 mV should not be used.

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Figure 9. Zero Crossing Detector

(Single Supply)

Figure 10. Zero Crossing Detector

(Split Supplies)

D1 prevents input from going negative by more than 0.6 V.

R1 + R2 = R3

R3

≤

R5

for small error in zero crossing

10 k

D1

R1

8.2 k

6.8 k

R2

15 k

R3

+15 V

*

q

10 k

Dq

q

*

)

10 M

R5

220 k

R4

220 k

+

ORDERING INFORMATION

Device

Package

LM239D

SOIC−14

55 Units/Tube

LM239DG

SOIC−14

(Pb−Free)

LM239DR2

SOIC−14

2500 / Tape & Reel

LM239DR2G

SOIC−14

(Pb−Free)

LM239DTBR2

TSSOP−14*

LM239DTBR2G

TSSOP−14*

LM239N

PDIP−14

25 Units/Rail

LM239NG

PDIP−14

(Pb−Free)

LM339D

SOIC−14

55 Units/Tube

LM339DG

SOIC−14

(Pb−Free)

LM339DR2

SOIC−14

2500 / Tape & Reel

LM339DR2G

SOIC−14

(Pb−Free)

LM339DTBR2

TSSOP−14*

LM339DTBR2G

TSSOP−14*

†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging

Specifications Brochure, BRD8011/D.

*This package is inherently Pb−Free.