LM239 STMicroelectronics, LM239 Datasheet - Page 10

• Manufacturer Part Number: LM239
• Description: Low power quad voltage comparator
• Manufacturer: STMicroelectronics

Specifications of LM239

• Wide Single Supply Voltage Range Or Dual Supplies For All Devices: +2 to +36 V or ±1 V to ±18 V
• Low Input Bias Current: 25 nA typ
• Low Input Offset Current: ±5 nA typ
• Low Input Offset Voltage: ±1 mV typ
• Low Output Saturation Voltage: 250 mV typ;(ISINK = 4 mA)

Typical applications
10/19
Figure 18. Limit comparator
Figure 20. Zero crossing detector
e
I
V
V
high
low
(ref)
(ref)
e
~
I
~
2R
2R
R
S
S
S
LM139
1/4
15 V
15 V
LM139
LM139
1/ 4
1/ 4
10 kΩ
V
CC
(12 V)
2N 2222
5.1 kΩ
Lamp
e
o
Doc ID 2159 Rev 3
Figure 19. Crystal-controlled oscillator
Figure 21. Comparator with a negative
e
I
0.1 μF
~
reference
200 kΩ
200 kΩ
5 V
V
LM139
CC
f = 100 kHz
100 kΩ
1/ 4
LM139
= 15 V
1/ 4
15 V
15 V
LM139, LM239, LM339
2 kΩ
e
o
V
CC
0
5.1 kΩ
e
o