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LM139J Scheda tecnica(PDF) 10 Page - Texas Instruments

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Il numero della parte LM139J
Spiegazioni elettronici  Quad Differential Comparators
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

LM139J Scheda tecnica(HTML) 10 Page - Texas Instruments

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1OUT
1
1IN–
2
1IN+
3
GND
4
VCC
7
2OUT
6
2IN–
5
2IN+
0.1 F
Ground
Bypass
Capacitor
Negative Supply or Ground
Positive Supply
0.1 F
Ground
Only needed
for dual power
supplies
14
13
12
11
8
9
10
3IN+
3IN–
4IN+
4IN–
3OUT
4OUT
±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
±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
10
LM139-MIL
SLCS160 – JUNE 2017
www.ti.com
Product Folder Links: LM139-MIL
Submit Documentation Feedback
Copyright © 2017, Texas Instruments Incorporated
8.2.3 Application Curves
Figure 8 and Figure 9 were generated with scope probe parasitic capacitance of 50 pF.
VCC = 5 V
VLogic = 5 V
RPULLUP = 5.1 kΩ
Figure 8. Response Time vs Output Voltage
(Positive Transition)
VCC = 5 V
VLogic = 5 V
RPULLUP = 5.1 kΩ
Figure 9. Response Time vs Output Voltage
(Negative Transition)
9 Power Supply Recommendations
For fast response and comparison applications with noisy or AC inputs, use a bypass capacitor on the supply pin
to reject any variation on the supply voltage. This variation can affect the common-mode range of the comparator
input and create an inaccurate comparison.
10 Layout
10.1 Layout Guidelines
To create an accurate comparator application without hysteresis, maintain a stable power supply with minimized
noise and glitches, which can affect the high level input common-mode voltage range. To achieve this accuracy,
add a bypass capacitor between the supply voltage and ground. Place a bypass capacitor on the positive power
supply and negative supply (if available).
NOTE
If a negative supply is not being used, do not place a capacitor between the GND pin of
the device and system ground.
10.2 Layout Example
Figure 10. LM139-MIL Layout Example


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