spt9687 Cadeka Microcircuits LLC., spt9687 Datasheet - Page 5

• Manufacturer Part Number: spt9687
• Description: Dual Ultrafast Voltage Comparator
• Manufacturer: Cadeka Microcircuits LLC.

Figure 3 - Typical Interface Circuit
Figure 5 - Equivalent Input Circuit
V CC
V Ref
V
V
V R1
V
V IN
R2
IN
EE
Figure 7 - Output Circuit
V IN
Q Output
Noninverting
100
100
R
1 pF
C
IN
R
IN
IN
Inverting
Input
Input
Q 23
V 1
C
1 pF
IN
Q
1
Q 2
LE
240
R 3
V CC
R
R 7
Q
1
+
Q 21
-
4
ECL
GND
Q 3
Q 6
= Represents line termination.
LE
R 4
V EE
.1 µF
Q 5
R 2
4.5 mA
Q 8
Q 22
240
R 5
R 8
50
Q
R L
7
-2 V
Q 24
Q 9
V 2
Q 10
50
R 6
R L
Q 11
Q 12
.1 µF
R 7
Q Output
Q Output
Q Output
V
V
PRE
PRE
5
Figure 4 - Typical Interface With Hysteresis
Figure 6 - AC Test Fixture
V
Figure 8 - Test Load
V
IN
IN
+
-
Hysteresis is obtained by applying a DC bias to the LE pin.
V
V REF
LE
-5.2 V
V IN
SEMI-
RIGID
SEMI-
RIGID
= -1.3 V ±100 mV, V
Noninverting
6
6
Represents line termination.
Inverting
Input
Input
L1
100
L1
50
6
MONITOR
6
MONITOR
R L
LE
V
IN
+
(-4.0 V)
300
50
100
V pd
50
0.1 µF
L2
100
6
LE
V LE
15 µF
LE
V CC
100
LE
+
-
+
DUT
-
50
LE
= -1.3 V.
R z
L2
LE
(+5.0 V)
GND
V+
V
4
100
V-
CC
6
Q
V LE
Q
0.1 µF
LE
LE
V EE
0.1 µF
.1 µF
50
0.1 µF
100
MONITOR
6
LE
GND
100
300
100
50
50
R L
L1
0.1 µF
Coax
50
50
L3
-2 V
(-5.2 V)
100
V
EE
15 µF
-
R Z
+
TANT
50
R L
+
15 µF
.1 µF
SEMI
RIGID
SEMI
RIGID
(-4.0 V)
-
-5.2 V
V
V O
pD
6
SPT9687
6
Q OUTPUT
Q OUTPUT
V IN
SAMPLING
3/21/97
SCOPE
50
V
V
OUT
OUT
+
-