LT1720 Linear Technology, LT1720 Datasheet - Page 6

• Manufacturer Part Number: LT1720
• Description: 4ns/ 150MHz Dual Comparator with Independent Input/Output Supplies
• Manufacturer: Linear Technology

LT1720/LT1721
BANDWIDTH-LIMITED
6
TEST CIRCUITS
TRIANGLE WAVE
15V
~
V
1kHz
CM
P-P
NOTES: LT1638, LT1112, LTC203s ARE POWERED FROM 15V.
100k
50k
50
1/2 LT1638
1/2 LT1720 OR
+
–
1/4 LT1721
100k
200k PULL-DOWN PROTECTS LTC203 LOGIC INPUTS
WHEN DUT IS NOT POWERED
–3V
50
0V
DUT
+
–
100k
V
CC
0.1 F
1/2 LT1638
PULSE
100k
+
–
IN
200k
50
0.15 F
2.4k
1N5711
0.1 F
0V
–5V
130
400
14
11
Response Time Test Circuit
3
6
LTC203
LTC203
V
2N3866
TRIP
16
750
9
1
8
–100mV
25
Test Circuit
*V1 = –1000 • (OVERDRIVE + V
NOTE: RISING EDGE TEST SHOWN.
15
10
2
7
V1*
FOR FALLING EDGE, REVERSE LT1720 INPUTS
25
50k
50
1/2 LT1720 OR
10nF
10nF
1/4 LT1721
DUT
14
11
3
6
16
1
8
9
+
–
TRIP
+V
CC
–V
+
)
– V
CM
CM
15
10
2
7
0.01 F
0.01 F
1720/21 TC01
1 F
1 F
–
–
+
+
1/2 LT1112
1/2 LT1112
10 SCOPE PROBE
(C
IN
10pF)
1720/21 TC02
10k
10k
1000 V
1000 V
1000 V
1000 V
TRIP
HYST
TRIP
OS
+
–