Datasheet

© 2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
FSA2156 Rev. 1.0.4 7
FSA2156 — Low-Voltage SPST 0.4Ω Analog Switch
Test Diagrams (Continued)
R
S
V
IN
FSA2156
GND
V
CNTRL
Network Analyzer
V
OUT
GND
V
S
GND
R
T
GND
GND
C
L
R
T
R
S
V
IN
FSA 215 6
GND
V
CNTRL
Network Analyzer
V
OUT
GND
V
S
GND
GND
R
S
and R
T
are fun ctions of the app lication en viron men t
(see AC/DC tab les for values). Off isolation = 20 Log (V
OUT
/V
IN
).
R
T
GND
GND
R
T
and C
L
are functions of the application environment (see
AC/DC tables for values). C
L
includes test fixtures and stray
capacitance
.
Figure 9. Bandwidth Figure 10. Channel Off Isolation
R
S
V
OUT
Q = DV
OUT
/ C
L
DV
OU
T
V
OUT
V
CC
0V
Input – V
CNTRL
FSA2156
Generator
GND
V
S
C
L
V
CNTRL
V
SW
B
nS
n
GND
C
L
includes test fixture and stray capacitance
GND
Off On Off
A
Figure 11. Charge Injection Test
FSA2156
B
V
CNTRL
A
Capacitance
Meter
F=1MHz
FSA2156
B
V
CNTRL
A
Capacitance
Meter
F=1MHz
Figure 12. Channel Off Capacitance Figure 13. Channel On Capacitance