Appendix: Analog Switch Array Measurements
Xi
Any "OFF"
Switch
V
DD
=12V
+
−
Yj
I
OFF
nA
V
DD
=12V, V
EE
=V
SS
=0V
i can be equal to j
All other switches are "OFF"
I
OFF
is also measured on the V
DD
side.
V
SS
V
SS
Figure A.1 - Off-State Leakage Current (I
OFF
) Measurement*
Xi
Any "ON"
Switch
0.4V
+
−
V
Xi
−
V
Yj
= 0.4V
Yj
mA
I
ON
V
DD
=12V, V
EE
=V
SS
=0V
V
DC
=1/2 V
DD
= voltage centered at the
middle of the switch
and is w.r.t. V
EE
.
R
ON
= V
Xi
- V
Yj
I
ON
V
DC
= 0.4V
I
ON
V
DC
i can be equal to j
Figure A.2 - R
ON
/
∆R
ON
Measurement *
Xi
Any "ON"
Switch
R
S
=50Ω
Yj
V
DD
=5V, V
SS
=0V, V
EE
=-7V
-3dB = 20LOG V
OUT
R
L
=1kΩ
V
OUT
V
Xi
i can be equal to j
V
INA
=2Vpp
@1kHz
Figure A.3 - Frequency Response (F
3dB
) Measurement †
Xi
Any "ON"
Switch
R
S
=50Ω
V
INA
=2Vpp
f>1kHz
Yj
V
DD
=5V, V
SS
=0V, V
EE
=-7V
FDT = 20LOG V
OUT
R
L
=1kΩ
V
OUT
V
Xi
All other switches are "OFF"
i can be equal to j
Figure A.4 - Feedthrough (FDT) Measurement †
Notes:
* Test Conditions for MT8809 and MT8812 are respectively: V
DD
=12V, V
SS
=0V and V
DD
=14V, V
SS
=0V.
† Test Conditions for MT8809 and MT8812 are respectively: V
DD
=5V, V
DC
=0V, V
SS
=-7V and V
DD
=7V, V
DC
=0V, V
SS
=-7V.
All Xi and Yj analog I/O pins can be interchanged for all measurements.
3-72
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
