MAX4850/MAX4850H/MAX4852/MAX4852H
Dual SPDT Analog Switches with
Over-Rail Signal Handling
______________________________________________________________________________________ 13
50%
V
CC
0V
LOGIC
INPUT
V
OUT
0.9 x V
OUT
t
BBM
LOGIC
INPUT
R
L
GND
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
NO_
IN_
NC_
V
OUT
V
CC
V
CC
C
L
V
N_
COM_
MAX4850_
MAX4852_
Figure 3. Break-Before-Make Interval
V
GEN
GND
COM_
C
L
V
OUT
V
CC
V
OUT
IN
OFF
ON
OFF
ΔV
OUT
Q = (ΔV
OUT
)(C
L
)
NC_
LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
OFF
ON
OFF
IN
V
IL
TO V
IH
V
CC
R
GEN
IN_
MAX4850_
MAX4852_
OR NO_
Figure 4. Charge Injection
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF", NO_ OR NC_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON", NO_ OR NC_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
+5V
V
OUT
V
CC
IN_
NC1
COM1
NO1*
V
IN
MAX4850_
MAX4852_
OFF-ISOLATION = 20log
V
OUT
V
IN
ON-LOSS = 20log
V
OUT
V
IN
CROSSTALK = 20log
V
OUT
V
IN
NETWORK
ANALYZER
50Ω
50Ω 50Ω
50Ω
MEAS REF
10nF
0V OR V
CC
50Ω
GND
*FOR CROSSTALK THIS PIN IS NO2.
NC2 AND COM2 ARE OPEN.
Figure 5. On-Loss, Off-Isolation, and Crosstalk
