MAX4740 Maxim, MAX4740 Datasheet - Page 8

• Manufacturer Part Number: MAX4740
• Description: The MAX4740/MAX4740H low on-resistance (0
• Manufacturer: Maxim

Quad SPDT Audio Switches
Figure 3. Charge injection
Figure 4. Off-Isolation, On-Loss, and Crosstalk
8
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MAX4740H
MAX4740
V
GEN
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AND OPEN AT SOCKET TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ OR NC_ TERMINALS.
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.
R
GEN
50Ω
0V OR
V
CC
NC_
OR NO_
GND
NC_
CB_
MAX4740H
MAX4740
CB_
GND
V
V
CC
CC
V
IL
1μF
TO V
V
V
COM_
COM_
CC
CC
NO_
IH
C
L
Test Circuits/Timing Diagrams (continued)
V
V
OUT
OUT
V
IN
MEAS
V
50Ω
OUT
CB_
CB_
50Ω
NETWORK
ANALYZER
OFF
OFF
50Ω
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
REF
50Ω
Q = (ΔV
ON
ON
OUT
)(C
OFF-ISOLATION = 20log
OFF-LOSS = 20log
CROSSTALK = 20log
L
)
ΔV
OUT
OFF
OFF
V
V
V
V
V
V
OUT
OUT
OUT
IN
IN
IN