Datasheet

MAX4511/MAX4512/MAX4513
Quad, Rail-to-Rail, Fault-Protected,
SPST Analog Switches
______________________________________________________________________________________ 11
Bipolar Supplies
The MAX4511/MAX4512/MAX4513 operate with bipolar
supplies between ±4.5V and ±18V. The V+ and V- sup-
plies need not be symmetrical, but their difference can
not exceed the absolute maximum rating of 44V.
Single Supply
The MAX4511/MAX4512/MAX4513 operate from a sin-
gle supply between +9V and +36V when V- is connect-
ed to GND.
High-Frequency Performance
In 50Ω systems, signal response is reasonably flat up to
50MHz (see Typical Operating Characteristics). Above
20MHz, the on-response has several minor peaks that
are highly layout dependent. The problem with high-fre-
quency operation is not turning the switch on, but turn-
ing it off. The off-state switch acts like a capacitor and
passes higher frequencies with less attenuation. At
10MHz, off isolation is about -42dB in 50Ω systems,
becoming worse (approximately 20dB per decade) as
frequency increases. Higher circuit impedances also
make off isolation worse. Adjacent channel attenuation
is about 3dB above that of a bare IC socket and is due
entirely to capacitive coupling.
50%
t
ON
V+
0V
+10V
V
OUT
V
IN_
0V
90%
90%
t
OFF
V
IN_
V+
V
OUT
GND
V+
IN_
NO_ OR NC_
COM_
+10V
MAX4511
MAX4512
MAX4513
2k
50Ω
10pF
V-
V-
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
Figure 2. Switch Turn-On/Turn-Off Times
Test Circuits/Timing Diagrams
50%
V+
0V
V
NO_
, V
NC_
V
OUT
V
IN_
0V
80%
t
OPEN
V+
V
OUT
V
IN_
GND V-
V-
2k
V+
IN_
IN_
NO_
NC_
COM_
COM_
+10V
MAX4513
50Ω
10pF
V- IS CONNECTED TO GND (0V) FOR SINGLE-SUPPLY OPERATION.
t
R
< 5ns
t
F
< 5ns
Figure 3. MAX4513 Break-Before-Make Interval