MAX4626/MAX4627/MAX4628
0.5Ω, Low-Voltage, Single-Supply
SPST Analog Switches
_______________________________________________________________________________________ 7
t
r
< 5ns
t
f
< 5ns
50%
LOGIC
INPUT
R
L
50Ω
COM
GND
IN
t
OFF
0V
NO
OR NC
0.9 · V
0UT
0.9 · V
OUT
t
ON
V
OUT
SWITCH
OUTPUT
LOGIC
INPUT
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES
THAT HAVE THE OPPOSITE LOGIC SENSE.
V+
C
L
35pF
C
L
INCLUDES FIXTURE AND STRAY CAPACITANCE.
V
OUT
= V
N_ (
R
L
)
R
L
+ R
ON
V+
V
OUT
V
INL
V
INH
V
N_
MAX4626
MAX4627
MAX4628
Figure 2. Switching Time
Test Circuits/Timing Diagrams
V
GEN
GND
COM
C
L
V
OUT
V+
V
OUT
IN
OFF
ON
OFF
∆V
OUT
Q = (∆V
OUT
)(C
L
)
NC
OR NO
IN DEPENDS ON SWITCH CONFIGURATION;
INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
OFF
ON
OFF
IN
V
INL
to V
INH
V+
R
GEN
IN
MAX4626
MAX4627
MAX4628
Figure 3. 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.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
+5V
V
OUT
V+
IN
NO
COM
50Ω USE
ONLY FOR
ISOLATION
V
IN
MAX4626
MAX4627
MAX4628
OFF-ISOLATION = 20log
V
OUT
V
IN
ON-LOSS = 20log
V
OUT
V
IN
NETWORK
ANALYZER
50Ω
50Ω 50Ω
50Ω
MEAS REF
10nF
0V OR V+
GND
Figure 4. On-Loss and Off-Isolation
