MAX4530/MAX4531/MAX4532
Low-Voltage, CMOS Analog Multiplexers/Switches
with Enable Inputs and Address Latching
______________________________________________________________________________________ 13
Figure 4. Charge Injection
_________________________________Test Circuits/Timing Diagrams (continued)
V-
COM
V-
V+
GND
ADDC
ADDB
ADDA
EN1
50Ω
C
L
= 1000pF
V+
CHANNEL
SELECT
V+
V
NO
= 0V
V
OUT
MAX4530
MAX4531
MAX4532
NO_
EN2
V- = 0 FOR SINGLE-SUPPLY OPERATION.
REPEAT TEST FOR EACH SECTION.
V
EN1
∆V
OUT
V
OUT
V
EN1
V+
0
∆V
OUT
IS THE MEASURED VOLTAGE DUE TO CHARGE-TRANSFER
ERROR Q WHEN THE CHANNEL TURNS OFF.
Q = ∆V
OUT
x C
L
LE
Figure 5. Off Isolation, On Loss, and Crosstalk
V-
COM_
ADDC
ADDB
ADDA
EN2
V+
V+
CHANNEL
SELECT
V+
MAX4530
MAX4531
MAX4532
EN1
NO_
V-
GND
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS.
OFF ISOLATION IS MEASURED BETWEEN COM_ AND OFF NO_ TERMINAL ON EACH SWITCH.
ON LOSS IS MEASURED BETWEEN COM_ AND ON TERMINAL ON EACH SWITCH.
CROSSTALK (MAX4531/MAX4532 IS MEASURED FROM ONE CHANNEL (A, B, C) TO ALL OTHER CHANNELS.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
V
OUT
V
IN
MEASUREMENT REF
50Ω
50Ω 50Ω
50Ω
10nF
NETWORK
ANALYZER
OFF ISOLATION = 20log
V
OUT
V
IN
ON LOSS = 20log
V
OUT
V
IN
CROSSTALK = 20log
V
OUT
V
IN
LE
V-
COM
V-
GND
ADDC
ADDB
ADDA
EN2
V+
V+
CHANNEL
SELECT
V+
MAX4530
MAX4531
MAX4532
EN1
NO_
NO_
1MHz
CAPACITANCE
ANALYZER
LE
Figure 6. NO/COM Capacitance
