Datasheet

MAX4554/MAX4555/MAX4556
Force-Sense Switches
24 ______________________________________________________________________________________
V+
V-
V+
V-
GUARD AMPLIFIER
FORCE-SENSE AMPLIFIER
VOLTAGE SOURCE
V+
V-
V+
V-
V-
GUARD AMPLIFIER
NO1
NO2
NO3
NC1
NC2
NC3
MAX4556
COM1
COM2
COM3
GND
IN1 IN2 IN3
INA
GND
MAX4556
COM1
COM2
COM3
NO1
NO2
NO3
NC1
NC2
NC3
TWINAX CABLE
LOAD 1
LOAD 2
V+
CURRENT SENSE
+FORCE
+SENSE
+DRIVEN GUARD
TWINAX CABLE
-FORCE
-SENSE
-DRIVEN GUARD
LOGIC
IN A,B LOAD
0
1
1
2
V+
V-
VL
LEAKAGE
CURRENT
LEAKAGE
CURRENT
FORCE-SENSE
AMPLIFIER
NC1
NO1
NC2
NC3
NO3
GND
NO2
IN
IN1
COM1
COM2
COM3
IN2
IN3
MAX4556
V+
V-
V+
V-
GUARD AMPLIFIER
VOLTAGE SOURCE
V+
V-
V+
V-
V-
GUARD AMPLIFIER
NO1
NO2
NO3
NC1
NC2
NC3
MAX4554
COMF
COMS
COMG
IN1 IN2 IN3
INA
EN
GND
IN1 IN2
MAX4554
COMG
COMS
COMF
NOG2
NOS2
NOF2
INB
NOG1
NOS1
NOF1
TWINAX CABLE
LOAD 1
LOAD 2
V+
CURRENT SENSE
CURRENT SENSE
+FORCE
+SENSE
+DRIVEN GUARD
TWINAX CABLE
-FORCE
-SENSE
-DRIVEN GUARD
V+ V- VL
V+ V- VL
V+ V- VL
V+ V-
VL
LEAKAGE
CURRENT
LEAKAGE
CURRENT
FORCE-SENSE
AMPLIFIER
NOG1
NOG2
NOF1
NOS1
NOS2
EN
NOF2
IN
IN1
COMG
COMF
COMS
IN2
MAX4554
EN
GND
IN1 IN2
INB
V+ V- VL
LOGIC
IN A,B LOAD
0
1
2
1
LOGIC
IN A,B LOAD
0
1
2
1
GND
CURRENT SENSE
CMOS INVERTER
V
V
V
V
Figure 9. Switching 8-Wire Guarded Force-Sense Measurements from One Precision Source-Monitor to Two Loads