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| MUX506 Datasheet, PDF (25/38 Pages) Texas Instruments – 36-V, Low-Capacitance, Low-Leakage-Current, Precision Analog Multiplexers | |||
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www.ti.com
MUX506, MUX507
SBAS803 â NOVEMBER 2016
8.3 Feature Description
8.3.1 Ultralow Leakage Current
The MUX50x provide extremely low on- and off-leakage currents. The MUX50x are capable of switching signals
from high source-impedance inputs into a high input-impedance op amp with minimal offset error because of the
ultra-low leakage currents. Figure 37 shows typical leakage currents of the MUX50x versus temperature.
1000
500
0
ID(OFF)+
IS(OFF)+
ID(ON)+
-500
-1000
-1500
IS(OFF)-
ID(OFF)-
ID(ON)-
-2000
-75 -50 -25
0 25 50 75 100 125 150
Temperature (qC)
D006
Figure 37. Leakage Current vs Temperature
8.3.2 Ultralow Charge Injection
The MUX50x have a simple transmission gate topology, as shown in Figure 38. Any mismatch in the stray
capacitance associated with the NMOS and PMOS causes an output level change whenever the switch is
opened or closed.
OFF ON
CGSN
CGDN
S
D
CGSP
CGDP
OFF ON
Figure 38. Transmission Gate Topology
Copyright © 2016, Texas Instruments Incorporated
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