MUX36S08 Datasheet, PDF (23/37 Pages) Texas Instruments – Low-Capacitance, Low-Leakage-Current, Precision, Analog Multiplexers

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MUX36S08, MUX36D04
SBOS705A – JANUARY 2016 – REVISED JANUARY 2015
9.3 Feature Description
9.3.1 Ultralow Leakage Current
The MUX36xxx provide extremely low on- and off-leakage currents. The MUX36xxx are capable of switching
signals from high source-impedance inputs into a high input-impedance op amp with minimal offset error due to
the ultralow leakage currents. Figure 37 shows typical leakage currents of the MUX36xxx versus temperature.
900
600
300
0
I_D(ON)+
I_D(OFF)+
I_S(OFF)+
±300
I_S(OFF)-
±600
±900
±75 ±50 ±25
I_D(OFF)-
I_D(ON)-
0 25 50 75 100 125 150
Temperature (ƒC)
C00
Figure 37. Leakage Current vs Temperature
9.3.2 Ultralow Charge Injection
The MUX36xxx 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
The MUX36xxx have special charge-injection cancellation circuitry that reduces the source-to-drain charge
injection to as low as 0.3 pC at V_S = 0 V, and ±0.6 pC in the full signal range, as shown in Figure 39.
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