MUX506 Datasheet, PDF (17/38 Pages) Texas Instruments – 36-V, Low-Capacitance, Low-Leakage-Current, Precision Analog Multiplexers

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MUX506, MUX507
SBAS803 – NOVEMBER 2016
7.2 On-Resistance
The on-resistance of the MUX50x is the ohmic resistance across the source (Sx, SxA, or SxB) and drain (D, DA,
or DB) pins of the device. The on-resistance varies with input voltage and supply voltage. The symbol R_ON is
used to denote on-resistance. The measurement setup used to measure R_ON is shown in Figure 26. Voltage (V)
and current (I_CH) are measured using this setup, and R_ON is computed as shown in Equation 1:
R_ON = V / I_CH
(1)
V
S
VS
D
ICH
Figure 26. On-Resistance Measurement Setup
7.3 Off Leakage
There are two types of leakage currents associated with a switch during the OFF state:
1. Source off-leakage current
2. Drain off-leakage current
Source leakage current is defined as the leakage current flowing into or out of the source pin when the switch is
off. This current is denoted by the symbol I_S(OFF).
Drain leakage current is defined as the leakage current flowing into or out of the drain pin when the switch is off.
This current is denoted by the symbol I_D(OFF).
The setup used to measure both off-leakage currents is shown in Figure 27
Is (OFF)
S
A
ID (OFF)
D
A
VS
VD
Figure 27. Off-Leakage Measurement Setup
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