TMUX7309F datasheet(17/40 Pages) TI

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7.2 On-Resistance

The on-resistance of the TMUX7308F and TMUX7309F is the ohmic resistance across the source (Sx) and drain

(Dx) pins of the device. The on-resistance varies with input voltage and supply voltage. The symbol RON is used

to denote on-resistance. Figure 7-1 shows the measurement setup used to measure RON. ΔRON represents the

difference between the RON of any two channels, while RON_FLAT denotes the flatness that is defined as the

difference between the maximum and minimum value of the on-resistance measured over the specified analog

signal range.

GND

Figure 7-1. On-Resistance Measurement Setup

7.3 Off-Leakage Current

There are two types of leakage currents associated with a switch during the off state, which follows:

1. Source off-leakage current IS(OFF): the leakage current flowing into or out of the source pin when the switch

is off.

2. Drain off-leakage current ID(OFF): the leakage current flowing into or out of the drain pin when the switch is

off.

Figure 7-2 shows the setup used to measure both off-leakage currents.

Is (OFF)

VDD

VSS

GND

ID (OFF)

IS(OFF)

ID(OFF)

VDD

VSS

Figure 7-2. Off-Leakage Measurement Setup

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TMUX7308F

SCDS403A – FEBRUARY 2021 – REVISED OCTOBER 2021

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TMUX7309F Datasheet(PDF) 17 Page - Texas Instruments