TMUX7412F datasheet(32/48 Pages) TI2

32 / 48 page

9 Detailed Description

9.1 Overview

The TMUX741xF devices are 44-V fault protected switches in a 1:1, 4 channel configuration. The devices work

well with dual supplies (±5 V to ±22 V), a single supply (8 V to 44 V), or asymmetric supplies (such as VDD

= 15 V, VSS = –5 V). The overvoltage protection feature on the source pins works under powered and powered-

off conditions, allowing for use in harsh industrial environments. The powered-off condition includes floating

power supplies, grounded power supplies, or power supplies at any level that are below the undervoltage (UV)

threshold.

9.2 Functional Block Diagram

VDD

VSS

TMUX7411F

(SELx = Logic 1)

Fault Detection/

Switch Driver/

Logic Decoder

SEL1

SEL2

SEL3

SEL4

VDD

VSS

Fault Detection/

Switch Driver/

Logic Decoder

SEL1

SEL2

SEL3

SEL4

TMUX7412F

(SELx = Logic 1)

VDD

VSS

Fault Detection/

Switch Driver/

Logic Decoder

SEL1

SEL2

SEL3

SEL4

TMUX7413F

(SELx = Logic 1)

9.3 Feature Description

9.3.1 Flat ON-Resistance

The TMUX7411F, TMUX7412F, and TMUX7413F are designed with a special switch architecture to produce

ultra-flat on-resistance (RON) across most of the switch input operation region. The flat RON response allows the

device to be used in precision sensor applications since the RON is controlled regardless of the signals sampled.

The architecture is implemented without a charge pump so no unwanted noise is produced from the device to

affect sampling accuracy.

9.3.2 Protection Features

The TMUX7411F, TMUX7412F, and TMUX7413F offer a number of protection features to enable robust system

implementations.

9.3.2.1 Input Voltage Tolerance

The maximum voltage that can be applied to any source input pin is +60 V or −60 V, allowing the device to

handle typical voltage fault condition in industrial applications. Caution: the device has different maximum stress

ratings across different pin combinations and are defined as the following:

1. Between source pins and supply rails: 85 V

For example, if the device is powered by VDD supply of 25 V, then the maximum negative signal level on any

source pin is –60 V. If the device is powered by VDD supply of 40 V, then the maximum negative signal level

on any source pin is reduced to –45 V to maintain the 85 V maximum rating across the source pin and the

supply.

2. Between source pins and the same drain pins: 85 V

For example, if channel S1 is ON and an overvoltage voltage fault of –60 V occurs on the source pin, then

the maximum positive voltage signal level driven on the drain pin channel D1 is 25 V to maintain the 85 V

maximum rating across the source pin and the drain pin.

TMUX7411F, TMUX7412F, TMUX7413F

SCDS404B – MARCH 2021 – REVISED NOVEMBER 2022

www.ti.com

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Product Folder Links: TMUX7411F TMUX7412F TMUX7413F

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