10 Application and Implementation

Note

Information in the following applications sections is not part of the TI component specification,

and TI does not warrant its accuracy or completeness. TI’s customers are responsible for

determining suitability of components for their purposes, as well as validating and testing their design

implementation to confirm system functionality.

10.1 Application Information

The TMUX821x are high voltage switches capable of supporting analog and digital signals. The high voltage

capability of these multiplexers allow them to be used in systems with high voltage signal swings, or in systems

with high common mode voltages.

Additionally, the TMUX821x devices provide consistent analog parametric performance across the entire supply

voltage range allowing the devices to be powered by the most convenient supply rails in the system while still

providing excellent performance.

10.2 Typical Application

A common feature of many PMUs (precision measurement units) is the ability to change current ranges. This

allows for a system defined current clamp when testing devices and reduces possible damage to the PMU and

DUT (device under test). In high voltage PMUs, large relays are often used to enable this switching, but this

comes with the trade-off of size. To reduce system size, a multi-channel high voltage switch can be added to

facilitate this switching with minimal impact to system size and performance. The TMUX821x allows for switching

between multiple current ranges, and has the added flexibility to use multiple channels in parallel for high current

applications.

+

–

VDD VSS

DAC

+

-

VDD

VSS

Gain / Filter

Network

10k

DUT

High Voltage

Offset

TMUX8212

+

–

VDD VSS

DAC

+

-

VDD

VSS

Gain / Filter

Network

10k

DUT

High Voltage

Offset

TMUX8212

Figure 10-1. TMUX8212 Application Schematic

TMUX8211, TMUX8212, TMUX8213

SCDS434B – OCTOBER 2021 – REVISED MARCH 2023

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