TLV9001

Inverting

Input

Output

Unity Gain

R

R

TMUX1237

1.8 V

S1

D

S2

SEL

22

TMUX1237

SCDS424A – DECEMBER 2019 – REVISED MARCH 2020

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9.2.2 Switchable Operational Amplifier Gain Setting

Another example application of the TMUX1237 is to change an Op Amp from unity gain setting to an inverting

amplifier configuration. Utilizing a switch allows a system to have a configurable gain and allows the same

architecture to be utilized across the board for various inputs to the system. shows the TMUX1237 configured for

gain setting application.

Figure 19. Switchable Op Amp Gain Setting

9.2.2.1 Design Requirements

This design example uses the parameters listed in Table 3.

Table 3. Design Parameters

PARAMETERS

VALUES

Input Signal

0 V to 2.75 V

Mux Supply (VDD)

2.75 V

Op Amp Supply (V+/ V-)

±2.75 V

Mux I/O signal range

0 V to VDD (Rail to Rail)

Control logic thresholds

1.8 V compatible (up to 5.5 V)