TMUX7612 datasheet(32/54 Pages) TI

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8.2.3 Application Curve

TMUX7612 has excellent linearity, leakage, and charge injection performance making them an excellent choice

to minimize noise and offset errors for precision applications and very low current range measurements.

VS or VD - Source or Drain Voltage (V)

-12.5

-8.5

-4.5

-0.5

3.5

7.5

11.5

15.5

19.5

23.5

27.5

31.5

35.5 37.5

0.5

1.5

2.5

TA = -40C

TA = 25C

TA = 50C

TA = 85C

TA = 125C

VDD = 37.5 V, VSS = -12.5 V

Figure 8-2. On-Resistance vs Source or Drain

Voltage

VS or VD - Source or Drain Voltage (V)

-12.5

-7.5

-2.5

2.5

7.5

12.5

17.5

22.5

27.5

32.5

37.5

-1

-0.9

-0.8

-0.7

-0.6

-0.5

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

ION

IOFF

VDD = 37.5 V, VSS = -12.5 V

Figure 8-3. Leakage Current vs Bias Voltage

VS - Source Voltage (V)

-12.5

-6.25

6.25

12.5

18.75

31.25

37.5

-15

-10

-5

TA = -40C

TA = 25C

TA = 50C

TA = 85C

TA = 125C

VDD = 37.5 V, VSS = -12.5 V

Figure 8-4. Charge Injection vs Source Voltage

8.3 Thermal Considerations

For analog switches in many applications, several 100s of mA of current needs to be supported through the

switch (from source to drain, or NO/NC to COM). Many devices already have a maximum current specified

based on ambient temperature, but if a device specifies with junction temperature or you want to calculate for

your specific use case (temperature, supply voltage, channels in parallel) you can use the following equations

and scheme.

There are mainly 2 limitations to this maximum current:

1. Inherent metal limitations of the device

2. Thermal self-heating limitations

To calculate maximum current for your specific setup you need the following information:

TMUX7612

SCDS466A – AUGUST 2023 – REVISED DECEMBER 2024

www.ti.com

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