Board description

UM0900

20/43

Doc ID 17028 Rev 1

Equation 6

Total gain of the circuit with the resistors' divider is equal to:

Equation 7

With the default values this gives:

●

●

G = 4.98

●

●

Maximum current amplifiable without distortion is 6.5 A.

V

OU T

V

SIGN

V

BIAS

+

=

V

BI AS

3.3

R1

R1

R2

+

----------------------

×

1

R3

--------

1

R1

R2

+

----------------------

1

R4

--------

++

⎝⎠

⎛⎞

R4

×

------------------------------------------------------------------------

G

×

=

V

SIGN

IR

×

R2

×

R3

R4

+

() R3 R4

×

+

[]

R1

R2

+

()

R3

R4

+

() R3 R4

×

+

×

--------------------------------------------------------------------------------------------------------------------------

G

×

=

G

TOT

V

SIGN

V

IN

----------------

V

SIGN

R

SH UNT

I

×

-------------------------------

=

=