Datasheet


     
  
SLOS310B − DECEMBER 2000 − REVISED SEPTEMBER 2006
14
POST OFFICE BOX 655303 DALLAS, TEXAS 75265
APPLICATION INFORMATION
offset voltage (continued)
The differential nature of the TLV4120 means that both amplifiers must be considered together to calculate the
differential output offset voltage (V
DOO
) (see Figure 24). The V
OO
of amplifier A1 will be inverted by amplifier
A2. This doubles A1’s V
OO
and has A2’s V
OO
added to it, yielding:
V
DOO
+ 2V
IO1
ǒ
1 )
ǒ
R
F
R
S
Ǔ
Ǔ
" I
IB)
500k
ǒ
1 )
ǒ
R
F
R
S
Ǔ
Ǔ
" 2I
IB–
R
F
–2V
IO2
" I
IB)
500k " I
IB–
20k
+
+
A1
A2
V
DD
I
IB+
I
IB+
I
IB−
V
IO
500 k
V
IO
I
IB−
R
F
R
S
500 k
20 k
20 k
Figure 24. TLV4120 Offset Voltage Model