Datasheet
Input voltage definition V
ID
+
ǒ
V
I)
Ǔ
–
ǒ
V
I–
Ǔ
V
IC
+
ǒ
V
I)
Ǔ
)
ǒ
V
I–
Ǔ
2
Output voltage definition V
OD
+
ǒ
V
O)
Ǔ
–
ǒ
V
O–
Ǔ
V
OC
+
ǒ
V
O)
Ǔ
)
ǒ
V
O–
Ǔ
2
Transfer function V
OD
+ V
ID
x A
ǒ
f
Ǔ
Output common mode voltage V
OC
+ V
OCM
V
OCM
_
+
_
+
V
CC+
V
IN-
V
IN+
V
O+
V
O-
Differential Structure Rejects
Coupled Noise at the Output
Differential Structure Rejects
Coupled Noise at the Input
Differential Structure Rejects
Coupled Noise at the Power Supply
V
CC-
−
R
f
R
(g)
+
+
−
V
CC−
V
CC+
R
(g)
R
f
Vs
V
IN−
V
IN+
V
O+
V
O−
V
OCM
Note: For proper operation, maintain symmetry by setting
R
f
1 = R
f
2 = R
f
and R
(g)
1 = R
(g)
2 = R
(g)
⇒ A = R
f
/R
(g)
-
R
f
R
(g)
+
+
-
V
CC-
V
CC+
R
(g)
R
f
Vs
V
IN-
V
IN+
V
O+
V
O-
V
OCM
GAIN R
(g)
Ω R
f
Ω
1
2
5
10
390
374
402
402
390
750
2010
4020
RECOMMENDED RESISTOR VALUES
THS4150
THS4151
www.ti.com
........................................................................................................................................................... SLOS321G – MAY 2000 – REVISED MARCH 2009
Figure 37. Definition of the Fully Differential Amplifier
The following schematics depict the differences between the operation of the THS415x, a fully differential
amplifier, in two different modes. Fully differential amplifiers can work with differential input or can be
implemented as single in/differential out.
Figure 38. Amplifying Differential Signals
Figure 39. Single In With Differential Out
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