Datasheet

EVAL-AD5162SDZ User Guide UG-348
Rev. 0 | Page 5 of 16
Signal Amplifier
RDAC2 can be operated as an inverting or noninverting signal
amplifier supporting linear or pseudologarithmic gains. Table 6
shows the available configurations.
The noninverting amplifier with linear gain is shown in Figure 4,
and the gain is defined in Equation 3.
R38
R
G
WB2
+=1
(3)
where R
WB2
is the resistor between the W2 and B2 terminals.
Figure 4. Linear Noninverting Amplifier
R42 can be used to set the maximum and minimum gain limits.
The inverting amplifier with linear gain is shown in Figure 5,
and the gain is defined in Equation 4.
Note that the input signal, V
IN
, must be negative.
R38
R
G
WB2
−=
(4)
where R
WB2
is the resistor between the W2 and B2 terminals.
Figure 5. Linear Inverting Amplifier
Table 6. Amplifier Selection Link Options
Amplifier Gain Link Label V
IN
Range
Noninverting
Linear
A27
LINEAR
0 V to V
DD
A29 NON-INV
A30 NON-INV
Inverting
Linear
A27
LINEAR
−V
DD
to 0 V
A29 INV
A30 INV
V
IN
RDAC2
B2
R42
W2
B2
W2
V
OUT
OAVOUT
C1
10nF
R41
1.7kΩ
R38
2.7kΩ
10366-004
V
IN
RDAC2
B2
R42
W2
B2
W2
V
OUT
OAVOUT
C1
10nF
R41
1.7kΩ
R38
2.7kΩ
10366-006