Analog Devices EVAL-AD5162SDZ User Manual page 5

EVAL-AD5162SDZ User Guide
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.
R
= 1 + WB2
G
R38
where R is the resistor between the W2 and B2 terminals.
WB2
R41
1.7kΩ
V
IN
R38
2.7kΩ
W2
W2
RDAC2
Figure 4. Linear Noninverting Amplifier
R42 can be used to set the maximum and minimum gain limits.
Table 6. Amplifier Selection Link Options
Amplifier
Noninverting
Inverting
V
OUT
C1
OAVOUT
10nF
B2
R42
B2
Gain
Linear
Linear
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
R
= − WB2
G
R38
where R is the resistor between the W2 and B2 terminals.
WB2
(3)
V
IN
Link Label
A27 LINEAR
A29 NON-INV
A30 NON-INV
A27 LINEAR
A29 INV
A30 INV
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, must be negative.
IN
R41
1.7kΩ
R38
V
2.7kΩ
OUT
C1
OAVOUT
W2
10nF
B2
W2
R42
B2
RDAC2
Figure 5. Linear Inverting Amplifier
V Range
IN
0 V to V
DD
−V to 0 V
DD
UG-348
(4)