Datasheet

Evaluation Board User Guide UG-396
Rev. 0 | Page 5 of 16
Signal Amplifier
RDAC can be operated as an inverting or noninverting signal
amplifier supporting linear or pseudo logarithmic gains. Table 5
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
WB
 1
(2)
where
R
WB
is the resistor between the W and B terminals.
VOUT2
V
IN
RDAC
B
W
+
–
W2
B2
C1
10nF
R41
1.7kΩ
R42
10624-004
R38
2.7kΩ
Figure 4. Linear Noninverting Amplifier
The inverting amplifier with linear gain is shown in Figure 5,
and the gain is defined in Equation 5.
Note that the input signal, V
IN
, must be negative.
R38
R
G
WB

(3)
where
R
WB
is the resistor between the W and B terminals.
VOUT2
V
IN
RDAC
B
W
+
–
W2
B2
C1
10nF
R41
1.7kΩ
R42
R38
2.7kΩ
10624-005
Figure 5. Linear Inverting Amplifier
Table 5. Amplifier Selection Link Options
Amplifier Gain Link(DB
1
) Link (MB
2
) Label V
IN
Range
Noninverting Linear A2 = A3-A A7 LIN 0 V to V
DD
A6 N-INV
A1 not inserted A8 N-INV
Inverting Linear A2 = A3-A A7 LIN −V
DD
to 0 V
A6 INV
A1 not inserted A8 INV
1
Daughter board.
2
Motherboard.