Amplifier Configuration Block
Row Part Name
Function
Default Value
A
R36
This resistor with D sets the first gain stage of the
amplifier. The resulting gain is G
1
= D/A.
10k
B
R33
Current loop feedback gain resistor.
1k
C
R22
Sets the gain in voltage mode for the amplifier. The
resulting gain for this stage is G
2
= C/1k.
10k
D
R55
With A, this resistor value sets the first gain stage
for the amplifier. The resulting gain for this stage is
G
1
= D/A.
10k
E
C10
Current loop error feedback integration capacitor
22nF
F
C9
Current loop feedback compensation capacitor –
typically use factory value of 2.2nF.
2.2nF
G
-
Do not make connections in this position.
open
H
-
This enables the integrator clearing circuitry and
must be installed for it to function properly.
short
Table 2. Details of the various configuration options.
Power Amplifier Module User's Guide
17
Figure 6. Schematic representation of the amplifier.
Shutdown
and
Enable Logic
/Enable
Enable
Power
Monitor
Output Disable
Ref+
Ref-
Differential
Input
A
D
C
1k
1k
Voltage
Current
H
F
E
B
Gain = 20
Current Monitor
J1
J2
SW1 - Integrator Reset
SW1
Differential
Output
500mV / A
1k
