PIC24EP64MC204-E/PT Microchip Technology, PIC24EP64MC204-E/PT Datasheet - Page 355

• Manufacturer Part Number: PIC24EP64MC204-E/PT
• Description: 16 Bit MCU, 64KB Flash, 8KB RAM, 60 MHz, 44 Pin, MCPWM,QEI, 3 OpAmp, 4 Comp, PTG
• Manufacturer: Microchip Technology

25.1.2
Figure 25-6
with the output of the Op amp (OAxOUT) externally
routed to a separate analog input pin (ANx) on the
device. This Op amp configuration is slightly different in
terms of the Op amp output and the ADC input
connection, therefore R
transfer function. However, this configuration requires
the designer to externally route the Op amp output
(OAxOUT) to another analog input pin (ANx). See
Table 30-52
tics”
Table 30-60
tics”
requirements for the ADC module in this configuration.
calculate the expected voltage at point V
is the typical inverting amplifier equation.
FIGURE 25-6:
 2011-2012 Microchip Technology Inc.
Figure 25-6
dsPIC33EPXXXGP50X, dsPIC33EPXXXMC20X/50X, AND PIC24EPXXXGP/MC20X
Note 1: See
for the typical value of R
describe the minimum sample time (T
2: See
3: See
4: CV
OP AMP CONFIGURATION B
shows a typical inverting amplifier circuit
in
in
also defines the equation to be used to
Voltage
Section 30.0 “Electrical Characteris-
Section 30.0 “Electrical Characteris-
Bias
REF
V
IN
Table 30-52
Table 30-52
Table 30-59
(4)
1
OP AMP CONFIGURATION B
O
or CV
INT
1 is not included in the
R
1
REF
for the Typical value.
for the Minimum value for the feedback resistor.
and
INT
2
1.
V
O
Table 30-60
OAxOUT
are two options that are available for supplying bias voltage to the op amps.
Table 30-59
CxIN1-
CxIN1+
OA
X
OUT
=


SAMP
. This
R
----------------------------- -
for the minimum sample time (T
FEEDBACK
and
R
)
1
 Bias Voltage V

Op ampx
–
+

ADC
R
–
(3)
FEEDBACK (2)
IN
SAMP

R
INT
).
1
(1)
DS70657F-page 355
(V
OAxOUT
ANx
OA
X
OUT
)