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PIC16F785 Scheda tecnica(PDF) 75 Page - Microchip Technology

Il numero della parte PIC16F785
Spiegazioni elettronici  20-Pin Flash-Based 8-Bit CMOS Microcontroller with Two-Phase Asychronous Feedback PWM, Dual High-Speed Comparators and Dual Operational Amplifiers
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
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 2004 Microchip Technology Inc.
Preliminary
DS41249A-page 73
PIC16F785
11.0
OPERATIONAL AMPLIFIER
(OPA) MODULE
The OPA module has the following features:
• Two independent Operational Amplifiers
• External connections to all ports
• 3 MHz Gain Bandwidth Product (GBWP)
11.1
Control Registers
The OPA1CON register, shown in Register 11-1, controls
OPA1. OPA2CON, shown in Register 11-2, controls
OPA2.
11.2
OPAxCON Register
The OPA module is enabled by setting the OPAON bit
(OPAxCON<7>). When enabled, OPAON forces the
output driver of RC3/AN7/C12IN3-/OP1 for OPA1, and
RC2/AN6/C12IN2-/OP2 for OPA2, into tri-state to pre-
vent contention between the driver and the OPA output.
FIGURE 11-1:
OPA MODULE BLOCK DIAGRAM
Note:
When OPA1 or OPA2 is enabled, the
RC3/AN7/C12IN3-/OP1 pin, or
RC2/AN6/C12IN2-/OP2 pin respectively, is
driven by the op amp output, not by the
PORTC driver. Refer to the Electrical
specifications for the op amp output drive
capability.
OPA1
OPA1CON<OPAON>
TO ADC and Comparator MUXs
RC7/AN9/OP1+
RC6/AN8/OP1-
RC3/AN7/C12IN3-/OP1
OPA2
OPA2CON<OPAON>
TO ADC and Comparator MUXs
RB5/AN11/OP2+
RB4/AN10/OP2-
RC2/AN6/C12IN2-/OP2


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