DM240021 Microchip Technology, DM240021 Datasheet - Page 31
DM240021
Manufacturer Part Number
DM240021
Description
KIT STARTER MPLAB FOR PIC24H
Manufacturer
Microchip Technology
Series
MPLAB®r
Type
MCUr
Datasheet
1.DM240021.pdf
(44 pages)
Specifications of DM240021
Contents
Board, Cable, CD
Processor To Be Evaluated
PIC24H128GP504
Data Bus Width
16 bit
Silicon Manufacturer
Microchip
Core Architecture
PIC
Core Sub-architecture
PIC24
Silicon Core Number
PIC24H
Silicon Family Name
PIC24HJxxxGPxxx
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
PIC24H
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DM240021
Manufacturer:
Microchip Technology
Quantity:
135
Company:
Part Number:
DM240021
Manufacturer:
MICROCHIP
Quantity:
12 000
© 2008 Microchip Technology Inc.
4.1.4
The starter kit features an analog conditioning circuit (see schematics in Figure A-4),
which can be used by the user to plug in a wide range of external analog sensors. The
analog conditioning circuit has a differential amplifier followed by an anti-aliasing low
pass filter. The gain of the differential amplifier is given by Equation 4-1 in terms of the
resistors used and differential input voltages at input points TP11 and TP12. The gain
is fixed at 100. Any sensor with a differential compensated output voltage of less than
33mV can be used.
EQUATION 4-1:
The anti-aliasing filter is a 2nd-order low-pass filter, with a cut-off frequency of ~500 Hz
(483.78 Hz). The highest frequency of the base band sensor signal is assumed to be
less than 500 Hz. The output of the low-pass filter is connected to the ADC input AN7
on the PIC24H MCU device.
Analog Conditioning Circuitry
DIFFERENTIAL AMPLIFIER GAIN
Gain
R
R
f
i
=
=
=
R
---- - V
R
R57
R51
f
i
(
TP11
=
=
R58
R53
–
V
TP12
)
Hardware
DS51780A-page 27