PIC16F690DM-PCTLHS Microchip Technology, PIC16F690DM-PCTLHS Datasheet - Page 17

• Manufacturer Part Number: PIC16F690DM-PCTLHS
• Description: BOARD DEMO PICTAIL HUMIDITY SNSR
• Manufacturer: Microchip Technology
• Series: PICtail™r

Specifications of PIC16F690DM-PCTLHS

• Sensor Type: Humidity
• Sensing Range: 1 ~ 99% RH
• Interface: Analog
• Voltage - Supply: 5V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP6291, PIC16F690
• Processor To Be Evaluated: MCP6291 and PIC16F690
• Interface Type: ICSP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162061 - HEADER INTRFC MPLAB ICD2 20PIN
• Sensitivity: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

4.9.3.6
Figure 4-15
pass filter with Chip Select. Use the FilterLab
from Microchip to determine the R and C values for the
op amp A’s second-order filter. Op amp B can be used
to add a pole-zero pair using C
FIGURE 4-15:
Feedback Low-Pass Filter with an Extra Pole-
Zero Pair.
4.9.3.7
Figure 4-16
filter with Chip Select. Use the FilterLab
Microchip to determine the R and C values for the op
amp A’s second-order filter. Op amp B can be used to
add a pole-zero pair using C
FIGURE 4-16:
Low-Pass Filter with an Extra Pole-Zero Pair and
Chip Select.
© 2007 Microchip Technology Inc.
V
V
IN
IN
R
R
C
4
3
2
is a second-order multiple feedback low-
is a second-order, Sallen-Key low-pass
R
R
Second-Order MFB Low-Pass Filter
with an Extra Pole-Zero Pair
Second-Order Sallen-Key Low-Pass
Filter with an Extra Pole-Zero Pair
R
3
C
2
R
R
2
1
5
4
R
1
C
Second-Order Multiple
Second-Order Sallen-Key
R
C
2
A
A
1
1
3
, R
MCP6295
3
MCP6295
, R
5
CS
R
and R
R
CS
6
6
5
and R
®
6
C
R
software from
.
B
C
B
3
7
R
7
3
.
6
®
software
V
V
OUT
OUT
4.9.3.8
The low-pass filter shown in
require external capacitors and uses only three
external resistors; the op amp’s GBWP sets the corner
frequency. R
and R
the frequency response, Q needs to be low (lower
values need to be selected for R
amplifier bandwidth varies greatly over temperature
and process. However, this configuration provides a
low cost solution for applications with high bandwidth
requirements.
FIGURE 4-17:
Low-Pass Filter with Chip Select.
V
MCP6291/1R/2/3/4/5
V
REF
IN
3
R
is used to set the Q. To avoid gain peaking in
2
1
Capacitorless Second-Order
Low-Pass filter with
and R
A
2
Capacitorless Second-Order
are used to set the circuit gain
MCP6295
R
3
CS
Figure 4-17
R
Chip Select
3
B
1
DS21812E-page 17
). Note that the
does not
V
OUT