User manual

Active Filter Demo Board Kit User’s Guide
DS51614A-page 20 © 2006 Microchip Technology Inc.
FIGURE 3-2: Filter Frequency Response.
3.3 PUTTING THE FILTER TOGETHER
Each of the components in Figure 3-1 that needs to be inserted in a socket is listed in
Table 3-1 (see Table B-5). This table gives the section number (see
Section 2.5 “Active Filter Section Set-up”) and the PCB reference designators (e.g.,
Z5). Since this design is of 5
th
order, there are no components for Section # 4.
TABLE 3-1: ACCESSORY BAG PARTS LIST
-80
-70
-60
-50
-40
-30
-20
-10
0
10 100 1,000
Frequency (Hz)
Gain (dB)
Measured
MCP601 Op Amps
Nominal Simulation
Component Values Qty Section Reference PCB Label
100 nF 1 1 C11 Z5
12 C22 Z5
13 C32 Z5
150 nF 1 3 C31 Z3
390 nF 1 2 C21 Z3
Jumper Wire (0Ω) (Note 1) 21 — Z1, Z11
12 — Z11
13 — Z11
3.16 kΩ 12 R21 Z1
5.62 kΩ 13 R31 Z1
6.81 kΩ 12 R22 Z2
10.7 kΩ 11 R11 Z2
12.7 kΩ 13 R32 Z2
MCP6271, Single Op Amp, 2 MHz,
PDIP-8, Microchip Technology Inc.
(Note 1)
10 U
1
U1
11 U
1
U1
12 U
2
U1
13 U
3
U1
Note 1: The other 6 jumpers and 1 op amp in the accessory bag are for convenience in
building other filters.