Microchip Technology MCP651, Руководство пользователя

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Possible Modifications
©
2009 Microchip Technology Inc. DS51834A-page 21
3.3 CHANGES TO ACCOMMODATE OTHER DUTS
This section focuses on methods to connect to other DUTs; the circuit’s design is not
changed. Parts information can be found in
Appendix B. “Bill Of Materials (BOM)” .
3.3.1 Pinout
Figure 3-1 shows the MCP651 op amp’s pinout. This is the standard 8-lead pinout,
except for pins 5 and 8 (V
CAL
and CAL/CS). The MCP651 Input Offset Evaluation
Board is designed to take advantage of these input pins, but they are not necessary to
this board’s operation.
FIGURE 3-1: MCP651 Pinout.
Op Amps with No Connection (NC) at pins 1, 5 and 8 will operate properly on the
MCP651 Input Offset Evaluation Board. Other op amps may need to use an adaptor
board; see
Section 3.3.5 “Other Single Op Amps” .
3.3.2 Removing the DUT
Since these boards come with the DUT (in SOIC-8) soldered on, it is necessary to
de-solder them. Figure 3-2 shows the location of the DUT for either a SOIC-8 or a
PDIP-8 package. A good de-soldering station makes this work much easier to do.
FIGURE 3-2: DUT’s Location on the PCB.
MCP651
SOIC
V
IN
+
V
IN
–
V
SS
V
DD
V
OUT
1
2
3
4
8
7
6
5 V
CAL
CAL/CS NC
DUT in PDIP-8 DUT in SOIC-8