Microchip Technology MCP6 series, Руководство пользователя

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MCP6XXX Amplifier Evaluation Board 3 User’s Guide
DS51673A-page 12
©
2007 Microchip Technology Inc.
The jumper JP
S1
positions have the following effects:
Figure 2-8 shows an example supported by the MCP6XXX Amplifier Evaluation Board
3. It is assumed that V
A
is a differential mode input signal.
FIGURE 2-8: Difference Amplifier Example Supported by the MCP6XXX
Amplifier Evaluation Board 3.
Jumper JP
S1
Position
Effects
V
1
= V
2
=
1 V
A
V
A
V
A
is a common mode input signal
2 V
A
–V
A
V
A
is a diffential mode input signal
3 V
A
V
B
V
A
and V
B
are connected directly to V
1
and V
2
Note 1: When JP
S1
is in position 2, V
2
is actually described by the following equation:
It is assumed that R
S2
= R
S1
.
V
2
V
R
V
A
V
R
–
( )
R
S2
R
S1
⁄
( )
– =
V
R
1 R
S2
R
S1
⁄
+
( )
V
A
R
S2
R
S1
⁄
( )
– =
U1
VDD
0.1 µF
CU1
CP1
1.0 µF
Power Supply
GND
VDD
DP1
GND
VL
VREF
RISO
RL CL
R1
R4
R3
R2
GND
VA
VB
2
3
1
Mid-supply
Reference
Block
Source
Configuration
Block
* Test Points
*
*
*
*
*
*
*
*