Microchip Technology MCP6S22 PGA PICtail, Руководство пользователя

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MCP6S2X Evaluation Board
(Rev. 4) User’s Guide

2004 Microchip Technology Inc. DS51327B-page 7
Chapter 1. MCP6S2X Evaluation Board (Rev. 4)
1.1 INTRODUCTION
The MCP6S21/2/6/8 family of Programmable Gain Amplifiers (PGA) is available with
one, two, six or eight signal input channels, respectively. The user can digitally select
a specific input channel and set the gain. This family of PGAs can be evaluated using
the MCP6S2X Evaluation Board (Rev. 4). The evaluation board schematic is shown in
Figure 1-1. This board uses the MCP6S21 and MCP6S26 to allow the user to connect
two signal sources to evaluate the PGAs. The 10 k
Ω
pull-up resistors provide noise
immunity for the PGA digital input pins.
FIGURE 1-1: MCP6S2X Evaluation Board (Rev. 4) simplified schematic.
V
DD
CH5
CH4
CH3
CH2
CH1
CH0
V
OUT
CS
SCK
SI
SO
V
DD
V
DD
V
REF
2.5V
ADJ. V
REF
READ
JP1
RA3
RA5
RA2
RC0
RC1
RC2
RC3
RC4
RC5
V
IN_1
V
IN_0
V
OUT_1
V
OUT_2
PIC16F676
MCP6S26
MCP6S21
DIP Switch
V
OUT
CH0
V
REF
CS
SCK
SI
Switch
V
REF
RA1
RA0
ICSP™
VPP
V
DD
GND
PGD
PGC
LVP
J6
Connector
Switch
20 k
Ω
MCLR
V
DD
470
Ω
0.1 µF
JP2
J1
V
DD
V
DD
Select
V
DD
GND
10 k
Ω
V
DD
10 k
Ω
V
DD