User manual
OLIMEX© 2012 SHIELD-EKG-EMG
Page 18 of 20
HR1x3(3.3V:Close;5V:Open)
HR2x6(1-2:Close)
10nF/X7R/10%
100pF/COG/5%100pF/COG/5%
100nF/X7R/10%
1uF/X5R/10%
1uF/X5R/10%
1uF/X5R/10%
1nF/X7R/10%
1uF/X5R/10%
100nF/X7R/10%
100nF/X7R/10%
100nF/X7R/10%
10nF/X7R/10%
10nF/X7R/10%
1nF/X7R/10%
1uF/X5R/10%
100nF/X7R/ 10%
10µF/6.3V /0805
1uF/X5R/10%
100nF/X7R/10%
10nF/X7R/10%
100nF/X7R/10%
100nF/X7R/10%
47µF/10%/6.3V/TANT(C)/ESR/0.25ohm(TR3C476K6R3C0250/1754044)
10nF/X7R/10%
100nF/X7R/ 10%
10µF/6.3V /0805
NA
NA
HR1x2(Open)
SCJ325P00XG0B02G
NA(PN1X6)
NA(PN1X6)
NA(PN1X8)
NA(PN1X8)
BAV199(1156415)
BAV199(1156415)
HR1x3(D4:Open;D9:Close)
MCP607-I/SN
MCP607-I/SN
TLC277IDR
TLC277IDR
22µH/±10%/1.7ohm/80mA(LB2012T220K/8030984)
V_REF
V_REF
V_REF
V_REFV_REF V_REF
V_REF
V_REF
V_REF
V_REF
V_REF
V_REF
V_REF
PG B1 01 06 0 3M R(F 25 9 4T R-ND)PG B1 01 06 0 3M R(F 25 9 4T R-ND)
GYX-SD-TC0805SURK(RED)
2k/1%
2k/1%
2k/1%
2k/1%
NA(3.3M)
NA(3.3M)
10k/1% 10k/1%
100k/1%
1M/1%
1k/1%
100k/1%
1M/1%
56k/1% 330k/1%
3.9k/1%
10k/1%
3.9k/1%
330R
2k/1%
10k/1%
10k/1%
10k/1%
1M/1%1M/1%
100R/1%
10k/1%
10k/1%
2k/1%
0R(bo ad m ount ed) 0R(boad m o unte d )
2k/1%
HR1x2(Open)
AP431SA
20k
INA321EA
VCCA
VCCA
VCCA
VCCA
VCCA
VCCA
VCCA
BZV55C6V2
1.5V_REF
3V_REF_ADC
3V_REF_ADC
CAL_SIG
CAL_SIG
CH1_IN+ CH1_IN-
D4
D9
GND_CAL
V_CAL
1
2
3
3.3V/5V
12
34
56
78
910
1112
AIN_SEL
C1
C2C3
C4
C5
C6
C7
C8
C9
C10
C11
C12
C13
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C24
C25
C26
C27
C28
C29
1
2
CAL
CH_IN
1
2
3
4
5
6
CON1
1
2
3
4
5
6
CON2
1
2
3
4
5
6
7
8
CON3
1
2
3
4
5
6
7
8
CON4
D1
D2
1
2
3
D4/D9
3
2
1
IC1A
5
6
7
IC1B
84
3
2
1
IC2A
5
6
7
IC2B
84
L1
PGS1PG S2
PWR
R1
R2
R3
R4
R5
R6
R7 R8
R9
R10
R11
R12
R13
R14 R15
R16
R17
R18
R19
R20
R21
R22
R23
R24R25
R26
R27
R28
R29
R30 R31
R32
1
2
REF_E
SR1
1
2
3
TR1
REF
5
RG
1
SHUTDOWN
8
V+
7
V-
4
VIN+
3
VIN-
2
VOUT
6
U1
3V3
5V
A0
A1
A2
A3
A4
A5
AREF
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
GND
GND
GND
RST
VIN
Z1
SHIELD-EKG-EMG revision B
Designed by OLIMEX LTD. 2012
http://www.olimex.com/dev/
+
1-L
2
3-R
0R 0R
C
A
R
13
A1
160 k 40k
A2
160 k40 k
A3
PO W ERANALO GDIGITALDIGITAL
ARDUINO: SH PLATFORM
CAL_SIG should be PWM output
Frequency is set to be approx: (10-14)Hz
Square wa ve Ca lib ration Si gn al
vo ltag e divider 1:20000
G=1+R12/(TR1+R11)
G=5,76...101
5Vp -p +/-10% => 250µ Vp-p +/-10%
3rd order "Besselworth" filter, fc = 40Hz.
Fc=0.16Hz
HF rejectionHigh Voltage protection
High-Pass filter
OAmp with regulated gain!
G= (R17/R16)+1= 3.56
1 pole
Fc=0.16Hz
High-Pass filter
1 pole
G=5*(1+R8/R7)=10
1.5V_REF_BUF
Instrumental Amplifier
Whe n 5 V po we r suppl y is used :
Whe n 3 .3 V po we r suppl y i s used:
3.3V p-p +/-1 0% = > 165µ Vp -p +/ -10%