A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
PWM
A/D
Converter
833uSec
-5V
(U604-10)
Integrator
Input
A/D Mux
+5V
(U602-7)
Serial/Parallel
Control Data
PWM-Out
Comparator
Inputs
PWM-timer
Isolation
Barrier
52uSec
Analog In
Temperature
Amplifier
0.1%
Temperature
Thermistor
MuxB
MuxA
U605 U606
620017.dsn
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
3/15/99JAC5-39121 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
U608 U609
U601
U603
U608 U609U603U602
U602U601
B See ECN worksheet 5-39455 LPP 4/27/99
D
Improvements for ESD, RFI,
and Fast Transients, Correct
Respiration Diff-Amp Topology
LPP
6/24/995-39821 LPP
Mods to U2 clock line, Resp
gain amp, ECG supply and
NVRAM pullup
E 7/9/99LPP5-39936
LPP
620017
E
ECG A/D and Interface
C
6
8Wednesday, July 14, 1999
Title
Size
Document Number
Rev
Date: Sheet of
Welch Allyn Inc.
Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV
Description
ECN/ECO Init
Date Ckd
A Release to Production
U605-out
U603out
Mux-A/D-B
U610-6
U602-7
iso604-a
U602-5
iso601-a
Mux-A/D-C
Mux-A/D-A
U602-3
iso602-a
U604-8
Q601-e
U604-6
D601-2
U604-10
U608-2
U608-3
SW-RL-V
U601-7
Resp-LdsOff
Sw-RespReset
MuxB
U604-4
iso603-a
U612-6
U602-2
Temp-In
MuxA
Patient-Temp
MonBw
U601-2
U601-1
U601-3
U608-1
U604-2 U613-6
U604-1U604-3
U611-6
U604-5
U605-12
FE-Data-In
f+1.24V
An-ECG
LL
Mux-LdS-B
LA
FE-PWM-ADC
FE-ADC-Clock
Mux-LdS-A
RA
V+
Mux-LdS-C
FE-Data-Clock
vRL
iso+5Vdig
+5V
+Clamp-Clamp
f+1.24V
An-Resp
Resp-DC
f+1.24V
SpO2-Reset
Sw-MonBw
+5V
+5V
iso+5Vdig
+5V
f+5V
Resp-Off
fVee
fVcc
Resp-Reset
SW-RLD-V
SW-RLD-RL
SW-RLD-LL
SW-RLD-LA
SW-RLD-RA
E
f+5V
f+5V
ED
ED
E
fVee
E E
f+5V
fVcc
ED
f+5V
fVcc
E
f+5V
E
E
ED
E
iso+5Vdig
E
E
fVee
fVcc
fVee
fVcc
fVcc
fVcc
ED ED
E
E
iso+5Vdig
ED
iso+5Vdig
iso+5Vdig
E
iso+5Vdig
f+5V
ED
f+5V
ED
ED
ED
EE E
E E E
E E
E
E
E E
fVee
fVcc
fVee
fVcc
fVee
fVee
fVcc
fVee
fVee
fVcc
fVcc
ED
ED
ED
E
U606
74HCT595
14
11
10
12
13
15
1
2
3
4
5
6
7
9
168
SER
SRCLK
SRCLR
RCLK
G
QA
QB
QC
QD
QE
QF
QG
QH
QH
VCCGND
TP621
U604F
74HCT04
13 12
147
TP603
TP624
TP639
R630
10K
C638
.047uF
R625
1K
U604A
74HCT04
12
147
U609
4051
13
14
15
12
1
5
2
4
6
11
10
9
3
16 8
7
X0
X1
X2
X3
X4
X5
X6
X7
INH
A
B
C
X
VDD VSS
VEE
C637
.047uF
R604
10K
C646
1000pF
C624
.047uF
R603
46.4K
TP642
R601
10K
TP623
R602
73.2K
R631
5.11K
R605
3.48K
R623
46.4K
TP636
R607
464K
C632
.047uF
C645
100pF
J601
CON2
1
2
R608
1K
TP631
U611
HCNW4503
2
3
8
6
5
+
-
U602
LM311
2
3
7
5
6
4
1
8
U613
HCNW4503
2
3
8
6
5
TP640
Q601
MMBT3904L
3
1
2
U612
HCNW4503
2
3
8
6
5
TP637
C629
.047uF
R611
6.19K
TP641
TP604
R610
511
TP633
TP616
R613
6.19K
U605
74HCT595
14
11
10
12
13
15
1
2
3
4
5
6
7
9
168
SER
SRCLK
SRCLR
RCLK
G
QA
QB
QC
QD
QE
QF
QG
QH
QH
VCCGND
U604C
74HCT04
56
147
C640
.047uF
C603
680pF
R621
215
C639
.047uF
TP629
TP617
C642
0.1uF
U604D
74HCT04
9 8
147
R615
6.19K
C641
0.1uF
TP618
C631
.047uF
TP643
TP628
TP627
R622
46.4K
+
C609
4.7uF
U604E
74HCT04
11 10
147
U610
HCNW4503
2
3
8
6
5
R619
619
TP632
R620
619
TP635
C633
.01uF
C636
2200pF
R624
51.1K
C625
.047uF
TP625
C601
1000pF
+
-
U601A
MC34072
3
2
1
84
C626
.047uF
C627
.047uF
TP638
TP630
TP610
C634 .01uF
R632
5.11K
R617
2.15K
TP611
C647
100pF
TP601
TP626
+
-
U608A
AD712
3
2
1
84
C628
0.1uF
D601
MMBD1503A
1
3
2
R626
1K
C623
.047uF
R629
10K
TP615
C635 .01uF
C621
0.1uF
TP609
C644
220pF
+
-
U607B
LM393
5
6
7
84
+
C614
4.7uF
C622
.047uF
+
-
U607A
LM393
3
2
1
84
+
C630
4.7uF
TP612
D602
BAV99L
1
3
2
U604B
74HCT04
34
147
TP613
+
-
U601B
MC34072
5
6
7
84
TP605
C643
220pF
TP614
TP606
R627 1.21K
U603
4051
13
14
15
12
1
5
2
4
6
11
10
9
3
16 8
7
X0
X1
X2
X3
X4
X5
X6
X7
INH
A
B
C
X
VDD VSS
VEE
TP620
TP607
R606
3.48K
R628
10K
+
-
U608B
AD712
5
6
7
84
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