Welch Allyn Atlas - Page 4

A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Isolation
Barrier
Isolated SpO2
Circuits
Grounded SpO2
Circuits
Nonin SpO2
Connector
Nellcor SpO2
Connector
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
B See ECN worksheet
SpO2 ESD
Ground
D
5-39455 LPP LPP4/27/99
Improvements for ESD, RFI,
and Fast Transients, Correct
Respiration Diff-Amp Topology
6/24/99LPP5-39821
E
Mods to U2 clock line, Resp
gain amp, ECG supply and
NVRAM pullup
7/9/995-39936 LPP
LPP
REV
Description
ECN/ECO Init
Date Ckd
A Release to Production
620017
E
Power Isolation and SpO2 Interface
C
4
8Tuesday, July 13, 1999
Title
Size
Document Number
Rev
Date: Sheet of
Welch Allyn Inc.
Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
U402-1
C409-1
T401-4
Q401-g
U402-sen
opto-fb
iso401-a
Q402-e
Q401-s
U401-1
C408-2
U401-2
iso401-b
sSpO2tx
Q403-e
sSpO2tx
U402-e
U402-ref
U402-rt
iso402-a
U401-5
U401-3
U403-fb
f-V
f+V T401-1
T401-8
U401-7
R419-2
U402-ct
U411-6
FE-Pwr-Sync
SpO2Out
+5V
+12V
+12V
s+5V
f+V
+5V
fVcc
fVee
f+5V
f+V
SpO2-Reset
s+5V
iso+5Vdig
s-5V
s-5V
s+5V
iso+5Vdig
s+5V
f+V
S
S
S
S
S S
iso+5Vdig
S
S
S
S
ED
ED
SS S
S S
S
SS
S
SSS
S
S S
S
S
S
S
S
ED SE
S
S
S
S
+ C431
10uF
TP451
TP459
J403
Tab-.187
1
2
+
-
U401B
LM358
5
6
7
84
+
C432
10uF
TP466
TP462
+
-
U401A
LM358
3
2
1
84
TP464
R405
215
TP455
R423
5.11K
C404
.047uF
C409
470pf
C436
1000pF
R414
1.96K
T401
IsoXfmr
5
8
1
2
3
4
TP463
C411
2200pF
TP452
C401
.047uF
C403
.047uF
TP460
R424
10K
R417
10K
TP449
TP461
+ C406
100uF
C417
680pF
TP453
R415
100
TP467
TP465
TP454
C430
.047uF
R412
196
+
C407
100uF
D403
MBRS130T3
U407
78L05
81
2 3 6 7
INOUT
GND GND GND GND
R404
196K
TP450
D401
MBRS130T3
C416
.047uF
R401
10K
+ C405
100uF
+ C434
10uF
L401
220uH
U410
4N25
1 6
2
5
4
TP468 L402
220uH
J402
CON14AP
1
3
5
7
9
11
13
2
4
6
8
10
12
14
+
+
+
+
+
+
+
+
+
+
+
+
+
+
TP456
C429
.047uF
C402
.047uF
C420
.047uF
R411
5.11K
R407
10
U411
HCNW4503
2
3
8
6
5
D405
BAV99L
1
3
2
R403
1K
R409
5.11K
R408
100
TP457
C410
.01uF
+
C435
10uF
U404
79L05
21
3
6
7
5
INOUT
IN
IN
IN
GND
C413
.047uF
R406
0.2
J401
CON4
1
2
3
4
R419
215
C414
.047uF
U403
LP2951C
8
7
3
6
2
1
5
4
VIN
FDBK
SHTDN
TAP
SENS
VOUT
ERR
GND
R410
7.5K
TP469
+ C418
4.7uF
R422
10K
C433
470pf
U402
LM3524DM
1
2
16
15
9
4
5
10
6
7
12
11
13
14
3
8
V-
V+
VREF
VIN
COMP
+SENSE
-SENSE
SHTDWN
RT
CT
CA
EA
CB
EB
OSCOUT
GND
+ C412
10uF
Q402
MMBT3906L
3
1
2
TP458
C408
.01uf
R402
10K
+ C419
10uF
Q403
MMBT3904L
3
1
2
C422
.047uF
R416
10K
+ C415
1uF
Q401
MTD3055V
23
1
4
C424
.047uF
+
C421
1uF
+ C428
10uF
C427
.047uF