1
2
3
4
56
A
B
C
D
6
5
4
3
2
1
D
C
B
A
ti
12500 T
I B
oulev
ar
d.
Dallas
, T
ex
as
75243
Ti
tle
:
SHEET:
O
F:
FI
LE:
S
IZ
E:
DAT
E
:
REV:
6-
Mar
-2003
D
raw
n B
y:
E
ngi
ne
er
:
Rev
is
ion His
tor
y
REV
E
CN Nu
m
be
r
Ap
pr
ov
ed
D
A
C7731_Re
vA
.S
ch
DO
CUM
ENT
C
O
N
T
R
O
L #
C1 0.
1µ
F
C7 0.
1µ
F
C2
0.
1µ
F
VC
C
CS SC
LK
LDA
C
RS
T
R
S
T
SEL
R6
10K
VSS
2
3
6
4
7
1
5
U2
Op
A
m
p
VC
C
C10
0.
01µ
F
C9
0.
01µ
F
R12 10K
W1
5
C12
1n
F
1
2
3
4
5
6
A
B C
W1
3
C
L
D_
OU
T
W5
R8
0
DA
C_V
O
UT
GND
4
TR
IM
5
NC
1
NC
7
NC
8
TE
M
P
3
OU
T
6
V+
2
U3
RE
F102A
U
(8)
C11 10µF
C3 0.
1µF
VC
C
1
3
TP
1
TP
2
EXT
ER
N
A
L
RE
F
E
RE
NCE
1
2
3
R11
100K
R10 20K
(e
xR
E
F
in
)
1
2
3
R9 20K
VC
C
VD
D
VD
D
VC
C
W4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
J4
ex
RE
F
in
RS
T
S
E
L
RS
T
LDA
C
CS
1
2
3
4
5
6
7
8
9
10
J6
C6
10µ
F
C4 10µ
F
C5 10µ
F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
J2
DA
C7731
A
1
J.
PAR
G
U
IA
N
W2
W1
VSS
W7
W1
0
R3
100K
C8 1µ
F
R1
10K
R2
10K
R7 0/
5K
/20K
VD
D
W3
R4
10K
W8
DA
C_V
O
UT
S
um
_J
unc
S
um
_J
unc
ex
RE
F
in
VSS
VSS
+R
EF
in
+R
EF
in
W6
W9
T
ant
alum
RE
F
_en
RE
F
_en
1
C13
0.
1µ
F
C14
10µ
F
SD
O
19
SC
LK
21
SD
I
18
VD
D
12
RE
F
in
3
RE
F
out
2
Vr
ef
5
DG
ND
13
CS
20
LDA
C
17
RS
T
16
R
S
T
SEL
22
RE
F
E
N
23
RE
F
adj
4
Ro
ffs
et
6
AG
N
D
7
RF
B
2
8
RF
B
1
9
SJ
10
V
out
11
T
EST
14
VC
C
1
VSS
24
U1
D
A
C7731
SD
I
SC
LK
SD
O
R13 10K
R5 10K
W1
4
W1
6
SD
O
W1
9
W1
7
W1
8
R
S
T
SEL
RS
T
LDA
C
CS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
P2
RE
F
_en
SC
LK
SD
I
CLK
R
CLK
R
FS
R
FS
R
DR
DR
TP
3
TP
4
6443163
1
2
3
J1
1
2
3
J3
VD
2
JP
2
JP
2
JP
4
JP
4
JP
6
JP
6
JP
8
JP
8
JP
10
JP
10
JP
12
JP
12
JP
14
JP
14
JP
16
JP
16
JP
18
JP
18
JP
20
JP
20
+5
VA
-5
V
A
VD
D
+3
.3
VD
VD
2
VD
1