R1
R2
+5VA
+5VF
SG7
+15V
9
8
7
DGND
6
5
AGND
4
UUT
1
+3.2VREF
AGND
ANA IN
AGND
OFFSET
6
GAIN
DGND
FIFO/DIR
READ
FSTAT1
FSTAT2
START
LSB
ADS-935
B2
AB2
AB3
AB4
AB5
AB6
B7
U6
B8
22
21
AB7
AB8
C17
0.1μF
DGND
20
23
AB16
AB15
AB14
AB13
–5VA
4
5
1
2
10
L4
+5VA
GAIN ADJUST
+5VA
1
AGND
OFFSET
ADJUST
2
3
–5VA
R4
20k
1
2
3
–5VA
+5VA
R5
20k
DGND
20mH
C13
2.2μF
9
+5VF
13
12
14
U5
3
FST1
7 74HC86
DGND
C8
0.1μF
DGND
+5VF
DGND
74HC86
U5
3
EOC
AB12
AB11
AB10
74HC86
8
U5
FST2
AB9
9
8
7
6
5
4
3
2
11
1
74HCT573
U4
10
12
13
14
15
16
17
18
19
B3
B4
B5
B6
24
25
26
27
B15
B14
B13
B12
B11
B10
B9
+5VF
MSB
AB1
28
MSB
29
AB7
AB8
AB6
DGND
4
3
2
11
1
30
AB5
+5VD
5
31
+5VD
AB4
6
74HCT573
EOC
32
A
DGND AB3
7
OF
33
AB2
8
14
15
16
17
18
19
13
ENABLE
34
U3
AB1
9
B2
B3
B4
B5
B9
B6
B7
B8
B12
B13
B14
DGND
B16 (LSB)
B15
B14
B13
B12
B11
B10
B9
FIF
+5VD
COMP
1 2 3
RD
1 2 3
J5
FIFO/DIR
J4
READ
1 2 3 J2
1 2 3
J3
ENABLE
COMPLIM
B15
B16 (LSB)
START
B10
B11
18 17
16 15
14 13
12 11
10
8
6
4
2
9
7
5
3
1
DGND
DGND
ENABLE
COMPLIM
DGND
12
COMP
COMP
35
7
R3
1
DGND
RD
10
11
12
J1
AB16
AB15
L1
+5VF
AB14
AB13
AB12
L2
+5VD
AB10
20mH
AB9
20
C9
2.2μF
L3
20mH
19
AB11
18
17
16
15
20mH
14
13
9
FIF
8
3.3k
20
10
DGND
B1 (MSB)
AGND
36
C16
0.1μF
-5VA 37
–5VA
+5VA
38
11
1
+5VA
+5VF
–12/–15V
39
2
19 B1B MSB
+12/+15V
40
2
SG5
AGND
3
4
2
5
U1
74HCT74
AGND
12
U2
13
14
15
74HCT573
16
17
AGND
18 OVRFLW
DGND
AGND
0.1μF
0.1μF
B1(MSB)
B2
B3
B4
B5
B6
B7
B8
C18
0.1μF
C19
0.1μF
C20
0.1μF
C14
2.2μF
+5VD
–5VA
+5VA
+5VD
–5VA
7
6
–5VA
SG8
–15V
C2
2.2μF
SG6
AGND
+5VF
SG9
3
4
C3
0.1μF
C4
2.2μF
C1
2.2μF
C15
0.1μF
20
10
DGND
2
AMPLIFIER
OPTION
AR1
+5VA
C12
2.2μF
C21
2.2μF
3
www.cd4power.com
DGND
AGND
AGND
34 33
32 31
30 29
28 27
26 25
24 23
22 21
20 19
P1
B1B MSB
OVRFLW
EOC
DGND
DGND
DGND
DGND
DGND
4
AGND
6
5
3
1
2
2
C10
1 33pF
DGND
C7
2.2μF
DGND
N.C.
READ
FIF/DIR
FST1
FST2
C11
2.2μF
AGND
74HC86
U5 6 START
CONVERT
ANALOG INPUT
B2
2
AGND
+5VF
10
14
12
C5
11
U1
9
0.1μF
74HCT74
8
DGND
7
13
DGND
+5VF
1
X1
14
C6
2.2μF
7
5MHZ
8
DGND
START CONVERT
Preliminary Evaluation Board
- Modified ADS-B933 to include ±12V or ±15V Supplies to U6
B1
R6
3 2 1
50
Figure 4. ADS-935 Evaluation Board Schematic.
+5VD
–5VA
DGND
–15V
26
24
22
20
18
16
14
12
10
8
6
4
2
25
23
21
19
17
15
13
11
9
7
5
3
1
+15V DGND
+5VA
P2
SG1
SG2
SG3
SG4
Page 7 of 8
AGND
DGND
MURATA-PS [ MURATA POWER SOLUTIONS INC. ]
