Broadcom
ACPL-C740-EvalKit-UG100
10
ACPL-C740 Evaluation Kit Board
User Guide
Isolated Sigma-Delta Modulator
Figure 7: PCB Description
C740-SDM-EVBD Schematic Diagram
Figure 8: C740-SDM-EVBD Schematic Diagram
3.3V
Regulator
2.5V
Regulator
1.2V
Regulator
+
10 uF
C1
0.1 uF
C2
0.1 uF
C13
22 nF
C10
10R
R5
10R
R6
0R
R1
1 uF
DNM
C14
DNM
0R
R7
VDD2
MDAT
MCLK
DNM
0R
R3
DNM
10m
Rsm
DNM
10m
Rshunt
100 nF
C12
RUBBER
FOOTER
RF1
Vdd1
+
10 uF
C15
VDD1
1
VIN+
2
VIN-
3
GND1
4
GND2
5
MDAT
6
MCLK
7
VDD2
8
U1
ACPL-C740
0R
R8
GND1
GND1
GND2
P1
P2
RSHUNT-
0R
R9
0R
R10
RUBBER
FOOTER
RF2
RUBBER
FOOTER
RF3
RUBBER
FOOTER
RF4
GND2
5VCC
1
2
3
4
5
6
7
8
J5
Header pin 1x8 RA
+
10 uF
C11
OUTA
1
GND
2
CSET
3
EN
4
VREG
5
RSET
6
VDD
7
GND
8
OUTB
9
OUTB
10
SGND
11
OUTA
12
U9
PE22100
VIN
1
VSS
2
EN
3
NC
4
VOUT
5
U10
S-1200B50
1
2
H3
2
1
3
1:1.3
4
5
6
T1
750313638
Vdd1
GND1
1 uF
DNM
C3
+
10 uF
C4
D1
MBR0520L
D2
MBR0520L
GND1
100 nF
C9
+
10 uF
C8
470 nF
C7
100 pF
C6
5VCC
GND2
82K
R2
GND2
0R
R4
1 uF
C5
GND2
GND2
8 mm Isolation
GND2
