71M6521 Demo Board User’s Manual
Revision 2.18
© 2005-2009 TERIDIAN Semiconductor Corporation
Page: 81 of 111
4.2 64-PIN DEMO BOARD ELECTRICAL SCHEMATIC (D6521T4A8)
Figure 4-3: D6521T4A8 Demo Board: Electrical Schematic 1/2
DO NOT INSTALL
DO NOT INSTALL
DO NOT INSTALL
DO NOT INSTALL
TANTALUM
GND
C10
NC
GND
V3P3
C37
0.1UF
1
2
TP1
IA
GND
C17
0.1uF
V2P5
GND
V3P3
STAR CONNECTION
AT U5-50
C33
100pF
R86
20.0K, 1%
R83
16.9K 1%
1
2
TP10
V1
C31
NC
2
1
D9
NC
GND
GND
Y 1
32.768kHz
R88
0
IB
XIN
GND
TANTALUM
XOUT
1
2
D3
1N4736A
C6
0.47uF, 1000VDC
6.8V 1W
radial lead style
R118
100, 2W
125LS30
R6
100, 2W
C32
0.03uF, 250VDC
RV1
VARISTOR
LIVE
1
J4
VA_IN
D4
1N4148
1
2
3
J1
RAPC712
GND
C5
0.1uF
L9
NC
*
+
C1
2200uF, 16V
*
+5VDC EXT SUPPLY
*
R9
68.1
R4
25.5K
R2
8.06K
R7
130
= 1206 PACKAGE
6
1
8
U2
TL431
REFA
AVX VE24M00511K
C11
0.1uF
1
2
3
4
MT1
MOUNT
1
logo2
TERIDIAN
1
logo
Warning
L8
600 OHM
GND
IA
R8
1.5
1
2
TP19
IA
VOLTAGE
CONNECTIONS
V3P3
C24
27pF
C25
27pF
TANTALUM
.
TP15
TP
+
C22
10uF, 6.3V
NEUTRAL
R18
698, 1%
2
1
D8
3301D
R15
2M, 1%, 1W
R16
274K, 1%
R17
270K, 1%
R5
5K
VA_IN
C9
1000pF
R32
750, 1%
V3P3
GND
VA
L12
NC
1
J9
NEUTRAL
FOR CT OPERATION:
1) POPULATE L9 AND L12
2) REMOVE R88
3) CHANGE R24/R25 TO 3.4OHM
C14
1000pF
IA_IN '
R24
10K
*
= 1206 PACKAGE
*
*
*
Note: R24 is 10K and R25 is
NC if using current shunt for
channel A.
R14
750
C8
1000pF
IA_IN
L7
600 OHM
L6
600 OHM
1
2
3
J3
C16
330pF
R25
NC
CURRENT
CONNECTIONS
C15
330pF
FOR SHUNT OPERATION:
1) REMOVE L9 AND L12
2) POPULATE R88
3) Only one shunt can be used at a time
1
2
TP2
VA
C50
1000pF
GND
Title
Size
Document Number
Rev
Date:
Sheet
of
D6521T4A8
8
71M6521 Demo Board Schematic SMT 64 Pin Package
TERIDIAN SEMICONDUCTOR CORP.
B
1
2
Thursday , January 31, 2008
L2
600 OHM
IA_IN
GND
GND
VA
V2P5
47
G
NDA
4
9
V3P3A
50
VA
51
VB
52
IB
53
IA
54
VREF
55
V1
56
XIN
59
XOUT
61
U5A
6521-TQFP
IB
IA
V3P3
C21
1000pF
L5
600 OHM
R107
3.4
IB_IN '
L4
600 OHM
C29
1000pF
*
IB_IN
C18
1000pF
IB_IN
R106
3.4
+
C2
10uF, 6.3V
+
C4
10uF, 6.3V
*
*
1
2
3
J16
R104
750
Note: R106 is 10K and
R107 is NC if using current
shunt for channel B.
Make C18 and C21 100pF if
channel B is used for
current shunt.