71M6521 Demo Board User’s Manual
Revision 2.18
© 2005-2009 TERIDIAN Semiconductor Corporation
Page: 83 of 111
4.3 64-PIN DEMO BOARD ELECTRICAL SCHEMATIC (D6521T4A10)
Figure 4-5: D6521T4A10 Demo Board: Electrical Schematic 1/3
C51
220pF
IA
C52
220pF
DO NOT INSTALL
TANTALUM
GND
FEMALE: WM2011-ND
C10
1000pF
J3
1
2
IB
GND_2
V3P3
C37
0.1UF
MALE: WM2700-ND
GND
L11 600 OHM
C17
0.1uF
V2P5
GND
V3P3
STAR CONNECTION
AT U5-50
R86
20.0K, 1%
C33
100pF
R83
16.9K 1%
GND
GND
Y 1
32.768kHz
3
4
R88
0
IB
J16
1
2
XIN
TANTALUM
XOUT
D3
1N4736A
1
2
C6
0.43uF, 630VDC
6.8V 1W
radial lead style
R118
100, 2W
125LS30
R6
100, 2W
C32
0.03uF, 250VDC
RV1
VARISTOR
LIVE
J4
VA_IN
1
D4
1N4148
GND
C5
0.1uF
L9
NC
*
+
C1
2200uF, 16V
*
*
R9
68.1
R4
25.5K
R7
130
R2
8.06K
= 1206 PACKAGE
U2
TL431
6
1
8
REFA
C51 and C52 should be as close as possible to IC pins
L16 600 OHM
AVX VE24M00511K
R34
30K, 2W
MT1
MOUNT
1
2
3
logo2
1
TERIDIAN
logo
1
Warning
L8
600 OHM
GND_2
D15
1N4148
GND
R8
1.5
VOLTAGE
CONNECTIONS
V3P3
NEUTRAL
C24
27pF
C25
27pF
TANTALUM
.
TP15
TP
+
C22
10uF, 6.3V
J1
+5VDC EXT SUPPLY
1
2
NEUTRAL
D8
3301D
2
1
R18
698, 1%
R16
274K, 1%
R17
270K, 1%
R15
2M, 1%, 1W
R5
5K
VA_IN
C9
1000pF
R32
750, 1%
V3P3
VA
L12
NC
J9
NEUTRAL
1
GND_2
FOR CT OPERATION:
1) POPULATE L9 AND L12
2) REMOVE R88
3) CHANGE R24/R25 TO 3.4OHM
C14
1000pF
IA_IN '
R24
NC
*
= 1206 PACKAGE
*
*
*
R14
750
C8
1000pF
IA_IN
L7
600 OHM
L6
600 OHM
C16
NC
R25
NC
CURRENT
CONNECTIONS
C15
NC
FOR SHUNT OPERATION:
1) REMOVE L9 AND L12
2) POPULATE R88
3) Only one shunt can be used at a time
TP2
VA
1
2
C50
1000pF
XT
AL_
GN
D
GND
XTAL_GND
Title
Size
Document Number
Rev
Date:
Sheet
of
D6521T4A10
10
71M6521 Demo Board Schematic SMT 64 Pin Package
TERIDIAN SEMICONDUCTOR CORP.
B
1
2
Tuesday , May 13, 2008
L2
600 OHM
IA_IN
XTAL_GND
GND_2
C31
220pF
VA
U5A
6521-TQFP
V2P5
47
G
NDA
4
9
V3P3A
50
VA
51
VB
52
IB
53
IA
54
VREF
55
V1
56
XIN
59
XOUT
61
IA
V3P3
C21
NC
L5
600 OHM
R107
3.4
IB_IN '
L4
600 OHM
C29
1000pF
*
IB_IN
C18
NC
IB_IN
R106
3.4
HEADER LOCK2
+
C2
10uF, 6.3V
+
C4
10uF, 6.3V
*
*
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.