Cirrus Logic CS5467 - Manual (Page 43)

CS5467
DS714F3 43
11. BASIC APPLICATION CIRCUITS
Figure 14 shows the CS5467 configured to measure
power in a single-phase, 3-wire system while operating
in a single-supply configuration. In this diagram, current
transformers (CT) are used to sense the line currents
and voltage dividers are used to sense the line voltages.
CS5467
R
1
R
2
9
IIN1-
10
19
20
IIN1+
PFMON
CPUCLK
XOUT
XIN
Optional
Clock
Source
Serial
Data
Interface
RESET
2
1
CS
7
SDI
27
SDO
6
SCLK
5
INT
24
E1
0.1 µF
VREFIN
12
VREFOUT
11
AGND DGND
17 4
4.096 MHz
R
V-
IS
O
L
A
T
IO
N
(O
pt
io
na
l)
Pulse Output
Counter
26
25
C
Idiff
C
V+
C
V-
C
Vdiff
E2
IIN2-
IIN2+
R
I-
R
I+
C
Idiff
15
16
21
28
23
VIN1-
VIN1+
LOAD
CT
CT
R
I-
R
I+
LOAD
R
1
R
2
13
14
R
V-
C
V+
C
V-
C
Vdiff
VIN2-
VIN2+
VA+ VD+
0.1 µF 470 µF
500 
2 uF
500
L2
10 
3
0.1 µF
10 k

5 k
L1
18
N
½ R
Burden
½ R
Burden
½ R
Burden
½ R
Burden
C
I-
C
I+
C
C
C
I-
C
I+
C
C
Figure 14. Typical Connection Diagram (Single-phase, 3-wire – Direct Connect to Power Line)