AD7755
0.8
0.6
–40 C PF = 0.5
0.4
0.2
% ERROR
0.4
PF = 0.5
GAIN = 8
ON-CHIP REFERENCE
0.3
0.2
0.1
% ERROR
PF = 1
GAIN = 16
EXTERNAL REFERENCE
–40 C
+25 C PF = 1
0.0
–0.2
–0.4
+85 C PF = 0.5
–0.6
–0.8
0.01
+25 C PF = 0.5
+25 C
0.0
–0.1
+85 C
–0.2
–0.3
–0.4
0.01
0.1
1
Amps
10
100
0.1
1
Amps
10
100
Figure 8. Error as a % of Reading (Gain = 8)
Figure 11. Error as a % of Reading over Temperature with
an External Reference (Gain = 16)
0.4
–40 C PF = 0.5
0.8
0.6
PF = 1
0.4
+25 C PF = 1
0.2
0.0
% ERROR
% ERROR
–0.2
+25 C PF = 0.5
–0.4
–0.6
–0.8
–1.0
0.01
PF = 0.5
GAIN = 16
ON-CHIP REFERENCE
0.1
1
Amps
10
100
+85 C PF = 0.5
0.2
PF = 0.5
0.0
–0.2
–0.4
–0.6
45
50
55
60
65
FREQUENCY – Hz
70
75
Figure 9. Error as a % of Reading (Gain = 16)
Figure 12. Error as a % of Reading over Frequency
V
DD
10 F
100nF
100nF
10 F
0.4
0.3
0.2
–40 C
0.1
% ERROR
40A TO
40mA
PF = 1
GAIN = 2
EXTERNAL REFERENCE
AVDD AC/DC AVDD
1k
NC
V1P
F1
F2
U1
AD7755
CF
REVP
NC
CLKOUT
V2N
33nF
1k
V2P
33nF
REF
IN/OUT
CLKIN
G0
G1
S0
GAIN
SELECT
U3
K7
500
1.5m
10m
33nF
1k
V1N
33nF
1M
33pF
Y1
3.58MHz 33pF
PS2501-1
K8
+25 C
0.0
220V
–0.1
+85 C
–0.2
–0.3
–0.4
0.01
1k
V
DD
10k
10 F
100nF
S1
10nF
10nF
10nF
0.1
1
Amps
10
100
SCF
RESET
AGND DGND
NC = NO CONNECT
V
DD
Figure 10. Error as a % of Reading over Temperature with
an External Reference (Gain = 2)
Figure 13. Test Circuit for Performance Curves
–8–
REV. B
AD [ ANALOG DEVICES ]
