ES51998(60000counts)
DMM Analog front end/Insulation
2.2 Current measurement
MPU send write command to select the current measurement function. The Hz mode
measurement is available to be enabled with the ACA function (set AC bit to 1)
simultaneously. The measured signal is applied to IVSL/IVSH terminals (pin37-38).
See the next table of function command:
F3
0
F2
0
F1
1
F0
0
AC
0
Measurement mode
DCA mode
Read data bytes
D0(0:18), D1(0:9)
0
0
1
0
1
ACA mode
D0(0:18), D1(0:9)
D0(0:18), D1(0:9), D2(0:18), D3(0:18)
0
0
1
1
1
ACA + Hz(%) mode
Note1: D0/D1/D3 all are binary format. ASIGN/BSIGN are the sign bit of D0/D1, respectively.
Note2: See PEAK mode (section 2.10) also.
Range control for current mode (ACA/DCA)
Q2 Q1 Q0
Full Scale Range
300mV 60000counts
300mV 60000counts
Input terminal
IVSL
0
0
0
0
0
1
IVSH
Current measurement mode configuration examples: (max. voltage drop 300mV)
90K
600.00 / 6000.0uA
FUSE
1
60.000 / 600.00mA
V - V +
10K
uA / mA
49.5
2
3
-
100K
6
TL061
+
IVSL
IVSH
V -
V +
V -
0.495
100K
Zero Offset
FUSE
1. 5K
6A/ 20A
1
0.1uF
0.1uF
A
0.005
100K
1
COM
(max voltage drop = ~ 1V)
AGND
SGND
0.005
20A
6A
0.045
0.45
mA
4.5
mA
uA
uA
A
100K
100K
45
IVSH
IVSL
mA
uA
450
ver. 1.7
15
12/01/12
CYRUSTEK [ Cyrustek corporation ]
