1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate...
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Transcript of 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate...
![Page 1: 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate conducted EMI –10MHz to 6GHz –-10dBm power level (100mVp)](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649ec55503460f94bd077c/html5/thumbnails/1.jpg)
1
INA826 EMI RR Testing
![Page 2: 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate conducted EMI –10MHz to 6GHz –-10dBm power level (100mVp)](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649ec55503460f94bd077c/html5/thumbnails/2.jpg)
2
Testing Methodology
• A sine wave applied to the input to simulate conducted EMI– 10MHz to 6GHz– -10dBm power level (100mVp)
• This conducted EMI signal will cause a change in the output offset of the part– DUT output is low-pass filtered– Change in offset is measured by a
6.5 digit DMM– Change in offset is input referred
Signal Generator
LPF
DMM
P
PEAKRF
V
OS
PEAKRFmV mV
V
A
V
VdBEMIRR
P 100log20log20)( __
100
![Page 3: 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate conducted EMI –10MHz to 6GHz –-10dBm power level (100mVp)](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649ec55503460f94bd077c/html5/thumbnails/3.jpg)
3
Test Configurations
Differential Measurement– Signal applied to non-
inverting input– Inverting input grounded
Common-Mode Measurement– Signal applied to both
inputs
Bipolar (+/-12V) supplies were used with the reference pin grounded
![Page 4: 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate conducted EMI –10MHz to 6GHz –-10dBm power level (100mVp)](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649ec55503460f94bd077c/html5/thumbnails/4.jpg)
4
Differential EMI RR of 3 Separate Units
The differential EMI RR performance is consistent across multiple INA826s
Differential EMI RR (Gain:1)
0
20
40
60
80
100
120
1.00E+07 1.00E+08 1.00E+09 1.00E+10
Frequency (Hz)
EM
I RR
(d
B)
INA826 #1
INA826 #2
INA826 #3
![Page 5: 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate conducted EMI –10MHz to 6GHz –-10dBm power level (100mVp)](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649ec55503460f94bd077c/html5/thumbnails/5.jpg)
5
INA826 Differential EMI RR Gain Dependency
Differential EMI RR improves above 1GHz with increasing gain
Differential EMI RR (input referred) vs. Gain
0
20
40
60
80
100
120
1.00E+07 1.00E+08 1.00E+09 1.00E+10Frequency (Hz)
EM
I R
R (
dB
)
INA826 #2 Gain: 1
INA826 #2 Gain:10
INA826 #2 Gain:100
![Page 6: 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate conducted EMI –10MHz to 6GHz –-10dBm power level (100mVp)](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649ec55503460f94bd077c/html5/thumbnails/6.jpg)
6
Common-Mode EMI RR of 3 Separate Units
Low frequency common-mode EMI RR performance has more unit-to-unit variation than differential EMI RR performance
Common-Mode EMI (1x Gain)
0
20
40
60
80
100
120
140
160
1.00E+07 1.00E+08 1.00E+09 1.00E+10
Frequency (Hz)
EM
I R
R (
dB
)
INA826 #2
INA826 #3
INA826 #4
![Page 7: 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate conducted EMI –10MHz to 6GHz –-10dBm power level (100mVp)](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649ec55503460f94bd077c/html5/thumbnails/7.jpg)
7
INA826 Common-Mode EMI RR Gain Dependency
Increasing gain generally improves CM EMI RR at high frequencies
Common-Mode EMI RR Gain Dependance
0
20
40
60
80
100
120
140
160
1.00E+07 1.00E+08 1.00E+09 1.00E+10
Frequency (Hz)
EM
I RR
(d
B)
INA826 #2 Gain 1
INA826 #2 Gain 10
INA826 #2 Gain 100
![Page 8: 1 INA826 EMI RR Testing. 2 Testing Methodology A sine wave applied to the input to simulate conducted EMI –10MHz to 6GHz –-10dBm power level (100mVp)](https://reader035.fdocuments.in/reader035/viewer/2022081516/56649ec55503460f94bd077c/html5/thumbnails/8.jpg)
8
Decoupling Capacitor Effects
Varying the decoupling capacitor size and type had negligible effect on EMI RR performance
Decoupling Capacitor Effects on Differential EMI RR
0
20
40
60
80
100
120
1.00E+07 1.00E+08 1.00E+09 1.00E+10Frequency (Hz)
EM
I RR
(d
B)
10uF X7R + 0.01uF C0G
10uF X7R + 0.1uF X7R
2x10uF X7R + 0.1uF X7R + 0.01uF C0G