Dear All,
One of my customer is working on oxygen analyser for which INA827 has been suggested. customer required gain is 30dB, but here it is varying from 26.5 to 28.2.
pls let us know how to improve linearity or else let me know is there any other part wherein they can get 30dB gain with same characteristics as that of INA827. kindly help to suggest. characteristics data are as below
Calculation:
Gain required: 30dB.
G = 5 +( 80K ohms/ Rgain)
Rgain = 3200 ohms.
Gain resistor fixed = 3.3K (tolerance +/- 1%)
Gain real : 29.24
|
S.No |
I/P voltage in mV |
O/P voltage in mV |
Gain in dB |
|
1 |
8 |
219 |
27.37 |
|
2 |
10 |
266 |
26.6 |
|
3 |
12 |
318 |
26.5 |
|
4 |
14 |
368 |
26.83 |
|
5 |
16 |
427 |
26.68 |
|
6 |
18 |
483 |
26.83 |
|
7 |
20 |
540 |
27 |
|
8 |
22 |
595 |
27.04 |
|
9 |
24 |
653 |
27.20 |
|
10 |
26 |
712 |
27.38 |
|
11 |
28 |
770 |
27.5 |
|
12 |
30 |
826 |
27.53 |
|
13 |
40 |
1113 |
27.82 |
|
14 |
50 |
1400 |
28 |
|
15 |
60 |
1690 |
28.16 |
Regards,
Aravind
