Appendix b: error budget calculations, Important specs @ 25°c – B&B Electronics 4 Channel Input Buffer Board SDAIBB User Manual
Page 20
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SDAIBB3599 Manual
B-1
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
Appendix B: Error Budget Calculations
Important Specs @ 25°C:
V
offset in
( )
OSI
V
200
µ
V
V
offset out
(
)
OSO
V
1000
µ
V
I offset
( )
OS
I
2nA
Gain
Error
0.35%
Gain
Nonlinearity 50ppm
0.1Hz to 10Hz Noise
3.0
µ
V p-p
CMR
84dB
@
60
Hz
Error Contributions that can be Removed With
Calibration
V
in
is the input voltage.
Error Contributions that Cannot be Removed with
Calibration
Equation 15:
in
OSO
OSI
OS
V
G
V
V
V
+
=
Equation 16:
in
os
OS
V
I
I
×
=
Impedance
Sensor
Equation 17:
ppm
3500
Error
Gain
=
Equation 18:
in
CM
V
V
ppm
×
=
4
Error
CMR
Equation 19:
ppm
50
ty
Nonlineari
Gain
=
Equation 20:
in
V
nV
3000
noise
10Hz
-
0.1Hz
=
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