B&B Electronics 4 Channel Input Buffer Board SDAIBB - Manual (Page 20)

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
=