4 Channel Input Buffer Board Product Manual

SDAIBB3599 Manual B-1
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax [phone]
Appendix B: Error Budget Calculations
Important Specs @ 25°C:
V
offset in
()
OSI
V 200 µV
V
offset out
()
OSO
V 1000 µV
I offset
()
OS
I 2nA
Gain Error 0.35%
Gain Nonlinearity 50ppm
0.1Hz to 10Hz Noise 3.0µV 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
×
=
ImpedanceSensor
Equation 17:
ppm3500ErrorGain =
Equation 18:
in
CM
V
Vppm
×
=
4
Error CMR
Equation 19:
ppm50tyNonlineariGain
=
Equation 20:
in
V
nV3000
noise 10Hz - 0.1Hz
=