FDI2056 Use
r’s Manual
v 2.0 r 1.1
– 03/13
Copyright © 2013 Metrolab Technology SA
76
www.metrolab.com
9
20.0
10
40.0
11
50.0
12
100.0
13 to 15
0.1
Any other value could result in a gain change and should be avoided.
Signal path and voltage reference configuration (BAR3 : 0x105)
Bit 6
Override gain linking
By default, the voltage reference is automatically set according to the value specified
in the Gain Configuration Register, i.e. the voltage reference is linked to the gain.
However, you may force the system to use the value written in this register by forcing
th
is bit to ‘1’. This way, you may take control over the voltage fed to the input resistor
ladder.
Please note that this voltage is applied to the positive input of the resistor ladder and
the same voltage, but negative, is applied to the negative input of the said resistor
ladder.
Bit 5..2
Voltage reference value
0000 : 12.5
[Volts]
0001 : 12.5
[Volts]
0010 : 10.0
[Volts]
0011 : 10.0
[Volts]
0100 : 5.0
[Volts]
0101 : 2.5
[Volts]
0110 : 1.25 [Volts]
0111 : 1.0
[Volts]
1000 : 0.5
[Volts]
1001 : 0.25 [Volts]
1010 : 0.125 [Volts]
1011 : 0.1
[Volts]
1100 : 0.05 [Volts]
Bit 1..0
Select the signal that is fed to the input
00 : Direct coil connection
01 : Input is short-circuited
10 : Voltage reference
11 : Voltage reference