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Table 38: Factory settings of the system register and the channel register
DAC Register
System register
Channel register 0
Channel register 1
Channel register 2
Channel register 3
Channel register 4
Channel register 5
Channel register 6
Channel register 7
The output voltage is determined by the following equation:
=
Vout
Vout: the desired output voltage,
Vbias: the reference voltage (V
NA: the decimal value for the main register,
NB: the decimal value for the sub-register.
If NB is set to NB = 128 NA can be determined from Vout as follows:
The storage addresses for the individual register values in the EEPROM are available in
the appendix A. Power up values and extended operating mode values are not the same.
With Photonfocus' software library the voltage values corresponding to the individual
operating modes can be stored in the EEPROM after fine tuning.
REV: 1.0
HEX Code
Description
0060
Coding method, binary with offset
4210
Active output, external reference Vref = 1.25V
4610
Active output, external reference Vref = 1.25V
4A10
Active output, external reference Vref = 1.25V
4E10
Active output, external reference Vref = 1.25V
5210
Active output, external reference Vref = 1.25V
5610
Active output, external reference Vref = 1.25V
5A10
Active output, external reference Vref = 1.25V
5E10
Active output, external reference Vref = 1.25V
+
Vbias
*
1 (
. 1
875
( *
NA
/2, internal V
DD
−
Vout
Vbias
=
NA
. 1
875
*
Vbias
MV-D752-28 User's Manual
−
+
−
512
/ )
1024
(
NB
= 1.23 V or external V
REF
+
*
1024
512
.
128
/ )
4096
)
,
= 1.25 V),
Ref
Page 50/61
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