D/A Converter Outputs - Z-World Wolf BL2600 User Manual

3.5 D/A Converter Outputs

The four D/A converter outputs are buffered and scaled to provide an output from 0 V to
+10 V (12-bit resolution) or ±10 V (11-bit resolution, one bit used for polarity). There are
also four 4–20 mA current outputs. Figure 17 shows the D/A converter outputs.
DAC
1.667 V ref.
2.5 V ref.
To stay within the maximum power dissipation of the D/A converter circuit, the maximum
D/A converter output current is 10 mA per channel for the voltage outputs. If you are
using the current outputs, keep the resistance driven by a current output channel below
400 Ω to stay within the power dissipation capabilities of the D/A converter circuit.
As Figure 17 shows, both the voltage and the current outputs for a particular channel are
driven by the same output on the D/A converter chip. As a result, either the
or the
anaOutmAmps
sponding to a particular channel. For example, if
AV0 to be +10 V, AI0 will be 20 mA; if
+5 V, AI0 will be 12 mA, the midpoint of the 4–20 mA range. It is possible to connect a
load to both the corresponding voltage and current outputs as long as the combined current
consumption does not exceed the 20 mA individual limit.
Because of the "connection" between the analog voltage outputs and the analog current
outputs, the configuration of the analog voltage outputs with the
call as unipolar outputs with 12-bit resolution or as bipolar outputs with 11-bit resolution
26
52.3 kW
10 kW
11 kW
1.33 kW 11 kW
1.33 kW 11 kW
Figure 17. D/A Converter Outputs
function calls will set both the voltage and the current outputs corre-
anaOutVolts
AV0
AV1
AI0
AI1
AGND
sets unipolar channel
anaOutVolts
sets unipolar channel AV0 to be
anaOutConfig
anaOutVolts
function
Wolf (BL2600)