Z-World Wolf BL2600, Руководство пользователя

Страница: 32 / 106

28 Wolf (BL2600)
3.6 Analog Reference Voltage Circuit
Figure 18 shows the analog voltage reference circuit.
Figure 18. Analog Reference Voltages
The A/D converter chip supplies the 2.048 V reference voltage, which is divided in half
and then amplified and buffered to provide the 1.667 V and 2.5 V reference voltages used
by the digital output circuits.
The D/A converter chip provides the reference voltages for the digital inputs to provide
single-ended unipolar or differential measurements [0 V], or to provide single-ended
bipolar measurements [V = (voltage range) ÷ 9]. Because the D/A converter chip operation
is configured by the
anaOutConfig
function, it is important to run the
anaOutConfig
function before running
anaInConfig
if you plan to use the digital outputs to ensure that
the reference voltages are established first before the analog inputs are configured.
15.8 k W
11 k W
10 k W
ADREF
100 nF
2.048 V
1.024 V
10 k W
15.8 k W
2.500 V
1.667 V
10 k W