Figure 2. Default shunt positions.
Power Supply
The MAXREFDES74# board receives power from a single DC source of 15V to 20V,
300mA through a J1 power jack. The MAX13256, H-bridge driver and transformer
create an additional negative rail for +20V and -20V. The power is then rectified and
regulated down to a +15V and -15V supplies for the op amps, as well as into +5V
V
DD
and 3.3V V
DDIO
for V
REF
, ADC, and DAC. See the MAXREFDES74# schematic for
details. Specific voltages may be connected to the board for each rail, see
Table 4
for
corresponding shunt positions.
