Applications Information
The MAX5223 is specified for single-supply operation
with V
DD
ranging from +2.7V to +5.5V, covering all
commonly used supply voltages in +3V and +5V sys-
tems.
Initialization
An internal POR circuit forces the outputs to zero scale
and initializes all internal registers to zero. Perform an
initial write operation to set the outputs to the desired
voltage at power-up.
Power-Supply and
Ground Management
GND should be connected to the highest quality
ground available. Bypass V
DD
with a 0.1µF to 0.22µF
capacitor to GND. The reference input can be used
without bypassing. For optimum line- and load-transient
response and noise performance, bypass the reference
input with 0.1µF to 4.7µF to GND. Careful PC board lay-
out minimizes crosstalk among DAC outputs, the refer-
ence, and digital inputs. Separate analog lines with
ground traces between them. Make sure that high-fre-
quency digital lines are not routed in parallel to analog
lines.
MAX5223
Low-Power, Dual, 8-Bit, Voltage Output
Serial DAC in 8-Pin SOT23
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