Rainbow Electronics MAX5189 - Manual (Page 14)

MAX5186/MAX5189
Dual, 8-Bit, 40MHz, Current/Voltage,
Simultaneous-Output DACs
14 ______________________________________________________________________________________
bypass CREF1 and CREF2 with low-ESR 0.1µF capaci-
tors to AV
DD .
The power-supply voltages should also be decoupled
with large tantalum or electrolytic capacitors at the
point they enter the PC board. Ferrite beads with addi-
tional decoupling capacitors forming a pi network can
also improve performance.
Chip Information
TRANSISTOR COUNT: 9464
SUBSTRATE CONNECTED TO AGND
BP
FILTER
DAC2
CARRIER
FREQUENCY
MAX2452
IF
Q COMPONENT
BP
FILTER
+3V +3V
DIGITAL
SIGNAL
PROCESSOR
QUADRATURE
MODULATOR
I COMPONENT
0 °
90 °
Σ
+3V
MAX5186
MAX5189
DAC1
Figure 7. Using the MAX5186/MAX5189 for I/Q Signal Reconstruction