Rainbow Electronics MAX547 - Manual (Page 12)

MAX547
Octal, 13-Bit Voltage-Output
DAC with Parallel Interface
12 ______________________________________________________________________________________
Power-Supply Bypassing and
Ground Management
For optimum performance, use a multilayer PC board
with an unbroken analog ground. For normal opera-
tion, when all AGND_ pins are at the same potential,
connect the four AGND_ pins directly to the ground
plane or connect them together in a “star” configura-
tion. The center of this star point is a good location to
connect the digital system ground with the analog
ground.
If you are using a single common reference voltage,
you can connect the reference inputs together using a
“star” configuration. If you are using DC reference volt-
ages, bypass each reference input with a 0.1µF to 1µF
capacitor to AGND_.
MAX547
MAX494
+
-
REFAB
REFCD
REFEF
REFGH
Figure 6. Reference Buffering
MAX547AEQH -40°C to +85°C 44 PLCC
MAX547BEQH -40°C to +85°C 44 PLCC
MAX547AEMH -40°C to +85°C 44 Plastic FP
MAX547BEMH -40°C to +85°C 44 Plastic FP
±2
±4
±2
±4
PART TEMP. RANGE PIN-PACKAGE
INL
(LSBs)
_Ordering Information (continued)