max5351 Maxim Integrated Products, Inc., max5351 Datasheet - Page 14

• Manufacturer Part Number: max5351
• Description: Low-power, 13-bit Voltage-output Dacs With Serial Interface
• Manufacturer: Maxim Integrated Products, Inc.

Low-Power, 13-Bit Voltage-Output DACs
with Serial Interface
On power-up, the input and DAC registers are cleared
(set to zero code).
For rated MAX535/MAX5351 performance, REF should
be at least 1.4V below V
capacitor in parallel with a 0.1µF capacitor to GND.
Use short lead lengths and place the bypass capaci-
tors as close to the supply pins as possible.
Figure 10. Bipolar Output Circuit
Figure 12. Digitally Programmable Current Source
14
REF
______________________________________________________________________________________
DAC
MAX5351
MAX535
+3.3V
+5V/
GND
V
DD
DAC
REF
Power-Supply Considerations
R1
+5V/+3.3V
GND
V
DD
MAX5351
MAX535
DD
OUT
FB
. Bypass V
R1 = R2 = 10k ±0.1%
OUT
FB
+V
V-
DD
2N3904
V
R2
L
R
with a 4.7µF
I
OUT
V
OUT
Digital or AC transient signals on GND can create noise
at the analog output. Tie GND to the highest-quality
ground available.
Good printed circuit board ground layout minimizes
crosstalk between the DAC output, reference input, and
digital input. Reduce crosstalk by keeping analog lines
away from digital lines. Wire-wrapped boards are not
recommended.
Figure 11. AC Reference Input Circuit
REFERENCE
500mVp-p
+3.3V
INPUT
+5V/
AC
Grounding and Layout Considerations
26k
10k
+5V/+3.3V
DAC
REF
MAX495
MAX5351
MAX535
V
DD
GND
OUT