AD5321 Analog Devices, AD5321 Datasheet - Page 19

• Manufacturer Part Number: AD5321
• Description: 2.5 V to 5.5 V, 120 µA, 2-Wire Interface, Voltage-Output 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of AD5321

• Resolution (bits): 12bit
• Dac Update Rate: 125kSPS
• Dac Settling Time: 8µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Voltage Out
• Dac Input Format: I2C/Ser 2-wire,Ser

POWER SUPPLY DECOUPLING
In any circuit where accuracy is important, careful considera-
tion of the power supply and ground return layout helps to
ensure the rated performance. The AD5301/AD5311/AD5321
should be decoupled to GND with 10 μF in parallel with a
0.1 μF capacitor, located as close to the package as possible.
The 10 μF capacitor should be the tantalum bead type, while
MASTER
A1
A0
SDA
AD5301
V
OUT
SCL
R
P
Figure 38. Multiple AD5301 Devices on One Bus
V
DD
R
P
5V
A1
A0
SDA
AD5301
Rev. B | Page 19 of 24
V
OUT
SCL
V
DD
a ceramic 0.1 μF capacitor provides a sufficient low impedance
path to ground at high frequencies. The power supply lines of
the AD5301/AD5311/AD5321 should use as large a trace as
possible to provide low impedance paths. A ground line routed
between the SDA and SCL lines helps reduce crosstalk between
them. This is not required on a multilayer board as there is a
ground plane layer, but separating the lines helps.
A1
A0
SDA
AD5301
V
OUT
SCL
V
DD
AD5301/AD5311/AD5321
SDA
A1
A0
AD5301
V
OUT
SCL
SDA
SCL