AD5554 Analog Devices, AD5554 Datasheet - Page 18

• Manufacturer Part Number: AD5554
• Description: Quad, Current-Output, Serial-Input 16-/14-Bit DACs
• Manufacturer: Analog Devices

Specifications of AD5554

• Resolution (bits): 14bit
• Dac Update Rate: 500kSPS
• Dac Settling Time: 0.9µs
• Max Pos Supply (v): +5.5V
• Single-supply: Yes
• Dac Type: Current Out
• Dac Input Format: Ser,SPI

AD5544/AD5554
LAYOUT AND POWER SUPPLY BYPASSING
It is good practice to employ a compact, minimum lead length
layout design. The leads to the input should be as direct as possible
with a minimum conductor length. Ground paths should have
low resistance and low inductance.
Similarly, it is good practice to bypass the power supplies with
quality capacitors for optimum stability. Supply leads to the device
should be bypassed with 0.01 µF to 0.1 µF disc or chip ceramic
capacitors. Low ESR 1 µF to 10 µF tantalum or electrolytic capaci-
tors should also be applied at V
disturbance and filter any low frequency ripple (see Figure 26).
Users should not apply switching regulators for V
power supply rejection ratio (PSRR) degradation over frequency.
DD
to minimize any transient
DD
due to the
Rev. F | Page 18 of 28
GROUNDING
The DGND and A
digital and analog ground references. To minimize the digital
ground bounce, the DGND terminal should be joined remotely
at a single point to the analog ground plane (see Figure 26).
Figure 26. Power Supply Bypassing and Grounding Connection
V
V
DD
SS
10µF
10µF
GND
C3
C4
x pins of the
+
0.1µF
0.1µF
C1
C2
AD5544/AD5554
AD5544/AD5554
V
A
V
DD
SS
GND
X
DGND
Data Sheet
serve as