DAC7715UB1K BURR-BROWN [Burr-Brown Corporation], DAC7715UB1K Datasheet - Page 15

• Manufacturer Part Number: DAC7715UB1K
• Description: Quad, Serial Input, 12-Bit, Voltage Output DIGITAL-TO-ANALOG CONVERTER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

LAYOUT
A precision analog component requires careful layout, ad-
equate bypassing, and clean, well-regulated power supplies.
As the DAC7715 offers single-supply operation, it will often
be used in close proximity with digital logic, microcontrollers,
microprocessors, and digital signal processors. The more
digital logic present in the design and the higher the switch-
ing speed, the more difficult it will be to achieve good
performance from the converter.
Because the DAC7715 has a single ground pin, all return
currents, including digital and analog return currents, must
flow through the GND pin. Ideally, GND would be con-
nected directly to an analog ground plane. This plane would
15
be separate from the ground connection for the digital
components until they were connected at the power entry
point of the system.
The power applied to V
should be well regulated and low noise. Switching power
supplies and DC/DC converters will often have high-fre-
quency glitches or spikes riding on the output voltage. In
addition, digital components can create similar high-fre-
quency spikes as their internal logic switches states. This
noise can easily couple into the DAC output voltage through
various paths between the power connections and analog
output.
DD
(as well as V
DAC7715
SS
, if not grounded)
®