MMCCMB2107 Freescale, MMCCMB2107 Datasheet - Page 493

• Manufacturer Part Number: MMCCMB2107
• Manufacturer: Freescale

Specifications of MMCCMB2107

• Lead Free Status / RoHS Status: Not Compliant

MMC2107 – Rev. 2.0
MOTOROLA
PCB
NOTE:
Figure 18-50. Star-Ground at the Point of Power Supply Origin
+5 V
ANALOG POWER SUPPLY
This star-point scheme still requires adequate grounding for digital and
analog subsystems in addition to the star-point ground.
Other suggestions for PCB layout in which the QADC is employed
include:
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Freescale Semiconductor, Inc.
AGND
QADC
For More Information On This Product,
Queued Analog-to-Digital Converter (QADC)
Analog ground must be low impedance to all analog ground points
in the circuit.
Bypass capacitors should be as close to the power pins as
possible.
The analog ground should be isolated from the digital ground. This
can be done by cutting a separate ground plane for the analog
ground.
Non-minimum traces should be utilized for connecting bypass
capacitors and filters to their corresponding ground/power points.
Minimum distance for trace runs when possible.
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+5 V
V
V
SS
DD
Queued Analog-to-Digital Converter (QADC)
DIGITAL POWER SUPPLY
PGND
Pin Connection Considerations
+5 V
Technical Data
493