mm908e626 Freescale Semiconductor, Inc, mm908e626 Datasheet - Page 32

• Manufacturer Part Number: mm908e626
• Description: Integrated Stepper Motor Driver With Embedded Mcu And Lin Serial Communication
• Manufacturer: Freescale Semiconductor, Inc

recommendations to improve EMC/EMI performance.
Further generic design recommendations can be e.g. found
on the Freescale website www.freescale.com.
VSUP terminals (VSUP1:VSUP3)
decoupling capacitor close to the VSUP terminals to improve
EMC/EMI behaviour.
LIN terminal
Discharge) its recommended to place a high-quality ceramic
decoupling capacitor near the LIN terminal. An additional
varistor will further increase the immunity against ESD. A
ferrit in the LIN line will suppress some of the noise induced.
Voltage regulator output terminals (VDD and AGND)
stabilize the regulated voltage.
32
908E626
TYPICAL APPLICATIONS
FACTORY TRIMMING AND CALIBRATION
This paragraph gives some device specific
Its recommended to place a high-quality ceramic
For DPI (Direct Power Injection) and ESD (Electro Static
Use a high-quality ceramic decoupling capacitor to
V
LIN
SUP
V1
D1
L1
C1
Figure 17. EMC/EMI recommendations
+
EMC/EMI RECOMMENDATIONS
C2
C5
VSUP3
GND2
VSUP1
VSUP2
LIN
GND1
MCU digital supply terminals (EVDD and EVSS)
duration current demands on the power supply. To prevent
noise problems, take special care to provide power supply
bypassing at the MCU. It is recommended that a high-quality
ceramic decoupling capacitor be placed between these
terminals.
MCU analog supply terminals (VREFH, VDDA and
VREFL, VSSA)
to take special care on the layout. The MCU digital and
analog supplies should be tied to the same potential via
seperate traces and connected to the voltage regulator
output.
schematics and layout level and
recommended external components and layout
considerations.
MM908E625
Fast signal transitions on MCU terminals place high, short-
To avoid noise on the analog supply terminals its important
Figure 17
and
VREFH
VREFL
VDDA
EVDD
EVSS
VSSA
VDD
VSS
Figure 18
Analog Integrated Circuit Device Data
C3
show the recommendations on
C4
Table 8
Freescale Semiconductor
incidates