NCN49599_15 Datasheet, PDF (33/35 Pages) ON Semiconductor – Power Line Communication Modem

NCN49599
POWER
ÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌÌ##$%&’’ÌÌÌÌÌ##$%&’’Ì _{ÌÌÌÌÌÕÕŠÚÛÜÌÌÌÌÌÕÕŠÚÛÜÌÌÌÌÌÌÌÌÌÌÑÑÓÔÖÒÌÌÌÑÑÖÒÌÌÌÌÌ GROUND}
C21
C11
12V SUPPLY
ANALOG
GROUND
C20
3,3V SUPPLY
VEE
VCC
REF_OUT VSSA
VDDA
3,3V SUPPLY
1
Ì₂
Ì VEE 3
4
Ì_C19
VDD ⁵
6
ÌÌÌÌÌ₇
ÌÌÌÌÌ VSS
8
42
41
40 NC
39
38
37
36
35
9
34
10
33
11
32
12
31
13
30
14
29
PC20120831.1
ÌÌ _VDD1V8
VDD
ÌÌ"ÌÌÙÌÙÌÌ _C15
C18
ÌÌ!!ÌÌÙŸŽ¦¦ÌÌÙ¦¦ _VSS
3,3V SUPPLY
Figure 40. Recommended layout of the placement of decoupling capacitors (bottom ground plane not shown)
Internal Voltage Reference
REF_OUT is the analogue output pin which provides the
voltage reference used by the A/D converter. This pin must
be decoupled to the analogue ground by a 1 mF ceramic
capacitance C_DREF. The connection path of this capacitor to
the V_SSA on the PCB should be kept as short as possible in
order to minimize the serial inductance.
Internal Voltage Regulator
An internal linear regulator provides the 1.8 V core
voltage for the microcontroller. This voltage is connected to
pin VDD1V8. A ceramic decoupling capacitor of 1 mF to
ground must be connected as close as possible to this pin
(Figure 40).
The internal regulator should not be used to power other
components.
Exposed Thermal Pad
The line driver output amplifier in the NCN49599 is
capable of delivering 1.5 A into a complex load.
Output signal swing should be kept as high as possible.
This will minimize internal heat generation, reducing the
internal junction temperature. The line driver in the
NCN49599 can swing to within 1 V of either rail without
adding distortion.
An exposed thermal pad is provided on the bottom of the
device to facilitate heat dissipation. The printed circuit
board and soldering process must be carefully designed to
minimize the thermal resistance between the exposed pad
and the ambient. Refer to [1,8] for more information.
Table 28. DEVICE ORDERING INFORMATION
Part Number
Temperature Range
Package Type
Shipping^†
NCN49599MNG
−40°C – 125°C
QFN−56
Tube
NCN49599MNRG
−40°C – 125°C
QFN−56
Tape & Reel
†For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging
Specifications Brochure, BRD8011/D.
www.onsemi.com
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