tp3069wm National Semiconductor Corporation, tp3069wm Datasheet - Page 13
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tp3069wm
Manufacturer Part Number
tp3069wm
Description
``enhanced Serial Interface Cmos Codec/filter Combo
Manufacturer
National Semiconductor Corporation
Datasheet
1.TP3069WM.pdf
(18 pages)
Applications Information
POWER SUPPLIES
While the pins of the TP3060 family are well protected
against electrical misuse it is recommended that the stan-
dard CMOS practice be followed ensuring that ground is
connected to the device before any other connections are
made In applications where the printed circuit board may be
plugged into a ‘‘hot’’ socket with power and clocks already
present an extra long ground pin in the connector should
be used
All ground connections to each device should meet at a
common point as close as possible to the GNDA pin This
Typical Asynchronous Application
Note 1 Transmit gain
Note 2 Receive gain
e
e
20
20
FIGURE 4
c
c
log
log
13
2
R1
minimizes the interaction of ground return currents flowing
through a common bus impedance 0 1 mF supply decou-
pling capacitors should be connected from this common
ground point to V
possible
For best performance the ground point of each CODEC
FILTER on a card should be connected to a common card
ground in ‘‘STAR’’ formation rather than via a ground bus
This common ground point should be decoupled to V
V
Note See Application Note 370 for further details
c
R4
R2
BB
a
R3
R2
J
with 10 mF capacitors
J
R4
(R1
t
10 kX
a
R2)
t
CC
10 kX
and V
TL H 10578 – 6
BB
as close to the device as
CC
and