TZA3019AHT Philips Semiconductors, TZA3019AHT Datasheet - Page 14

• Manufacturer Part Number: TZA3019AHT
• Description: 2.5 Gbits/s dual postamplifier with level detectors and 2 x 2 switch
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Supply current
For the supply currents I
Using a positive supply voltage
Although the TZA3019 has been designed to use a single
(see Fig.14) can also be used. However, care should be
taken with respect to RF transmission lines. The on-chip
signals refer to the various ground pins as being positive
supply pins in a +3.3 V application. The external
transmission lines will most likely be referred to the
pins V
ground. The RF signals will change from one reference
plane to another when interfacing the RF inputs and
outputs. A positive supply application is very vulnerable to
interference with respect to this point. For a successful
+3.3 V application, special care should be taken when
designing the PCB layout in order to reduce the influence
of interference and to keep the positive supply voltage as
clean as possible.
2000 Apr 10
handbook, halfpage
3.3 V supply voltage (see Fig.13), a +3.3 V supply
2.5 Gbits/s dual postamplifier with level
detectors and 2
V
CC
EE1A
V
a. Negative supply and negative logic.
, V
EE
TZA3019
< 7 V.
EE2A
, V
EE1B
5 k
EE1B
and V
and I
2 switch
LOS1,
LOS2
GND1A,
GND2A
handbook, halfpage
EE2B
Fig.11 Loss of signal outputs, pins LOS1 and LOS2.
EE2B
, being the system
MGS561
, see Fig.12.
c. Positive supply and positive logic.
56 k
I LOS
TZA3019
GND
V EE
5 k
14
handbook, halfpage
LOS1,
LOS2
GND1A,
GND2A
I EE1B,
I EE2B
(1) I
Fig.12 Supply current as a function of output
(mA)
GND
MGS563
EE1B
b. Negative supply and positive logic.
60
50
40
30
20
10
17
56 k
58
5
0
I LOS
and I
voltage
TZA3019
0
V CC
GND
EE2B
at 25 C.
0.2
5 k
LOS1,
LOS2
GND1A,
GND2A
0.5
V o(se)(p-p) (V)
Preliminary specification
MGS562
5.6 k
I LOS
TZA3019
0.8
V CC
V EE
(1)
MGS566
1