OQ2538HP_97 PHILIPS [NXP Semiconductors], OQ2538HP_97 Datasheet - Page 13

• Manufacturer Part Number: OQ2538HP_97
• Description: SDH/SONET main amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
Using alternative supply voltages
Although the OQ2538HP is intended to be used with a
single 4.5 V supply voltage, a slightly modified 5 V
supply can also be used. By connecting a Schottky diode
between the V
additional 0.5 V voltage drop is obtained, bringing the
supply voltage on the pins of the OQ2538HP within the
specified range. A BAS85 Schottky diode is
recommended. A 5 V application schematic is shown in
Fig.15.
Extrapolating from this case, a +5 V application is also
possible. However, care should be taken with the RF
transmission lines. The on-chip signals refer to the GND
pins, which become the positive supply pins in a +5 V
application. The external transmission lines will most likely
be referenced to system ground (V
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
Note
1.
THERMAL CHARACTERISTICS
1997 Nov 26
V
I
I
P
T
T
R
SYMBOL
SYMBOL
I
n
, I
V
j
stg
EE
tot
SDH/SONET main amplifier
th(j-s)
I
IQ
V
I
= V
IN
supply voltage
input voltage difference
input current
DC current
total power dissipation
junction temperature
storage temperature
thermal resistance from junction to solder point
EE
pins 30 and 32
pins 3, 18, 19 and 43
pin 21
pins 44 and 45
pin 22
V
INQ
power supply line and the IC, an
(AC only). The DC level is internally controlled.
PARAMETER
EE
pins). The RF signals
DESCRIPTION
note 1
CONDITIONS
13
will change from one reference plane to another at the
interface to the RF input and output pins. The positive
supply application is very vulnerable to interference at this
point. For a successful +5 V application, special care
should be taken when designing board layout to reduce
the influence of interference and keep the positive supply
as clean as possible.
ESD protection
Exceptions have been made to the standard ESD
protection scheme in order to achieve high frequency
performance. The inputs IN and INQ and the outputs OUT
and OUTQ have no protection against ESD.
All other pins have a standard ESD protection structure,
capable of withstanding 2 kV Human Body Model (HBM)
zappings.
6.0
600
2.0
6
3
2
1
0.1
65
MIN.
+0.5
+600
+2.0
+10
+3
+2
+1
+0.1
380
150
+150
VALUE
Preliminary specification
MAX.
48
OQ2538HP
V
mV
mA
mA
mA
mA
mA
mA
mW
C
C
UNIT
UNIT
K/W