OQ2538HP NXP Semiconductors, OQ2538HP Datasheet - Page 8

• Manufacturer Part Number: OQ2538HP
• Manufacturer: NXP Semiconductors

Specifications of OQ2538HP

• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Supplier Unconfirmed

Philips Semiconductors
RF gain and group delay measurements
The measurement set-up shown in Fig.7 was used to
measure the single-ended small signal gain as specified in
Chapter “Characteristics”. Since the network analyzer can
only perform single-ended measurements, the
single-ended matching scheme described above is used
to match the inputs of the OQ2538HP to 50 . For greater
accuracy, the outputs are also matched. The gain
measured with this set-up is denoted by S
typical S
Figs 8 and 9. The OQ2538HP test PCB used for these
measurements can be supplied on request.
Although the differential voltage gain of the OQ2538HP
cannot be measured directly, it can be calculated from S
The differential voltage gain is 6 dB greater than the
measured S
100
differential voltage gain is increased by a further 2.4 dB,
typically to 48.4 dB. This is due to the fact that the output
load is increased from 25 to 33 , so the output voltage is
increased by a factor of 1.32 (2.4 dB).
1998 Oct 14
handbook, full pagewidth
SDH/SONET STM16/OC48 main amplifiers
termination
matching resistors on the output are omitted, the
50
21
SMA
and group delay characteristics are shown in
21
value, typically 46 dB (40 + 6 dB). If the
50
50
Z o = 50
semi rigid
semi rigid
100
Fig.7 S
21
21
6 GHz NETWORK ANALYZER
P = 50 dBm
. Graphs of
PORT 1
and group delay measurement set-up.
100
100 pF
100 pF
S-PARAMETER TEST SET
IN
INQ
21
V EE = 4.5 V
OQ2538HP
.
test PCB
8
When performing S
power level is around 50 dBm, as indicated in Fig.7
(port 1 of the network analyzer). For correct measurement
results the OQ2538 should not be limiting the input signal,
but operate in its linear region. This can be achieved by
using a very small input signal level of 50 dBm.
OUTQ
OUT
100
PORT 2
100
21
OQ2538HP; OQ2538U
measurements make sure the input
Z o = 50
50
50
semi rigid
semi rigid
Product specification
50
termination
MGM111
SMA