Philips Semiconductors
Product specification
Wide-band high-frequency amplifier
SA5204A
DESCRIPTION
The SA5204A family of wideband amplifiers replaces the SA5204
family. The ‘A’ parts are fabricated on a rugged 2µm bipolar process
featuring excellent statistical process control. Electrical
performance is nomically identical to the original parts.
The SA5204A is a high-frequency amplifier with a fixed insertion
gain of 20dB. The gain is flat to
±0.5dB
from DC to 200MHz. The
-3dB bandwidth is greater than 350MHz. This performance makes
the amplifier ideal for cable TV applications. The SA5204A operates
with a single supply of 6V, and only draws 25mA of supply current,
which is much less than comparable hybrid parts. The noise figure is
4.8dB in a 75Ω system and 6dB in a 50Ω system.
The SA5204A is a relaxed version of the SA5205. Minimum
guaranteed bandwidth is relaxed to 350MHz and the “S” parameter
Min/Max limits are specified as typicals only.
Until now, most RF or high-frequency designers had to settle for
discrete or hybrid solutions to their amplification problems. Most of
these solutions required trade-offs that the designer had to accept in
order to use high-frequency gain stages. These include high power
consumption, large component count, transformers, large packages
with heat sinks, and high part cost. The SA5204A solves these
problems by incorporating a wideband amplifier on a single
monolithic chip.
The part is well matched to 50 or 75Ω input and output impedances.
The standing wave ratios in 50 and 75Ω systems do not exceed 1.5
on either the input or output over the entire DC to 350MHz operating
range.
Since the part is a small, monolithic IC die, problems such as stray
capacitance are minimized. The die size is small enough to fit into a
very cost-effective 8-pin small-outline (SO) package to further
reduce parasitic effects.
No external components are needed other than AC-coupling
capacitors because the SA5204A is internally compensated and
matched to 50 and 75Ω. The amplifier has very good distortion
specifications, with second and third-order intermodulation
intercepts of +24dBm and +17dBm, respectively, at 100MHz.
The part is well matched for 50Ω test equipment such as signal
generators, oscilloscopes, frequency counters, and all kinds of
signal analyzers. Other applications at 50Ω include mobile radio, CB
radio, and data/video transmission in fiber optics, as well as
broadband LANs and telecom systems. A gain greater than 20dB
can be achieved by cascading additional SA5204As in series as
required, without any degradation in amplifier stability.
PIN CONFIGURATION
D Packages
V
CC
V
IN
GND
GND
1
20dB
2
3
4
TOP VIEW
8
7
6
5
V
CC
V
OUT
GND
GND
SR00193
Figure 1. Pin Configuration
FEATURES
•
Bandwidth (min.)
200 MHz,
±0.5dB
350 MHz, -3dB
•
20dB insertion gain
•
4.8dB (6dB) noise figure Z
O
=75Ω (Z
O
=50Ω)
•
No external components required
•
Input and output impedances matched to 50/75Ω systems
•
Surface-mount package available
•
Cascadable
•
2000V ESD protection
APPLICATIONS
•
Antenna amplifiers
•
Amplified splitters
•
Signal generators
•
Frequency counters
•
Oscilloscopes
•
Signal analyzers
•
Broadband LANs
•
Networks
•
Modems
•
Mobile radio
•
Security systems
•
Telecommunications
ORDERING INFORMATION
DESCRIPTION
8-Pin Plastic Small Outline (SO) package
TEMPERATURE RANGE
–40 to +85°C
ORDER CODE
SA5204AD
DWG #
SOT96-1
2
853-1599 18662
Philips Semiconductors
Product specification
Wide-band high-frequency amplifier
SA5204A
DC ELECTRICAL CHARACTERISTICS
V
CC
=6V, Z
S
=Z
L
=Z
O
=50Ω and T
A
=25°C, in all packages, unless otherwise specified.
SYMBOL
V
CC
I
CC
S21
S11
S22
S12
BW
BW
PARAMETER
Operating supply voltage range
Supply current
Insertion gain
Input return loss
Output return loss
Isolation
Bandwidth
Bandwidth
Noise figure (75Ω)
Noise figure (50Ω)
Saturated output power
1dB gain compression
Third–order intermodulation inter-
cept (output)
Second–order intermodulation inter-
cept (output)
t
R
t
P
Rise time
Propagation delay
TEST CONDITIONS
Over temperature
Over temperature
f=100MHz, over temperature
f=100MHz
DC –550MHz
f=100MHz
DC –550MHz
f=100MHz
DC –550MHz
±0.5dB
–3dB
f=100MHz
f=100MHz
f=100MHz
f=100MHz
f=100MHz
f=100MHz
200
350
LIMITS
Min
5
19
16
25
19
25
12
27
12
–25
–18
350
550
4.8
6.0
+7.0
+4.0
+17
+24
500
500
Typ
Max
8
33
22
UNIT
V
mA
dB
dB
dB
dB
MHz
MHz
dB
dB
dBm
dBm
dBm
dBm
ps
ps
35
34
SUPPLY CURRENT—mA
NOISE FIGURE—dBm
32
30
28
26
24
22
20
18
16
5
5.5
6
6.5
7
7.5
8
SUPPLY VOLTAGE—V
T
A
= 25
o
C
9
8
v
cc
= 8v
v
cc
= 7v
v
cc
= 6v
v
cc
= 5v
Z
O
= 50Ω
T
A
= 25
o
C
7
6
5
10
1
2
4
6
8
10
2
2
4
6
8
10
3
SR00196
SR00195
FREQUENCY—MHz
Figure 3. Supply Current vs Supply Voltage
Figure 4. Noise Figure vs Frequency
1997 Nov 07
4
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