INTEGRATED CIRCUITS
SA5205A
Wide-band high-frequency amplifier
Product specification
1997 Nov 07
Replaces data of February 24, 1992 IC17 Data Handbook
Philips Semiconductors
Philips Semiconductors |
Product specification |
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Wide-band high-frequency amplifier |
SA5205A |
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DESCRIPTION
The SA5205A family of wideband amplifiers replace the SA5205 family. The `A' parts are fabricated on a rugged 2μm bipolar process featuring excellent statistical process control. Electrical performance is nominally identical to the original parts.
The SA5205A is a high-frequency amplifier with a fixed insertion gain of 20dB. The SA5205A operates with a single supply of 6V, and only draws 24mA 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.
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 SA5205A solves these problems by incorporating a wide-band 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 from DC to the -3dB bandwidth limit.
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 SA5205A 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 device is ideally suited for 75Ω cable television applications such as decoder boxes, satellite receiver/decoders, and front-end amplifiers for TV receivers. It is also useful for amplified splitters and antenna amplifiers.
The part is matched well 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 broad-band
LANs and telecom systems. A gain greater than 20dB can be achieved by cascading additional SA5205As in series as required, without any degradation in amplifier stability.
PIN CONFIGURATIONS
D Packages
VCC |
1 |
8 |
VCC |
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20dB |
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VIN |
2 |
7 |
VOUT |
GND |
3 |
6 |
GND |
GND |
4 |
5 |
GND |
TOP VIEW
SR00215
Figure 1. Pin Configuration
FEATURES
•600MHz bandwidth
•20dB insertion gain
•4.8dB (6dB) noise figure ZO=75Ω (ZO=50Ω)
•No external components required
•Input and output impedances matched to 50/75Ω systems
•2000V ESD protection
APPLICATIONS
•75Ω cable TV decoder boxes
•Antenna amplifiers
•Amplified splitters
•Signal generators
•Frequency counters
•Oscilloscopes
•Signal analyzers
•Broad-band LANs
•Fiber-optics
•Modems
•Mobile radio
•Security systems
•Telecommunications
ORDERING INFORMATION
DESCRIPTION |
TEMPERATURE RANGE |
ORDER CODE |
DWG # |
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8-Pin Plastic Small Outline (SO) package |
-40 to +85°C |
SA5205AD |
SOT96-1 |
1997 Nov 07 |
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853-1598 18662 |
Philips Semiconductors |
Product specification |
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Wide-band high-frequency amplifier |
SA5205A |
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EQUIVALENT SCHEMATIC
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VCC |
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R1 |
R2 |
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Q3 |
VOUT |
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Q6 |
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Q2 |
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R3 |
VIN |
Q1 |
Q4 |
RE2 |
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RF1 |
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RE1 |
Q5 |
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RF2 |
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SR00216
Figure 2. Equivalent Schematic
ABSOLUTE MAXIMUM RATINGS
SYMBOL |
PARAMETER |
RATING |
UNIT |
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VCC |
Supply voltage |
9 |
V |
VAC |
AC input voltage |
5 |
VP-P |
TA |
Operating ambient temperature range |
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SA grade |
-40 to +85 |
°C |
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PDMAX |
Maximum power dissipation, |
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T =25°C (still-air)1, 2 |
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A |
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D package |
780 |
mW |
NOTES:
1.Derate above 25°C, at the following rates:
D package at 6.2mW/°C
2.See ªPower Dissipation Considerationsº section.
1997 Nov 07 |
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Philips Semiconductors |
Product specification |
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Wide-band high-frequency amplifier |
SA5205A |
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DC ELECTRICAL CHARACTERISTICS
VCC=6V, ZS=ZL=ZO=50Ω and TA=25°C in all packages, unless otherwise specified.
SYMBOL |
PARAMETER |
TEST CONDITIONS |
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SA5205A |
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UNIT |
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Min |
Typ |
Max |
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VCC |
Operating supply voltage range |
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5 |
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8 |
V |
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Over temperature |
5 |
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8 |
V |
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ICC |
Supply current |
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20 |
25 |
32 |
mA |
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Over temperature |
19 |
25 |
33 |
mA |
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S21 |
Insertion gain |
f=100MHz |
17 |
19 |
21 |
dB |
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Over temperature |
16.5 |
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21.5 |
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S11 |
Input return loss |
f=100MHz |
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25 |
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dB |
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DC - fMAX |
12 |
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S22 |
Output return loss |
f=100MHz |
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27 |
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dB |
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DC - fMAX |
12 |
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S12 |
Isolation |
f=100MHz |
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-25 |
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dB |
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DC - fMAX |
-18 |
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tR |
Rise time |
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500 |
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ps |
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tP |
Propagation delay |
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500 |
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ps |
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BW |
Bandwidth |
±0.5dB |
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450 |
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MHz |
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fMAX |
Bandwidth |
-3dB |
550 |
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MHz |
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Noise figure (75Ω) |
f=100MHz |
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4.8 |
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dB |
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Noise figure (50Ω) |
f=100MHz |
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6.0 |
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dB |
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Saturated output power |
f=100MHz |
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+7.0 |
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dBm |
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1dB gain compression |
f=100MHz |
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+4.0 |
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dBm |
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Third-order intermodulation |
f=100MHz |
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+17 |
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dBm |
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intercept (output) |
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Second-order intermodulation |
f=100MHz |
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+24 |
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dBm |
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intercept (output) |
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1997 Nov 07 |
4 |
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