Philips Semiconductors

Product specification

SA5205A

Wide-band high-frequency amplifier

2

1997 Nov 07

853-1598 18662

DESCRIPTION

The SA5205A family of wideband amplifiers replace the SA5205

family. The ‘A’ parts are fabricated on a rugged 2

µm 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 75

Ω system

and 6dB in a 50

Ω 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 75

Ω input and output impedances.

The Standing Wave Ratios in 50 and 75

Ω 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 75

Ω. 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 75

Ω 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 50

Ω test equipment such as signal

generators, oscilloscopes, frequency counters and all kinds of signal

analyzers. Other applications at 50

Ω 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

8

7

6

5

4

3

2

1

VCC

VIN

GND

GND

VCC

VOUT

GND

GND

D Packages

TOP VIEW

20dB

SR00215

Figure 1. Pin Configuration

FEATURES

APPLICATIONS

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

8-Pin Plastic Small Outline (SO) package

-40 to +85

°C

SA5205AD

SOT96-1