SA5205 Просмотр технического описания (PDF) - Philips Electronics

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SA5205

Wide-band high-frequency amplifier

Philips Electronics 

Philips Semiconductors

Wide-band high-frequency amplifier

Product specification

SA5205A

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

VIN 2

GND 3

GND 4

20dB

8 VCC

7 VOUT

6 GND

5 GND

TOP VIEW

Figure 1. Pin Configuration

SR00215

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

8-Pin Plastic Small Outline (SO) package

TEMPERATURE RANGE

-40 to +85°C

ORDER CODE

SA5205AD

DWG #

SOT96-1

1997 Nov 07

2

853-1598 18662

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