PS13201

Data Sheet 210892 issue 3

Plessey Semiconductors Ltd.

Design & Technology Centre, Delta 500, Delta Business Park, Great Western Way, Swindon, UK SN5 7XE

Tel: +44 1793 518000

Fax: +44 1793 518030

4

The PS13201 CANNOT be GUARANTEED to operate below 100MHz and meet the electrical characteristics shown

above. However, characterisation has shown that the device can still function adequately down to frequencies of 50MHz,

with the following reservations:-

1.

The video bandwidth is fixed to approx 40MHz a certain amount of carrier breakthrough on the video O/P

(pin 13) will occur, with input signal frequencies below 100MHz.

2.

There are 2 RF coupling capacitors (20pF) on-chip, which couple the output signal from stage 3 to the

input of stage 4 (ref Fig. 24). These can introduce undesirable limiting phase performance for input signal

frequencies below 100MHz.

PRODUCT DESCRIPTION

The PS13201 is a complete monolithic successive detection Log/limiting amplifier which can operate over an input

frequency range of 100MHz to 500MHz. Producing a log/lin characteristic for input signals between -64dBm and

+6dBm, the log amplifier can provide an accuracy of better than ±1.00dB at case temperatures of -55°C and

+25°C and an accuracy of better than ±1.25dB at +125°C. The dynamic range is better than 75dB over a

frequency range of 100MHz to 400MHz. The graph in fig 4 shows how the dynamic range is guaranteed over

frequency.