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SL3522
500MHz 75dB Logarithmic/Limiting Amplifier Advance Information
Supersedes edition in Professional Products IC Handbook May 1991 DS3534 - 2.0 April 1994
The SL3522 is a monolithic seven stage successive detection logarithmic amplifier integrated circuit for use in the 100MHz to 500MHz frequency range. It features an on–chip video amplifier with provision for external adjustment of log Slope and offset. It also features a balanced RF output. The SL3522 operates from supplies of ±5V.
N/C N/C VEE GND VEE GND VEE RF O/P GND RF O/P– RF O/P+ RF O/P VEE VIDEO O/P VEE VIDEO O/P VIDEO O/P VCC
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
RF I/P+ RF I/P– VEE GND VEE GND VEE GND VIDEO VEE GAIN ADJUST TRIM REF OFFSET ADJ VIDEO GND VIDEO VCC
FEATURES s 75dB Dynamic Range s Surface Mount SO Package s Adjustable Log Slope and Offset s 0dBm RF Limiting Output s 60dBm Limiting Range s 2V Video Output Range s Low Power (Typ. 1W) s Temperature Range (TCASE): -55°C to +125°C APPLICATIONS s Ultra Wideband Log Receivers s Channelised and Monpulse Radar s Instrumentation ABSOLUTE MAXIMUM RATINGS
Supply Voltage Storage temperature Junction temperature Thermal resistance Die-to-case Die-to-ambient Applied DC voltage to RF input Applied RF power to RF input
MC28
Fig.1 Pin connections - top view
ORDERING INFORMATION
SL3522 A MC (Miniature Ceramic package) SL3522 C MC (Miniature Ceramic package) SL3522 NA 1C (Probe-tested bare die) (Also available: SL3522 AA MC screened to Zarlink HI-REL level A. Contact Zarlink Semiconductor sales outlet for a separate datasheet.) ±6.0V -65°C to +175°C +175°C 15.5°C/W 76.5°C/W ±400mV +15dBm ESD PROTECTION To achieve the high frequency performance there are no ESD protection structures on the RF input pins (27, 28). These pins are highly static sensitive, typically measured as 250V using MIL-STD-883 method 3015. Therefore, ESD handling precautions are essential to avoid degradation of performance or permanent damage to this device.
RF O/P RF O/P– O/P+ VCC
RF I/P – RF I/P +
27
9
10
14 O/P GND VIDEO OUT O/P VEE VIDEO VCC
28
16 13 12
VIDEO GAIN AND OFFSET ADJUST
15
19 3, 5, 7, 20, 22, 24, 26 VEE 4, 6, 8, 21, 23, 25 GND GAIN ADJ
18 RG
17 RT RO OFFSET ADJ
Fig.2 Functional block diagram
SL3522
ELECTRICAL CHARACTERISTICS
The electrical characteristics are guaranteed over the following range of operating conditions, using test circuit in Fig. 3 (unless otherwise stated): Temperature range: Military: SL3522 A MC, SL3522 NA 1C Commercial: SL3522 C MC Supply voltage: VCC: +4.50V to +5.50V (all grades) VEE: -4.5V to -5.50V (all grades) Frequency =100MHz to 500MHz Rg, Ro, Rt =1.5KΩ Video output load =200Ω//20pF Test conditions (unless otherwise stated): Temperature: SL3522 A MC: +25°C, +125°C & -55°C (TCASE) SL3522 C MC: +25°C SL3522 NA 1C +25°C Supply voltage: VCC = +5.0V, VEE = -5.0V Parameter Positive supply current (quiescent) Negative supply current (quiescent) Dynamic ra.