SL531 Datasheet | Gec Plessey

feature of the device is that the phase shift is nearly constant with signal level. Thus any phase information on the input signal is preserved through the strip. The device is also available as the 5962-92084 which has guaranteed operation over the full Military Temperature Range and is screened to MIL-STD-883 Class B. Data is available separately CM8 Fig.1 Pin connections FEATURES s s s Low Phase Shift vs Amplitude On-Chip Supply Decoupling Low External ponents Count APPLICATIONS s s s True Log Strips with:Log Range 70d B Centre frequencies 10 - 200MHz Phase Shift ± 0.5 degrees / 10d B Fig.2 Circuit diagram ABSOLUTE MAXIMUM RATINGS (Non-simultaneous) Supply voltage Storage temperature range Operating temperature range +12 volts -65°C to +150°C -55°C to +125°C See operating notes Max junction temperature 175°C Junction - ambient thermal resistance 220°C/Watt Junction - case thermal resistance 80°C/Watt CIRCUIT DESCRIPTION The SL531 transfer characteristic has two regions For small input signals it has a nominal gain of 10 d B. at large signals the gain falls to unity (see Fig 7) This is achieved by operating a limiting amplifier and a unity gain amplifier in parallel (see Fig 3) Tr1 and Tr4 prise the long tailed pair limiting amplifier, the tail current being supplied by Tr S, see Fig 2 Tr2 and Tr3 form the unity gain amplifier the gain of which is defined by the emitter resistors The outputs of both stages are summed in the 300 ohm resistor and Tr7 acts as an emitter follower output buffer. Important features are the amplitude and phase linearity of the unity gain stage which is achieved by the use of 5GHz transistors with carefully optimised geometries. Fig.3 Block diagram ORDERING INFORMATION 5962-92084 (SMD) SL531 C CM ELECTRICAL CHARACTERISTICS These characteristics are guaranteed over the following condltions (unless otherwise stated) Test circuit Fig (4) Frequency 60MHz Supply voltage 9 volts Ambient temperature 22±2°C Characteristic Small signal...