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SL2035 Datasheet(PDF) 1 Page - Mitel Networks Corporation |
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SL2035 Datasheet(HTML) 1 Page - Mitel Networks Corporation |
1 / 6 page DS5117 Issue 2.1 October 1999 SL2035 High Performance Broadband Downconverter Preliminary Information Ordering Information SL2035/IG/MP1S (Tubes) SL2035/IG/MP1T (Tape and Reel) Features G Single Chip Broadband Solution G Wide Dynamic Range RF Input G Low Phase Noise Balanced Internal Local Oscillator G High Frequency Range: 1 to 1·3 GHz G ESD Protection 2kV min., MIL-STD-883B Method 3015 Cat.1 (Normal ESD handling procedures should be observed) Applications G Double Conversion Tuners G Digital Terrestrial Tuners G Data Transmit Systems G Data Communications Systems The SL2035 is a bipolar, broadband wide dynamic range mixer oscillator, optimised for applications as the downconverter in double conversion tuner systems. It also has application in any system where a wide dynamic range broadband frequency converter is required. The SL2035 is a single chip containing all necessary active circuitry and simply requires an external tuneable resonant network for the local oscillator. The block diagram is shown in Figure 1 and pin connections are shown in Figure 2. In normal application the signal from the high IF output is connected to the RFIN and RFIN inputs. The RF input preamplifier of the device is designed for low noise figure within the operating region and for high intermodulation distortion intercept so offering good signal to noise plus composite distortion spurious performance. The preamplifier also provides gain to the mixer section and back isolation from the local oscillator section. The approximate model of the RF input is shown in Figure 3. Absolute Maximum Ratings Supply voltage, VCC RF differential input voltage All I/O port DC offset Storage temperature Junction temperature Package thermal resistance Chip to ambient, θJA Chip to case, θJC 20·3V to 17V 2·5V 20·3 to VCC 10·3V 255 °C to 1150°C 1150 °C 20 °C/W 80 °C/W The output of the preamplifier is fed to the mixer section which is optimised for low radiation application. In this stage the RF signal is mixed with the local oscillator frequency, which is generated by an on-chip oscillator. The oscillator block uses an external tuneable network and is optimised for low phase noise. A typical application is shown in Figure 5. This block also contains a buffer-amplifier to interface with an external PLL to allow for frequency synthesis of the local oscillator. The IF output can be loaded either differentially or single- ended. It is recommended that the differential load as in Figure 5 is applied as this gives best noise performance. If the output is loaded single-ended the noise figure will be degraded. The approximate model of the IF output is shown in Figure 4. In application care should be taken to achieve symmetric balance to the IF outputs to maximise intermodulation performance. Figure 1 SL2035 block diagram RFIN RFIN LO2 LO1 IF1 IF2 PRSC1 |
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