PDF SL2035 Data sheet ( Hoja de datos )

Número de pieza	SL2035
Descripción	High Performance Broadband Downconverter
Fabricantes	Mitel Networks Corporation
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No Preview Available ! SL2035 High Performance Broadband Downconverter Preliminary Information DS5117 Issue 2.1 October 1999 Features Ordering Information 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. SL2035/IG/MP1S (Tubes) SL2035/IG/MP1T (Tape and Reel) 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. 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 application care should be taken to achieve symmetric balance to the IF outputs to maximise intermodulation performance. 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 RFIN RFIN LO2 LO1 Figure 1 SL2035 block diagram IF1 IF2 PRSC1 1 page Component C1 C2 C3 C4 C5 C8 C9 C10 C11 C13 C14 C15 C17 C18 C19 C21 C22 C23 C24 C30 C31 C34 C36 C37 C38 Value/type Component Value/type 1nF 1nF 1 nF 10nF 56pF 100pF 100pF 100pF 10µF 100nF 100nF 100pF 100nF 100nF 2pF 1nF 33nF 47pF 1nF 18pF 330nF 100nF 56pF NC 100nF C41 4·7µF C42 3·3nF C43 100nF C46 100pF C47 100pF D1 IT397 L3 220nH L5 1·8nH L6 220nH L7 220nH L8 1µH L9 220nH L10 680nH L11 680nH R7 15kΩ R8 22kΩ R9 15kΩ R10 1kΩ R11 4·7kΩ R12 50Ω S1 Resonator (Figure 6) T1 BCW31 X1 4MHz crystal Table 1 Component values for Figure 5 0·5 0·5 1·5 1·0 0·5 3 1·5 33 Figure 6 Microstrip resonator (dimensions are in mm) SL2035 5 5 Page

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