ZLNB101 DUAL POLARISATION SWITCH TWIN LNB MULTIPLEX CONTROLLER ISSUE 1- JANUARY 2001 DEVICE DESCRIPTION FEATURES APPLICATIONS

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1 DUAL POLARISATION SWITCH TWIN LNB MULTIPLEX CONTROLLER ISSUE - JANUARY 00 ZLNB0 DEICE DESCRIPTION The ZLNB0 dual polarisation switch controller is one of a wide range of satellite receiver LNB support circuits. It features two completely independent channels, each providing two logic outputs under the control of a voltage sensitive input. It is intended for use in Twin LNB designs, replacing many discrete components to save both manufacturing cost and PCB size whilst improving reliability. The two inputs of the ZLNB0 have a nominal threshold of.5. Their threshold is temperature compensated to minimise drift. Each features a low and stable input current that enables transient protection to be achieved with the addition of only a single resistor per channel. Normal and an inverted outputs are provided for each input. All outputs can source 5 and sink 0 making them suitable to drive TTL and CMOS logic, pin diodes and for IF-amp supply switching. The ZLNB0 operates from a single supply of between 5-. Its quiescent current is typically only and this does not change significantly with load or logic state. It is available in either the standard or space saving surface mount packages. Device operating temperature is -0 C to +85 C to suit a wide range of environmental conditions. FEATURES provides polarity detection and control transient resistant low input current low supply current temperature compensated input threshold standard and inverted output available simultaneously wide supply operating range dual polarisation switch eliminates external components simplifies design APPLICATIONS twin LNBs IF switch box LNB switch boxes 75

2 ABSOLUTE MAXIMUM RATINGS Supply oltage -0.6 to 5 Supply Current 50 POL and POL Input oltage 5 Continuous Operating Temperature -0 to 85 C Storage Temperature -0 to 85 Power Dissipation (Tamb= 5 C) 500mW 500mW ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated): T amb = 5 C, CC =5,I D =0 (R CAL =kω) SYMBOL PARAMETER CONDITIONS LIMITS UNITS Min Typ Max CC Supply oltage 5 I CC Supply Current All inputs and outputs open circuit I ERT = I ERT = 0, POL = POL = I HOR = I HOR = 0, POL = POL = POL and POL Inputs I POL Current POL = POL = 5 (Note ) µa TPOL Threshold (Note ) (Note ) oltage T SPOL Switching Speed 00 µs HIGH HIGH HIGH LOW HIGH HIGH HIGH LOW ert / Outputs oltage High oltage High oltage High oltage Low Hor / Outputs oltage High oltage High oltage High oltage Low I ERT =I ERT =0, POL = POL = I ERT =I ERT =5, POL = POL = I ERT =I ERT =0µA, POL = POL = I ERT =I ERT =-0, POL = POL = 5.0 I HOR =I HOR =0, POL = POL = 5.0 I HOR =I HOR =5, POL = POL = 5.0 I HOR =I HOR =0µA, POL = POL = 5.0 I HOR =I HOR =-0, POL = POL = CC -.0 CC -0.8 CC -. CC -0.9 CC -0. CC CC -.0 CC -0.8 CC -. CC -0.9 CC -0. CC CC CC CC 0.5 CC CC CC

3 Note:- ) POL and POL switching thresholds apply over the whole operating temperature range specified above. ) Inputs POL and POL are designed to be wired to the power input of an LNB via high value (0k) resistors. Input POL controls outputs ert and Hor. Input POL controls outputs ert and Hor. With either input voltage set at or below, the corresponding ert pin will be high and Hor pin low. With either input voltage at or above 5.0, the corresponding ert pin will be low and Hor pin high. Any input or output not required may be left open-circuit. ) All outputs are designed to be compatible with TTL, CMOS, pin diode and IF Amp loads. ) Applied via 0k resistors The following block diagram shows a typical block diagram twin LNB design. The ZLNB0 provides the two polarity switches required to decode the two independent receiver feeds. Additionally the front end bias requirements of the LNB are provided by the ZNBG000 or ZNBG6000 offering a very efficient and cost effective solution. Horizontal Antenna Gain Stage GaAs/HEMTFET Mixer Control Input <=-Horizontal >=5-ertical DC Input -5 + Horizontal H/ Output Bias Generator ZNBG0XX Series ZLNB0 Series Dual H/ Switch Control PIN Diode MUX IF down feed MHz - Standard Band MHz - Enhanced Band + ertical H/ Output ertical Antenna Gain Stage GaAs/HEMTFET Mixer 77

4 CONNECTION DIAGRAMS ORDERING INFORMATION Part Number Package Part Mark ert Hor G nd p Hor ert cc p ZLNB0X8 ZLNB0 ZLNB0N8 ZLNB0 ert 8 cc Hor 7 p ert 6 p Hor 5 Gnd

5 PACKAGE DIMENSIONS DIM Millimetres Inches D MIN MAX MIN MAX A A E H B C e X 6 θ D e 0.65 NOM NOM e 0. NOM 0.08 NOM A A B C L E H L θ DIM Millimetres Inches Min Max Min Max A B.7 BSC 0.05 BSC C 0.5 REF 0.0 REF D E F G J K L