DUAL TONE and POLARITY SWITCH LNB MULTIPLEX CONTROLLER ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 ISSUE 1- NOVEMBER 1998 DEVICE DESCRIPTION "receiver not present", switching the channels Enable pin low. This logic output can be used to disable the associated downfeed driver, eliminating any problems due to cable mismatch. The ZLNB200X dual polarisation and tone switch controller is one of a wide range of satellite receiver LNB support circuits available from Zetex. It features two completely independent channels, each providing logic outputs to control LNB polarisation selection, local oscillator selection and downfeed disable. It is intended for use in Twin Universal LNBs, replacing many discrete components to save both manufacturing cost and PCB size whilst improving reliability. Universal LNB local oscillator selection is achieved by detection of a low level AC voltage superimposed on the polarisation control voltage. To facilitate this function, the ZLNB200X includes a separate tone detector for each channel. Full control of detector bandwidth and sensitivity is provided using two external resistors and capacitors. In the ZLNB2003/4, additional control of tone switch delays is provided to assist with the rejection of low frequency control signals intended for other systems. The two polarisation control inputs of the ZLNB200X have a nominal threshold of 14.75V. The 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. Polarisation switch and tone detector outputs can source and sink 10mA making them suitable to drive TTL and CMOS logic, pin diodes and for IF-amp supply switching. Twin Universal LNBs can be called to operate with one of their controlling receivers powered down/disconnected, with attendant cable mismatch problems. To e ase de sign f or this situation, each polarisation input of the ZLNB200X has a second threshold set at 9.5V. An input voltage below this threshold indicates The ZLNB200X operates from a single supply which can be anything from 5-10V. Its quiescent current is typically only 6mA and this does not change significantly with load or logic state. It is available in the space saving QSOP16 surface mount package. • FEATURES • • • • • • • • Dual polarisation switch Temperature compensated polarisation switch threshold Transient resistant inputs Includes Receiver-Off detector Dual tone switch User adjustable filter centre frequency and bandwidth User adjustable tone switching delays (ZLNB2003/4 only) Tone and pol. outputs TTL, CMOS, Pin diode and IF amp capable • • • • Receiver-Off detector TTL and CMOS compatible Wide supply operating range Low quiescent current Few external components Eliminates many discrete components APPLICATIONS • • • 81 Twin Universal LNB Twin Universal IF switch boxes LNB switch boxes ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 Power Dissipation (Tamb= 25°C) QSOP16 500mW ABSOLUTE MAXIMUM RATINGS Supply Voltage Supply Current VPOL1 and VPOL2 Input Voltage Operating Temperature Storage Temperature -0.6V to 12V 100mA 25V Continuous -40 to 70°C -40 to 85° ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated): Tamb= 25°C,VCC=5V,ID=10mA (RCAL1 =33kΩ) SYMBOL PARAMETER LIMITS CONDITIONS Min VCC Supply Voltage ICC Supply Current IHVout1,2=ITout1,2=0 ITout1,2=0,IHVout1,2=10mA, VPOL=15.5V Typ 5 UNITS Max 10 V 5.5 12 mA 26 32 mA VPOL1 and VPOL2 Inputs IPOL Current VPOL1 = VPOL2 = 25V (Note 2) 10 25 40 µA VTPOL Threshold Voltage Tamb=-40°C to 70°C (Note 2) 14.0 14.75 15.5 V TSPOL Switching Speed 100 µs IHVout1 and IHVout2 Outputs VHVHIGH Voltage High IHVout1,2=-20µA,VPOL1,2 = 15.5V VCC-0.2 VCC-0.1 VCC V VHVHIGH Voltage High IHVout1,2=-10µA,VPOL1,2 = 15.5V VCC-1.0 VCC-0.9 VCC V VHVLOW Voltage Low IHVout1,2=-10µA,VPOL1,2 = 14V 0 0.29 0.5 V VENHIGH Voltage High IEnable1,2=-100µA,VPOL1,2 = 10V VCC-1.0 VCC-0.75 VCC V VENHIGH Voltage High IEnable1,2=20µA,VPOL1,2 = 8.0V 0 0.14 VCC V VENLOW Voltage Low IEnable1,2=500µA,VPOL1,2 =8.0V 0 0.25 0.5 V Enable 1,2 Outputs Filter Amplifier IB Input Bias Current RF1=150k 0.02 0.07 0.25 µA Vout Vout (Note 1) RF1=150k 1.75 1.95 2.15 V Iout Iout (Note 1) Vout=1.96V, Vfin=2.1V 400 520 650 µA GV Voltage Gain F=22kHz, Vin=1mV 0 46 dB Rectifier (ZLNB2003 and ZLNB2004 ONLY) VREC Vout (Note 1) RF1=150k, IL=10µA ILeakage RF1=150k, Vout=3V (Note 1) 82 1.8 2.0 2.2 V 20 200 nA ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 ELECTRICAL CHARACTERISTICS TEST CONDITIONS (Unless otherwise stated): Tamb= 25°C,VCC=5V,ID=10mA (RCAL1 =33kΩ) LIMITS SYMBOL PARAMETER UNITS Min Typ Max 2.95 3.2 3.45 V VCC-0.2 VCC-0.1 VCC VCC-1.0 VCC-0.9 VCC 0 0.29 V 0.5 V Comparator (ZLNB2003 and ZLNB2004 ONLY) VTH VVHIGH Threshold (Note 1) Tout 1/2 Outputs Voltage High VVHIGH Voltage High VVLOW Voltage Low F=0 ITout1,2=-20µA, Test Circuit 1, Tone enabled ITout1,2=-10mA, Test Circuit 1, Tone enabled ITout1,2=10mA, Test Circuit 1, Tone disabled V Note:1) The parameters Filter Amplifier Vout, Iout, Rectifier Vout and Comparator Threshold Voltage are all directly (linearly) related to Vcc. 2) Applied via 10k resistors 83 ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 TEST CIRCUIT 1 ZLNB2001 ZLNB2002 C2 C4 VCC 68pF R4 150k C3 GND FOUT2 470pF FIN2 VPOL2 R2 150k 68pF C1 470pF FOUT1 FIN1 VPOL1 V1 5V R3 10k R1 10k + - V2 (see Note 1) + - TEST CIRCUIT 2 ZLNB2003 ZLNB2004 C2 C4 68pF CREC2 R4 150k C3 GND FOUT2 470pF FIN2 VPOL2 R3 10k R6 1M C6 100nF VCC R2 150k CREC1 68pF C1 470pF FOUT1 FIN1 VPOL1 + R5 1M C5 100nF V1 5V R1 10k V2 (see Note 1) 84 + - ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 TYPICAL CHARACTERISTICS 70 0.4 Vcc = 5V HV/Tout Voltage Low (V) Open Loop Gain (dB) Vcc = 5V 60 50 40 30 20 10 0 100 1k 10k 100k 1M 0.3 0.2 Tamb = 70°C Tamb = 25°C Tamb = -40°C 0.1 0 10M 0 2 Frequency (Hz) 4 6 8 10 Load Current (mA) Open Loop Gain v Frequency HV/Tout Voltage Low v Load Current Vcc = 5V HV/Tout Voltage High (V) Open Loop Phase (Degrees) 5.0 Vcc = 5V 180 150 120 90 60 30 0 100 1k 10k 100k 1M 10M Vcc = 5V Vin=0.1Vp/p Test Circ. 1 Fout Voltage (Vp/p) 0.8 0.6 0.4 0.2 0 1k 10k 4.2 4.0 2 4 6 8 HV/Tout Voltage High v Load Current 1.0 100 Tamb = 70°C Tamb = 25°C Tamb = -40°C 4.4 Load Current (mA) Open Loop Phase v Frequency 1.4 4.6 0 Frequency (Hz) 1.2 4.8 100k 1M Frequency (Hz) Filter Response 85 10 ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 disabling of the port. This allows the avoidance of unwanted signal reflections from an unterminated down feed cable. The following block diagram shows a typical block diagram twin universal LNB design. The ZLNB200X devices provides the two polarity and two tone switches required to decode the two independent receiver feeds. The devices are also able detect the absence of a receiver connected to either port of the LNB providing an Enable signal allowing the Horizontal Gain Stage GaAs/HEMTFET Antenna 1 3 High Band Additionally the front end bias requirements of the LNB are provided by the ZNBG4000 or ZNBG6000 offering a very efficient and cost effective solution. Control Input <=13V-Horizontal >=14.5V-Vertical + DC Input 13-25V High Band Horizontal Mixer Low Band Horizontal + H/V Output 1 Bias Generator ZNBG40XX Series ZLNB20XX Series Dual H/V Switch & 22kHz Switch High Band ASTRA 10.95 GHz-11.7 GHz Standard Band 10.7 GHz-11.8 GHz Enhanced Band Low Band Low Band Control PIN Diode MUX IF down feed 950-1750 MHz - Standard Band 950-2050 MHz - Enhanced Band High Band + 2 Vertical Antenna 4 Gain Stage GaAs/HEMTFET High Band Vertical Mixer Low Band Vertical + Low Band 86 H/V Output 2 ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 APPLICATION CIRCUIT EXAMPLES The following circuit shows the additional components that will be used for polarisation mode and 22kHz tone detection in a typical ZLNB2001/2 application. VCC ZLNB2001 C2 C4 VCC 68pF R4 150k C3 GND FOUT2 470pF FIN2 VPOL2 R2 150k 68pF C1 470pF FOUT1 FIN1 VPOL1 R1 10k R3 10k LNB Downfeed No.1 LNB Downfeed No.2 The following circuit shows the additional components that will be used for polarisation mode and 22kHz tone detection in a typical ZLNB2003/4 application. VCC ZLNB2003 C2 C4 68pF CREC2 R4 150k C3 GND FOUT2 470pF FIN2 VPOL2 R3 10k R6 1M C6 100nF VCC R2 150k CREC1 68pF C1 470pF FOUT1 FIN1 VPOL1 C5 100nF R5 1M R1 10k LNB Downfeed No.1 LNB Downfeed No.2 88 ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 FURTHER INFORMATION high. Pins Crec1 and Crec2 make accessible the outputs of the tone switch rectifiers and provides a means of c o n tr o l l i n g t o n e s w i tc h d e l a y s. Significant switching delays may be necessary to avoid incorrect operation in the presence of unwanted interference (e.g. switching tones intended for other s i g n a l l i n g sy st e m s ). F or cor re ct operation of the IC, a capacitor and a parallel connected resistor should be connected between each Crec pin and ground. The Tout low to high delays are set solely by the added capacitors at approximately 22ms/uF. The high to low delays are set by the time constant of each resistor capacitor combination at a p p r o x i m a t e l y 0 . 2 CR s e c o nd s . A capacitor of 100nF and resistor of 1MW will give a low to high delay of around 2.2ms and a high to low delay of 20ms, providing immunity to the 60Hz square wave signal occasionally used for switching between multiple LNB units. 1) Inputs VPOL1 and VPOL2 are designed to be wired to the power inputs of an LNB via high value (10k) resistors. Input VPOL1 controls outputs HVout1 and Enable1. Input VPOL2 controls outputs HVout2 and Enable2. With either input voltage set at or below 14V, the corresponding HVout pin will be in active. With either input v o l t a g e a t or a b ov e 1 5 .5 V, t he corresponding HVout pin will be active. Should the voltage applied to either VPOL input fall below 8V, the corresponding Enable pin will be low, otherwise these outputs will be high.Any input or output not required may be left open-circuit. 2) The ZLNB2001/2 includes the circuitry necessary to detect the presence of 22kHz tones modulated on either of two supply inputs to the lnb. The main elements of the detectors in each channel are an op-amp enabling the construction of a Sallen Key filter, a rectifier/smoother and a comparator. Full user control is given over the centre frequency and bandwidth of the filter using two external resistors and capacitors (one of these resistors shares the function of overvoltage protection of the corresponding VPOL pin, i.e. the 10k referenced in note 1). The comparator circuit utilises no external components. The presence of a 22kHz tone applied to pin Fin1 or Fin2 switches the corresponding output Tout1 or Tout2 high. 3) The ZLNB2003 / 4 includes the circuitry necessary to detect the presence of 22kHz tones modulated on either of two supply inputs to the LNB. The main elements of the detectors in each channel are an op-amp enabling the construction of a Sallen Key filter, a rectifier/smoother and a comparator. Full user control is given over the centre frequency and bandwidth of the filter using two external resistors and capacitors (one of these resistors shares the function of overvoltage protection of the corresponding Vpol pin, i.e. the 10k referenced in note 1). The comparator circuit utilises no external components. The presence of a 22kHz tone applied to pin Fin1 or Fin2 switches the corresponding output Tout1 or Tout2 87 ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 TONE DETECTION FUNCTION Fin1 Fin2 Tout 1 Tout 2 ZLNB2001/3 22kHz 22kHz High High - - Low Low ZLNB2002/4 22kHz 22kHz High High ZLNB2001/3 ZLNB2002/4 ZLNB2001,2,3,4 - - Low Low VPOL1 VPOL2 HVOUT1 HVOUT2 Enable 1 /2 <=14V <=14V Low Low High >=15.5V >=15.5V High High High <=14V <=14V High High High >=15.5V >=15.5V Low Low High <=8V <=8V - - Low 89 ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 CONNECTION DIAGRAMS QSOP16 Package Suffix - Q16 QSOP16 Package Suffix - Q16 Top View Top View Applies to ZLNB2001 Applies to ZLNB2002 QSOP16 Package Suffix - Q16 QSOP16 Package Suffix - Q16 Top View Top View Applies to ZLNB2004 Applies to ZLNB2003 ORDERING INFORMATION Part Number Package Part Mark ZLNB2001Q16 QSOP16 ZLNB2001 ZLNB2002Q16 QSOP16 ZLNB2002 ZLNB2003Q16 QSOP16 ZLNB2003 ZLNB2004Q16 QSOP16 ZLNB2004 90 ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 PACKAGE DIMENSIONS A IDENTIFICATION RECESS FOR PIN 1 C E J B D F PIN No.1 G K QSOP16 DIM Millimetres Inches MIN MAX MIN MAX A 4.80 4.98 0.189 0.196 B 0.635 C 0.177 0.267 0.007 0.011 D 0.20 0.30 0.008 0.012 E 3.81 3.99 0.15 0.157 F 1.35 1.75 0.053 0.069 G 0.10 0.25 0.004 0.01 J 5.79 6.20 0.228 0.244 K 0° 8° 0° 8° 0.025 NOM 91 ZLNB2001 ZLNB2002 ZLNB2003 ZLNB2004 MSOP8 DIM Millimetres Inches MIN MAX MIN MAX 0.91 1.11 0.036 0.044 A1 0.10 0.20 0.004 0.008 B 0.25 0.36 0.010 0.014 C 0.13 0.18 0.005 0.007 A D 2.95 3.05 0.116 0.120 e 0.65 NOM 0.0256 NOM e1 0.33 NOM 0.0128 NOM E 2.95 3.05 0.116 0.120 H 4.78 5.03 0.188 0.198 L 0.41 0.66 0.016 0.026 θ° 0° 6° 0° 6° SO8 DIM A Millimetres Inches Min Max Min Max 4.80 4.98 0.189 0.196 B 1.27 BSC 0.05 BSC C 0.53 REF 0.02 REF D 0.36 0.46 0.014 0.018 E 3.81 3.99 0.15 0.157 F 1.35 1.75 0.05 0.07 G 0.10 0.25 0.004 0.010 J 5.80 6.20 0.23 0.24 K 0° 8° 0° 8° L 0.41 1.27 0.016 0.050 83