A Product Line of Diodes Incorporated ZLNB2016 STANDARD DBS DUAL CHANNEL VOLTAGE AND TONE DETECTOR Summary The ZLNB2016 is a dual channel polarisation (voltage) and band select (tone) detector IC, primarily for satellite applications such as Low Noise Blocks (LNBs) and satellite distribution systems. An optimised design provides a low supply current and a wide operating voltage whilst increasing performance and reliability. The ZLNB2016 offers excellent interference rejection with minimal application cost and packaged in the 3x3mm QFN it provides a very small solution. Two robust, interference tolerant 22kHz tone detection (without external signal filtering) • “No Receiver” detect function for power saving and isolation control Wide operating supply voltage 3V to 8V VPOL1 BTD2 VPOL2 TD2 • Low external component count minimises application cost • True and inverted outputs to support popular multiplexer ICs FIN2 GND • FIN1 ENA2 Low quiescent supply current, 2mA typical TD1 BTD1 HOR2 • VCC • ENA1 Two polarisation voltage detectors HOR1 • BHOR1 Pin Assignments BHOR2 NEW PRODUCT Features Top View Application • Twin Universal LNBs • Quad Universal LNBs • Multi Output LNBs • Satellite Multi-Switches GND Bottom View Twin Universal LNB System Diagram RF Gain Stages GaAs FET’s Down Conversion IF Gain IF Switching IF Gain, LNB Control & Power Mgt. Set-top box Receiver 1 ZABG Series 4x2 MUX ZLNB 2016 Set-top box Receiver 2 Vout ZLNB2016 Document number: DS32073 Rev. 1 - 2 1 of 7 www.diodes.com ZLPM Series February 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZLNB2016 Device Description NEW PRODUCT The ZLNB2016 dual polarization and tone switch controller is one of a wide range of satellite receiver LNB support circuits available from Diodes Incorporated. It features two completely independent channels, each providing logic outputs to control LNB polarization selection, local oscillator selection and down feed disable. It’s intended to be used in voltage and tone controlled LNBs and satellite distribution systems, replacing many discrete components to save both manufacturing cost and PCB size whilst improving reliability. The ZLNB2016 has been designed to be compatible in low power consumption LNBs so to improve efficiency it operates from a single supply of 3V to 8V and has a quiescent current typically of only 2mA. The quiescent current does not change significantly with load or logic state. The two polarization control inputs of the ZLNB2016 have a nominal threshold of 14.75V and the threshold is guaranteed over the range of 14.0V to 15.5V. The threshold is temperature compensated to minimize drift and it also has a high rejection against the tone signal making the detector very accurate without the need of further external filtering. 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. Multi Feed LNBs can be called to operate with one or more of their controlling receivers powered down or disconnected, with attendant cable mismatch problems. ZLNB2016 Document number: DS32073 Rev. 1 - 2 To ease design for this situation, each polarization input of the ZLNB2016 has a second threshold set at a nominal of 8V. An input voltage below this threshold indicates “receiver not present”, and switches the relevant Ena output low. This logic output can be used to disable the associated down feed driver, eliminating any problems due to cable mismatch. Universal LNB local oscillator selection is achieved by detection of a low level AC voltage superimposed on the polarization control voltage. To facilitate this function, the ZLNB2016 includes a separate tone detector for each channel. Control of detector bandwidth and sensitivity is provided using an external resistor and capacitor for each channel. The tone detector has been designed give excellent rejection of low frequency control signals and DiSEqC™ tone bursts. The ZLNB2016 has been specifically designed to minimize the solution cost whilst being flexible. The ZLNB2016 only requires two external components per channel to give full user control and functionality. The ZLNB2016 also includes complimentary outputs so that it can directly drive many multiplexer ICs without the need of inverters. Any unused outputs can be left open circuit without any effect to the remaining circuits operation polarization switch and tone detector outputs can directly drive TTL and CMOS logic, pin diodes, IF-amp supply switching and multiplexer ICs. 2 of 7 www.diodes.com February 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZLNB2016 Maximum Ratings Parameter Supply Voltage Supply Current VPOL 1, 2 Input Voltage (Note 1) Power Dissipation Operating Temperature Range Storage Temperature Range NEW PRODUCT Electrical Characteristics Parameter Operating Voltage Range Supply Current Rating -0.6 to +10 Continuous 50 25 500 -40 to +85 -40 to +150 Unit V mA V mW °C °C (at Tamb = 25°C, Vcc = 3.3V unless otherwise specified. Conditions Min. 3.0 All outputs unloaded, any combination of inputs VPOL1, 2 Inputs (Note 1) Input Current HOR Threshold ENA Threshold Switching Speed VPOL1,2 = 15V TAMB = -40 to +85°C TAMB = -40 to +85°C HOR, BHOR and ENA outputs HOR1, 2 Outputs Voltage High Voltage Low Typ. 2.0 Max. 8.0 3.0 Unit V mA 32 14.0 7.5 42.5 14.75 8.0 53 15.5 8.5 1 uA V V ms ILOAD = -1mA, VPOL1,2 = 15.5V ILOAD = 5mA, VPOL1,2 = 14.0V VCC-0.5 0 VCC-0.3 0.3 VCC 0.5 V V BHOR1, 2 Outputs Voltage High Voltage Low ILOAD = -1mA, VPOL1,2 = 14.0V ILOAD = 5mA, VPOL1,2 = 15.5V VCC-0.5 0 VCC-0.3 0.3 VCC 0.5 V V ENA1, 2 Outputs Voltage High Voltage Low ILOAD = -1mA, VPOL1,2 = 8.5V ILOAD = 5mA, VPOL1,2 = 7.5V VCC-0.5 0 VCC-0.3 0.3 VCC 0.5 V V 1.25 1.74 40 50 150 3 2.25 V kΩ 300 10 mV ms FIN 1, 2 Inputs (Using Test Circuit 1) Bias Voltage Input Impedance Amplifier Gain Voltage Threshold Switching Delay IFIN = 0 VFIN = 100mVP/P VFIN = 100mVP/P 100 TD Outputs TD1, 2 Outputs (Using Test Circuit 1) Voltage High ILOAD = -1mA, Tone Enabled Voltage Low ILOAD = 5mA, Tone Disabled VCC-0.5 0 VCC-0.3 0.3 VCC 0.5 V V BTD1, 2 Outputs (Using Test Circuit 1) Voltage High ILOAD = -1mA, Tone Disabled Voltage Low ILOAD = 5mA, Tone Enabled VCC-0.5 0 VCC-0.3 0.3 VCC 0.5 V V Notes: 1. VPOL stimulus applied via 20k resistors. All levels measured on the input to these resistors. 2. ESD sensitive, handling precautions are recommended. ZLNB2016 Document number: DS32073 Rev. 1 - 2 3 of 7 www.diodes.com February 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZLNB2016 Test Circuit EN A1 VC C H OR1 BH OR1 NEW PRODUCT 180pF TD1 FIN1 BTD1 VPOL1 ZLNB2016 BTD2 TD2 CF1 RP1 RP2 VPOL2 V1 3.3V 20k 20k FIN2 V2 (See Note 1) GND ENA2 HOR 2 BHOR2 CF2 180pF Note 1: V2 Characteristics Type:AC source Frequency:- 22kHz Voltage:300mVp/p Enabled Zero Disabled Tone Input (V2) TD Outputs Switching Delays ZLNB2016 Document number: DS32073 Rev. 1 - 2 4 of 7 www.diodes.com February 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZLNB2016 E NA1 V CC H OR 1 B HO R1 Applications Information 180pF TD1 FIN1 BTD1 VPOL1 ZLNB2016 R1 R2 VPOL2 TD2 Downfeed 1 20k Downfeed 2 20k FIN2 C2 G ND ENA2 H OR 2 180pF B HOR2 NEW PRODUCT BTD2 C1 Above is a partial applications circuit for the ZLNB2016 showing all external components needed for a typical twin LNB design. The inputs Vpol1 and Vpol2 are designed to be wired to the power inputs of the LNB via ESD protection resistors (20k). These inputs control the HOR1/2, BHOR1/2 and ENA1/2 logic outputs. The HOR outputs will be low when their corresponding Vpol input is at or below 14V and high when Vpol is at or above 15.5V. The BHOR outputs give inverted versions of their related HOR outputs. The HOR/BHOR outputs are intended to activate polarisation selection circuitry within an LNB, under control of the LNB supply voltage. The ENA1/2 outputs are set high when their corresponding Vpol input is at or above 8.5V and low when Vpol is at or below 7.5V. These logic outputs can be used to disable any LNB RF output connected to a receiver (STB) that has been powered down or disconnected (and hence not providing correct cable matching). The ZLNB2016 includes circuitry necessary to detect the presence of a 22kHz tone modulated on either of two supply inputs to the LNB. These detectors control the TD1/2 and BTD1/2 outputs. The TD outputs are set high on detection of a valid tone on their corresponding LNB input and low in the absence of a tone. The BTD outputs give an inverted version of their corresponding TD outputs. The main elements of each tone detector are an amplifier, a band-pass filter, a rectifier/smoother and a comparator. User control is given over the gain of the amplifier and the lower frequency limit of the filter, using an external resistor and capacitor. (The ESD protection resistor noted above can be used to set amplifier gain, hence requiring only one component for both functions.) The higher frequency limit of the filter is set internally to block signals above 100kHz. The comparator circuit utilises no external components. The HOR, BHOR, TD, BTD and ENA outputs are designed to be compatible with LSTTL, CMOS and common MIMIC multiplexer loads. Any input or output that is not required can be left open circuit. Output Truth Table The ZLNB2016 includes two independent channels, each containing a voltage detector and tone detector. The following truth table applies to each channel. Tone Off Off On On - Vpol 14V 14.5V 14V 14.5V <7.5V ZLNB2016 Document number: DS32073 Rev. 1 - 2 TD Low Low High High - BTD High High Low Low - 5 of 7 www.diodes.com HOR Low High Low High Low BHOR High Low High Low High ENA High High High High Low February 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZLNB2016 Package Outline Dimensions E A1 D NEW PRODUCT A3 A E2 Pin #1 ID L D2 e b Z QFN16 3x3 Dim Min Max A 0.55 0.65 A1 0.00 0.05 A3 0.15 Typ b 0.18 0.28 D 2.95 3.05 D2 1.40 1.60 e 0.50 BSC E 2.95 3.05 E2 1.40 1.60 L 0.35 0.45 Z 0.625 Typ All Dimensions in mm Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches. The package appearance may vary as shown, for further details please contact your local Diodes sales office. Ordering Information (Note x) Device Package ZLNB2016JA16TC QFN1633 ZLNB2016 Document number: DS32073 Rev. 1 - 2 Reel Size (inches) 13 6 of 7 www.diodes.com Tape Width (mm) 8 Quantity (per reel) 3000 February 2010 © Diodes Incorporated A Product Line of Diodes Incorporated ZLNB2016 IMPORTANT NOTICE NEW PRODUCT DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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