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L8312 Dataheets PDF



Part Number L8312
Manufacturers Unisonic Technologies
Logo Unisonic Technologies
Description DUAL POLARIZATION AND TONE SWITCH CONTROLLER
Datasheet L8312 DatasheetL8312 Datasheet (PDF)

UNISONIC TECHNOLOGIES CO., LTD L8312 Preliminary LINEAR INTEGRATED CIRCUIT DUAL POLARIZATION AND TONE SWITCH CONTROLLER  DESCRIPTION The UTC L8312 is specially designed integrated circuit for control satellite receiver front-end block switch and provides customers with dual independent channel of two-control signal: polarization and tone switch controller for LNB switch signal path selection. The UTC L8312 is characterized by its two independent channels and each provides logical outputs .

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UNISONIC TECHNOLOGIES CO., LTD L8312 Preliminary LINEAR INTEGRATED CIRCUIT DUAL POLARIZATION AND TONE SWITCH CONTROLLER  DESCRIPTION The UTC L8312 is specially designed integrated circuit for control satellite receiver front-end block switch and provides customers with dual independent channel of two-control signal: polarization and tone switch controller for LNB switch signal path selection. The UTC L8312 is characterized by its two independent channels and each provides logical outputs to show status of LNB switch polarization selection and 22 KHz tone signal. Minimum number of external discrete components and the wide range of supply voltage make this device suitable in Twin, Quad and multiple feed universal LNB switch to get lower cost and minimum PCB size. In order to satisfy the special LNB switch model, a tighter specification has been taken into consideration for the polarization switch characteristics. The number of external components is also reduced. The UTC L8312 includes separate 22K tone detection for each channel. In addition, the built-in tone amplifier circuit is designed to protect transient signal by an external resistor and capacitor simply, and it also provides good bandwidth and sensitivity. The UTC L8312 is generally applied in multi output LNB and multi switch.  FEATURES * Direct Drive PIN Diode and Multiplexer IC * High Supply Voltage  ORDERING INFORMATION Ordering Number L8312G-R16-R Package SSOP-16 SSOP-16 Packing Tape Reel L8312G-R16-R (1)Packing Type (2)Package Type (3)Green Package (1) R: Tape Reel (2) R16: SSOP-16 (3) G: Halogen Free and Lead Free  MARKING www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 6 QW-R123-016.c L8312 Preliminary  PIN CONFIGURATION LINEAR INTEGRATED CIRCUIT  PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 PIN NAME S2A S2B S2C S2D VCC CENB2 FIN2 POL2 POL1 FIN1 CENB1 GND S1D S1C S1B S1A Channel 2 Switch Output A Channel 2 Switch Output B Channel 2 Switch Output C Channel 2 Switch Output D Supply Voltage Pin Channel 2 Enable Channel 2 22KHz Tone Input Pin Channel 2 Polarization Input Pin Channel 1 Polarization Input Pin Channel 1 22KHz Tone Input Pin Channel 1 Enable Ground Pin Channel 1 Switch Output A Channel 1 Switch Output B Channel 1 Switch Output C Channel 1 Switch Output D DESCRIPTION UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R123-016.c L8312  BLOCK DIAGRAM Preliminary LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R123-016.c L8312 Preliminary LINEAR INTEGRATED CIRCUIT  ABSOLUTE MAXIMUM RATING (TA=-25 ~ +85°C) PARAMETER SYMBOL RATINGS UNIT Supply Voltage Supply Current VS -0.6 ~ 12 V IS 100 mA Input Voltage (POL Pin) Power Dissipation (TA=25°C) VIN PD 25 V 600 mW Operating Junction Temperature Storage Temperature TJ TSTG -40 ~ 70 -50 ~ 85 °C °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied.  ELECTRICAL CHARACTERISTICS (VCC=5V, TA=25°C, unless otherwise specified) PARAMETER SYMBOL Supply Voltage (TOPR = -40°C ~ 80°C) Supply Current VCC ICC Output Voltage High Output Voltage Low SWHIGH SWLOW TONE/POLARITY SWITCH CHARACTERISTICS Tone Switch Threshold VTST Low Frequency Rejection Polarity Detector Input Current fRL IPOL Polarity Detector Threshold Voltage VTPOL Switching Speed Enable Threshold Voltage TS VENB TEST CONDITIONS Standby current, no load ISW =-5mA ISW =5mA Coupling via 10nF(sin wave) Coupling via 10nF(sin wave) VPOL1, 2 input=25V, via RPOL=1KΩ VPOL1, 2 input applied via RPOL=1KΩ VPOL1, 2 input applied via RPOL=1KΩ ICENB =-50μA MIN TYP MAX 59 10 VCC-1.0 VCC-0.9 VCC 0 0.3 0.5 100 170 350 1.0 7.5 100 130 200 14.0 14.5 15.0 100 0.7 1.2 1.5 UNIT V mA V mVPP KHZ μA V ms V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R123-016.c L8312 Preliminary  TYPICAL APPLICATION CIRCUIT LINEAR INTEGRATED CIRCUIT 1M (Note 1) 0.1u (Note 2) VCC 1k 10n 1k S2A S2B S2C S2D VCC CENB2 FIN2 POL2 S1A S1B S1C S1D GND CENB1 FIN1 POL1 10n 1k 1k 0.1u(Note 3) VPOL& Tone 4X1 Switch 0.1u(Note 3) Note:1. Current limitation resistance 2. Required BYPASS capacitor for noise interference elimination 3. Optional BYPASS capacitor for 22KHz tone interference elimination UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R123-016.c L8312 Preliminary LINEAR INTEGRATED CIRCUIT  FUNCTIONAL INFORMATION The UTC L8312 is specially designed integrated circuit for control satellite receiver front-end block switch, it contains all the circuits necessary to detect the DC voltage and 22KHz signal on the supply input to the LNB switch. The tone switch circuit incorporates an operational amplifier used as active filter, a rectifier /a comparator and an output driver. Built-in feedback resistor included in operational ampl.


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