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MAX3580ETJ+ Datasheet(PDF) 10 Page - Maxim Integrated Products |
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MAX3580ETJ+ Datasheet(HTML) 10 Page - Maxim Integrated Products |
10 / 21 page Direct-Conversion TV Tuner 10 ______________________________________________________________________________________ Pin Description PIN NAME FUNCTION 1 SDA Serial-Data Input Line. Requires a pullup resistor to VCC. 2 SCL Serial-Clock Input. Requires a pullup resistor to VCC. 3 RFIN2 Second RF Input 4 RFIN First RF Input 5 ADDR2 Address Line. Sets the 3rd LSB of the device address. Connect to ground to set for “0” or VCC to set for “1.” 6 GND_LNA Not Internally Connected. Connect to ground. 7 VCC_RF DC Supply for RF LNA. Connect as close as possible a 100pF capacitor from this pin to GND. 8 LEXT External Bias Inductor. Connect to VCC with a 270nH inductor. 9 RF_AGC Gain Control Input for RF VGA. 10 IND1 VHF Inductor Pin 1. Keep traces to inductor as short as possible. 11 IND2 VHF Inductor Pin 2. Keep traces to inductor as short as possible. 12 N.C. No Connection 13 OVLD_DET Overload Detector Output. No connection required to this pin. 14 VCC_BB DC Supply for Baseband Filter. Connect as close as possible a 10nF capacitor from this pin to ground. 15 BBQ- Quadrature Inverted Baseband Output 16 BBQ+ Quadrature Noninverted Baseband Output 17 BBI- In-Phase, Inverted Baseband Output 18 BBI+ In-Phase, Noninverted Baseband Output 19 BB_AGC Gain Control Input for Baseband VGAs 20 VCC_VCO DC Supply for the VCO. Connect as close as possible a 100pF capacitor from this pin to ground. 21 VTUNE VCO Tuning Voltage Input. Connect the PLL loop filter output directly to this pin. 22 GND_TUNE Ground Reference for the Tuning Voltage. Connect to ground of the loop filter. 23 LDO VCO LDO Output. Connect a 0.1µF capacitor to ground. 24 CP Charge-Pump Output. Connect the charge-pump output to the PLL loop filter input. 25 GND_CP Ground for the Charge Pump 26 VCC_SYN DC Supply for Synthesizer and Serial-Interface Control. Connect as close as possible a 10nF capacitor from this pin to ground. 27 GND_PLL Ground for the PLL 28 MUX Multiplex Output Line. Can be used as a PLL lock-detector output. 29 REF_BUFF Buffered Output of Reference Oscillator 30 VCC_XTAL DC Supply for Reference Oscillator. Connect as close as possible a 10nF capacitor from this pin to ground. 31 XB Reference Input. Connect to a parallel resonant mode XTAL through a load-matching capacitor, or can also be used as a reference clock input pin. 32 XE Reference Oscillator Feedback. Connect to a capacitive divider when used in self-oscillating mode. —EP Exposed Paddle. Internally connected to ground. Solder EP to the board’s ground plane to achieve the lowest possible impedance path and optimum RF performance. |
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