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AD6432AST Datasheet(PDF) 4 Page - Analog Devices |
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AD6432AST Datasheet(HTML) 4 Page - Analog Devices |
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4 / 20 page  AD6432 –4– REV. 0 PIN FUNCTION DESCRIPTIONS Pin Label Description Function 1 GND PCB Ground Not Bonded to IC 2 MODO TX Modulator Output AC Coupled, Drives 150 Ω into 50 Ω 3 VPDV LO2 Divided by 2 Supply Voltage VPOS 4 CMTX On-Chip TX Mixer Common Ground 5 LOLO Differential RX Mixer LO2 Input Negative AC Coupled, VPOS to VPOS – 100 mV 6 LOHI Differential RX Mixer LO2 Input Positive AC Coupled, VPOS – 100 mV to VPOS 7 CMRX On-Chip RX Mixer Common Ground 8 GND PCB Ground Not Bonded to IC 9 RFLO Differential RX Mixer IF1 Input Negative AC Coupled 10 RFHI Differential RX Mixer IF1 Input Positive AC Coupled 11 GND PCB Ground Not Bonded to IC 12 VPRX RX Section Supply Voltage VPOS 13 MXHI Differential RX IF1/IF2 Mixer Output Positive See Figure 30 14 MXLO Differential RX IF1/IF2 Mixer Output Negative See Figure 30 15 CMIF On-Chip RX IF2 Common Ground 16 IFLO Differential RX IF2 Input Negative AC Coupled 17 IFHI Differential RX IF2 Input Positive AC Coupled 18 CMIF On-Chip RX IF2 Common Ground 19 RXPU RX Enable (Power-Up) Off = Low < 0.6 V, On = High > 2.5 V 20 GAIN RX VGA Gain Control Input 0.2 V–2.4 V Using 3 V Supply. Max Gain at 0.2 V 21 GREF RX VGA Reference Voltage 1.2 V typ 22 GND PCB Ground Not Bonded to IC 23 QRXN Differential Demodulator Q Output Negative Internal 4.7 k Ω Resistor in Series with the Output 24 QRXP Differential Demodulator Q Output Positive Internal 4.7 k Ω Resistor in Series with the Output 25 IRXN Differential Demodulator I Output Negative Internal 4.7 k Ω Resistor in Series with the Output 26 IRXP Differential Demodulator I Output Positive Internal 4.7 k Ω Resistor in Series with the Output 27 VPDM Demodulator Supply Voltage VPOS 28 VPFL I/Q LO PLL Filter Cap. Supply Voltage To VPOS with Good Decoupling 29 FLTR I/Q LO PLL Filter Referenced to VPFL 30 CMDM On-Chip Demodulator Common Ground 31 IFS0 IF2 Frequency Select Bit “0” = Low < 0.6 V, “1” = High > 2.5 V 32 GND PCB Ground Not Bonded to IC 33 FREF Reference Input (13 MHz for GSM) AC Coupled. Use 200 mV p-p Input Signal 34 VPPC Auxiliary Op Amp Supply Voltage VPOS 35 PCAO Auxiliary Op Amp Output Active when TXPU Is High 36 GND PCB Ground Not Bonded to IC 37 PCAM Differential Auxiliary Op Amp Input Negative 0.1 V to VPOS – 2.1 V 38 PCAP Differential Auxiliary Op Amp Input Positive 0.1 V to VPOS – 2.1 V 39 TXPU TX Enable (Power-Up) Low < 0.6 V, High > 2.5 V 40 QTXN Differential Modulator Q Input Negative DC Coupled, 1.2 V ± 514 mV 41 QTXP Differential Modulator Q Input Positive DC Coupled, 1.2 V ± 514 mV 42 ITXN Differential Modulator I Input Negative DC Coupled, 1.2 V ± 514 mV 43 ITXP Differential Modulator I Input Positive DC Coupled, 1.2 V ± 514 mV 44 VPTX TX Section Supply Voltage VPOS |
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