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AD6458 Datasheet(PDF) 3 Page - Analog Devices |
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AD6458 Datasheet(HTML) 3 Page - Analog Devices |
3 / 12 page AD6458 –3– REV. 0 ABSOLUTE MAXIMUM RATINGS 1 Supply Voltage VPS1, VPS2 to COM1, COM2 . . . . . +3.6 V Internal Power Dissipation 2 . . . . . . . . . . . . . . . . . . . . 600 mW Operating Temperature Range . . . . . . . . . . . –40 °C to +85°C Storage Temperature Range . . . . . . . . . . . . –65 °C to +150°C Lead Temperature, Soldering (60 sec) . . . . . . . . . . . +300 °C NOTES 1Stresses above those listed under Absolute Maximum Ratings may cause perma- nent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended rating conditions for extended periods may affect device reliability. 2Thermal Characteristics: 20-Lead SSOP Package: θ JA = 126 °C/W. ORDERING GUIDE Temperature Package Package Model Range Description Option AD6458ARS –40 °C to +85°C 20-Lead Shrink Small Outline RS-20 PIN FUNCTION DESCRIPTIONS Pin Pin Number Label Description Function 1 FREF Frequency Reference Input Demodulation LO Input. May be 3 V CMOS input or >100 mV ac coupled for lowest stand by current. 2 COM1 Common 1 Ground. 3 PRUP Power-Up Input CMOS compatible power up control; 0 = OFF, 3 V = ON. 4 LOIP Local Oscillator Input AC coupled LO input. Only 50 mV drive needed, 500 mV max. 5 RFLO RF “Low” Input Usually connected to ac ground. 6 RFHI RF “High” Input AC coupled, –109 dBV to –29 dBV RF input from 1 k Ω filter for optimal operation. 7 COM2 Common 2 Ground. 8 GREF Gain Reference Input High impedance input, sets gain scaling, typically 1.2 V. 9 MXOP Mixer Output Output of the Mixer. 10 NC Not internally connected. Should be grounded. 11 IFIP IF Input “Plus” Differential Input of variable gain amplifier. 12 IFIM IF Input “Minus” Differential Input of variable gain amplifier. 13 GAIN Gain Control Input 0.2 V–2.4 V using 3 V supply. Max gain at 0.2 V. 14 QRXN Q Output “Negative” Differential Q Output. 15 QRXP Q Output “Positive” Differential Q Output. 16 IRXN I Output “Negative” Differential I Output. 17 IRXP I Output “Positive” Differential I Output. 18 VPS2 VPOS Supply 2 Supply Voltage. 19 FLTR PPL Loop Filter Series RC loop filter, connected to VPS2. 20 VPS1 VPOS Supply 1 Supply Voltage. PIN CONNECTION 20-Lead SSOP (RS-20) 14 13 12 11 17 16 15 20 19 18 10 9 8 1 2 3 4 7 6 5 TOP VIEW (Not to Scale) AD6458 FREF IRXP VPS2 FLTR VPS1 COM1 PRUP LOIP QRXN QRXP IRXN RFLO RFHI COM2 GREF MXOP NC IFIP IFIM GAIN NC = NO CONNECT WARNING! ESD SENSITIVE DEVICE CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although the AD6458 features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. |
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