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LT5503 Datasheet(PDF) 5 Page - Linear Technology |
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LT5503 Datasheet(HTML) 5 Page - Linear Technology |
5 / 20 page LT5503 5 5503f TYPICAL PERFOR A CE CHARACTERISTICS Modulator Supply Current vs Supply Voltage Modulator Shutdown Current vs Supply Voltage MODEN Current vs Enable Voltage Baseband Frequency Response I/Q Amplitude = 1VP-P MODRFIN and MODRFOUT Return Loss 2.4GHz Matching Typical SSB Spectrum VCC1 SUPPLY VOLTAGE (V) 1.8 3.2 4.6 5.3 38 36 34 32 30 28 26 24 22 20 5503 G01 2.5 3.9 TA = 85°C TA = 25°C TA = –40°C VCC1 SUPPLY VOLTAGE (V) 1.8 3.2 4.6 5.3 100 10 1 0.1 5503 G02 2.5 3.9 TA = 85°C TA = 25°C TA = –40°C MODEN = LOW MODEN VOLTAGE (V) 1.8 3.2 4.6 5.3 220 200 180 160 140 120 100 80 60 40 5503 G03 2.5 3.9 TA = 85°C TA = –40°C MODEN = VCC1 TA = 25°C I, Q INPUT FREQUENCY (MHz) 1 0 –5 –10 –15 –20 –25 –30 –35 –40 5503 G05 0.1 10 IMAGE CARRIER DESIRED SIDEBAND FREQUENCY (MHz) 2050 –20 –10 2850 5503 G06 –30 –40 2250 2450 2650 0 MODRFOUT MODRFIN VCC1 = 3VDC, 2.4GHz matching, MODEN = high, GC1 = GC2 = low (max gain), TA = 25°C, MODRFIN = 2.45GHz at –16dBm, (I–IB) and (Q–QB) = 100kHz sine at 1VP-P differential, Q leads I by 90°, unless otherwise noted. (Test circuit shown in Figure 2.) (I/Q Modulator) FREQUENCY (MHz) 0 –10 –20 –30 –40 –50 –60 –70 –80 –90 –100 5503 G07 2449.6 2449.8 2450.0 2450.2 2450.4 2450.6 SUPPLY VOLTAGE (V) 1.8 –2 –3 –4 –5 –6 2.4 3.0 3.6 4.2 5503 TA01b 4.8 5.4 PLO1 = –12dBm PLO2 = –18dBm BASEBAND = 1VP-P TA = 25°C 2.45GHz Modulated Output Power vs Supply Voltage |
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