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AD9874EB Datasheet(PDF) 9 Page - Analog Devices |
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AD9874EB Datasheet(HTML) 9 Page - Analog Devices |
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9 / 40 page  REV. 0 AD9874 –9– (VDDI = VDDF = VDDA = VDDC = VDDL = VDDD = VDDH = VDDx, VDDQ = VDDP = 5.0 V, fCLK = 18 MSPS, fIF = 109.56 MHz, fLO = 107.4 MHz, TA = 25 C, LO = –5 dBm, LO and CLK Synthesizer Disabled, 16-Bit Data with AGC and DVGA enabled, unless otherwise noted.) 1 LO DRIVE – dBm 0.1 –20 –14 –8 –5 0 –0.2 –0.4 –0.6 –0.8 –0.1 –0.3 –0.5 –0.7 –11 –17 LOW BIAS HIGH BIAS TPC 7a. Normalized Gain Variation vs. LO Drive (VDDx = 3.0 V) FREQUENCY – kHz 0 –140 –20 –40 –60 –80 –100 –120 –80 –60 –40 –20 0 20 40 60 80 –2.8 dBFS OUTPUT NBW = 3.66kHz fCLK = 18MHz MAX VGA ATTEN DEC–BY–120 TPC 8a. Complex FFT of Baseband I/Q for Single-Tone (High Bias) FREQUENCY – kHz 0 –140 –20 –40 –60 –80 –100 –120 –80 –60 –40 –20 0 20 40 60 80 NBW = 3.66kHz fCLK = 18MHz MAX VGA ATTEN DEC–BY–120 IMD = 74dBc –18.2dBFS OUTPUT TPC 9a. Complex FFT of Baseband I/Q for Dual Tone IMD (High Bias with each IFIN Tone @ –35 dBm) LO DRIVE – dBm 9.0 –20 –10 0 5 8.6 8.2 7.8 7.4 7.0 8.4 8.0 7.6 7.2 –5 –15 NF-HIGH BIAS IMD-HIGH BIAS NF-LOW BIAS IMD-LOW BIAS 8.8 0 –20 –40 –60 –80 –30 –50 –70 –10 TPC 7b. Noise Figure and IMD vs. LO Drive (VDDx = 3.0 V) IFIN – dBm 0 –30 –14 ADC GOES INTO “HARD COMPRESSION” –28 –26 –24 –22 –20 –18 –16 –2 –4 –6 –8 –10 –12 2.7V 3.0V 3.3V 3.6V TPC 8b. Gain Compression vs. IFIN (High Bias2) IFIN – dBm –70 –124 –76 –82 –88 –100 –106 –118 –51 –48 –45 –42 –39 –36 –33 –30 PIN 2.7V 3.6V 3.0V 3.3V –130 –112 –94 –15 –42 –18 –21 –24 –30 –33 –39 –45 –36 –27 TPC 9b. IMD vs. IFIN (High Bias2) IFIN – dBm –12 –36 –18 –24 –30 –36 –15 –21 –27 –33 –33 –30 –27 –24 –21 –18 –15 –12 –9 –6 –3 0 HIGH BIAS LOW BIAS TPC 7c. Gain Compression vs. IFIN with 16 dB LNA Attenuator Enabled IFIN – dBm 0 –30 –14 ADC DOES NOT GO INTO “HARD COMPRESSION” –28 –26 –24 –22 –20 –18 –14 –2 –4 –6 –8 –10 –12 2.7V 3.0V 3.3V 3.6V –16 TPC 8c. Gain Compression vs. IFIN (Low Bias3) IFIN – dBm –55 –109 –61 –67 –73 –85 –91 –103 –51 –48 –45 –42 –39 –36 –33 –30 PIN 2.7V 3.6V 3.0V 3.3V –115 –97 –79 –15 –42 –18 –21 –24 –30 –33 –39 –45 –36 –27 TPC 9c. IMD vs. IFIN (Low Bias3) 1Data taken with Toko FSLM series 10 µH inductors 2High Bias corresponds to LNA_Mixer Setting of 33 in SPI Register 0x01 3Low Bias corresponds to LNA_Mixer Setting of 12 in SPI Register 0x01 |
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