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AD6458 Datasheet(PDF) 7 Page - Analog Devices |
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AD6458 Datasheet(HTML) 7 Page - Analog Devices |
7 / 12 page AD6458 –7– REV. 0 VGAIN – Volts –8 –9 –15 0 2.5 0.5 1.0 1.5 2.0 –11 –12 –13 –14 –10 VPOS = 3.6V TA = +85°C VPOS = 3.0V TA = +85°C VPOS = 3.6V TA = +25°C VPOS = 3.0V TA = +25°C VPOS = 3.0V TA = –25°C VPOS = 3.0V TA = –40°C Figure 11. Mixer Input 1 dB Compression Point vs. VGAIN, VREF = 1.2 V, FRF = 83 MHz, FIF = 13 MHz INTERMEDIATE FREQUENCY – dB 70 0 545 10 15 20 25 30 35 40 60 40 30 20 10 50 VGAIN = 0.2V VGAIN = 1.0V VGAIN = 1.5V VGAIN = 2.25V Figure 12. IF Amplifier and Demodulator Gain vs. Frequency, TA = +25°C, VPOS = 3.0 V, VREF =1.2 V VGAIN – Volts 70 60 –10 0 2.5 0.5 1.0 1.5 2.0 30 20 10 0 50 40 TA = –40°C TO +85°C Figure 13. IF Amplifier and Demodulator Gain vs. VGAIN, TA = +25°C, VPOS = 3.0 V, FIF = 13 MHz, VREF = 1.2 V VGAIN – Volts –5 –10 –60 0 2.5 0.5 1.0 1.5 2.0 –25 –40 –45 –50 –15 –20 –35 –30 –55 TA = –40°C TA = –25°C TA = +25°C TA = +85°C Figure 14. IF Amplifier/Demodulator Input 1 dB Compres- sion Point vs. VGAIN, FIF =13 MHz, VREF = 1.2 V, TA = +25°C, VPOS = 3.0 V IF FREQUENCY – MHz 12000 6000 0 0 100 10 20 30 40 50 60 70 80 90 10000 8000 4000 2000 R SHUNT, VGAIN = 2.2V C SHUNT, VGAIN = 1.0V R SHUNT, VGAIN = 1.0V R SHUNT, VGAIN = 0.2V C SHUNT, VGAIN = 2.2V C SHUNT, VGAIN = 0.2V 3.5 3.0 2.5 2.0 1.5 1.0 0.5 Figure 15. IF Amplifier Input Impedance vs. Frequency, TA = +25°C, VPOS = 3.0 V, VREF = 1.2 V GAIN VOLTAGE – Volts 1 0.8 0 0 2.5 0.5 1 1.5 2 0.2 –0.6 –0.8 –1 0.6 0.4 –0.4 –0.2 MIXER IF AMP/DEMOD Figure 16. AD6458 Gain Error vs. Gain Control Voltage, Representative Part |
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