Description
AD8367 500MHz Variable Gain High Speed Data I/O AGC Amplifiers Radio Frequency Amplifier MF HF VHF Linear Amplifier
Product Description
AD8367-VCA has excellent parameters and is suitable for intermediate frequency amplification and signal amplification within 300MHz, with high gain and excellent in-band flatness.
Specification
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item
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value
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Name
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AD8367 Variable Gain Amplifier
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Size
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50mm X 40mm
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Supply voltage range
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+5V
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Installation Instructions
The sweep flatness test indicators are as follows: (input power -20dBm 50 ohm input and output matching, sweep bandwidth 300MHz)
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10MHz
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50MHz
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100MHz
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150MHz
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200MHz
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250MHz
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300MHz
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Gain 32dB
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31.11dB
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31.11dB
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31.58dB
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31.81dB
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31.81dB
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31.16dB
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28.6dB
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Gain 20dB
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19.65dB
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19.83dB
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20.25dB
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20.31dB
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20.07dB
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20.01dB
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20.04dB
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Gain 10dB
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9.85dB
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9.78dB
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10.55dB
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10.60dB
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10.23dB
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10.04dB
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10.02dB
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VCA8637 has good high-frequency characteristics, excellent in-band flatness, the layout circuit effectively suppresses the on-board self-excitation phenomenon, the control voltage is 0-1.2V, and the low gain bandwidth can reach 500MHz.
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Input power -20dBm, test chart when testing 32dB 20dB 10dB gain: In-band flatness is less than 1.5dB
Remarks: Because AD8367 is a VCA chip that is prone to self-excitation, in actual use, due to the influence of capacitance resistance tolerance and board layout, the AD8367 is prone to self-excitation when it exceeds or approaches the maximum VCA control voltage of 1.2V. It is impossible to see the dominant frequency signal with an oscilloscope. Only a vector network analyzer and a spectrum analyzer can see the maximum gain of 42dB of the AD8367.
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