Datasheet LTC1748 (Analog Devices) - 7

LTC1748
W U TYPICAL PERFOR A CE CHARACTERISTICS 8192 Point FFT, 8192 Point FFT, 8192 Point 2-Tone FFT, Input Frequency = 69.1MHz, Input Frequency = 69.1MHz, Input Frequency = 5MHz and –10dB, 3.2V Range –20dB, 3.2V Range 7MHz, –7dB, 3.2V Range
0 0 0 TA = 25°C TA = 25°C TA = 25°C –10 –10 –10 –20 –20 –20 –30 –30 –30 –40 –40 –40 –50 –50 –50 –60 –60 –60 –70 –70 –70 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 –90 –90 –90 –100 –100 –100 –110 –110 –110 –120 –120 –120 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 40 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) 1748 G16 1748 G17 1748 G18
8192 Point 2-Tone FFT, 8192 Point 2-Tone FFT, Input Frequency = 25MHz and Input Frequency = 65MHz and 30MHz, –7dB, 3.2V Range 70MHz, –7dB, 3.2V Range SFDR vs 15MHz Input Level
0 0 120 TA = 25°C TA = 25°C dBFS TA = 25°C –10 –10 110 –20 –20 100 –30 –30 90 –40 –40 80 –50 –50 70 dBc –60 –60 60 –70 –70 50 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 40 SFDR dBc AND dBFS –90 –90 30 –100 –100 20 –110 –110 10 –120 –120 0 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 40 –80 –70 –60 –50 –40 –30 –20 –10 0 FREQUENCY (MHz) FREQUENCY (MHz) INPUT LEVEL (dBFS) 1748 G19 1748 G20 1748 G21
SFDR vs 30MHz Input Level SFDR vs 50.3MHz Input Level SFDR vs 70.3MHz Input Level
120 120 120 TA = 25°C TA = 25°C TA = 25°C 110 110 110 dBFS dBFS 100 100 100 dBFS 90 90 90 80 80 80 70 70 70 dBc 60 60 60 dBc dBc 50 50 50 40 40 40 SFDR dBc AND dBFS SFDR dBc AND dBFS SFDR dBc AND dBFS 30 30 30 20 20 20 10 10 10 0 0 0 –80 –70 –60 –50 –40 –30 –20 –10 0 –80 –70 –60 –50 –40 –30 –20 –10 0 –80 –70 –60 –50 –40 –30 –20 –10 0 INPUT LEVEL (dBFS) INPUT LEVEL (dBFS) INPUT LEVEL (dBFS) 1748 G22 1748 G23 1748 G24 1748fa 7