Datasheet LTC2248, LTC2247, LTC2246 (Analog Devices) - 8

LTC2248/LTC2247/LTC2246
W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2247: 8192 Point FFT, LTC2247: 8192 Point FFT, LTC2247: 8192 Point FFT, fIN = 30MHz, –1dB, 2V Range, fIN = 70MHz, –1dB, 2V Range, fIN = 140MHz, –1dB, 2V Range, 40Msps 40Msps 40Msps
0 0 0 –10 –10 –10 –20 –20 –20 –30 –30 –30 –40 –40 –40 –50 –50 –50 –60 –60 –60 –70 –70 –70 AMPLITUDE (dB) –80 AMPLITUDE (dB) AMPLITUDE (dB) –80 –80 –90 –90 –90 –100 –100 –100 –110 –110 –110 –120 –120 –120 0 5 10 15 20 0 5 10 15 20 0 5 10 15 20 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) 2247 G04 2247 G05 2247 G06
LTC2247: 8192 Point 2-Tone FFT, fIN = 21.6MHz and 23.6MHz, LTC2247: Grounded Input LTC2247: SNR vs Input Frequency, –1dB, 2V Range, 40Msps Histogram, 40Msps –1dB, 2V Range, 40Msps
0 30000 75 –10 24558 –20 25000 74 –30 –40 20000 –50 15714 73 14833 –60 15000 COUNT –70 SNR (dBFS) 72 AMPLITUDE (dB) –80 10000 –90 4641 4520 –100 5000 71 –110 640 546 30 36 –120 0 70 0 5 10 15 20 8184 8185 8186 81878188 8189 8190 81918192 0 50 100 150 200 FREQUENCY (MHz) CODE 2247 G07 INPUT FREQUENCY (MHz) 2247 G08 2247 G09
LTC2247: SNR and SFDR vs LTC2247: SFDR vs Input Frequency, Sample Rate, 2V Range, LTC2247: SNR vs Input Level, –1dB, 2V Range, 40Msps fIN = 5MHz, –1dB fIN = 5MHz, 2V Range, 40Msps
100 110 80 dBFS 95 70 SFDR 100 60 90 90 50 85 dBc 40 80 80 SFDR (dBFS) 30 SNR 75 SNR AND SFDR (dBFS) SNR (dBc AND dBFS) 20 70 70 10 65 60 0 0 50 100 150 200 0 20 40 60 80 –60 – 50 – 40 –30 –20 –10 0 INPUT FREQUENCY (MHz) SAMPLE RATE (Msps) INPUT LEVEL (dBFS) 2247 G10 2247 G11 2247 G12 224876fa 8