Datasheet LTC2238, LTC2237, LTC2236 (Analog Devices) - 8

LTC2238/LTC2237/LTC2236
W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2237: 8192 Point FFT, LTC2237: 8192 Point FFT, LTC2237: 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) –80 AMPLITUDE (dB) –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) 223876 G19 223876 G20 223876 G21
LTC2237: 8192 Point 2-Tone FFT, f LTC2237: SNR vs Input Frequency, IN = 21.6MHz and 23.6MHz, LTC2237: Grounded Input –1dB, 2V Range, 40Msps Histogram, 40Msps –1dB, 2V Range, 40Msps
0 70000 65520 62.5 –10 –20 60000 61.5 –30 50000 –40 –50 40000 60.5 –60 COUNT –70 30000 SNR (dBFS) 59.5 AMPLITUDE (dB) –80 20000 –90 58.5 –100 10000 –110 0 0 –120 0 57.5 0 5 10 15 20 510 511 512 0 50 100 150 200 FREQUENCY (MHz) CODE INPUT FREQUENCY (MHz) 223876 G22 223876 G23 223876 G24
LTC2237: SNR and SFDR vs LTC2237: SFDR vs Input Frequency, Sample Rate, 2V Range, LTC2237: SNR vs Input Level, –1dB, 2V Range, 40Msps fIN = 5MHz, –1dB fIN = 5MHz, 2V Range, 40Msps
100 100 80 SFDR 95 70 dBFS 90 60 90 50 80 85 dBc 40 80 SFDR (dBFS) 70 30 75 SNR AND SFDR (dBFS) SNR SNR (dBc AND dBFS) 20 60 70 10 65 50 0 0 50 100 150 200 0 10 20 30 40 50 60 70 80 –60 –50 –40 –30 –20 –10 0 INPUT FREQUENCY (MHz) SAMPLE RATE (Msps) INPUT LEVEL (dBFS) 223876 G25 223876 G26 223876 G27 223876fa 8