Datasheet LTC2255, LTC2254 (Analog Devices) - 7

LTC2255/LTC2254
W U TYPICAL PERFOR A CE CHARACTERISTICS LTC2255: SNR and SFDR vs LTC2255: SFDR vs Input Frequency, Sample Rate, 2V Range, LTC2255: SNR vs Input Level, –1dB, 2V Range, 125Msps fIN = 5MHz, –1dB fIN = 70MHz, 2V Range, 125Msps
100 90 80 dBFS SFDR 95 70 80 60 90 SNR 50 85 dBc 70 40 80 SFDR (dBRS) 30 75 SNR AND SFDR (dBFS) SNR (dBc AND dBFS) 60 20 70 10 65 50 0 0 50 100 150 200 250 300 350 0 20 40 60 80 100 120 140 160 –70 –60 –50 –40 –30 –20 –10 0 INPUT FREQUENCY (MHz) SAMPLE RATE (Msps) 22554 G10 22554 G11 INPUT LEVEL (dBFS) 22554 G13
LTC2255: SFDR vs Input Level, LTC2255: IVDD vs Sample Rate, fIN = 70MHz, 2V Range, 125Msps 5MHz Sine Wave Input, –1dB
110 145 100 140 dBFS 90 135 80 130 70 125 60 2V RANGE dBc (mA) 120 50 1V RANGE I VDD 115 40 SFDR (dBc AND dBFS) 110 30 20 105 10 100 0 95 –80 –70 –60 –50 –40 –30 –20 –10 0 0 20 40 60 80 100 120 140 INPUT LEVEL (dBFS) 22554 G14 SAMPLE RATE (Msps) 22554 G15
LTC2255: IOVDD vs Sample Rate, 5MHz Sine Wave Input, –1dB, LTC2255: SNR vs SENSE, OVDD = 1.8V fIN = 5MHz, –1dB
8 74 73 7 72 6 71 5 70 (mA) 4 69 I OVDD 68 3 SNR (dBFS) 67 2 66 1 65 0 64 0 20 40 60 80 100 120 140 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 SAMPLE RATE (Msps) 22554 G16 SENSE PIN (V) 22554 G32 22554fa 7