Datasheet LTC1748 (Analog Devices) - 8

LTC1748
W U TYPICAL PERFOR A CE CHARACTERISTICS SFDR vs Input Frequency and SFDR vs Input Frequency and Amplitude, 3.2V Range, Amplitude, 2V Range, 2nd and 3rd Harmonic 2nd and 3rd Harmonic Shorted Input Histogram
100 100 18000 T T A = 25°C –20dB A = 25°C –20dB TA = 25°C 95 95 16000 –10dB –10dB 14000 90 90 –6dB –6dB 12000 85 85 –1dB 10000 80 80 –1dB COUNT 8000 SFDR (dBFS) 75 SFDR (dBFS) 75 6000 70 70 4000 65 65 2000 60 60 0 0 20 40 60 80 100 0 20 40 60 80 100 8147 8148 8149 8150 8151 8152 8153 INPUT FREQUENCY (MHz) INPUT FREQUENCY (MHz) CODE 1748 G25 1748 G26 1748 G27
SNR vs Input Frequency SNR vs Input Level and Frequency SFDR vs Sample Rate, 5MHz Input, 3.2V Range 3.2V Range –1dB, 3.2V Range
78.0 77.0 100 TA = 25°C TA = 25°C TA = 25°C 77.5 76.8 95 76.6 77.0 90 76.4 76.5 85 76.2 76.0 80 76.0 SNR (dBFS) 75.5 SNR (dBFS) SFDR (dBFS) 75 75.8 75.0 70 75.6 15MHz 30MHz 74.5 75.4 50MHz 65 70MHz 74.0 75.2 60 0 20 40 60 80 100 –80 –60 –40 –20 0 0 20 40 60 80 100 INPUT FREQUENCY (MHz) INPUT LEVEL SAMPLE RATE (Msps) 1748 G28 1748 G29 1748 G30
SNR vs Sample Rate, 5MHz Input, High Input Frequency SFDR, High Input Frequency SNR, –1dB, 3.2V Range –1dB, 2V Range –1dB, 2V Range
78 100 73.0 TA = 25°C 4TH OR HIGHER HARMONIC 95 72.5 77 90 72.0 76 71.5 85 71.0 75 80 70.5 SNR (dBFS) SFDR (dBFS) 75 SNR (dBFS) 74 2ND OR 3RD HARMONIC 70.0 70 69.5 73 65 69.0 72 60 68.5 0 20 40 60 80 100 0 50 100 150 200 250 0 50 100 150 200 250 SAMPLE RATE (Msps) INPUT FREQUENCY (MHz) INPUT FREQUENCY (MHz) 1748 G31 1748 G33 1748 G34 1748fa 8