Datasheet LTC1744 (Analog Devices) - 7

LTC1744
W U TYPICAL PERFOR A CE CHARACTERISTICS (Note 5) Averaged, 8192 Point FFT, Input Averaged, 8192 Point FFT, Input Averaged, 8192 Point FFT, Input Frequency = 51MHz, – 20dB, Frequency = 70MHz, – 1dB, Frequency = 70MHz, – 6dB, 2V Range 2V Range 2V Range
0.5 0.5 T 0.5 A = 25°C T T A = 25°C A = 25°C –10.0 –10.0 –10.0 –20.0 –20.0 –20.0 –30.0 –30.0 –30.0 –40.0 –40.0 –40.0 –50.0 –50.0 –50.0 –60.0 –60.0 –60.0 –70.0 –70.0 –70.0 AMPLITUDE (dBFS) –80.0 –80.0 AMPLITUDE (dBFS) –80.0 AMPLITUDE (dBFS) –90.0 –90.0 –90.0 –100.0 –100.0 –100.0 –110.0 –110.0 –110.0 –120.0 –120.0 –120.0 0 2 4 6 8 10 12 14 16 18 20 22 24 0 2 4 6 8 10 12 14 16 18 20 22 24 0 2 4 6 8 10 12 14 16 18 20 22 24 FREQUENCY (MHz) 25.37 FREQUENCY (MHz) 25.37 FREQUENCY (MHz) 25.37 1744 G20 1744 G21 1744 G22
Averaged, 8192 Point FFT, Input Frequency = 70MHz, – 20dB, SNR vs Sample Rate, Input 2V Range Grounded Input Histogram Frequency = 5MHz, –1dB
0.5 40000 78 TA = 25°C T T A = 25°C A = 25°C –10.0 77 35000 –20.0 3.2V RANGE 76 –30.0 30000 75 –40.0 25000 2V RANGE –50.0 74 –60.0 20000 73 COUNT –70.0 SNR (dBFS) 72 15000 AMPLITUDE (dBFS) –80.0 71 –90.0 10000 70 –100.0 5000 –110.0 69 –120.0 0 68 0 2 4 6 8 10 12 14 16 18 20 22 24 8152 8153 8154 8155 8156 8157 8158 0 20 40 60 80 100 FREQUENCY (MHz) 25.37 CODE SAMPLE RATE (Msps) 1744 G23 1744 G09 1744 G24
SFDR vs Sample Rate, Input SNR vs Input Frequency and SNR vs Input Frequency and Frequency = 5MHz, –1dB Amplitude, 3.2V Range Amplitude, 2V Range
100 80 75 TA = 25°C TA = 25°C –1dBFS TA = 25°C 95 –1dBFS 75 90 70 2V RANGE – 6dBFS 85 3.2V RANGE 70 – 6dBFS 80 65 75 65 SFDR (dBc) 70 SNR (dBc) SNR (dBc) 60 TA = 25°C 60 65 60 – 20dBFS 55 55 55 – 20dBFS 50 50 50 0 20 40 60 80 100 1 10 100 1 10 100 SAMPLE RATE (Msps) INPUT FREQUENCY (MHz) INPUT FREQUENCY (MHz) 1744 G25 1744 G31 1744 G30 1744f 7