Datasheet LTC1279 (Analog Devices) - 6

LTC1279
W U TYPICAL PERFORMANCE CHARACTERISTICS S/(N + D) vs Input Frequency Signal-to-Noise Ratio (Without and Amplitude Harmonics) vs Input Frequency Distortion vs Input Frequency
80 80 0 VIN = 0dB fSAMPLE = 600kHz 70 –10 70 –20 60 60 VIN = –20dB –30 50 50 –40 40 40 –50 30 –60 30 –70 20 20 2ND HARMONIC VIN = –60dB SIGNAL-TO-NOISE RATIO (dB) –80 THD SIGNAL/(NOISE + DISTORTION) (dB) 10 3RD HARMONIC 10 f –90 SAMPLE = 600kHz fSAMPLE = 600kHz 0 AMPLITUDE (dB BELOW THE FUNDAMENTAL) 0 –100 10k 100k 1M 10M 10k 100k 1M 10M 10k 100k 1M 2M INPUT FREQUENCY (Hz) INPUT FREQUENCY (Hz) INPUT FREQUENCY (Hz) 1279 G04 1279 G05 1279 G06
Peak Harmonic or Spurious Acquisition Time vs Noise vs Input Frequency Intermodulation Distortion Plot Source Impedance
0 0 2500 (fa) (fb) T f A = 25°C –10 fSAMPLE = 600kHz –10 SAMPLE = 600kHz fa = 94.189kHz –20 –20 fb = 97.705kHz 2000 –30 –30 –40 –40 1500 –50 (3fb) –50 –60 (fa + 2fb) –60 –70 (2fa – fb) (2fb – fa) (fa + fb)(2fa + fb) 1000 AMPLITUDE (dB) –80 (fb – fa) –70 (2fa) (2fb) ACQUISITION TIME (ns) –90 (3fa) –80 500 –100 SPURIOUS-FREE DYNAMIC RANGE (dB) –90 –110 –100 –120 0 10k 100k 1M 2M 0 50 100 150 200 250 300 10 100 1k 10k INPUT FREQUENCY (Hz) FREQUENCY (kHz) SOURCE RESISTANCE (Ω) 1279 G07 1279 G09 1279 G08
Power Supply Feedthrough vs Reference Voltage vs Supply Current vs Temperature Ripple Frequency Load Current
15 0 2.435 fSAMPLE = 600kHz 2.430 –20 12 2.425 (mA) DD –40 2.420 9 2.415 V –60 SS(VRIPPLE = 10mV) DGND(V 2.410 6 RIPPLE = 100mV) AMPLITUDE OF –80 2.405 REFERENCE VOLTAGE (V) SUPPLY CURRENT, I 3 2.400 –100 POWER SUPPLY FEEDTHROUGH (dB) AVDD(VRIPPLE = 1mV) 2.395 fSAMPLE = 600kHz 0 –120 2.390 –55 –25 0 25 50 75 100 125 1k 10k 100k 1M –8 –7 – 6 –5 –4 –3 –2 –1 0 1 2 TEMPERATURE (°C) RIPPLE FREQUENCY (Hz) LOAD CURRENT (mA) 1279 G10 1279 G11 1279 G12 6