Datasheet LTC1274, LTC1277 (Analog Devices) - 6

LTC1274/LTC1277
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 fSAMPLE = 100kHz 70 VIN = 0dB 70 –20 60 60 VIN = – 20dB –40 50 50 40 40 –60 2ND HARMONIC 30 30 DISTORTION (dB) –80 THD 20 V 20 IN = – 60dB 3RD HARMONIC SIGNAL-TO-NOISE RATIO (dB) –100 SIGNAL/(NOISE + DISTORTION)(dB) 10 10 fSAMPLE = 100kHz fSAMPLE = 100kHz 0 0 –120 10k 100k 1M 2M 10k 100k 1M 2M 10k 100k 1M 2M INPUT FREQUENCY (Hz) INPUT FREQUENCY (Hz) INPUT FREQUENCY (Hz) LTC1274/77 • TPC04 LTC1274/77 • TPC05 LTC1274/77 • TPC06
Spurious-Free Dynamic Range vs Input Frequency Intermodulation Distortion Plot
0 0 f fSAMPLE = 100kHz –10 SAMPLE = 100kHz fa = 9.54kHz –20 fb = 9.79kHz –20 –30 –40 –40 –50 –60 fb – fa fb – fa 2fa –60 – fb 2fa 3fa AMPLITUDE (dB) –80 2fb – fa fa + 2fb –70 2fa – fb 2fb 3fb –80 –100 SPURIOUS-FREE DYNAMIC RANGE (dB) –90 –100 –120 10k 100k 1M 2M 0 10 20 30 40 50 INPUT FREQUENCY (Hz) FREQUENCY (kHz) LTC1274/77 • TPC07 LTC1274/77 • TPC08
Acquistion Time vs Intermodulation Distortion Plot Source Impedance
0 3.5 fa fb fSAMPLE = 100kHz TA = 25°C fb – fa fa = 96.948kHz 3.0 –20 fb = 97.681kHz 2fb – fa 2fa – fb µs) 2.5 –40 2fb fa + fb 2fa 2.0 –60 3fb 2fb + fa 1.5 2fa + fb AMPLITUDE (dB) –80 3fa ACQUISITION TIME ( 1.0 –100 0.5 –120 0 0 10k 20k 30k 40k 50k 10 100 1k 10k FREQUENCY (Hz) SOURCE RESISTANCE (Ω) LTC1274/77 • TPC09 LTC1274/75 • TPC10 6