Datasheet LT1993-4 (Analog Devices) - 9

LT1993-4 TYPICAL PERFORMANCE CHARACTERISTICS
Distortion vs Output Common Mode Voltage, LT1993-4 Driving LTC2249 14-Bit ADC Turn-On Time Turn-Off Time
–64 4 4 FILTERED OUTPUTS, NO RLOAD +OUT +OUT VOUT = 70MHz 2VP-P 3 3 –66 2 2 –68 –OUT –OUT 1 1 TION (dBc) –70 TAGE (V) 0 R 0 LOAD = 100Ω PER OUTPUT TAGE (V) HD3 VOL 4 VOL 4 ENABLE DISTOR –72 2 2 –74 HD2 ENABLE 0 0 RLOAD = 100Ω PER OUTPUT –76 –2 –2 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 0 125 250 375 500 625 0 125 250 375 500 625 OUTPUT COMMON MODE VOLTAGE (V) TIME (ns) TIME (ns) 19934 G25
30MHz 8192 Point FFT, LT1993-4 50MHz 8192 Point FFT, LT1993-4 70MHz 8192 Point FFT, LT1993-4 Driving LTC2249 14-Bit ADC Driving LTC2249 14-Bit ADC Driving LTC2249 14-Bit ADC
0 0 0 –10 8192 POINT FFT –10 8192 POINT FFT –10 8192 POINT FFT fIN = 30MHz, –1dBFS fIN = 50MHz, –1dBFS fIN = 70MHz, –1dBFS –20 FILTERED OUTPUTS –20 FILTERED OUTPUTS –20 FILTERED OUTPUTS –30 –30 –30 –40 –40 –40 –50 –50 –50 –60 –60 –60 –70 –70 –70 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 –90 –90 –90 –100 –100 –100 –110 –110 –110 –120 –120 –120 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 40 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) 19934 G28 19934 G29 19934 G30
70MHz 2-Tone 32768 Point FFT 2-Tone WCDMA Waveform 4-Tone WCDMA Waveform LT1993-4 Driving LTC2249 LT1993-4 Driving LTC2255 LT1993-4 Driving LTC2255 14-Bit ADC 14-Bit ADC at 92.16Msps 14-Bit ADC at 92.16Msps
0 0 0 –10 32768 POINT FFT –10 32768 POINT FFT –10 32768 POINT FFT TONE 1 AT 69.5MHz, –7dBFS TONE CENTER FREQUENCIES TONE CENTER FREQUENCIES –20 TONE 2 AT 70.5MHz, –7dBFS –20 AT 67.5MHz, 72.5MHz –20 AT 62.5MHz, 67.5MHz, 72.5MHz, 77.5MHz –30 FILTERED OUTPUTS –30 –30 –40 –40 –40 –50 –50 –50 –60 –60 –60 –70 –70 –70 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 AMPLITUDE (dBFS) –80 –90 –90 –90 –100 –100 –100 –110 –110 –110 –120 –120 –120 0 5 10 15 20 25 30 35 40 0 5 10 15 20 25 30 35 40 45 0 5 10 15 20 25 30 35 40 45 FREQUENCY (MHz) FREQUENCY (MHz) FREQUENCY (MHz) 19934 G31 19934 G32 19934 G33 Rev B For more information www.analog.com 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information DC Electrical Characteristics AC Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Application Package Description Revision History Typical Application Related Parts