LTC2281 TheCONVERTER CHARACTERISTICS l denotes the specifi cations which apply over the full operatingtemperature range, otherwise specifi cations are at TA = 25°C. (Note 4)PARAMETERCONDITIONSMINTYPMAXUNITS Gain Matching External Reference ±0.3 %FS Offset Matching ±2 mV Transition Noise SENSE = 1V 0.08 LSBRMS ANALOG INPUTThe l denotes the specifi cations which apply over the full operating temperature range, otherwisespecifi cations are at TA = 25°C. (Note 4)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS V + – IN Analog Input Range (AIN –AIN ) 2.85V < VDD < 3.4V (Note 7) ● ±0.5V to ±1V V V + – IN,CM Analog Input Common Mode (AIN +AIN )/2 Differential Input Drive (Note 7) ● 1 1.5 1.9 V Single Ended Input Drive (Note 7) ● 0.5 1.5 2 V I + – IN Analog Input Leakage Current 0V < AIN , AIN < VDD ● –1 1 μA ISENSE SENSEA, SENSEB Input Leakage 0V < SENSEA, SENSEB < 1V ● –3 3 μA IMODE MODE Input Leakage Current 0V < MODE < VDD ● –3 3 μA tAP Sample-and-Hold Acquisition Delay Time 0 ns tJITTER Sample-and-Hold Acquisition Delay Time Jitter 0.2 psRMS CMRR Analog Input Common Mode Rejection Ratio 80 dB Full Power Bandwidth Figure 8 Test Circuit 640 MHz DYNAMIC ACCURACYThe l denotes the specifi cations which apply over the full operating temperature range,otherwise specifi cations are at TA = 25°C. AIN = –1dBFS. (Note 4)SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITS SNR Signal-to-Noise Ratio 5MHz Input 61.6 dB 30MHz Input 61.6 dB 70MHz Input ● 60 61.5 dB 140MHz Input 61.4 dB SFDR Spurious Free Dynamic Range 5MHz Input 85 dB 2nd or 3rd Harmonic 30MHz Input 85 dB 70MHz Input ● 69 82 dB 140MHz Input 77 dB SFDR Spurious Free Dynamic Range 5MHz Input 85 dB 4th Harmonic or Higher 30MHz Input 85 dB 70MHz Input ● 75 85 dB 140MHz Input 85 dB S/(N+D) Signal-to-Noise Plus Distortion Ratio 5MHz Input 61.5 dB 30MHz Input 61.5 dB 70MHz Input ● 60 61.4 dB 140MHz Input 61.2 dB IMD Intermodulation Distortion fIN = 40MHz, 41MHz 80 dB Crosstalk fIN = 100MHz –110 dB 2281fb 3
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