LTC2228/LTC2227/LTC2226 CONVERTER CHARACTERISTICSThe l denotes the specifi cations which apply over the full operatingtemperature range, otherwise specifi cations are at TA = 25°C. (Note 4)LTC2228LTC2227LTC2226PARAMETERCONDITIONSMINTYPMAXMINTYPMAXMINTYPMAXUNITS Resolution l 12 12 12 Bits (No Missing Codes) Integral Differential Analog Input (Note 5) l –1.1 ±0.3 1.1 –1 ±0.3 1 –1 ±0.3 1 LSB Linearity Error Differential Differential Analog Input l –0.8 ±0.15 0.8 –0.7 ±0.15 0.7 –0.7 ±0.15 0.7 LSB Linearity Error Offset Error (Note 6) l –12 ±2 12 –12 ±2 12 –12 ±2 12 mV Gain Error External Reference l –2.5 ±0.5 2.5 –2.5 ±0.5 2.5 –2.5 ±0.5 2.5 %FS Offset Drift ±10 ±10 ±10 μV/°C Full-Scale Drift Internal Reference ±30 ±30 ±30 ppm/°C External Reference ±5 ±5 ±5 ppm/°C Transition Noise SENSE = 1V 0.25 0.25 0.25 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 ) 2.7V < VDD < 3.4V (Note 7) l ±0.5V to ±1V V V + – IN,CM Analog Input Common Mode (AIN + AIN )/2 Differential Input (Note 7) l 1 1.5 1.9 V Single-Ended Input (Note 7) l 0.5 1.5 2 V I + – IN Analog Input Leakage Current 0V < AIN , AIN < VDD l –1 1 μA ISENSE SENSE Input Leakage 0V < SENSE < 1V l –3 3 μA IMODE MODE Pin Leakage l –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 575 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)LTC2228LTC2227LTC2226SYMBOL PARAMETERCONDITIONSMINTYPMAXMINTYPMAXMINTYPMAXUNITS SNR Signal-to-Noise Ratio 5MHz Input 71.3 71.4 71.4 dB 12.5MHz Input l 70.2 71.2 dB 20MHz Input l 70.1 71.3 dB 30MHz Input l 70 71.3 dB 70MHz Input 71.3 71.1 70.9 dB 140MHz Input 71 70.7 70.6 dB SFDR Spurious Free 5MHz Input 90 90 90 dB Dynamic Range 12.5MHz Input l 76 90 dB 2nd or 3rd Harmonic 20MHz Input l 76 90 dB 30MHz Input l 75 90 dB 70MHz Input 85 85 85 dB 140MHz Input 80 80 80 dB 222876fb 3
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