Datasheet LTC2157-12, LTC2156-12, LTC2155-12 (Analog Devices) - 3

LTC2157-12/ LTC2156-12/LTC2155-12
CONVERTER CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) LTC2157-12 LTC2156-12 LTC2155-12 PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
Resolution (No Missing Codes) l 12 12 12 Bits Integral Linearity Error Differential Analog Input (Note 6) l –2.3 ±0.26 2.3 –2.2 ±0.30 2.2 –1.9 ±0.30 1.9 LSB Differential Linearity Error Differential Analog Input l –0.6 ±0.16 0.8 –0.6 ±0.16 0.6 –0.6 ±0.16 0.6 LSB Offset Error (Note 7) l –13 ±5 13 –13 ±5 13 –13 ±5 13 mV Gain Error External Reference l –4 ±1 2.2 –4 ±1 2.2 –4 ±1 2.2 %FS Offset Drift ±20 ±20 ±20 µV/°C Full-Scale Drift Internal Reference ±30 ±30 ±30 ppm/°C External Reference ±10 ±10 ±10 ppm/°C Transition Noise 0.54 0.54 0.54 LSBRMS
ANALOG INPUT The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V + – IN Analog Input Range (AIN – AIN ) 1.7V < VDD < 1.9V l 1.5 VP-P V + – IN(CM) Analog Input Common Mode (AIN + AIN )/2 Differential Analog Input (Note 8) l VCM – 20mV VCM VCM + 20mV V VSENSE External Voltage Reference Applied to SENSE External Reference Mode l 1.200 1.250 1.300 V I + – IN1 Analog Input Leakage Current 0 < AIN , AIN < VDD, No Encode l –1 1 µA IIN2 PAR/SER Input Leakage Current 0 < PAR/SER < VDD l –1 1 µA IIN3 SENSE Input Leakage Current 1.2V < SENSE < 1.3V l –1 1 µA tAP Sample-and-Hold Acquisition Delay Time 1 ns tJITTER Sample-and-Hold Acquisition Delay Jitter 0.15 psRMS CMRR Analog Input Common Mode Rejection Ratio 75 dB BW-3B Full-Power Bandwidth 1250 MHz
DYNAMIC ACCURACY The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. AIN = –1dBFS. (Note 5) LTC2157-12 LTC2156-12 LTC2155-12 SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 15MHz Input 68.5 68.5 68.5 dBFS 70MHz Input 68.4 68.3 68.3 dBFS 140MHz Input l 66.9 68.0 67.3 67.9 67.4 67.8 dBFS SFDR Spurious Free Dynamic Range 15MHz Input 90.6 90.1 90 dBFS 2nd or 3rd Harmonic 70MHz Input 88 89 88 dBFS 140MHz Input l 71 80 74 81 75 80 dBFS Spurious Free Dynamic Range 15MHz Input 98 98 98 dBFS 4th Harmonic or Higher 70MHz Input 95 95 95 dBFS 140MHz Input l 81 85 82 87 83 88 dBFS S/(N+D) Signal-to-Noise Plus 15MHz Input 68.4 68.4 68.4 dBFS Distortion Ratio 70MHz Input 68.3 68.3 68.3 dBFS 140MHz Input l 66.1 67.7 66.7 67.7 66.8 67.7 dBFS Crosstalk Crosstalk Between Channels Up to 315MHz Input –95 –95 –95 dB 21576512fb For more information www.linear.com/LTC2157-12 3 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Order Information Converter Characteristics Analog Input Dynamic Accuracy Internal Reference Characteristics Power Requirements Digital Inputs And Outputs Timing Characteristics Timing Diagrams Typical Performance Characteristics Pin Functions Functional Block Diagram Applications Information Related Parts