Datasheet LTC2122 (Analog Devices) - 3

LTC2122
CONVERTER CHARACTERISTICS The
l
denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. (Note 5) PARAMETER CONDITIONS MIN TYP MAX UNITS
Resolution (No Missing Codes) l 14 Bits Integral Linearity Error Differential Analog Input (Note 6) l –5.1 ±1.2 5.1 LSB Differential Linearity Error Differential Analog Input l –0.9 ±0.35 0.9 LSB Offset Error (Note 7) l –13 ±5 13 mV Gain Error Internal Reference ±1.5 %FS External Reference l –4.0 ±1 2.2 %FS Offset Drift ±20 µV/ºC Full-Scale Drift Internal Reference ±30 ppm/ºC External Reference ±10 ppm/ºC Transition Noise 1.82 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 1.2 1.250 1.3 V I + – IN1 Analog Input Leakage Current 0 < AIN , AIN < VDD, No Clock l –1 1 µA IIN2 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–3dB 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. (Note 5) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 15MHz Input 70 dBFS 70MHz Input 69.8 dBFS 140MHz Input l 67.7 69.1 dBFS SFDR Spurious Free Dynamic Range 2nd or 3rd 15MHz Input 90 dBFS Harmonic 70MHz Input 85 dBFS 140MHz Input l 76 80 dBFS Spurious Free Dynamic Range 4th Harmonic 15MHz Input 95 dBFS or Higher 70MHz Input 95 dBFS 140MHz Input l 83 85 dBFS S/(N+D) Signal-to-Noise Plus Distortion Ratio 15MHz Input 69.9 dBFS 70MHz Input 69.4 dBFS 140MHz Input l 67.3 68.5 dBFS Crosstalk Crosstalk Between Channels Up to 250MHz Input –90 dB 2122fb For more information www.linear.com/LTC2122 3 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Converter Characteristics Analog Input Dynamic Accuracy Internal Reference Characteristics Power Requirements Digital Inputs And Outputs Digital Inputs And Outputs Timing characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagram SPI Timing Definitions ADC PERFORMANCE TERMS SERIAL INTERFACE TERMS Applications Information CONVERTER OPERATION INPUT DRIVE CIRCUITS GROUNDING AND BYPASSING HEAT TRANSFER Typical Applications Package Description Revision History Typical Application Related Parts