Datasheet LTC2258-12, LTC2257-12, LTC2256-12 (Analog Devices) - 4

LTC2258-12 LTC2257-12/LTC2256-12
a nalog 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 to 2 VP-P V + – IN(CM) Analog Input Common Mode (AIN + AIN )/2 Differential Analog Input (Note 8) l VCM – 100mV VCM VCM + 100mV V VSENSE External Voltage Reference Applied to SENSE External Reference Mode l 0.625 1.250 1.300 V IINCM Analog Input Common Mode Current Per Pin, 65Msps 81 µA Per Pin, 40Msps 50 µA Per Pin, 25Msps 31 µA 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 –3 3 µA IIN3 SENSE Input Leakage Current 0.625V < SENSE < 1.3V l –6 6 µA tAP Sample-and-Hold Acquisition Delay Time 0 ns tJITTER Sample-and-Hold Acquisition Delay Jitter 0.17 psRMS CMRR Analog Input Common Mode Rejection Ratio 80 dB BW-3B Full-Power Bandwidth Figure 6 Test Circuit 800 MHz
Dyna Mic 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) LTC2258-12 LTC2257-12 LTC2256-12 SYMBOL PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX MIN TYP MAX UNITS
SNR Signal-to-Noise Ratio 5MHz Input 71.1 70.8 70.5 dB 30MHz l 69 71 69.6 70.7 69 70.5 dB 70MHz Input 70.9 70.6 70.1 dB 140MHz Input 70.7 70.4 69.9 dB SFDR Spurious Free Dynamic Range 5MHz Input 90 90 90 dB 2nd or 3rd Harmonic 30MHz l 78 90 79 90 79 90 dB 70MHz Input 90 90 90 dB 140MHz Input 84 84 84 dB Spurious Free Dynamic Range 5MHz Input 90 90 90 dB 4th Harmonic or Higher 30MHz l 83 90 83 90 83 90 dB 70MHz Input 90 90 90 dB 140MHz Input 90 90 84 dB S/(N+D) Signal-to-Noise Plus 5MHz Input 71 70.7 70.5 dB Distortion Ratio 30MHz l 69.1 71 68.9 70.6 68.3 70.4 dB 70MHz Input 70.9 70.6 70 DB 140MHz Input 70.3 70.2 69.5 dB
i nTernal reFerence 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
VCM Output Voltage IOUT = 0 0.5 • VDD – 25mV 0.5 • VDD 0.5 • VDD + 25mV V VCM Output Temperature Drift ±25 ppm/°C VCM Output Resistance –600µA < IOUT < 1mA 4 Ω VREF Output Voltage IOUT = 0 1.225 1.250 1.275 V VREF Output Temperature Drift ±25 ppm/°C VREF Output Resistance –400µA < IOUT < 1mA 7 Ω VREF Line Regulation 1.7V < VDD < 1.9V 0.6 mV/V 225812fd 4 For more information www.linear.com/LTC2258-12 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configurations Order Information Converter Characteristics Analog Input Dynamic Accuracy Internal Reference Characteristics Digital Inputs And Outputs Power Requirements Timing Characteristics Timing Diagrams Typical Performance Characteristics Pin Functions Functional Block Diagram Applications Information Typical Applications Package Description Revision History Related Parts