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ADC081000 Datasheet(PDF) 7 Page - National Semiconductor (TI) |
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ADC081000 Datasheet(HTML) 7 Page - National Semiconductor (TI) |
7 / 29 page Converter Electrical Characteristics (Continued) The following specifications apply after calibration for V A =VDR = +1.9VDC, OutV = 1.9V, VIN FSR (a.c. coupled) = differential 800mV P-P,CL = 10 pF, Differential, a.c. coupled Sinewave Clock, fCLK = 1 GHz at 0.5VP-P with 50% duty cycle, REXT = 3300 Ω ± 0.1%, Analog Signal Source Impedance = 100 Ω. Boldface limits apply for T A =TMIN to TMAX. All other limits TA = 25˚C, unless otherwise stated. (Notes 6, 7) Symbol Parameter Conditions Typical (Note 8) Limits (Note 8) Units (Limits) STATIC CONVERTER CHARACTERISTICS THD Total Harmonic Distortion f IN = 100 MHz, VIN = FSR − 0.5 dB -57 dB f IN = 248 MHz, VIN = FSR − 0.5 dB -57 −50 dB (max) f IN = 498 MHz, VIN = FSR − 0.5 dB -57 −50 dB (max) 2nd Harm Second Harmonic Distortion f IN = 100 MHz, VIN = FSR − 0.5 dB −64 dB f IN = 248 MHz, VIN = FSR − 0.5 dB −64 dB f IN = 498 MHz, VIN = FSR − 0.5 dB −64 dB 3rd Harm Third Harmonic Distortion f IN = 100 MHz, VIN = FSR − 0.5 dB −64 dB f IN = 248 MHz, VIN = FSR − 0.5 dB −64 dB f IN = 498 MHz, VIN = FSR − 0.5 dB −64 dB SFDR Spurious-Free dynamic Range f IN = 100 MHz, VIN = FSR − 0.5 dB 58.5 dB f IN = 248 MHz, VIN = FSR − 0.5 dB 58.5 50 dB (min) f IN = 498 MHz, VIN = FSR − 0.5 dB 58.5 50 dB (min) IMD Intermodulation Distortion f IN1 = 121 MHz, VIN =FSR−7dB f IN2 = 126 MHz, VIN =FSR−7dB -51 dB Out of Range Output Code (In addition to OR Output high) (V IN+)−(VIN−) > + Full Scale 255 (V IN+)−(VIN−) < − Full Scale 0 ANALOG INPUT AND REFERENCE CHARACTERISTICS V IN Full Scale Analog Differential Input Range FSR pin Low 600 550 mV P-P (min) 650 mV P-P (max) FSR pin High 800 750 mV P-P (min) 850 mV P-P (max) V CMI Common Mode Analog Input Voltage V CMO V CMO −50 V CMO+50 mV (min) mV (max) C IN Analog Input Capacitance (Note 10) Differential 0.02 pF Each input to ground 1.6 pF R IN Differential Input Resistance 100 94 Ω (min) 106 Ω (max) ANALOG OUTPUT CHARACTERISTICS V CMO Common Mode Output Voltage I CMO = ±1 µA 1.21 0.95 1.45 V (min) V (max) TC V CMO Common Mode Output Voltage Temperature Coefficient T A = −40˚C to +85˚C 118 ppm/˚C V BG Bandgap Reference Output Voltage I BG = ±100 µA 1.26 1.22 1.33 V (min) V (max) TC V BG Bandgap Reference Voltage Temperature Coefficient T A = −40˚C to +85˚C, I BG = ±100 µA -28 ppm/˚C CLOCK INPUT CHARACTERISTICS V ID Differential Clock Input Level Square Wave Clock 0.6 0.4 2.0 V P-P (min) V P-P (max) Sine Wave Clock 0.6 0.4 2.0 V P-P (min) V P-P (max) I I Input Current V IN =0VorVIN =VA ±1µA C IN Input Capacitance (Note 10) Differential 0.02 pF Each Input to Ground 1.5 pF www.national.com 7 |
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