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ADC128S022EVAL Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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ADC128S022EVAL Datasheet(HTML) 4 Page - National Semiconductor (TI) |
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4 / 18 page  ADC128S022 Converter Electrical Characteristics (Note 8) (Continued) The following specifications apply for AGND = DGND = 0V, f SCLK = 0.8 MHz to 3.2 MHz, fSAMPLE = 50 kSPS to 200 kSPS, CL = 50pF, unless otherwise noted. Boldface limits apply for T A =TMIN to TMAX: all other limits TA = 25˚C. Symbol Parameter Conditions Typical Limits (Note 7) Units DYNAMIC CONVERTER CHARACTERISTICS THD Total Harmonic Distortion V A =VD = +3.0V, f IN = 39.9 kHz, −0.02 dBFS −89 −74 dB (max) V A =VD = +5.0V, f IN = 39.9 kHz, −0.02 dBFS −90 −74 dB (max) SFDR Spurious-Free Dynamic Range V A =VD = +3.0V, f IN = 39.9 kHz, −0.02 dBFS 91 75 dB (min) V A =VD = +5.0V, f IN = 39.9 kHz, −0.02 dBFS 91 75 dB (min) ENOB Effective Number of Bits V A =VD = +3.0V, f IN = 39.9 kHz 11.8 11.3 Bits (min) V A =VD = +5.0V, f IN = 39.9 kHz, −0.02 dBFS 11.8 11.3 Bits (min) ISO Channel-to-Channel Isolation V A =VD = +3.0V, f IN =20kHz 81 dB V A =VD = +5.0V, f IN = 20 kHz, −0.02 dBFS 80 dB IMD Intermodulation Distortion, Second Order Terms V A =VD = +3.0V, f a = 19.5 kHz, fb = 20.5 kHz −97 dB V A =VD = +5.0V, f a = 19.5 kHz, fb = 20.5 kHz −94 dB Intermodulation Distortion, Third Order Terms V A =VD = +3.0V, f a = 19.5 kHz, fb = 20.5 kHz −88 dB V A =VD = +5.0V, f a = 19.5 kHz, fb = 20.5 kHz −88 dB ANALOG INPUT CHARACTERISTICS V IN Input Range 0 to V A V I DCL DC Leakage Current ±1 µA (max) C INA Input Capacitance Track Mode 33 pF Hold Mode 3 pF DIGITAL INPUT CHARACTERISTICS V IH Input High Voltage V A =VD = +2.7V to +3.6V 2.1 V (min) V A =VD = +4.75V to +5.25V 2.4 V (min) V IL Input Low Voltage V A =VD = +2.7V to +5.25V 0.8 V (max) I IN Input Current V IN =0VorVD ±0.01 ±1 µA (max) C IND Digital Input Capacitance 2 4 pF (max) www.national.com 4 |
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