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LM12454CIV Datasheet(PDF) 6 Page - National Semiconductor (TI) |
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LM12454CIV Datasheet(HTML) 6 Page - National Semiconductor (TI) |
6 / 43 page Converter AC Characteristics (Notes 6, 7, 8, 9, 19) (Continued) The following specifications apply to the LM12454, LM12458, and LM12H458 for V A+ = VD+ = 5V, VREF+ = 5V, VREF− = 0V, 12-bit + sign conversion mode, f CLK = 8.0 MHz (LM12H458) or fCLK = 5.0 MHz (LM12454/8), RS = 25Ω, source impedance for V REF+ and VREF− ≤ 25Ω, fully-differential input with fixed 2.5V common-mode voltage, and minimum acquisition time unless otherwise specified. Boldface limits apply for T A = TJ = TMIN to TMAX; all other limits TA = TJ = 25˚C. Symbol Parameter Conditions Typical Limits Unit (Note 10) (Note 11) (Limit) DSNR Differential Signal-to-Noise Ratio V IN = ±5V f IN = 1 kHz 77.5 dB f IN = 20 kHz 75.2 dB f IN = 40 kHz 74.7 dB SESNR Single-Ended Signal-to-Noise V IN = 5Vp-p Ratio f IN = 1 kHz 69.8 dB f IN = 20 kHz 69.2 dB f IN = 40 kHz 66.6 dB DSINAD Differential Signal-to-Noise + V IN = ±5V Distortion Ratio f IN = 1 kHz 76.9 dB f IN = 20 kHz 73.9 dB f IN = 40 kHz 70.7 dB SESINAD Single-Ended Signal-to-Noise + V IN = 5Vp-p Distortion Ratio f IN = 1 kHz 69.4 dB f IN = 20 kHz 68.3 dB f IN = 40 kHz 65.7 dB DTHD Differential Total Harmonic V IN = ±5V Distortion f IN = 1 kHz −85.8 dB f IN = 20 kHz −79.9 dB f IN = 40 kHz −72.9 dB SETHD Single-Ended Total Harmonic V IN = 5Vp-p Distortion f IN = 1 kHz −80.3 dB f IN = 20 kHz −75.6 dB f IN = 40 kHz −72.8 dB DENOB Differential Effective Number V IN = ±5V of Bits f IN = 1 kHz 12.6 Bits f IN = 20 kHz 12.2 Bits f IN = 40 kHz 12.1 Bits SEENOB Single-Ended Effective Number V IN = 5Vp-p of Bits f IN = 1 kHz 11.3 Bits f IN = 20 kHz 11.2 Bits f IN = 40 kHz 10.8 Bits DSFDR Differential Spurious Free V IN = ±5V Dynamic Range f IN = 1 kHz 87.2 dB f IN = 20 kHz 78.9 dB f IN = 40 kHz 72.8 dB Multiplexer Channel-to-Channel V IN = 5VPP Crosstalk f IN = 40 kHz LM12454 MUXOUT Only −76 dB LM12(H)458 MUX −78 dB plus Converter t PU Power-Up Time 10 ms t WU Wake-Up Time 10 ms www.national.com 6 |
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