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Overclocking the ADS1240 and ADS1241 (Rev. A)

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Overclocking Procedure. First substitute the faster crystal resonator ... It is recommended to start with the lowest overclocking frequency that the ...

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Overclocking the ADS1240 and ADS1241 (Rev. A)Page 1Application ReportSBAA084A April 2004 Revised July 20041Overclocking the ADS1240 and ADS1241Sean Chuang and Jason BridgmonABSTRACTThe ADS1240 and ADS1241 are precision wide dynamic range deltasigma () AnalogtoDigital Converters (ADCs) with 24bit resolution. These devices are very competitivelypriced. Considering their low speed and low current consumption parameters designers mayfind it advantageous to know that both devices are capable of running considerably fasterwhile maintaining performance at the expense of current consumption. ContentsTheory of Operation2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Overclocking Procedure2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . List of FiguresFigure 1. Input Waveform to Change Current Consumption2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 2. Typical Integral Nonlinearity versus Current Consumption at Various StandardClock Frequencies2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 3. Input Waveform to Reset Current Consumption3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 4. Analog Current Consumption vs Code at 2.4576MHz3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 5. Analog Current Consumption vs Code at 4.9152MHz3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 6. Analog Current Consumption vs Code at 10MHz4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 7. Analog Current Consumption vs Code at 18MHz4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 8. Digital Current Consumption vs Frequency4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . All trade ...

Source: focus.ti.com

 

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