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ADC101S021 Fiches technique(PDF) 10 Page - National Semiconductor (TI) |
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ADC101S021 Fiches technique(HTML) 10 Page - National Semiconductor (TI) |
10 / 13 page Applications Information (Continued) 3.0 ADC081S051 TRANSFER FUNCTION The output format of the ADC081S051 is straight binary. Code transitions occur midway between successive integer LSB values. The LSB width for the ADC081S051 is V A/256. The ideal transfer characteristic is shown in Figure 5. The transition from an output code of 0000 0000 to a code of 0000 0001 is at 1/2 LSB, or a voltage of V A/512. Other code transitions occur at steps of one LSB. 4.0 TYPICAL APPLICATION CIRCUIT A typical application of the ADC081S051 is shown in Figure 6. Power is provided in this example by the National Semi- conductor LP2950 low-dropout voltage regulator, available in a variety of fixed and adjustable output voltages. The power supply pin is bypassed with a capacitor network located close to the ADC081S051. Because the reference for the ADC081S051 is the supply voltage, any noise on the supply will degrade device noise performance. To keep noise off the supply, use a dedicated linear regulator for this device, or provide sufficient decoupling from other circuitry to keep noise off the ADC081S051 supply pin. Because of the ADC081S051’s low power requirements, it is also possible to use a precision reference as a power supply to maximize performance. The four-wire interface is also shown con- nected to a microprocessor or DSP. 20145511 FIGURE 5. Ideal Transfer Characteristic 20145513 FIGURE 6. Typical Application Circuit www.national.com 10 |
Numéro de pièce similaire - ADC101S021 |
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Description similaire - ADC101S021 |
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