A_D_converter_for_nonratiometric_transducer_inputs

Published:2009/7/23 0:56:00 Author:Jessie | From:SeekIC

This circuit converts the output from 8 nonratiometric or absolute transducers to an 8-bit digital word using an ADC0808/0809, under control of a CPU or similar digital logic. The timing and internal functions shown in Fig. 6-13B and 6-13C also apply to this circuit. The LM336-5 acts as both a regulator and reference (for a 5-V or larger supply). Dropping resistor R is chosen so that, for the whole range of supply currents needed by the system (not just the ADC), the LM336-5 will stay in regulation. Again, use separate supply and reference traces to minimize noise.



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