A/D converter system with interface and passive voltage referenc

Details A/D converter system with interface and passive voltage referenc A/D converter system with interface and passive voltage referenc

1993-05-28

1994-10-25

Hoff, Marc S.

Coded data generation or conversion

Analog to or from digital conversion

Nonlinear

341141, 307566, H03M 118

Patent

active

053593278

ABSTRACT:
An A/D circuit to convert an analog signal to a digital signal. The circuit includes a low noise analog-to-digital conversion chip and a precision voltage reference source. The voltage reference source includes a diode with two terminals and a passive attenuation circuit. The attenuation circuit and the diode are coupled in parallel between the two terminals to provide a voltage reference signal for use by the analog to digital conversion chip. The analog to digital chip uses the voltage reference signal to set the full scale input range for the signal conversion, and the voltage reference signal is attenuated to correspond to the full scale range of the analog signal.

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Maxim, .+-.18-Bit ADC with Serial Interface Max 132 Manual, May 1992.
Maxim, .+-.18-Bit ADC with Serial Interface Max 132 EV Kit Manual, Jul. 1992.

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