Low Power 1-Bit ADC Array with Serial Output
Microwave interferometers for NASA missions such as PATH and SCLP consist of up to 900 receivers. Each receiver requires I and Q ADCs (analog-to-digital converters) for signal digitizing at >200MHz before further digital processing in the cross-correlators. Power dissipation as well as instrument volume and weight are the most important parameters in space born instruments.
Pacific Microchip proposes designing a monolithic array consisting of 20x1-bit ADCs. A serializer will be integrated to reduce the number of outputs from 20 to 1. This will reduce the power per ADC and resolve the problem of wiring congestion where the cross-correlators interface. For further power reduction, Pacific Microchip proposes integrating a novel metastability programming feature into the ADC latches. The clock distribution will also be dramatically simplified. The 2-wire serial I
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Pacific Microchip Corp.
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