Low Power 2-Bit ADC Array with Serial Output

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNX11CB15C
Agency Tracking Number: 094998
Amount: $599,973.00
Phase: Phase II
Program: SBIR
Awards Year: 2011
Solicitation Year: 2009
Solicitation Topic Code: S1.03
Solicitation Number: N/A
Small Business Information
CA, Culver City, CA, 90230-4650
DUNS: 831566877
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Dalius Baranauskas
 Principal Investigator
 (310) 940-3083
 dalius@pacificmicrochip.com
Business Contact
 Dalius Baranauskas
Title: Business Official
Phone: (310) 940-3083
Email: dalius@pacificmicrochip.com
Research Institution
 Stub
Abstract
Microwave interferometers for NASA missions such as PATH employ the GeoSTAR instrument, consisting of 600 receivers. Each receiver requires I and Q ADCs (analog-to-digital converters) for signal digitizing at 1GHz before further processing in the cross-correlators. Power consumption as well as instrument volume and weight are critical in space born instruments. During Phase I, Pacific Microchip Corp. designed the block diagrams and circuits of a monolithic array consisting of sixteen 2-bit ADCs. A serializer is integrated to reduce the number of outputs from 32 to 1. This reduces the power consumption per ADC and resolves the problem of wiring congestion in the interface with cross-correlators. For further power reduction, a novel metastability programming feature is integrated into the ADC latches. The clock distribution is fundamentally simplified as well. The 2-wire serial I2C (Inter-Integrated Circuit) interface allows all 1200 ADCs of the GeoSTAR instrument to be calibrated and optimized. Phase I work provided a complete definition and in silico validation of the monolithic ADC array with serial output. Phase II of the project will produce a fieldable product. In order to facilitate the commercialization efforts in Phase III, a Complementary Metal-Oxide-Semiconductor (CMOS) Silicon-on-Isolator (SOI) technology will be used for fabrication.

* Information listed above is at the time of submission. *

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