A long-range RFID IC with on-chip ADC in 0.25 /spl mu/m CMOS

摘要

This 1 mm/sup 2/ wireless telemetry device recovers power and a reference clock from a 450 MHz incident RF signal and returns data as a binary phase shift keyed signal on a 900 MHz carrier. The device generates a 3 V/sub DC/ supply from the -12.3 dBm incident RF signal. This corresponds to an operating distance of more than 18 meters in the US. The transmit data includes the output of an on-chip 5-bit single-slope analog-to-digital converter (ADC) and a 3-bit ID tag. The entire IC dissipates 4mW while active.