To profit from the application-benefits of both 13.56MHz HF RFID systems typically used in identification and 860 to 960MHz UHF RFID systems used in supply chain applications, two frequency selective tags or one broadband chip with one antenna are necessary. Because of the big frequency step between HF and UHF modes, the tag will operate once in a close-coupled magnetic field, at a minimum field strength of 50mA/m, and in UHF typically in far-field, down to 57μW (-12.5dBm). This paper presents a broadband analog interface in 0.12μm CMOS without a Schottky Diode process-option, which powers the chip from 1MHz to 2.45GHz and communicates with EPC UHF and HF.