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Dynamic Performance Requirements for High-Performance ADCs and RF Components in Digital Receiver Applications



Abstract: Today's basestation systems (BTS) have to meet a variety of different standards and must fulfill critical specifications in various blocks of the signal chain. The following paper identifies these demands in signal chain components such as high dynamic performance ADCs, variable gain amplifiers, mixers and local oscillators and details their use in a typical BTS application and how they meet the stringent requirements for high dynamic performance, high intercept performance and low noise. Demanding requirements are placed on high-performance analog-to-digital converters (ADCs) and analog components in most digital receivers. In cellular base station digital receivers for example, sufficient dynamic range is needed to handle high-level interferers (or blockers) while properly demodulating the lower level desired signal. Maxim's MAX1418 15-bit 65Msps or MAX1211 12-bit 65Msps ADC, in combination with the MAX9993 2GHz or MAX9982 900MHz integrated mixers, provide exceptional dynamic range for two of the most critical stages in a receiver line-up. In addition, Maxim's MAX2027 and the MAX2055 IF digital variable gain amplifiers (DVGAs) provide exceptionally high third order output intercept performance (OIP3) with the required gain adjustment range for many applications. A cellular base station (BTS: Base Transceiver Station) consists of many different hardware modules including one that performs the RF receiver (Rx) and transmitter (Tx) functionality- namely a transceiver (TRx). In th

Topics: high-speed ADC, high-speed analog-to-digital converter, high dynamic performance, RF receiver
Year: 2004
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