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DESCRIPTION

The SA631 is a combined low-noise BiCMOS amplifier, and mixer designed for high-performance low-power communication systems from 800-1000MHz. The low-noise preamplifier has a 1.7dB noise figure at 881MHz with 15dB gain and an IP3 intercept of –7dBm at the input. The gain is stabilized by on-chip compensation to vary less than ±0.2dB over –40 to +85°C temperature range. The wide-dynamic-range mixer has a 10dB noise figure and IP3 of +3.3dBm at the input at 881MHz. The nominal current drawn from a single 3V supply is 8.3mA. Additionally, the entire circuit can be powered down to further reduce the supply current to less than 20μA.

FEATURES

? Low current consumption

? Outstanding gain and noise figure

? Excellent gain stability versus temperature and supply voltage

? LNA and mixer power down capability

? Designed in Philips state of the art BiCMOS QUBIC process

APPLICATIONS

? 900MHz cellular and cordless front-end

? Spread spectrum receivers

? RF data links

? UHF frequency conversion

? Portable radio