SA621

INTEGRATED CIRCUITS SA621 1GHz - Low voltage LNA, mixer and VCO Product specification IC17 Data handbook 1997 Nov 07 Philips Semiconductors Philips Semiconductors Product specification 1GHz low voltage LNA, mixer and VCO SA621 DESCRIPTION The SA621 is a combined low-noise amplifier, mixer and VCO 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 12dB noise figure and IP3 of +4.5dBm at the input at 881MHz. The integrated VCO circuit with external resonator produces a high quality LO signal that drives the mixer and is buffered to an external PLL synthesizer IC. The nominal current drawn from a single 3V supply is 13.3mA. Additionally, the entire circuit can be powered down to further reduce the supply current to less than 20µA. PIN CONFIGURATION PD1 1 PD2 2 GND 3 LO OUT 4 GND 5 GND 6 TANK 7 GND 8 GND 9 BYPASS 10 20 MIXER OUT 19 MIXER OUT 18 GND 17 MIXER IN 16 GND 15 LNA IN 14 GND 13 LNA OUT 12 VCC 11 GND FEATURES Low current consumption Outstanding gain and noise figure Excellent gain stability versus temperature and supply voltage LNA, mixer and VCO power down capability Monotonic VCO frequency vs control voltage SR01429 Figure 1. Pin Configuration APPLICATIONS ...