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SA620 Datasheet(PDF) 1 Page - NXP Semiconductors |
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SA620 Datasheet(HTML) 1 Page - NXP Semiconductors |
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1 / 11 page  Philips Semiconductors RF Communications Products Product specification SA620 Low voltage LNA, mixer and VCO — 1GHz 2 December 15, 1993 853-1725 11658 DESCRIPTION The SA620 is a combined RF amplifier, VCO with tracking bandpass filter and mixer designed for high-performance low-power communication systems from 800-1200MHz. The low-noise preamplifier has a 1.6dB noise figure at 900MHz with 11.5dB gain and an IP3 intercept of -3dBm 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 an 9dB noise figure and IP3 of –6dBm at the input at 900MHz. An external LO can be used in place of the internal VCO for improved mixer input IP3 and a 3mA reduction in current. The chip incorporates a through-mode option so the RF amplifier can be disabled and replaced by an attenuator (S21 = –7.5dB). This is useful for improving the overall dynamic range of the receiver when in an overload situation. The nominal current drawn from a single 3V supply is 10.4mA and 7.2mA in the thru-mode. Additionally, the VCO and Mixer can be powered down to further reduce the supply current to 1.2mA. FEATURES • Low current consumption: 10.4mA nominal, 7.2mA with thru-mode activated • Outstanding noise figure: 1.6dB for the amplifier and 9dB for the mixer at 900MHz • Excellent gain stability versus temperature and supply voltage • Switchable overload capability • Independent LNA, mixer and VCO power down capability • Internal VCO automatic leveling loop • Monotonic VCO frequency vs control voltage APPLICATIONS • 900MHz cellular front-end • 900MHz cordless front-end • Spread spectrum receivers • RF data links • UHF frequency conversion • Portable radio PIN CONFIGURATION DK Package 1 2 3 4 5 6 7 8 9 10 11 12 13 14 20 19 18 17 16 15 VCC LNA GND LNA OUT LNA BIAS MIXER IN MIXER GND MIXER BYPASS MIXER OUT OSC GND VCO OUT LNA ENABLE LNA GND LNA IN LNA GND LNA GND OSC GND MIXER PWRDN OSC PWRDN OSC1 OSC2 ORDERING INFORMATION DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG # 20-Pin Plastic Shrink Small Outline Package (Surface-mount, SSOP) -40 to +85 °C SA620DK 1563 BLOCK DIAGRAM 4 3 2 1 5 20 19 18 17 16 7 6 10 9 8 15 14 13 12 11 MIXER OSC PWRDN OSC1 OSC2 VCC LNA LNA BIAS MIXER IN MIXER GND MIXER OUT OSC GND VCO OUT LNA LO VCO RF IF LNA ENABLE LNA GND LNA IN LNA OSC GND AUTOMATIC LEVELING LOOP TRACKING BANDPASS FILTER GND LNA OUT GND LNA GND PWRDN MIXER BYPASS |
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