A pair of integrated-circuit (IC) solutions are ideal for in-automobile Global Navigation Satellite System (GNSS) applications. Model MAX2670 is a dual-stage, low-noise amplifier (LNA) while model MAX2769B is a universal GPS receiver qualified to AC-Q100 automotive requirements. The receiver IC is driven by a fractional-N frequency synthesizer and provides programmable intermediate-frequency (IF) output with cumulative noise figure of 1.4 dB. The receiver features an integrated crystal-oscillator reference and can operates from a supply voltage of +2.7 to +3.7 VDC. It is supplied in a 28-pin RoHS-compliant lead-free QFN package. The LNA IC, model MAX2670, features 1 dB noise figure and 34.8 dB gain at the GPS frequency of 1575 MHz. It suffers gain variations of less than 0.3 dB with temperature and offers adjustable gain, controllable in 3.4-dB steps. The LNA, which can be used a supply voltages of +3.0 to +5.5 VDC, is supplied in a 3 x 3 mm surface-mount package that is electrostatic-discharge (ESD) protected to a ±2-kV human-body model (HBM). Both ICs are based on the firm’s low-power SiGe BiCMOS process technology.
Maxim Integrated Products, Inc.
120 San Gabriel Dr.
Sunnyvale, CA 94086
FAX: (408) 774-9139