ATR0601

www.DataSheet4U.com Features Very Low Power Design (40 mW) Single IF Architecture Excellent Noise Performance 1.5-bit ADC On Chip Small QFN Package (4 mm × 4 mm, 24 pins) Highly integrated, Few External Components Advanced BiCMOS Technology (UHF6s) Non ESD Sensitive Device GPS Front-end IC ATR0601 Preliminary 1. Description The ATR0601 is a single IF GPS front-end IC, designed to meet the requirements of mobile and automotive applications. Excellent RF performance combined with low noise figure enables high quality GPS solutions and it's very low power consumption fits perfectly to portable devices. Featuring a balanced XTO and a fully integrated balanced frequency synthesizer, only few external components are required. The ATR0601 offers a complete autonomous mode, utilizing the on chip AGC in closed loop operation, to set the gain of the IF VGA. Alternatively, in combination with the baseband processor ATR0621 the optimum gain of the IF VGA can be computed and set by software, using the digital SDI interface. Figure 1-1. VCC Block Diagram VDIG NBPI AGCO BPI EGC VCC BP NBP PUXTO PURF PMSS Logic 1 SDI A RF NRF A D VCO PLL XTO NXTO XTO X NX D SL SH SC GND TEST MO Rev. 4866A–GPS–08/05 DataSheet 4 U .com www.DataSheet4U.com 2. Pin Configuration Figure 2-1. Pinning QFN24 SC SH SL SDI EGC VCC 24 23 22 21 20 19 VDIG AGCO NXTO NX X XTO 1 2 3 4 5 6 18 17 16 15 14 13 PURF PUXTO NBPI BPI NBP BP Paddle GND 7 8 9 10 11 12 VCC MO TEST NRF RF NC Table 2-1...