GPS RF and Base Band
Venus 120 GPS Receiver RF Frond End
The Venus120 is an integrated low-noise RF front-end for GPS receiver in the L1 band. Based on a low-IF architecture, the chip down-converts the 1575.42 MHz GPS (L1 band) signal to 4.092 MHz signal or 4.08 MHz signal. The integrated synthesizer supports 13/ 16.368/19.5 and 26 MHz reference frequencies which are commonly used in GPS systems and in cell phone applications.Venus120 operates from a single +1.8 V DC supply over a temperature range of -40 to +85 oC, consuming 15.5 mA (14 mA disabling on-chip LNA) and requiring minimum external components. It is fabricated on a 0.18 um CMOS process and housed in a thin 24 lead QFN package, presenting superior radio performance and low cost.
FEATURES
1. Low-IF architecture with integrated channel-select filter
2. Integrated LNA: 1.7 dB typ. noise figure
3. LNA 1 dB compression point: -15 dBm
4. Support 13/ 16.368/ 19.5 and 26 MHz reference frequencies.
5. 2-bit analog to digital converter
6. 1.8 V supply voltage
7. Sleep mode current <1 uA
8. Low external component count
9. 4mmx4mm QFN24, RoHS compliant
VENUS 6
Venus 6 chip features -159dBm sensitivity, low power consumption of ~10mA, and industry-leading time-to-first-fix (TTFF). The Venus 6 chip is ideal for consumer GPS applications ranging from handset, personal navigation, photo geo-tagging, to security tracking that requires extreme low power, very high-performance, and low-cost.
Venus 624LP (internal ROM version) is available.
VENUS624LP Low Power GPS/AGPS Baseband – ROM Version
The Venus624LP is a high-performance GPS baseband processor intended for embedded portable applications. It contains all the baseband function required for GPS signal acquisition, tracking, and navigation solution. The Venus624LP is designed to allow easy integration of GPS into application systems. A dedicated massive-correlator signal parameter search engine enables rapid search of all available satellites and acquisition of very weak signals. An advanced track engine allows weak signal tracking and positioning in severe environments such as urban canyons and under deep foliage. With exceptional signal acquisition speed, it has very low average power consumption for locate on demand type of applications. A complete low-cost high-performance GPS receiver can be built with Venus624LP, a compatible GPS RF front-end, and a small number of external components.
FEATURES
1. Ultra fast signal acquisition and TTFF speed
2. Perform 8 million time-frequency hypothesis testing per second
3. Signal detection better than -158dBm
4. Reacquisition sensitivity –155dBm
5. Open sky hot start 1 second
6. Open sky cold start 29 seconds
7. Accuracy 2.5m CEP
8. Stand-alone solution, no host needed
9. Tracking 13mW @ 11mA
10. 7mm x 7mm QFN48, RoHS compliant
VENUS 5
The Venus 5 solutions offer customers state of the art positioning technology featuring fastest TTFF performance and very high sensitivity. It delivers best performance over price ratio in the industry.
l Industry leading signal acquisition and time to first fix speed
l –158dBm sensitivity
l < 35 seconds @ -145dBm cold start
l < 1 second hot start under open sky
l < 4 second start with AGPS support
l 5m CEP accuracy
Venus 520 (external flash version)
Venus 521 (internal Flash version)
Venus 522 (internal ROM version)
