Description
NT1068, being 4-channel RF RF that covers all GNSS GPS/GLONASS/Galileo/BeiDou/NavIC/QZSS) as well as L-band satellite augmentation systems like OmniSTAR at all frequency bands (S/L1/L2/L3/L5/E1/E5a/E5b/E6/B1/B2/B3), inherits all features of NT1065 including pin-to-pin compatibility. The key benefit of NT1068 over NT1065 is the ability to downconvert signals of S-band.
Also there is a special configuration to acquire simultaneously S+L5 signals of NavIC, L1-band signals of either GPS, Galileo, BeiDou or GLONASS and L2-band signals of either GPS or GLONASS. It is also possible to obtain Galileo E5 band as well as BeiDou B1/B2/B3 (phase 3) band as entire signal with two channels fed by the same LO and then restore in digital domain to true complex data. As a benefit one can discover wide possibilities of improving the positioning accuracy down to centimeter range without taking RTK technique. NT1068 has same channel structure as NT1065 with single conversion low-IF architecture. Each setting, including output signal frequency bandwidth, AGC options, mirror channel suppression option, etc., can be set for every channel individually. NT1068 also integrates with two fully independent frequency synthesizers that have the common reference (TCXO) input making LO signals coherent in terms of frequency. Channel#1 and channel#2 are supplied with common LO signal or two different LO signals generated in PLL “A” while PLL “B” is assigned for channels #3 and #4. For specific applications there is an option to feed all four channels with single LO source from PLL “A”.
Features NT1068 RFIC
- Single conversion superheterodyne receiver
- Four independent configurable channels, each includes preamplifier, image rejection mixer, IF filter, IFA, 2-bit ADC
- Signal bandwidth (up to 31MHz) supports GNSS high precision codes such as P-code in GPS or wideband E5 Galileo
- Dual adoptable AGC system (RF + IF) or programmable gain
- High dynamic range with 1dB compression point more than -30 dBm
- Analog differential output with two options of voltage swing 0.2/0.47Vp-p and 0.4/0.98Vp-p (sine wave/noise) or 2-bit ADC digital output data
- Two independent fully integrated synthesizers with flexible LO and CLK frequencies selection (“A” and “B”)
- Embedded temperature sensor
- SPI interface with easy-to-use register map
- Individual status indicators of main subsystems (available in SPI registers) and cumulative status indicator (AOK, available both as a separate pin and in SPI registers)
- Two form-factors: 7 x 7 mm WLCSP or 10 x 10 mm QFN88 package
Applications NT1068 RF IC
- GNSS based positioning systems
- GNSS based goniometric systems
- In-vehicle navigation systems
- GNSS based driverless car systems
- Professional drones
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