Semiconductor


Accord offers following Semiconductor solutions:
AST-230
The AST-230 is a system on chip for GPS solutions, which is targeted for portable applications. The AST-230 SOC is based on ARM7TDMI processor and it provides a multitude of interfaces to connect to external world. The AST-230 is completely code compatible with any ARM7TDMI based system. By integrating a rich set of industry-leading system peripherals and memory, ARM processors are the platform of choice for applications that require RISC programmability, and low power solutions.

Product Highlights
  • ARM7TDMI-S based SoC for GPS base band data processing of the data received from the GPS RF
  • In standalone mode, booting can be selected either from external NOR flash or by external host downloading boot image through SPI interface or through SPI flash
  • Internal SRAM of 2Mbits
  • Support up-to two banks of 8Mbits external flash/SRAM memories
  • Battery backed-up 4kbytes of internal memory for storing the ephemeris data for quick startup of GPS applications
  • Battery backed-up counter (inside GPS core) and RTC(Real Time Clock) to keep time
  • Automatic switching over to battery voltage when main power is not available and vice versa controlled by logic external to the SoC
  • Power-isolation logic between the VDD [on/off] and the VBAT [always-on] voltage islands
  • Scalable system clock frequency to suit processing requirements
  • Calibration for external clock with respect to the precise 1 second pulse from GPS with ~16.5ns accuracy
  • Supports Level triggered and edge triggered Interrupts
  • Programmable clock output
  • Three timers capable of running on external clock
  • Clock gating to different subsystems, to save power
  • Sleep mode ARM runs on 32KHz clock
  • Multiple SPI Chip select option via 6 GPIO lines
AST-230 (12mmx12mm)
AST-400
AST-400 is a complete GPS-SBAS module targeted at applications that require an extremely small GPS footprint. AST-400 combines a highly integrated GPS-SBAS RF front-end with a high performance GPS-SBAS digital baseband/processor along with the necessary discrete components into a single package for ease of integration into target application hardware.

The GPS-SBAS RF front-end is designed for GPS C/A receivers.

It has an in-built low noise amplifier (LNA), single down conversion stage, automatic gain controlled amplifier (AGC), on-chip IF band pass filter and a 2-bit analog-to-digital converter (ADC). In addition, it has in-built protection/detection circuitry for accidental short/open of the active GPS antenna.

The digital baseband is a revolutionary digital integrated circuit that combines a high performance GPS Correlator, ARM7 core and a host of rich peripherals. It delivers unmatched performance in conjunction with the RF front-end.

AST-400 supports USB 2.0 Full Speed device, SPI, TWI, Timers, GPIO and Battery backed counter/RTC.

AST-400 is available in a 8.2mm x 8.2mm FBGA package. It is RoHS certified and is qualified over the industrial temperature range of 40 0C to +85 0C.

Product Highlights
  • High performance, Small sized and Low power GPS-SBAS Multi-chip Module
  • Building block for a miniature GPS-SBAS receiver
  • Extremely fast fix times
  • Accurate timing output
  • 16-channel Correlator for ultra low signal detection and tracking
  • Rich set of interfaces
  • Single 3.3V input supply
  • NMEA0183 compatible message format and Custom binary message for host communication
  • Ease of integration; faster time-to-market
  • ARM7 based processing unit
  • 8.2mm x 8.2mm FBGA package
  • Fully ROHS compliant
AST-400 (8.2mm x 8.2mm)
AST-GLSRF
The AST-GLSRF is a high performance, fully integrated, RF front-end chip for down conversion and amplification of GLONASS signals. It has been designed for L1 (1602 MHz).

The AST-GLSRF is a superheterodyne receiver, with an on-chip low noise amplifier (LNA), local oscillator, one down conversion IF stage (at 6.120 MHz), an automatic gain controlled amplifier (AGC), an on chip IF low pass filter and a 2-bit analog-to-digital converter (ADC).

The down converter works with 16.368MHz reference clock. The sampling clock for ADC is generated either internally or can be supplied from external source at CKIN.

The down converter has an internal IF low pass filter, which does not require external calibration inputs. Antenna connection and open circuit can be sensed and the information is made available.

The chip can be interfaced with any active/passive GLONASS antenna.

Product Highlights
  • Single chip GLONASS downconverter
  • GLONASS L1 band (1602 MHz) receiver
  • 2.7 V to 3.3 V power supply
  • On-chip LNA
  • On-chip PLL including complete VCO
  • On-chip IF Low Pass Filter
  • 50 dB AGC dynamic range
  • SIGN and MAGN outputs
  • PLL lock information
  • Open/Short Antenna control
  • Low power operation 15 mA @ 3 Volt
  • Internal 26.598MHz sampling clock or optional external sampling clock input
AST-GLSRF (4mmx4mm)
AST-GPSRF
AST-GPSRF is a high performance, fully integrated, RF front-end chip for down conversion and amplification of GPS and Galileo signals. It has been designed for L1 (1575.42 MHz), C/A GPS band receivers and OS Galileo band receivers.

AST-GPSRF is a superheterodyne receiver, with an on-chip low noise amplifier (LNA), local oscillator, one down conversion IF stage (at 4.092 MHz), an automatic gain controlled amplifier (AGC), an on chip IF band pass filter and a 2-bit analog-to-digital converter (ADC).

The down converter works with 16.368MHz reference clock and sampling clock of 16.368MHz is internally generated.

The down converter has internal band pass filter, which does not require external calibration. Antenna connection and open circuit can be sensed and the information is made available.

The chip can be interfaced with any active/passive GPS antenna.

Product Highlights
  • Single chip GPS/Galileo downconverter
  • GPS L1 band C/A code (1575.42 MHz) receiver
  • 2.7 V to 3.3 V power supply
  • On-chip LNA
  • On-chip PLL including complete VCO
  • On-chip IF Band Pass Filter
  • 50 dB AGC dynamic range
  • SIGN and MAGN outputs
  • PLL lock information
  • Open/Short Antenna control
  • Low power operation 15 mA @ 3 Volt
  • Supports power-down mode
AST-GPSRF (4mmx4mm)

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