Product overview
Description
The STA5635A is a fully integrated GNSS RF front-end able to support different bands (L1, L2, L5, L6 and L) thanks to a programmable and flexible RF-IF chain driven by a fractional PLL. In particular, G5RF is able to manage all the GNSS constellations available and planned in the next future like GPS, Galileo, Glonass, BeiDou, IRNSS and QZSS.
The RF_IF chain is followed by a 2-bit ADC able to convert the IF signal to sign (SIGN) and magnitude (MAG) bits. The MAG bit is internally used to control the variable gain amplifiers. The VGA gain can also be set via the SPI interface.
Additionally, the STA5635A is able to manage the L-band signal from 1525 to 1559 MHz, through a dedicated 10 bit ADC. In this case, the SPI interface is used to transmit raw L-band correction data to the host.
A digital interface, JESD207 compliant, is used to transmit GNSS data and clock to an external baseband.
The embedded fractional PLL allows supporting a wide range of reference clocks (the typical value is 26 MHz) and generates a sampling clock available for the baseband.
The STA5635A embeds two LDOs to supply at 1.1 V the analog and digital cores of the device facilitating requirements for external power supply. A third LDO can be turned-on to supply at 1.8 V external active components such as the TCXO.
The chip is manufactured in CMOS040nm technology and housed in a VFQFPN package.
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All features
- AEC-Q100 qualified
- Multi GNSS band support (L1/E1, L2C, L5/E5/E6/L6 and L band)
- Programmable IF bandwidth (7 or 13 MHz range)
- 1.62 V to 3.6 V supply voltage range
- Smart digital interface (JESD207-COMPATIBLE)
- Fractional-N synthesizer with embedded loop filter
- SPI interface for full programmability and interface to transmit L-band data bit
- 2 bit A/D converter
- Operating temperature range -40 °C ~ +105 °C
- CMOS040 technology
- VFQFPN 5x5x1.0 mm 32 leads package
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STMicroelectronics - STA5635A
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Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| STA5635A | Active | VFQFPN 5X5X1 32L P0.5 | Automotive | Ecopack2 |
STA5635A
Package:
VFQFPN 5X5X1 32L P0.5Material Declaration**:
PDF(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||||
| STA5635A | | | distributors No availability of distributors reported, please contact our sales office | |||||||||||
STA5635A Active
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors