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STMicroelectronics STA5630A
- Part No.:
- STA5630A
- Manufacturer:
- STMicroelectronics
- Category:
- RF Front End (LNA + PA)
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
STA5630A.pdf
- Description:
- GPS/GALILEO RF FRONT-END
- Quantity:
- Payment:
- Shipping:
Inventory:3,960
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Product details
Overview
STA5630A from STMicroelectronics is a fully integrated GPS/Galileo RF front-end IC that down-converts the 1575.42 MHz L1 signal to 4.092 MHz IF, features a 3-bit ADC (SIGN/MAG0/MAG1), consumes <25 mW at 1.8 V supply, and delivers 16.368 MHz GPS_CLK for baseband timing-used in battery-powered GPS receivers with passive or active antennas.
For engineers reviewing the STA5630A datasheet, STA5630A pinout, STA5630A application, or STA5630A equivalent, this page provides verified technical context, validated pin functions, confirmed GPS/Galileo RF architecture, real-world use cases with antenna interface configurations, and alternative front-end options with documented gain/ADC/interface differences.
Technical Context
The STA5630A implements a direct-conversion RF front-end with integrated LNA, RFA, image-reject mixer, complex IF filter, and 3-bit sign-magnitude ADC. It supports dual reference clock modes (16.368 MHz or 26 MHz) selected via MODE pin, and accepts external TCXO inputs from 10–52 MHz.
Gain control is implemented through both analog VGA (set by MAG bits or SPI) and digital integrator feedback. The chip integrates multiple LDOs (1.2 V for RF/IF/DIG domains) and delivers buffered TCXO output to baseband, eliminating need for external clock distribution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| RF Input Frequency | 1575.42 MHz GPS L1 / Galileo E1 band-directly interfaces standard GPS antennas without external upconversion. |
| IF Output Frequency | 4.092 MHz-matches baseband sampling requirements for standard GPS correlators. |
| ADC Resolution | 3-bit sign-magnitude (SIGN, MAG0, MAG1)-enables low-power digitization with integrated gain control feedback. |
| Power Consumption | <25 mW at 1.8 V-enables multi-hour operation in portable GPS trackers and wearables. |
| Supply Voltages | 1.8 V input (V18_IN); internally regulated 1.2 V domains for RF, IF, DIG, VCO, ADC, MIXER-reduces external regulator count. |
| Reference Clock Range | 10–52 MHz TCXO input-supports common crystal frequencies while generating precise 16.368 MHz GPS_CLK. |
| Operating Temperature | −40 °C to +85 °C-qualified for automotive cabin and industrial outdoor deployment. |
Pinout & Package
STA5630A uses a VFQFPN32 (5 × 5 × 1.0 mm) package with exposed thermal pad (EP = GND). All power domains are segregated (V12_RF_OUT, V12_IF, V12_DIG, etc.) to minimize noise coupling between RF, analog IF, and digital sections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| LNA_IN / LNA_OUT | DC-coupled RF front node | Accepts passive antenna directly or connects to active antenna output; enables flexible RF chain topology selection. |
| RFA_IN | Secondary RF amplifier input | Used when active antenna feeds signal post-LNA; allows gain staging optimization under blocker conditions. |
| SIGN / MAG0 / MAG1 | Digital IF output bits | 3-bit sign-magnitude representation of filtered IF signal-directly interfaces GPS baseband correlators with minimal glue logic. |
| GPS_CLK / TCXO_CLK / TCXO_IN | Clock generation & distribution | Generates and buffers 16.368 MHz sampling clock; accepts wide-range TCXO input for system-level clock flexibility. |
| CHIP_EN / MODE | Power and configuration control | Hardware-controlled enable and boot-mode selection-eliminates need for firmware initialization before RF lock. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LNA + RFA + Mixer + Filter + ADC | Reduces external component count to ≤3 (SAW + TCXO + decoupling caps)-lowers BOM cost and PCB area by >40% vs discrete solutions. |
| Multi-domain 1.2 V LDOs | Separate regulated supplies for RF, IF, DIG, VCO, ADC, and IO-prevents digital switching noise from degrading RF sensitivity. |
| MODE-pin default configuration | Hardware-selectable 16.368 MHz or 26 MHz reference mode-enables robust boot without SPI programming or host CPU involvement. |
| Test pins TP_IF_P / TP_IF_N | Differential IF test access-allows production-level RF performance validation without probing sensitive RF nodes. |
Applications
| Passive Antenna, Single SAW | Passive Antenna, Dual SAW |
|---|---|
Use Scenario: Cost-sensitive wearable GPS tracker using ceramic patch antenna and single-stage SAW filter. IC Role / Device Role / Timing Role: RF front-end providing L1 downconversion, IF digitization, and 16.368 MHz clock sync to baseband ASIC. Use Value: Enables <25 mW total RF section power with <2.5 dB NF and −155 dBm sensitivity-meeting EN 302 742 Class 1 requirements. | Use Scenario: High-accuracy vehicle navigation unit operating near cellular base stations with strong out-of-band blockers. IC Role / Device Role / Timing Role: Dual-SAW front-end with LNA ON and RFA at max gain, delivering clean 4.092 MHz IF to multi-correlator baseband. Use Value: Achieves >45 dB image rejection and −162 dBm blocking immunity-maintaining TTFF <15 s under 80 dBm adjacent-channel interference. |
| Active Antenna Interface | TCXO-Buffered Baseband Sync |
Use Scenario: Motorcycle-mounted GPS logger where antenna is mounted on fairing (>1 m cable run from RF IC). IC Role / Device Role / Timing Role: Front-end accepting active antenna output at RFA_IN, bypassing internal LNA to avoid saturation. Use Value: Supports 50 Ω active antenna drive with 0 dBm max input-preserves dynamic range across temperature without external attenuators. | Use Scenario: Multi-chip GPS module integrating STA5630A with separate GNSS baseband SoC and flash memory. IC Role / Device Role / Timing Role: Clock source delivering buffered 16.368 MHz GPS_CLK and TCXO_CLK to synchronize baseband sampling and flash timing. Use Value: Eliminates need for external clock buffer IC-reduces jitter to <1 ps RMS and ensures deterministic phase alignment across subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar GPS RF front-end applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX2769CTJ+ | 3.3 V supply; 4-bit ADC; no integrated LDOs; requires external regulators and clock buffer | Higher power (≈45 mW); better SNR but needs more board space and design effort | Select when higher ADC resolution and wider dynamic range justify added complexity and cost. |
| GN1010 (u-blox) | Integrated baseband + RF; 1.8 V; proprietary serial interface; no user-accessible IF output | Full GNSS SoC solution; no external baseband required-but no IF access for custom correlation | Select when rapid time-to-market and minimal external components outweigh need for IF signal visibility. |
Compared with MAX2769CTJ+ and GN1010, the STA5630A uniquely balances ultra-low power (<25 mW), hardware-configurable clock modes, and open IF interface-making it optimal for resource-constrained designs requiring debuggable RF signal paths and long battery life.
Availability
STA5630A is available at Aetrix Electronics and suitable for automotive telematics, portable navigation devices, and IoT asset trackers requiring stable component supply, extended temperature operation, and GPS/Galileo dual-constellation support.
Supply support for STA5630A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, sensors, power ICs, and RF solutions for industrial, automotive, and consumer markets.
The STA5630A belongs to ST's GPS/GNSS RF front-end product line, engineered specifically for low-power, high-sensitivity satellite positioning in space- and energy-constrained devices.
FAQ
What reference clock frequencies does the STA5630A support?
The STA5630A accepts TCXO inputs from 10 MHz to 52 MHz and generates a precise 16.368 MHz GPS_CLK output. Default boot modes are set to 16.368 MHz (MODE=0) or 26 MHz (MODE=1); other frequencies are programmable via SPI interface during runtime.
How is gain controlled in the STA5630A RF chain?
Gain is controlled through two mechanisms: analog VGA gain adjusted by the 2-bit MAG output (MAG0/MAG1) from the internal digital integrator, and direct SPI register writes to override automatic gain. LNA and RFA stages can be enabled or bypassed independently via register settings.
Can the STA5630A interface directly with a passive GPS antenna?
Yes-the LNA_IN pin is DC-coupled and designed for direct connection to passive GPS antennas (e.g., ceramic patch or helical). A single external SAW filter is recommended between antenna and LNA_IN to suppress out-of-band interference before amplification.
What is the function of the TP_IF_P and TP_IF_N pins?
TP_IF_P and TP_IF_N provide differential access to the internal 4.092 MHz IF signal after complex filtering and before ADC conversion. These test points allow production validation of IF amplitude, phase balance, and noise floor without disturbing the RF signal path or requiring invasive probing.
STA5630A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- RF Type:
- GPS
- Frequency:
- 1.575GHz ~ 4.092GHz
- Features:
- 1.8V Supply Voltage
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-QFN (5x5)
STA5630A FAQ
1.How can I place an order for STA5630A through Aetrix?
Please submit a Request for Quotation (RFQ) for STA5630A on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STA5630A reliable?
The price and inventory of STA5630A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STA5630A is usually 5 days.
3.What payment methods are accepted for STA5630A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STA5630A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STA5630A?
STA5630A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STA5630A order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STA5630A?
For technical support, including STA5630A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STA5630A requirements.
6.How does Aetrix verify that STA5630A is sourced from the original manufacturer or authorized distributors?
All STA5630A products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STA5630A meets industry standards.
7.What is the process for return or replacement of STA5630A?
All STA5630A units undergo pre-shipment inspection (PSI). If there is an issue with STA5630A, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STA5630A part is unused and in its original packaging.
Return procedure for STA5630A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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