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Microchip Technology ATA8520D-GHQW
- Part No.:
- ATA8520D-GHQW
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
ATA8520D-GHQW.pdf
- Description:
- IC RF TXRX+MCU ISM<1GHZ 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,264
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Product details
Overview
ATA8520D-GHQW from Microchip Technology (formerly Atmel) is a fully integrated SIGFOX™-compliant single-chip RF transceiver with embedded AVR® microcontroller, protocol stack, ID/PAC, and SPI interface. It operates in 868.0–868.6 MHz (uplink) and 869.4–869.65 MHz (downlink), delivers 100 bit/s uplink (DBPSK) and 600 bit/s downlink (GFSK), and supports ultra-low-power operation with 32.7 mA TX and 10.4 mA RX current - ideal for battery-powered SIGFOX endpoint nodes in smart metering and asset tracking.
For engineers reviewing the ATA8520D-GHQW datasheet, ATA8520D-GHQW pinout, ATA8520D-GHQW application, or ATA8520D-GHQW equivalent, this page provides verified functional identity, validated 32-pin QFN package mapping, confirmed SPI-based control architecture, real-world power mode timing (10 ms OFF→IDLE), and two manufacturer-validated alternative parts for SIGFOX modem substitution.
Technical Context
The ATA8520D-GHQW integrates three functional domains: an RF frontend with fractional-N PLL, digital baseband signal processing, and an 8-bit AVR microcontroller executing preloaded SIGFOX firmware. Its closed-loop modulator enables precise ISM-band frequency synthesis, while internal SPDT switch routing (SPDT_ANT/SPDT_TX/SPDT_RX) manages antenna path selection between uplink and downlink without external RF switches.
SPI interface (SCK/MOSI/MISO/NSS at ≤125 kHz, Mode 0) controls all operations including frame transmission, PAC/ID readout, supply/temperature measurement, and system configuration. The EVENT pin (PB6) signals critical state transitions - power-up completion, frame transmit/receive end, or error conditions - enabling deterministic host MCU coordination without polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Uplink Frequency | 868.0–868.6 MHz: Matches ETSI-compliant SIGFOX uplink band in Europe; requires no external VCO tuning. |
| Downlink Frequency | 869.4–869.65 MHz: Aligns with SIGFOX downlink channel plan; supports bidirectional network interaction. |
| TX Current | 32.7 mA at 3V: Enables >10-year battery life in coin-cell-powered endpoints transmitting 140-byte/day. |
| OFF Mode Current | 5 nA typical (≤600 nA @ +85°C): Permits multi-year operation on primary lithium cells with minimal self-discharge impact. |
| Data Rates | 100 bit/s (uplink, DBPSK); 600 bit/s (downlink, GFSK): Fixed rates defined by SIGFOX specification; no host-side modulation logic required. |
| SPI Interface | 125 kHz max clock, Mode 0 (CPOL=CPHA=0): Ensures reliable communication with low-cost MCUs; timing-critical delays (T0≥65 µs, T2≥100 µs) are mandatory. |
| Supply Range | 1.9–3.6 V or 2.4–5.5 V: Dual-range support enables direct connection to 3V Li-ion or 5V industrial rails; 3V±5% required for SIGFOX compliance. |
| Operating Temp | –40°C to +85°C: Validated for outdoor deployment in utility meters, parking sensors, and industrial telemetry. |
Pinout & Package
ATA8520D-GHQW uses a 5×5 mm QFN32 package with 0.5 mm pitch and exposed die pad connected to AGND. Pin functions are validated per Atmel 9390E–INDCO–11/15 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RF_IN (2) | Receiver analog input | Connects to LNA output or antenna via matching network; referenced to AGND. |
| RF_OUT (7) | Transmitter power amplifier output | Drives 50 Ω antenna directly; requires external matching (C1/L1) per Figure 1-3. |
| SPDT_ANT (4) | Antenna port of internal SPDT switch | Shared I/O for uplink (TX path) and downlink (RX path); eliminates external RF switch. |
| PB6/EVENT (28) | Digital status indicator | Active-low open-drain signal asserts on power-up, frame completion, or error; requires external pull-up. |
| PC1–PC5, PB4, PB7 | Power-on/wake-up inputs | All active in OFF mode; NPWRONx pins pulled low wake device; PWRON (PB4) pulled high wakes device. |
| PB0, PB7 | FEM control outputs | Drive external front-end modules: PB0=1 & PB7=1 → uplink; PB0=1 & PB7=0 → downlink. |
Key Features
| Feature | Design Value |
|---|---|
| SIGFOX protocol stack integration | Eliminates need for external MCU firmware development; handles frame encoding, CRC, retry, and backend registration (ID/PAC). |
| Internal SPDT RF switch | Reduces BOM count by removing discrete antenna switch; supports full-duplex-capable half-duplex operation. |
| Ultra-low OFF-mode current | 5 nA typical enables >15-year shelf life and decade-scale field deployment on primary batteries. |
| Hardware-accelerated temperature/voltage sensing | On-chip ADC and calibration enable autonomous health monitoring without external components. |
| Configurable 3V/5V supply mode | Single SPI command (0x11) selects PA supply path; avoids hardware redesign when migrating between battery and line-powered systems. |
| Event-driven operation | PB6 assertion replaces polling; reduces host MCU active time and simplifies firmware state machine design. |
Applications
| Smart Metering | Asset Tracking |
|---|---|
Use Scenario: Wireless transmission of gas/water/electricity consumption data from residential meters to SIGFOX base stations every 15 minutes. IC Role / Device Role / Timing Role: Standalone SIGFOX modem handling uplink-only transmission, sleep/wake coordination, and battery voltage monitoring. Use Value: Eliminates external MCU and RF front-end; achieves 12+ year battery life using 3V lithium thionyl chloride cell. | Use Scenario: GPS-denied indoor/outdoor location reporting for logistics containers, pallets, or medical equipment. IC Role / Device Role / Timing Role: Low-duty-cycle endpoint that wakes on timer or motion event, transmits ID + sensor data, then returns to 5 nA OFF mode. Use Value: Reduces total solution size to <10 cm² PCB area; supports certified ETSI-compliant transmission without RF expertise. |
| Smart Parking | Alarm & Security Systems |
Use Scenario: Detection of vehicle presence/absence in street parking spots using magnetic or ultrasonic sensors. IC Role / Device Role / Timing Role: Sensor interface and SIGFOX transmitter; samples sensor every 30 seconds, transmits occupancy status only on change. Use Value: Enables battery-powered, maintenance-free deployment for 5+ years; leverages existing SIGFOX infrastructure instead of cellular. | Use Scenario: Wireless door/window contact sensors and motion detectors in residential security systems. IC Role / Device Role / Timing Role: Tamper-resistant endpoint performing encrypted uplink transmission of alarm events and periodic heartbeat messages. Use Value: Integrates secure ID/PAC storage and tamper detection; meets EN 50131 Grade 2 requirements with minimal external components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SIGFOX modem applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AXP1000-100 | Monolithic SIGFOX SoC with ARM Cortex-M0+, 128 kB Flash, and integrated DC-DC; higher current (45 mA TX), larger 7×7 mm QFN48 package. | Requires full firmware development; supports custom protocols beyond SIGFOX; suited for edge-processing use cases. | Select when needing local decision-making (e.g., threshold-based alerts) or multi-protocol flexibility (LoRaWAN fallback). |
| STM32WL55JC | Sub-GHz dual-core (Cortex-M4 + Cortex-M0+) SoC with integrated SX126x radio; supports SIGFOX via software stack; 25 mA TX, 5×5 mm QFN48. | No embedded SIGFOX stack; requires ST's certified middleware and additional flash/RAM resources for protocol implementation. | Select when leveraging STM32 ecosystem, requiring Bluetooth LE coexistence, or planning migration to proprietary LPWAN. |
Compared with AXP1000-100 and STM32WL55JC, ATA8520D-GHQW delivers turnkey SIGFOX compliance with zero firmware development, lowest quiescent current, and smallest footprint - making it optimal for cost-sensitive, battery-constrained endpoints where protocol fidelity and longevity are paramount.
Availability
ATA8520D-GHQW is available at Aetrix Electronics and suitable for smart metering, asset tracking, smart parking, and alarm & security systems requiring stable component supply, long-term lifecycle assurance, and ETSI-certified RF performance.
Supply support for ATA8520D-GHQW 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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel wireless products including the ATA8520D series.
The ATA8520D-GHQW belongs to Microchip's SIGFOX-optimized RF transceiver product line, designed specifically for ultra-low-power, certified wide-area IoT endpoints targeting European and global ISM bands.
FAQ
What is the exact function of the PB0 and PB7 pins on the ATA8520D-GHQW?
On the ATA8520D-GHQW, PB0 and PB7 serve as FEM control outputs. When PB0 = 1 and PB7 = 1, the device configures for uplink transmission; when PB0 = 1 and PB7 = 0, it configures for downlink reception. These pins directly drive external front-end modules (LNA/PA/switch) and can also control the internal SPDT switch if the FEM is not used. Their behavior is defined in Table 2-3 of the ATA8520D-GHQW datasheet.
Does the ATA8520D-GHQW require an external crystal oscillator?
Yes, the ATA8520D-GHQW requires an external crystal oscillator connected to XTAL1 and XTAL2 (pins 10 and 11). The device uses this crystal with its internal fractional-N PLL to generate precise uplink (868.0–868.6 MHz) and downlink (869.4–869.65 MHz) carrier frequencies. Load capacitors are integrated internally, reducing external component count.
How does the ATA8520D-GHQW enter and exit OFF mode?
The ATA8520D-GHQW powers up in OFF mode. To exit OFF mode, assert any NPWRONx pin (PC1–PC5, PB7) low or PWRON (PB4) high for ≥10 µs. To re-enter OFF mode, first deactivate all wake-up pins, then issue the SPI command 0x05 ("OFF Mode"). The device draws ≤600 nA in OFF mode at +85°C, enabling multi-year battery operation.
Can the ATA8520D-GHQW operate with a 5V supply, and what configuration is required?
Yes, the ATA8520D-GHQW supports 2.4–5.5 V supply. For 5V operation, VS_PA (pin 8) must be left open and the internal LDO enabled via SPI command 0x11 ("Write System Configuration") with SysConf bit 3 = 0. This configuration must be written before transmission and persists after reset. Default factory setting is 3V mode.
What data length and format does the ATA8520D-GHQW support for SIGFOX uplink frames?
The ATA8520D-GHQW supports uplink payloads of 0–12 bytes per SIGFOX frame, written via SPI command 0x07 ("Write TX Buffer"). Frames are transmitted at 100 bit/s using DBPSK modulation. The device handles all SIGFOX framing, CRC, and retry logic internally - no host MCU involvement in packet construction is required.
ATA8520D-GHQW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- General ISM < 1GHz
- Protocol:
- SIGFOX™
- Modulation:
- DBSPK, GFSK
- Frequency:
- 868MHz
- Data Rate (Max):
- 600bps
- Power - Output:
- 14dBm
- Sensitivity:
- -121.5dBm
- Memory Size:
- -
- Serial Interfaces:
- SPI
- GPIO:
- -
- Voltage - Supply:
- 1.9V ~ 3.6V, 2.4V ~ 5.5V
- Current - Receiving:
- 10.4mA
- Current - Transmitting:
- 31.8mA ~ 32.7mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-VQFN (5x5)
ATA8520D-GHQW FAQ
1.How can I place an order for ATA8520D-GHQW through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA8520D-GHQW 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 ATA8520D-GHQW reliable?
The price and inventory of ATA8520D-GHQW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA8520D-GHQW is usually 5 days.
3.What payment methods are accepted for ATA8520D-GHQW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATA8520D-GHQW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATA8520D-GHQW?
ATA8520D-GHQW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA8520D-GHQW 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 ATA8520D-GHQW?
For technical support, including ATA8520D-GHQW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA8520D-GHQW requirements.
6.How does Aetrix verify that ATA8520D-GHQW is sourced from the original manufacturer or authorized distributors?
All ATA8520D-GHQW 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 ATA8520D-GHQW meets industry standards.
7.What is the process for return or replacement of ATA8520D-GHQW?
All ATA8520D-GHQW units undergo pre-shipment inspection (PSI). If there is an issue with ATA8520D-GHQW, 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 ATA8520D-GHQW part is unused and in its original packaging.
Return procedure for ATA8520D-GHQW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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