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Microchip Technology AT86RF212B-ZU
- Part No.:
- AT86RF212B-ZU
- Manufacturer:
- Microchip Technology
- Category:
- RF Transceiver ICs
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
AT86RF212B-ZU.pdf
- Description:
- IC RF TXRX+MCU 802.15.4 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,158
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Product details
Overview
AT86RF212B-ZU from Microchip Technology (formerly Atmel) is a fully integrated 769–935 MHz sub-GHz transceiver IC designed for IEEE 802.15.4-2011, ZigBee, and 6LoWPAN systems. It supports BPSK (20/40 kb/s) and O-QPSK (100–1000 kb/s) modulation, delivers -110 dBm receiver sensitivity, +11 dBm programmable TX output power, and operates from 1.8–3.6 V. It serves as the RF front-end in low-power wireless sensor nodes and industrial automation endpoints.
For engineers reviewing the AT86RF212B-ZU datasheet, AT86RF212B-ZU pinout, AT86RF212B-ZU application, or AT86RF212B-ZU equivalent, key selection considerations include its multi-band support (779–787 MHz CN, 863–870 MHz EU, 902–928 MHz NA), hardware-accelerated AES-128 and MAC functions, ultra-low sleep current (0.2 µA), and integrated 128-byte TRX buffer with SPI interface.
Technical Context
The AT86RF212B-ZU implements a direct-sequence spread spectrum (DSSS) radio architecture with fully integrated PLL, LNA, PA, and RX/TX switch. Its analog front-end uses differential RFP/RFN pins (100 Ω impedance) and supports automatic VCO/filter calibration, battery monitoring, and adjustable RX sensitivity.
Digital subsystems include a slave SPI interface (up to 7.5 MHz asynchronous), hardware MAC accelerator (CSMA-CA, auto-ACK/retransmit, address filtering), and dedicated AES-128 engine accessible via SPI. All control logic, frame buffering, and register configuration are managed through 6-bit addressable registers (0x00–0x3F).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Frequency Bands | 779–787 MHz (CN), 863–870 MHz (EU), 902–928 MHz (NA), 915–930 MHz (JP); enables global regulatory compliance without hardware change |
| Modulation & Data Rates | BPSK at 20/40 kb/s; O-QPSK at 100/200/250/400/500/1000 kb/s; supports IEEE 802.15.4-2003/2006/2011 and proprietary high-rate modes |
| Receiver Sensitivity | -110 dBm at 20 kb/s BPSK; ensures robust link budget in noisy industrial environments |
| TX Output Power | Programmable up to +11 dBm; allows tuning for range vs. EMI/power trade-offs per region |
| Supply Voltage | 1.8–3.6 V with internal LDOs for AVDD/DVDD; eliminates need for external regulators in battery-powered designs |
| Current Consumption | 0.2 µA (SLEEP), 450 µA (TRX_OFF), 9.2 mA (RX_ON), 18.0 mA (BUSY_TX @ +5 dBm); enables multi-year operation on coin cells |
| Interface | 4-wire SPI (SCLK/MOSI/MISO/SEL), IRQ, SLP_TR, /RST, CLKM; provides deterministic timing for real-time MAC layer integration |
Pinout & Package
AT86RF212B-ZU is housed in a 32-pin QFN package (5 × 5 × 0.9 mm³) with exposed paddle electrically connected to AVSS; requires soldering to PCB ground plane for thermal and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RFP / RFN | Differential RF I/O | 100 Ω differential antenna port; supports bidirectional TX/RX without external switch; DC bias varies by state (0.9 V TX, 20 mV RX) |
| /RST | Digital input | Active-low hardware reset; internal pull-up enabled in P_ON state; must be held high during normal operation |
| SLP_TR | Digital input | Multi-function control: enables SLEEP, triggers TX start, and disables CLKM; level-sensitive state machine control |
| /SEL, SCLK, MOSI, MISO | SPI interface | Standard 4-wire slave SPI; supports register, FIFO, and AES memory access; MSB-first, mode 0 timing |
| IRQ | Digital output | Configurable interrupt (active-high/low); doubles as Frame Buffer Empty indicator for efficient polling-free data handling |
| DIG1 / DIG2 | Digital output | Antenna diversity control (differential pair) or RX frame timestamping; pulled down when disabled |
| DIG3 / DIG4 | Digital output | RX/TX indication signals (inverted pair); used to drive external RF front-end switches in extended architectures |
| XTAL1 / XTAL2 | Crytal oscillator | 16 MHz crystal interface; XTAL1 accepts external clock; internal oscillator eliminates need for TCXO in cost-sensitive designs |
Key Features
| Feature | Design Value |
|---|---|
| Hardware MAC Accelerator | Offloads CSMA-CA, auto-ACK, retransmission, and address filtering from host MCU-reducing latency and firmware complexity |
| AES-128 Encryption Engine | Dedicated parallel crypto core accessible via SPI; enables secure over-the-air updates and end-to-end payload encryption without CPU overhead |
| Integrated 128-Byte TRX Buffer | Single SRAM buffer shared for TX and RX frames; eliminates external memory and simplifies buffer management in constrained MCUs |
| True Random Number Generator | On-chip entropy source compliant with NIST SP 800-90A; supports secure key generation for ZigBee Trust Center and TLS handshakes |
| Antenna Diversity Support | DIG1/DIG2 outputs provide hardware-controlled RF switch timing-enabling real-time path selection based on RSSI/LQI without software intervention |
| Ultra-Low-Power Sleep Mode | 0.2 µA quiescent current with all registers retained; allows wake-on-RX or timer events while preserving full configuration state |
Applications
| Smart Utility Metering | Industrial Wireless Sensor Network |
|---|---|
|
Use Scenario: Battery-powered gas/water meters transmitting hourly consumption data over mesh networks in dense urban deployments. IC Role / Device Role / Timing Role: Sub-GHz transceiver providing long-range, wall-penetrating RF link with hardware-accelerated IEEE 802.15.4g-compliant PHY layer. Use Value: -110 dBm sensitivity and +11 dBm TX power enable >1 km outdoor range; 0.2 µA sleep current extends battery life beyond 10 years. |
Use Scenario: Distributed temperature, vibration, and pressure monitoring across factory floors with interference from motors and inverters. IC Role / Device Role / Timing Role: Robust RF front-end with adaptive RX sensitivity and hardware RSSI/LQI reporting for dynamic channel selection. Use Value: O-QPSK 250 kb/s mode ensures timely alarm delivery; integrated LNA and filter calibration maintain SNR in EMI-heavy environments. |
| ZigBee Home Automation Hub | Energy-Harvesting IoT Node |
|
Use Scenario: Central hub coordinating lighting, HVAC, and security devices using ZigBee PRO stack with secure key exchange. IC Role / Device Role / Timing Role: IEEE 802.15.4-2011-compliant transceiver with hardware AES-128 and true RNG for secure network joining. Use Value: Parallel AES engine enables fast encryption of every frame; DIG3/DIG4 signals synchronize external PA/LNA for low-latency command response. |
Use Scenario: Self-powered environmental sensor harvesting energy from light/vibration, transmitting data only when sufficient charge is available. IC Role / Device Role / Timing Role: Ultra-low-voltage transceiver (1.8 V min) with precise battery monitor and wake-on-RX capability. Use Value: 1.8 V operation matches typical energy harvester output; battery monitor pin (BATMON) feeds ADC to prevent deep discharge of storage capacitor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar sub-GHz transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si4463-B1B-C2A | Higher max TX power (+20 dBm), narrower band support (896–918 MHz only), no integrated AES or MAC accelerator | Better suited for long-range point-to-point links requiring higher ERP; lacks ZigBee/802.15.4 hardware offload | Select when range >10 km is critical and host MCU handles full MAC; avoid if ZigBee certification or low-code development is required |
| CC1310F128RGZR | ARM Cortex-M3 MCU + RF core; supports multiple protocols (BLE, IEEE 802.15.4g, proprietary); lower RX sensitivity (-124 dBm @ 50 kb/s) | Enables single-chip system design with integrated processing; requires more PCB area and firmware effort than AT86RF212B-ZU + external MCU | Select for protocol flexibility and embedded processing; choose AT86RF212B-ZU when leveraging existing MCU assets and minimizing BOM count |
Compared with Si4463-B1B-C2A and CC1310F128RGZR, the AT86RF212B-ZU uniquely balances IEEE 802.15.4 hardware acceleration, multi-regional band coverage, and ultra-low sleep current-making it optimal for certified, battery-constrained ZigBee/6LoWPAN endpoints where MCU resources and power are tightly constrained.
Availability
AT86RF212B-ZU is available at Aetrix Electronics and suitable for smart metering, industrial sensor networks, home automation hubs, and energy-harvesting IoT nodes requiring stable component supply across multi-year production cycles.
Supply support for AT86RF212B-ZU 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 the AT86RF212B-ZU as part of its legacy wireless portfolio. The company specializes in microcontrollers, analog, and connectivity solutions for industrial, automotive, and IoT markets.
The AT86RF212B-ZU belongs to Microchip's IEEE 802.15.4-optimized transceiver product line, engineered specifically for low-power, standards-compliant sub-GHz wireless sensor networks where regulatory certification, interoperability, and long battery life are primary design goals.
FAQ
What frequency bands does the AT86RF212B-ZU support?
The AT86RF212B-ZU supports four regulatory bands: 779–787 MHz (China WPAN), 863–870 MHz (Europe SRD), 902–928 MHz (North America ISM), and 915–930 MHz (Japan). Each band is validated for IEEE 802.15.4-2011 compliance, and frequency selection is configured via register settings-not hardware modification. This enables single-design global deployment with region-specific firmware.
Does the AT86RF212B-ZU include hardware AES encryption?
Yes, the AT86RF212B-ZU integrates a dedicated AES-128 hardware accelerator accessible via SPI. It operates in parallel with PHY/MAC operations, allowing encryption/decryption of full frames without CPU involvement. The AT86RF212B-ZU supports ECB and CCM* modes required for ZigBee PRO and 6LoWPAN security stacks, with key storage handled externally by the host MCU.
What is the minimum supply voltage for AT86RF212B-ZU operation?
The AT86RF212B-ZU operates from 1.8 V to 3.6 V. Its internal LDOs generate regulated 1.8 V for analog (AVDD) and digital (DVDD) domains, enabling reliable function even as battery voltage declines. Below 1.8 V, the device enters undervoltage lockout (UVLO); no operation is guaranteed at 1.7 V or lower. This makes the AT86RF212B-ZU ideal for single-cell Li-SOCl₂ or two-cell alkaline systems.
How does the AT86RF212B-ZU handle antenna switching for diversity?
The AT86RF212B-ZU provides DIG1 and DIG2 as complementary digital outputs to control external RF switches for antenna diversity. When enabled, these pins generate synchronized timing signals that allow the host MCU to select the optimal antenna path based on real-time RSSI or LQI measurements. The AT86RF212B-ZU itself does not perform automatic switching-it supplies the control interface and measurement data for algorithmic decision-making in firmware.
Is an external crystal required for AT86RF212B-ZU operation?
Yes, the AT86RF212B-ZU requires a 16 MHz fundamental-mode crystal connected to XTAL1 and XTAL2 pins. The internal oscillator circuit provides full startup and calibration-including automatic load capacitance compensation-eliminating need for external trimming capacitors beyond standard CX1/CX2 (12 pF typical). An external clock signal may substitute for the crystal on XTAL1, but crystal-based operation is recommended for IEEE 802.15.4 timing accuracy.
AT86RF212B-ZU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Type:
- TxRx + MCU
- RF Family/Standard:
- 802.15.4, General ISM < 1GHz
- Protocol:
- 6LoWPAN, Zigbee®
- Modulation:
- BPSK, O-QPSK
- Frequency:
- 769MHz ~ 935MHz
- Data Rate (Max):
- 1Mbps
- Power - Output:
- 10dBm
- Sensitivity:
- -110dBm
- Memory Size:
- 128B SRAM
- Serial Interfaces:
- SPI
- GPIO:
- -
- Voltage - Supply:
- 1.8V ~ 3.6V
- Current - Receiving:
- 8.7mA ~ 9.2mA
- Current - Transmitting:
- 9.5mA ~ 26.5mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 32-QFN (5x5)
AT86RF212B-ZU FAQ
1.How can I place an order for AT86RF212B-ZU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT86RF212B-ZU 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 AT86RF212B-ZU reliable?
The price and inventory of AT86RF212B-ZU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT86RF212B-ZU is usually 5 days.
3.What payment methods are accepted for AT86RF212B-ZU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT86RF212B-ZU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT86RF212B-ZU?
AT86RF212B-ZU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT86RF212B-ZU 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 AT86RF212B-ZU?
For technical support, including AT86RF212B-ZU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT86RF212B-ZU requirements.
6.How does Aetrix verify that AT86RF212B-ZU is sourced from the original manufacturer or authorized distributors?
All AT86RF212B-ZU 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 AT86RF212B-ZU meets industry standards.
7.What is the process for return or replacement of AT86RF212B-ZU?
All AT86RF212B-ZU units undergo pre-shipment inspection (PSI). If there is an issue with AT86RF212B-ZU, 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 AT86RF212B-ZU part is unused and in its original packaging.
Return procedure for AT86RF212B-ZU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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