SparkFun
ATmega128RFA1 Development Board
$67.40
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The ATmega128RFA1 is a portmanteau of sorts – two separate components combined to form one device; half microcontroller, half RF transciever. ATmega128RFA1 i...
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The ATmega128RFA1 is a portmanteau of sorts – two separate components combined to form one device; half microcontroller, half RF transciever. ATmega128RFA1 is an IEEE 802.15.4 compliant single-chip, combining the industry- leading AVR microcontroller and best-in-class 2.4GHz RF transceiver providing industry’s highest RF performance for single-chip devices, with a link budget of 103.5dBm.
The ATmega128RFA1 features Wake-on Radio, 32-bit MAC symbol counter, temperature sensor, automatic transmission modes, 128-bit AES crypto engine, true random number generator, high data rate modes, and antenna diversity support.
By looking at the ATmega128RFA1 Development Board you can see that we have changed the overall shape of the PCB to fit the Arduino form factor. We have also removed the SMD DC barrel jack and instead given you space to add a PTH DC barrel jack, JST connector (or screw terminal), and FTDI input. It includes an onboard 3.3V regulator and chip antenna. The board can be powered with either a 5V or a 9V wall wart.
Documents:
- Schematic
- Eagle Files
- Datasheet (ATmega128RFA1)
- Hookup Guide
- GitHub
Jargon buster
Plain-language definitions for the technical terms used above.
- 3.3V regulator
- A 3.3V regulator is a power circuit that provides a steady 3.3 volts for parts that need that supply voltage. On a breakout board, it can let the sensor run safely even when the connected microcontroller or power source uses a higher voltage.
- AVR
- AVR is a family of 8-bit microcontrollers (made by Microchip, formerly Atmel) used in many classic Arduino-style boards such as the Uno and Nano. They are widely supported but older, which can be a limit for memory- or speed-intensive tasks.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- PCB
- A printed circuit board (PCB) is a board, usually rigid, with etched copper tracks that connect electronic components together without loose wiring. Components are mounted on the board and signals route between them through the copper layout.
- PTH
- Plated through-hole means the pin holes are metal-lined so solder connects the pad on both sides of the board. It is useful for connectors and headers that need a strong mechanical and electrical connection.
- RF
- RF means radio frequency, referring to signals used for wireless communication and other high-frequency electronics. A low-noise, stable power supply is important for RF circuits because power noise can affect signal quality and measurements.
- screw terminal
- A connector that clamps bare wire using a small screw, making it easier to attach and remove wires without soldering. Screw terminals are useful for power wiring or thicker wires that are not suited to small plug-in connectors.
- SMD
- SMD means surface-mount device, a component style designed to be soldered directly onto the surface of a circuit board rather than through holes. SMD parts are compact and mounted flat on the board, which suits smaller and mass-produced designs.
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