AT86RF211SAH-R

AT86RF211SAH-R Datasheet


• Up-compatibility with the AT86RF211 Same Features as AT86RF211 after Power-on Reset New Features Activated by a Bit ADDFEAT

Part Datasheet
AT86RF211SAH-R AT86RF211SAH-R AT86RF211SAH-R (pdf)
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• Up-compatibility with the AT86RF211 Same Features as AT86RF211 after Power-on Reset New Features Activated by a Bit ADDFEAT
• Shrink Version with a Current Consumption Reduction of 20%
• Direct Replacement in Production
• Migration Documentation/Kit Available for AT86RF211 Users
• Multiband Transceiver 400 to 950 MHz
• Monochip RF Solution Transmitter-Receiver-Synthesizer
• Integrated PLL and VCO no External Coil
• Design Highly Resistant to Interference
• Digital Channel Selection 200 Hz Steps
• Data Rates up to 100 kbps
• Transparent Asynchronous or Synchronous Modes thanks to Built-in Clock Recovery
• Three Data Slicer Modes Available "External", "Internal", "Charge and Hold"
• High Output Power Enabling Use of Low-Cost Printed Antennas:
+14 dBm in 915 MHz Frequency Band +15 dBm in 868 MHz Frequency Band +16 dBm in 433 MHz Frequency Band
• FSK Modulation Integrated Modulator and Demodulator
• Meets Wideband Application Requirements in the USA 250 kHz
• Power Saving Stand-alone "Sleep" Mode and "Wake-up" Procedures 8 Selectable Digital Levels for Output Power High Data Rate and Fast Settling Time of the PLL Low Power Oscillator Running Mode
• 100% Digital Interface through R/W Registers Including Fast Digital RSSI for Quick Channel Scanning VCC Readout Digital Clock Output to Drive the Companion Microcontroller

FSK Transceiver for ISM Radio Applications

AT86RF211S

The AT86RF211S is a shrink version of the AT86RF211. In addition to cost reduction, the use of the latest RF Atmel process provides it with a high level of robustness and performance high output power and significantly improves certain technical features such as power consumption. This is a 100% AT86RF211-compatible product that can be directly replaced in production, without redesigning the hardware or software. New features are also available through the software activated by the ADDFEAT bit .

Like the AT86RF211, this is a single-chip transceiver dedicated to low-power wireless applications, optimized for licence-free ISM band operations from 400 to 950 MHz. Its flexibility and unique level of integration make it a natural choice for any system related to telemetry, remote controls, alarms, radio modems, Automatic Meter Reading, hand-held terminals or high-tech games and appliances. The AT86RF211S makes bi-directional communications affordable for applications such as secured transmissions with hand-shake procedures, new features and services. The AT86RF211S can easily be configured to provide the optimal solution for your application choice of external filters versus technical requirements bandwidth, selectivity, immunity, range, etc , and software protocol single channel, frequency agility, listen
before transit, FHSS . The AT86RF211S is also well adapted to battery-operated systems, as it can be powered with as little as 2.4V. It also offers a "wake-up" receiver feature to save power by alerting the associated microcontroller only when a valid inquiry is detected.

General Overview

The AT86RF211S is a microcontroller RF peripheral. The chip’s setup is done by writing or reading the registers for example, frequency selection or by obtaining information on the parameters such as RSSI level, Vbattery or PLL lock state. These operations are all carried out via a three-wire serial interface.

List of New Features

The AT86RF211S now replaces the AT86RF211, and offers numerous new features.

The AT86RF211S can operate in two different modes, described in the following table:

Mode Name RF211 RF211S

Choice Made By ADDFEAT = CTRL1[0] = 0 ADDFEAT = CTRL1[0] = 1

Compatibility

At reset state of DTR register

Additional Features No Yes

Recommended

For existing applications direct replacement

For new applications or upgrades new functions

Data Rate

The AT86RF211S has a data rate of up to 100 kbps. The modulator and demodulator have been optimized to increase the speed of the RF links while maintaining a high performance level.

The receiver’s bandwidth has been increased to 250 kHz for very wide band applications in the US.

Low-current XTAL Running Mode It is now possible to run the XTO alone this is useful for real-time demanding applications. The sinked current is 150 µA, increasing according to the load capacitance when the XTO signal is buffered, to be fed to a companion microcontroller thus saving on the cost of the crystal for the MCU .

Faster RSSI

The ADC clock period can now be decreased from 12 to µs. Faster channel scanning in multi-channel applications or LBT Listen Before Transmit is then possible, as well as ASK demodulation for low data rates.

MHz Crystal with MHz IF1 Filter

It is now easy to use a MHz crystal and feed a very fast clock to the companion MCU, and yet keep the IF1 at MHz. Commercially-available filters at this frequency are inexpensive and multisource.
2 AT86RF211S

AT86RF211S

Digital Signal Output DIGOUT Pin 17 was previously reserved and not connected, but can now deliver several signals:
• Divided XTAL reference clock
• Carrier detection when RSSI is above predefined TRSSI
• XTO running flag
• 455 kHz signal from the discriminator PLL
• Receive mode flag
• 1 kHz reference clock of the wake-up timer
• Lock detect flag PLLL of the main PLL

Charge and Hold Data Slicer Mode After a charge phase, the comparison threshold of the data slicer is stored in the external SKFILT capacitor. This is an additional and very easy way to implement a transparent NRZ UART mode, for instance.

Low-power Standby Modes

PDN Mode

This is a very low power mode. Only the control interface is powered and ICC is as low as 500 nA typical.

XTAL Running

The XTO remains active for short start-up-time applications at 150 µA, rising to 950 µA typical if the MHz signal is buffered on the DIGOUT pin, assuming that the load is 10 pF.

Asynchronous Transparent Transmit Mode

The chip is set-up by the MCU to act as transmitter. It then acts like a pipe in which any data entering DATAMSG is immediately radiated on the antenna. No data is stored or processed on the chip. The transmission is asynchronous.
Ordering Information

Tolerance max
basic max

Dimension A A1 A2 D D1 E E1 L e b ccc

Nominal Value inch
min/0.006 max

Tolerance max
basic

Full Part Number AT86RF211SAH-R

Package TQFP48

Conditioning Tray Tape & reel

The AT86RF211S can be delivered in die form. Please contact your local Atmel sales office.
64 AT86RF211S

Table of Contents

Features 1 Description 1 General Overview 2
1.1List of New Features 1.2Low-power Standby Modes 1.3Asynchronous Transparent Transmit Mode 1.4Asynchronous Transparent Receive Mode 1.5Synchronous Receive Modes 1.6Wake-up Mode 1.7Selecting the Operating Mode 1.8Block Diagram 1.9Pin Description
2 Detailed Description 11
2.1Frequency Synthesis 2.2Receiver Description 2.3Transmitter Description 2.4Digital Features 2.5Wake-up Mode 2.6Control Logic
3 Electrical Specification 52 4 Typical Application 61
4.1Implementation 4.2Layout
5 Packaging Information 63 6 Ordering Information 63

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Datasheet ID: AT86RF211SAH-R 519056