AX5243 datasheet(2/42 Pages) ONSEMI

2 / 42 page

AX5243

www.onsemi.com

Frequency Generation

• Configurable for Usage in 27 MHz −1050 MHz Bands

• RF Carrier Frequency and FSK Deviation

Programmable in 1 Hz Steps

• Ultra Fast Settling RF Frequency Synthesizer for

Low−power Consumption

• Fully Integrated RF Frequency Synthesizer with VCO

Auto−ranging and Band−width Boost Modes for Fast

Locking

• Configurable for either Fully Integrated VCO, Internal

VCO with External Inductor or Fully External VCO

• Configurable for either Fully Integrated or External

Synthesizer Loop Filter for a Large Range of

Bandwidths

• Channel Hopping up to 2000 hops/s

• Automatic Frequency Control (AFC)

Flexible Antenna Interface

• Integrated RX/TX Switching with Differential Antenna

Pins

Wakeup−on−Radio

• 640 Hz or 10 kHz Lowest Power Wake−up Timer

• Wake−up Time Interval Programmable between 98 ms

and 102 s

Sophisticated Radio Controller

• Fully Automatic Packet Reception and Transmission

without Micro−controller Intervention

• Supports HDLC, Raw, Wireless M−Bus Frames and

Arbitrary Defined Frames

• Automatic Channel Noise Level Tracking

• ms Resolution Timestamps for Exact Timing (eg. for

Frequency Hopping Systems)

• 256 Byte Micro−programmable FIFO, optionally

Supports Packet Sizes > 256 Bytes

• Three Matching Units for Preamble Byte, Sync−word

and Address

• Ability to store RSSI, Frequency Offset and Data−rate

Offset with the Packet Data

• Multiple Receiver Parameter Sets Allow the Use of

more Aggressive Receiver Parameters during Preamble,

dramatically Shortening the Required Preamble Length

at no Sensitivity Degradation

Advanced Crystal Oscillator

• Fast Start−up and Lowest Power Steady−state XTAL

Oscillator for a Wide Range of Crystals

• Integrated Crystal Tuning Capacitors

• Possibility of Applying an External Clock Reference

(TCXO)

Miscellaneous Features

• Few External Components

• SPI Microcontroller Interface

• Extended Register Set

• Fully Integrated Current/Voltage References

• QFN20 4 mm x 4 mm Package

• Internal Power−on−Reset

• Brown−out Detection

• 10 Bit 1 MS/s General Purpose ADC (GPADC)

Applications

27 − 1050 MHz Licensed and Unlicensed Radio Systems

• Internet of Things

• Automatic Meter Reading (AMR)

• Security Applications

• Building Automation

• Wireless Networks

• Messaging Paging

• Compatible with: Wireless M−Bus, POCSAG, FLEX,

KNX, Sigfox, Z−Wave, enocean

• Regulatory Regimes: EN 300 220 V2.3.1 including the

Narrow−band 12.5 kHz, 20 kHz and 25 kHz

Definitions; EN 300 422; FCC Part 15.247; FCC Part

15.249; FCC Part 90 6.25 kHz, 12.5 kHz and 25 kHz

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