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The Fastest Way to Wireless

Laird Technologies’ tiny AC4490-1x1 radio modules put the power of wireless into the smallest, most cost-sensitive applications. Despite their small size, the modules can replace a mile of cable even in harsh industrial conditions. Using field-proven FHSS 900MHz technology that utilizes an unlicensed frequency band*, AC4490-1x1s reject interference, enable co-located system operation, and ensure data integrity. With the help of a unique transparent protocol (RF232™), AC4490-1x1 integration is easy. OEMs simply solder the radio modules and antennas into place, then power-on. All frequency hopping, synchronization, and RF system data transmission/reception is performed by the radio module. The AC4490-1x1’s standard TTL interface provides bi-directional communication in point-to-point and point-to-multipoint networks. A number of on-the-fly control commands accommodate varying wireless applications.

Features

 

Markets

 
  • Smallest form factor: one inch square
  • Highest 900MHz data rate: 115.2 kbps
  • Operates in –40ºC to +85ºC temp. range
  • Easiest installation: protocol included
  • Extremely low power for battery operation
  • Range up to 1 mile
 
  • Recreation
  • Utility Management
 


Flexible RF Protocol

Laird's embedded transparent protocol simplifies the OEM’s integration process by utilizing drop-in installation. As each radio module receives raw data, it manages its over-the-air protocol to assure successful communication. Headers, data packet length, and CRCs are not required. The RF232 supports simple cable-replacement to complex peer-to-peer configurations, broadcast communication to all radio modules or address packets to a specific destination using unique MAC addresses embedded in each radio module.

RF Protocol Modes

 

Interface Protocol

 
  • Communication: Unicast (one-to-one addressing), Broadcast (one-to-multiple addressing)
  • Acknowledgement mode (ACK): API with hardware and/or software, ACK indication
  • One-beacon mode
  • Dynamic radio data table: Retains data from up to 12 radio module
 
  • On-the-fly radio module configuration: Destination address, RF transmit power, Co-located servers, RF channel, Broadcast/addressed
  • Raw data or transmit/receive API
  • 9-bit serial interface mode
  • Long range mode, enables sensitivity control
  • Generic A/D, D/A generic I/Os
  • Variable baud rate
  • RF packet size, timeout control
  • Onboard temperature sensor
  • Handshaking, CTS/RTS, full modem-mode available
  • In-range indicator
  • Error detection: Onboard CRC, Duplicate packet filtering
  • Data encryption standard (DES)
 



*The 900MHz frequency band is approved in the Americas and Australia as an unlicensed spectrum subject to approval by device.

 

Parameter AC4490–1x1
Interface SMT
Frequency band
(software selectable)
902-928 MHz (North America)**
Modulation FHSS FSK
Serial interface options 3V TTL
Serial interface data rate Up to 115.2 Kbps
Output power
(w/ 3dBi antenna)
0mW - 10mW variable
Current consumption
(transmit/receive)†
80mA / 28mA
Channels Up to 48 (North America)**
Security One-byte system ID
Voltage 3.3V
Sensitivity -99 dB @ full RF data rate
Range (line-of-sight w. 3dBi antenna) Up to 1 mile (1.6 km)
Temperature -40º to +80ºC
Humidity (non-condensing) 10% to 90%
Dimensions 1.0 x 1.0 x 0.2”
Weight 0.5 oz ( 15 g)
Antenna External via SMT pad


*The 900MHz band is approved in the Americas and Australia as an unlicensed spectrum subject to approval by device.
**For products and specifications suited to non-U.S. countries (e.g. Australia and Europe), please contact Laird Technologies directly.
†Current consumption assumes 50% transmitter on-time.
 

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