Innovative Technology

for a Connected World

AC4490

900MHz Radio Module

FLEXIBLE RF PROTOCOL

Laird Technologies’ 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.

LWS-SPEC-AC4490 0109

Any information furnished by Laird Technologies and its agents is believed to be accurate and reliable. Responsibility for the use and application of Laird Technologies materials

rests with the end user since Laird Technologies and its agents cannot be aware of all potential uses. Laird Technologies makes no warranties as to the fitness, merchant-

ability, or suitability of any Laird Technologies materials or products for any specific or general uses. Laird Technologies shall not be liable for incidental or consequential

damages of any kind. All Laird Technologies products are sold pursuant to the Laird Technologies terms and conditions of sale in effect from time to time, a copy of which will

owned by Bluetooth SIG, Inc., USA and licensed to Laird Technologies.

© 2009 All Rights Reserved. Laird Technologies is a registered trademark of Laird Technologies, Inc..

SPECIFICATIONS

Parameter

AC4490(LR)–1000

Interface

20-pin mini connector

Frequency (software selectable)

902-928 MHz (U.S)**

Modulation

FHSS FSK

Serial interface options

3V TTL

Serial interface data rate

Up to 115.2 Kbps

Output power (w/ 3dBi antenna)

10mW-1000mW variable

Current consumption††

650 mA typical

Channels

Up to 32 (U.S.)**

Security

One-byte system ID, DES

Voltage

pin 10: 3.3V-5.5V

pin 11: 3.3V +/-3%

Sensitivity

AC4490-1000:

-100 dB

AC4490LR-1000: -110 dB (Long Range mode)

Range

Up to 20 miles (32 km)

Temperature

-40º to +80ºC

Humidity (non-condensing)

10% to 90%

Dimensions

1.90 x 1.65 x 0.20“

(49 x 42 x 5 mm)

Weight

< 0.75 oz (< 21 g)

Antenna

External dipole

*The 900MHz frequency 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.

†Although AC4490 radios will not talk to AC4424 radios, socket-compatibility allows for interchanging the

modules network-wide.

††Current consumption assumes 50% transmitter on-time.

RF PROTOCOL MODES

a) Communication

Unicast (one-to-one addressing)

Broadcast (one-to-multiple addressing)

b) Acknowledgement mode (ACK)

API with hardware and/or software

ACK indication

c) One-beacon mode

d) Dynamic radio data table:

Retains data from up to

12 radio modules

INTERFACE PROTOCOL

a) On-the-fly radio module configuration:

Destination address

RF transmit power

Co-located servers

RF channel

Broadcast/addressed

b) Raw data or transmit/receive API

c) 9-bit serial interface mode

d) Long range mode, enables

sensitivity control

e) Generic A/D, D/A generic I/Os

f) Variable baud rate

g) RF packet size, timeout control

h) Onboard temperature sensor

i) Handshaking, CTS/RTS,

full modem-mode available

j) In-range indicator

k) Error detection

Onboard CRC

Duplicate packet filtering

l) Data encryption standard (DES)

The details contained within the document are

subject to change. Download the product specification

from www.lairdtech.com/wireless for the most current

specification.