AC4490LR-200M Laird Technologies, AC4490LR-200M Datasheet - Page 23

• Manufacturer Part Number: AC4490LR-200M
• Description: TXRX 900MHZ 3.3-5.5V TTL 200MW
• Manufacturer: Laird Technologies
• Series: AeroCommr

Specifications of AC4490LR-200M

• Frequency: 902MHz ~ 928MHz
• Data Rate - Maximum: 115.2kbps
• Modulation Or Protocol: FHSS, FSK
• Applications: AMR, Fire & Security Alarms, Telemetry
• Power - Output: 5mW ~ 200mW
• Sensitivity: -110dBm
• Voltage - Supply: 3.3V, 5V
• Current - Transmitting: 68mA
• Data Interface: Connector, 2 x 10 Header
• Antenna Connector: MMCX
• Operating Temperature: -40°C ~ 85°C
• Package / Case: Module
• Output Power: 200 mW
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Memory Size: -
• Current - Receiving: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

AC4490 User’s Manual
should be a strong consideration when designing the system.
S Y S T E M T H R O U G H P U T
When operating as shown below, an AC4490 transceiver is capable of achieving the listed throughput. However, in
the presence of interference or at longer ranges, the transceiver may be unable to meet the specified throughput.
E N G I N E E R ’ S T I P
In High-density applications, what amount of latency should be expected?
It is not easy to predict the exact amount of latency in high-density applications. There are
many variables that affect system latency. The three variables that most affect the latency are
the network load, the distance between transceivers, and whether the transceivers are
operating in a broadcast or addressed mode. There is no fixed answer as to how much latency
will be introduced in the system when considering high-density applications. In these cases
we can just offer qualitative analysis of the latency in high-density applications. As the network
load increases, then the number of collisions that will occur increases. As the number of
collisions increase, then the system latency increases.
transceivers increases, so to does the system latency. Finally, when transceivers operate in
addressed mode they will retry sending a packet up to the number of time specified in the
transmit retry parameter specified in the EEPROM. As the number of retries increases, the
system latency will increase also.
One Beacon
Disabled
Disabled
Enabled
Enabled
Mode
T a b l e 8 : M a x i m u m S y s t e m T h r o u g h p u t
Parity Mode
Disabled
Disabled
Enabled
Enabled
www.aerocomm.com
Half Duplex Throughput
(bps)
38k
48k
19k
24k
As the distance between the
Full Duplex Throughput
(bps) each way
9.5k
19k
24k
12k
S E R I A L I N T E R F A C E
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