AC4490LR-200M Laird Technologies, AC4490LR-200M Datasheet - Page 41

• 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
W r i t e D i g it a l O u t p u t s
The OEM Host issues this command to write both digital output lines to
particular states.
Note: This command should only be used when Protocol Status (0xC2)
is not set to 0xE3.
W ri t e D A C
The OEM Host issues this command to write DA_Out to a particular
voltage.
generate the analog voltage. The theory behind a PWM is that a binary
pulse is generated with a fixed duty cycle and rate. As such, this pin
toggles between High & Low. This signal is filtered via an on-board R-C
circuit and an analog voltage is generated. Duty cycle specifies the
ratio of time in one cycle that the pulse spends High proportionate to
the amount of time it spends Low. So, with a duty cycle of 50% (0x80),
the pulse is High 50% of the time and Low 50% of the time; therefore the
analog voltage would be half of 3.3V or 1.15V. A broad filter has been
implemented on the transceiver and there is no advantage to using a
slower update period. Generally, a faster update period is preferred.
Se t M ax Powe r
The OEM Host issues this command to limit the maximum transmit
power emitted by the transceiver.
current consumption and satisfy certain regulatory requirements. The
radios are shipped at maximum allowable power.
L o n g R a ng e M o d e
The OEM Host issues this command to temporarily enable or disable
Long Range Mode in the transceiver.
Note: Only available on AC4490LR-200 / AC4490LR-1000 transceivers
with firmware v6.7+.
T r a n sm i t B u f f e r E m p t y
The OEM Host issues this command to determine when the RF transmit
buffer is empty. The Host will not receive the transceiver response until
that time.
The transceiver uses a PWM (Pulse Width Modulator) to
This can be useful to minimize
www.aerocomm.com
Command: <0xCC> <0x23> <Digital Out>
Number of Bytes Returned: 2
Response: <0xCC> <Digital Out>
Parameter Range:
<Digital Out>= bit-0: GO0
Command: <0xCC> <0x24> <Update> <Duty Cycle>
Number of Bytes Returned: 3
Response: 0xCC <Update> <Duty Cycle>
Parameter Range:
Command: <0xCC> <0x25> <Max Power>
Number of Bytes Returned: 2
Response: <0xCC> <Max Power>
Parameter Range:
<Max Power>= New Max Power setting
Command: <0xCC> <0x27>
Number of Bytes Returned: 2
Response: <0xCC> <Mode>
Parameter Range:
<Mode>
Command: <0xCC> <0x30>
Number of Bytes Returned: 2
Response: <0xCC> <0x00>
T
V
update
out
=
Data2
--------------- -
0xFF
=
(
------------------------------------------------- -
255
= 0x00: Disable Long Range Mode
×
bit-1: GO1
0x01: Enable Long Range Mode
×
3.3V
14.7456
(
C O N F I G U R I N G T H E A C 4 4 9 0
Data1
6
+
1
)
)
3 5