The MAX9947 is an AISG-compliant, fully integrated transceiver.
The MAX9947 receiver offers a typical dynamic range of 20dB and integrates a bandpass filter that operates in the 2.176MHz frequency with a narrow 200kHz bandwidth.
The MAX9947 transmitter integrates a bandpass filter that is compliant with the AISG spectrum emission profile. It can modulate OOK signals up to 115.2kbps. The
output power can be varied with external resistors from +7dBm to +12dBm to compensate for loss in the external circuitry and cabling.
The MAX9947 also features a direction output to facilitate the RS-485 bus arbitration in tower-mounted equipment. The MAX9947 is available in a small, 3mm x 3mm 16-pin TQFN and is rated for operation in the -40°C to +85°C
temperature range.
주요기능
애플리케이션/용도
Receiver Wide Input Dynamic Range
-15dBm to +5dBm in 50Ω
Variable Transmitter Output Level from +7dBm to +12dBm
AISG-Compliant Output Emission Profile
Autodirection Output
No Need of Microcontrollers to Handle Bus Arbitration in Tower-Mounted Equipment
Supports All AISG Data Rates
9.6kbps
38.4kbps
115.2kbps
Bandpass Filter Compliant with AISG Protocol Centered Around 2.176MHz
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