General Description

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.

Beneits and Features

● 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

● 3.0V to 5.5V Voltage Supply

● Independent Logic Supply

● Small, 3mm x 3mm 16-Pin TQFN Package