Analog Devices MAX9947 Product Info

• 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

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 +105°C temperature range.

Applications

• Base Stations
• Tower Equipment