Date: 20/01/2010

Single-chip AISG-compliant transceiver for base stations and tower-mounted equipment

Maxim has introduced the MAX9947, a new single-chip Antenna Interface Standards Group (AISG)-compliant transceiver that packs a transmitter, receiver, and active filters, which is 100x smaller than discrete designs. The MAX9947 transceiver provides an autodirection output to facilitate RS-485 bus arbitration in tower-mounted equipment without requiring a microcontroller, and suitable for the base stations and tower-mounted equipment.

AISG offers an interface protocol to enable intelligent antenna systems. The AISG specification allows digital remote control and monitoring of wireless infrastructure to optimize the network based on changing coverage requirements.

The key features of the MAX9947 transceiver are,

-15dBm to +5dBm in 50 Ohm
Resistor-adjustable output power (+7dBm to +12dBm) allows compensation for losses in external circuitry and cabling
AISG-compliant output emission profile
Supports all AISG data rates 9.6, 38.4, and 115.2kbps
Bandpass filter compliant with AISG protocol centered around 2.176MHz
Operating input voltage ranges from 3.0V to 5.5V

The transmitter includes an OOK modulator, a bandpass filter that is compliant with the AISG spectrum-emission profile, and an output amplifier. The receiver includes a bandpass filter that operates around the 2.176MHz center frequency with a narrow 200kHz bandwidth, it also includes an OOK demodulator and a comparator for reconstructing the digital signal.

Operating temperature range: -40°C to +85°C

Package: 3mm x 3mm, 16-pin TQFN package
Price: Starts at $4.25 for 1k pieces
Availability: Now

For more details visit www.maxim-ic.com/AISG-Transceiver