MAX11947GTP+ Analog Devices

Click here to ask about the production status of specific part numbers. MAX11947 4 Channel AISG Integrated Modem General Description Benefits and Features The MAX11947 is an AISG v2.0 and v3.0-compliant, fully AISG v3.0 Compliant integrated modem with a 4:1 multiplexer facilitating con- Fully Integrated Modem with 4:1 Multiplexer Facilitates nectivity between a single modem and up to four RF ports. Connectivity Between 1 Modem and Up to 4 Ports The MAX11947 receiver offers a typical dynamic range of Receiver Wide Input Dynamic Range 20dB and integrates a bandpass filter that operates at the -23dBm to +5dBm into 50 2.176MHz carrier frequency with a narrow 200kHz band- Adjustable Receiver Sensitivity Threshold from width and is fully compliant with the AISG spectral emis- -20.5dBm to -15dBm sion profile. It can modulate OOK signals at the required Adjustable Transmitter Output Level from -0.5dBm to 9.6kbps and up to 115.2kbps for back compatibility with +7.0dBm into 50 the older AISG standard. The output power can be varied AISG v3.0/v2.0 Compliant Output Emission Profile with an internal register setting from under 0dBm to over Autodirection Output +6dBm in order to compensate for loss in the external cir- No Need of Microcontrollers to Handle Bus Arbitration cuitry and cabling. The receiver sensitivity threshold is al- in Tower-Mounted Equipment so adjustable from the default -15dBm down to less than Support All AISG v2.0 Data Rates -20dBm to accommodate power loss through an external 9.6kbps (default) for AISG v3.0 splitter. The MAX11947 also features a direction output 38.4kbps and 115.2kbps for Backward Compatibility to facilitate the RS-485 bus arbitration in tower-mounted Bandpass Filter Compliant with AISG v3.0 Protocol equipment. The MAX11947 is available in a small, 4mm x Centered on 2.176MHz 4mm 20-pin TQFN and is rated for operation in the -40C 3.0V to 5.5V Voltage Supply to +105C temperature range. Independent Logic Supply Small, 4mm x 4mm 20-Pin TQFN Package Applications Base Station Single and Multi-Primary Controllers Ordering Information appears at end of data sheet. (SALD and MALD) Antenna Line Devices (ALDs) Antenna Arrays Tower-Mounted Amplifiers (TMAs) Smart Bias-Ts RS485 Half-Duplex Coaxial Links 2MHz OOK Modem Applications 19-100411 Rev 0 2/20MAX11947 4 Channel AISG Integrated Modem Simplified Block Diagram BIAS SYNCOUT XTAL1 /4 MOD CRYSTAL XTAL2 OSC P0 P1 DIR MUX P2 MODEM TXIN INTERFA P3 CE RXOUT DEMOD SDI SENS VCC SDO CTRL SPI GAIN CTRL INTERFA VL CSB BUFFER CE CTRL GND SCLK www.maximintegrated.com Maxim Integrated 2