AT48810

AT48810 Features Designed for use with Atmel’s AT48802 Spread-Spectrum Signal Processor FCC Part 15, Unlicensed Operation RF Despreading and Narrowband IF for Highest Jamming Margin 1 mW Narrowband Operation, or 1 and 50 mW Spread-Spectrum Operation Description The AT48810 RF module is intended for time domain duplex spread-spectrum communications under FCC Part 15, 902-928 MHz unlicensed operations. This module features RF despreading and narrowband IF for powerful interference rejection. Spreading is via direct sequence. The unit can also be operated in a narrow-band configuration (FCC limits power to 1 mW in narrow band) by restricting the DC voltage to the power amplifier so that the transmit power is less than 0 dBm per FCC regulations. The unit can also be run in slow half duplex or simplex mode. 900 MHz SpreadSpectrum RF Module Preliminary Pin Diagram 15.36 MHz Clock Out Ground VCC Synthesizer Data Clock Input Synthesizer Data Input Synthesizer Data Latch Input Modulation Input No Connection PN Spreading Enable Input PN Input 1 3 5 7 9 11 13 15 17 19 2 4 6 8 10 12 14 16 18 20 Audio Out Ground RSSI Out T/R Switch LNA Gain Hi/Low VCC No Connection Transmit Power On/Off Input Power Amp VCC Input Power Amp VCC Input Note: 1. Connector on module is Dupont/Berg part number 87814-610. Mating connector is 87409-110. 0625A 3-1 Block Diagram TX PWR GAIN LNA ON/OFF fC = 83.16 MHz Bw = 30 kHz fC = 1.23 MHz RSSI IF AMP DISCRIMINATOR AUDIO ANTENNA PORT DOWN CONVE...