900 MHz
Spread-
Spectrum RF
Module
Preliminary
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 com-
munications 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 regula-
tions. The unit can also be run in slow half duplex or simplex mode.
0625A
15.36 MHz Clock Out
Ground
V
Synthesizer Data Clock Input
Synthesizer Data Input
Synthesizer Data Latch Input
Modulation Input
No Connection
PN Spreading Enable Input
PN Input
CC
2
4
6
8
10
12
14
16
18
20
1
3
5
7
9
11
13
15
17
19
Audio Out
Ground
RSSI Out
T/R Switch
LNA Gain Hi/Low
V
No Connection
Transmit Power On/Off Input
Power Amp V Input
Power Amp V Input
CC
CC
CC
Pin Diagram
Note: 1. Connector on module is Dupont/Berg part number 87814-610.
Mating connector is 87409-110.
AT48810
3-1