ER400RS

LPRS Data Sheet Easy -Radio ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver RS & TRS TS The Easy-Radio ER400TS Transmitter, ER400RS Receiver and ER400TRS transceiver incorporate Easy- Radio technology to provide high performance, simple to use radio devices that can transfer data over a range of up to 250 metres Line Of Sight (LOS). Furthermore Easy-Radio technology allows frequency, data rate and power output to be optimised for customer specific applications. The embedded software reduces design and development time significantly. The modules operate on the Pan-European 433 to 434MHz frequency band from a 3.6V supply and are housed in space saving Single-In-Line (SIL) packages. This data sheet describes the electrical and physical characteristics of the device. Operation of the Easy Radio software and Timing Specifications are described later in this document. Further information is available in the Easy-Radio Demonstration Kit & Programming Software guide, which should be read in conjunction with this data sheet. Features Applications Crystal controlled synthesiser for frequency accuracy Handheld Terminals High sensitivity receiver typically -105dBm 38.4 Kbps Environmental Sense & Control 10mW Transmit Power Vehicle to Base Station Data Transfer Low operating Voltage - 3.6 Volts Single Lithium Cell Remote Data Acquisition Low power consumption: Receiver 13mA Electronic Point of Sale equipment Transmitter 23mA User programmable: Frequency of operation Data Rate Output Power Description The Easy-Radio ER400TS Transmitter, ER400RS Receiver and ER400TRS Transceiver utilise modern high performance FM (FSK) transmitter and receiver ICs combined with a flash programmable microprocessor and an internal voltage regulator. They are suited for general-purpose remote control and data telemetry applications within the European 433MHz ISM band. The receiver is provided with a Received Signal Strength Indicator (RSSI ) output that can be optionally used to measure received signal levels. The modules connect to any 50-Ohm antenna such as a whip, helical or PCB loop. Easy-Radio ER400TS, ER400RS & ER400TRS 1-1.doc Copyright LPRS 2003. March2004 Page 1 of 15 LPRS Data Sheet Easy -Radio ER400TS Transmitter, ER400RS Receiver & ER400TRS Transceiver ER400TS Transmitter Figure 1 Block Diagram Figure 2 Physical Dimensions Pin Description Pin Name Description Notes No 1 RF Gnd RF ground. Connect to antenna ground (coaxial cable screen braid) and local ground plane. Internally connected to Pin 4 2 RF Out 50 Ohm RF output. Connect to suitable antenna See Note 3 Vcc Positive supply pin. +3.6 to +6.0 Volts. This should be a clean noise free supply with less than 25mV of ripple 4 Gnd Supply 0 Volt and Ground Plane 5 TXD Transmit Data Digital Input (SDI) 2 Notes 1. The module operates internally from an on board 3.3 Volt low drop regulator. 2. TXD input will be correctly driven by logic operating at 5 Volts (CMOS & TTL logic levels). Input should not be driven by an analogue output. Easy-Radio ER400TS, ER400RS & ER400TRS 1-1.doc Copyright LPRS 2003. March2004 Page 2 of 15