STD-5030 pages

DSSS low power radio transceiver

STD-503 2.4GHz

Preliminary

The STD-503 is a 2.4 GHz transceiver enclosed in a small compact shield casing designed for industrial applications.
The transceiver uses Direct Sequence Spread Spectrum (DSSS) modulation and true diversity circuit, enabling reliable communications even
in the congested 2.4 GHz band.
The STD-503 complies with the European EN300 440, U.S FCC Part 15.247 and Japanese ARIB STD-T66 standard, making it ready for the
global market.
Low power consumption and battery operation give the STD-503 the performance demanded for applications where long range and
reliability are required.
The transceiver uses a transparent data interface to enable users to communicate using their own protocols.
The module s configuration can be set easily via the UART interface using dedicated commands.
*Circuit Design developed an onboard ASIC containing SS correlator (a key part of spread spectrum communication).
This ensures long term supply for industrial applications.

Features
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CE, FCC and ARIB conformity certification
Uses direct sequence spread spectrum (DSSS) modulation
Channel stepping option controlled via CHC pin
A true diversity receiver (two built-in receiver circuits)
Module settings using dedicated commands
Data communication uses a transparent interface
Low power operation
77 channels
Range 300m LOS
Onboard temperature sensor

Application
・ Industrial telecontrol
・ Telemetry Systems

Specification

Specification

Frequency range

2402.5 ~ 2478.5 MHz

Number of RF channels

77

Channel spacing

1 MHz

RF chip rate

288kcps

Modulation System

FSK

Supply voltage

3.3 ~ 5.5 V

Supply current

TX:65mA RX:65mA

RF output power

10mW

Receiver sensitivity

-93 dBm

Operating temp. range

-20 ~ +65C (storage -30 ~ +80C)

No dew condensation

Dimension

40 x 29 x 5 mm

Power/signal pin connectors excluded

Weight

10g

RF connectors

Interface

Parameter

MHF x 2

Remark

EIRP

Parameter

Specification

Remark

Data Interface (DI/DO)

19.2 kbps

Sync: CLK terminal

Command Interface (TXD / RXD)

UART communication (RS-232C)

- Communication method

Asynchronous

- UART bit rate

19200, 38400, 57600 bps

- Flow Control

None

- Other parameters

Data Length: 8 bits, Parity (None),Stop Bits 2

www.circuitdesign.jp
STD-503 ver1.0e Sep. 2014

Sales Division

7557-1 Hotaka, Azumino, Nagano 399-8303, Japan
Tel:+81-(0)263-82-1024
Fax:+81-(0)263-82-1016