DSSS Low Power Radio TransceiverSTD-503

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, Canadian ISED RSS-210 and Japanese ARIB STD-T66, 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

CE, FCC, ISED 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
Communication LOS: 300 m
Onboard temperature sensor

Applications

Industrial telecontrol
Telemetry Systems

Other products related to this product

STD-502-R

DSSS Low Power Radio Transceiver

STD-302Z

Channel Programmable Narrow Band FM Transceiver

LMD-401

High Performance Channel Programmable Transceiver

Specifications

Common

Parameter	Specification	Remarks
Applicable standard	EN 300 440 FCC part 15.247 ARIB STD-T66 ISED RSS-210
Communication method	Simplex
Transmission method	Direct sequence spread spectrum
Emission type	F1D	FSK
Frequency	2402.5 to 2478.5 MHz
Channel spacing	1 MHz
Data bit rate	19.2 kbps
Chip rate	288 kcps
RF connectors	MHF x 2
Spreading code	15 Chips	M-sequence ( 111101010001100 )
Operating temperature range	-20 to +65 degree C	No dew condensation
Supply voltage	3.3 to 5.0 V DC	Absolute max. voltage 5.5 V
Supply current	48 mA typ. (TX) 55 mA typ. (RX)
Dimension	40 x 29 x 5.5 mm
Weight	10 g

Transmitter Part

Parameter	Specification	Remarks
RF output power	< 10 mW	e.i.r.p.
TX data input	Digital L = GND, H = Vref

Receiver Part

Parameter	Specification	Remarks
RF Input level	< -13 dBm
Receiver sensitivity	-93 dBm	19.2 kbps BER 0.1%
RX data output	Digital L = GND, H = Vref

Interface

Parameter	Specification	Remarks
RF Data Interface
Port	DO / DI / CLK
Data bit rate	19.2 kbps	Sync: CLK terminal
Command Interface
Port	TXD / RXD
Interface	UART communication (RS232C format)
Communication method	Asynchronous
UART bit rate	19.2 k / 38.4 k / 57.6 kbps
Flow control	None
Other parameters	Data length: 8 bits / Parity (None) / Stop bits 2

External View

STD-503

Data Sheet

Version 1.5

Operation Guide

Version 2.2

Certifications

DoC for CE (STD-503)
FCC (STD-503)
ISED (STD-503)

TB-STD503

Operation Guide

Version 1.0

Evaluation Tools: TB-STD503

The TB-STD503 evaluation board allows you to evaluate the STD-503 or STD-502-R module and perform range, data packet and switching signal transmission tests.
Onboard LEDs, CH switch, ID switch and push buttons allow you to easily make switching signal transmission tests and packet tests with packet error indication.

The TB-STD503 can also perform pre-programmed frequency hopping sequences by setting the onboard rotary switch.
The boards do not include modules STD-502-R / STD-503. Please order them separately if needed.