2.4 GHz DSSS Transceiver 77ch | STD-502 | products

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STD-502-R

DSSS Low Power Radio TransceiverSTD-502-R

The STD-502-R 2.4 GHz transceiver uses direct sequence spread spectrum (DSSS) modulation and a true diversity circuit, enabling reliable communications even in the congested 2.4 GHz band.
The STD-502-R complies with the European ETSI EN300440, U.S. FCC Part 15.247, Canadian ISED RSS-210 standards and Japanese ARIB STD-T66, making it ready for the global market.

Low power consumption and battery operation give the STD-502-R 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 modules 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 communications) instead of relying upon conventional RFICs. This ensures long term supply for industrial applications.

Feature

CE, FCC, ISED and ARIB conformity certification
Uses direct sequence spread spectrum (DSSS) modulation
A true diversity receiver containing two built-in receiver circuits
Module settings using dedicated commands
Data communication using transparent interface
Low power operation
77 channels
300m (LOS) range

Applications

Industrial telecontrol
Telemetry Systems

Other products related to this product

STD-503

DSSS Low Power Radio Transceiver

STD-302Z

Channel Programmable Narrow Band FM Transceiver

LMD-401

High Performance Channel Programmable Transceiver

Specification

Common

Parameter	Specification	Remarks
Applicable standard	EN 300 440 FCC part 15.247 ARIB STD-T66 IC RSS-210
Communication method	Simplex
Transmission method	Direct sequence spread spectrum
Modulation method	FSK
Frequency	2402.5 to 2478.5 MHz
Number of RF channels	77
Channel spacing	1 MHz
Data bit rate	9.6 k / 19.2 kbps
Chip rate	144 k / 288 kcps
RF connectors	RP-SMA x 2	Nominal 50 ohm
Spreading code	15 Chips	M-sequence ( 111101010001100 )
Operating temperature range	-20 to +65 degree C	No dew condensation
Supply voltage	3.3 to 5.5 V DC
Supply current	TX: 55 mA typ. RX: 65 mA typ.
Dimension	50 x 30 x 9 mm	Not including connectors
Weight	24g

Transmitter Part

Parameter	Specification	Remarks
RF output power	< 10 mW	e.i.r.p.
TX data input	Digital L = 0 to 0.25 H = Vref – 0.4 to Vref

Receiver Part

Parameter	Specification	Remark
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	Remark
RF Data Interface
Port	DO / DI / CLK
Data bit rate	9.6 k / 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-502-R

STD-502-R

Data Sheet

Version 1.5

Operation Guide

Version 2.0

Certification

DoC(Declaration of Conformity) for RED
FCC
ISED

Application Notes

Channel plan for using multiple STD-502-R in the same area

TB-STD502

Operation Guide

Version 1.0

Evaluation Tools: TB-STD502

The TB-STD502 evaluation board allows you to evaluate our STD-502 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 tests and packet tests with packet error indication.

The boards do not include both modules STD-502. Please order them separately if needed.