Synapse Wireless SM240 2.4 GHz Surface Mount RF Engine User Manual FCC Part 15

3998 FAU Blvd. Suite 310 Boca Raton, FL 33431 Tel: 561-961-5585 Fax: 561-961-5587

Certification Exhibit

FCC ID: U9O-SM240

IC: 7084A-SM240

FCC Rule Part: 15.247

IC Radio Standards Specification: RSS-210

ACS Project Number: 12-2121

Manufacturer: Synapse Wireless, Inc.

Model: SM240

User Manual

DATA SHEET

RF Engine

®

200 Series

Model Number: SM240

Part Numbers: SM240PP1

Document Revision v1.0

All Synapse products are patented or patent pending

Specifications are subject to change without notice – confirm that data is current

Synapse, the Synapse logo, SNAP, and Portal are all registered trademarks of

Synapse Wireless, Inc.

500 Discovery Drive

Huntsville, Alabama 35806

877-982-7888

Doc # 430154-01A

Model SM240 Data Sheet · Document Number 430154-01A · Page 2 of 12

Model SM240 Data Sheet · Document Number 430154-01A · Page 3 of 12

Table of Contents

1.0 SM240 OEM Module Overview 4

1.1 Specifications 5

1.2 Electrical Characteristics 6

1.3 Mechanical Drawings 7

1.4 Board Mounting Configurations 8

2.0 Agency Certifications 8

2.1 United States (FCC) 8

2.1.1 OEM Labeling Requirements 9

2.1.2 FCC Notices 9

2.1.3 FCC Approved Antennas 10

2.2 Canada (IC) 11

2.2.1 OEM Labeling Requirements 11

Model SM240 Data Sheet · Document Number 430154-01A · Page 4 of 12

1.0 RF Engine 200 Series

OEM Modules Overview

The RF Engine 200 Series (Model Number SM240) is an IEEE 802.15.4, low power,

highly-reliable solution to embedded wireless control and monitoring network needs that

require high data rates. The SM240 embeds Synapse’s SNAP OS, the industry’s first

Internet-enabled, wireless mesh network operating system into the Atmel

ATmega128RFA1 single-chip AVR® microcontroller with an integrated transceiver that

delivers up to 2Mbits/sec. These low-cost modules can have a range of up to three

miles and power consumption as low as 1.6 µA to enable a new generation of battery-

driven systems.

SNAP’s on-board Python interpreter provides for rapid application development and

over-the-air programming, while Atmel’s low-power RF single-chip design saves board

space and lowers the overall Bill of Materials and power consumption. The SM240 is

approved as an FCC Part 15 unlicensed modular transmitter. The modules provide up

to 16 channels of operation in the ISM 2.4GHz frequency band. The SM240 module

contains both a power amplifier for transmission and a low noise amplifier in the receive

path for extended range.

This Data Sheet details Part Numbers SM240:

• 20 GPIO and up to 7 A/D inputs

• 128k flash, 58.5k free for over-the-air uploaded user apps

• Two UART ports for control or transparent data which surmounts noisy

environments

• Low power modes: 1.6 µA with internal timer running

• Spread spectrum (DSSS) technology

• Socket-able or solder-able

• Up to 2 Mbps Data Rate

• 2.4 GHz RF Frequency

• Spread Spectrum (DSSS) technology

• Receive Amplifier (7 dBm) standard

• Transmit amplifier (15 dBm) for best-in-class range

• SM240: F-Antenna (2.5 miles LoS at 250Kbps)

Model SM240 Data Sheet · Document Number 430154-01A · Page 5 of 12

Figure 1.0 Block diagram showing the major subsystems comprising the SM240

1.1 Specifications

Table 1.0. SM240 Specifications

Performance

Outdoor LOS Range

Up to 2.5 miles at 250Kbps

Transmit Power Output

18.4 dBm

RF Data Rate

250Kbps, 500Kbps, 1Mbps, 2Mbps

Receiver Sensitivity

-107 dBm (1% PER)

Power Requirements

Supply Voltage

2.7 - 3.6 V

Transmit Current (Typ@3.3V)

80mA

Idle/Receive Current (Typ@3.3V)

20mA

Power-down Current (Typ@3.3V)

1.6uA

General

Frequency

ISM 2.4 GHz

Spreading Method

Direct Sequence (DSSS)

Modulation

O-QPSK

Dimensions

1.404" x 0.592"

Operating Temperature

- 40 to 85 deg C.

Antenna Option

F- antenna

Networking

Topology

SNAP

Error Handling

Retries and acknowledgement

Number of Channels

16

Available I/O UARTS with HW Flow Control

2 Ports - 8 total I/O

GPIO

20 total; 7 can be analog-in with 10bit ADC

Agency Approvals

FCC Part 15.247

FCC ID: U9O-SM240

Industry Canada (IC)

IC: 7084A-SM240

Model SM240 Data Sheet · Document Number 430154-01A · Page 6 of 12

1.2 Electrical Characteristics

Table 1.2. SM240 DC Characteristics

Symbol

Parameter

Condition

Min

Typ

1

Max

Units

V

CC

2

Supply Voltage 2.7 3.3 3.6 V

T

OP

Operating Temp -40 85 °C

V

IH

Input Hi Voltage All Digital Inputs V

CC

- 0.4 V

V

IL

Input Low Voltage All Digital Inputs 0.4 V

V

OL

Output Low Voltage All drive strengths

(2,4,6,8 mA)

0.4 V

V

OH

Output High Voltage All drive strengths

(2,4,6,8 mA) V

CC

- 0.4 V

IL

IN

In Leakage Current V

IN

=V

CC

or V

SS

, all Pins TBD uA

TX-I

CC

Transmit Current V

CC

= 3.3V 80 mA

RX-I

CC

Receive Current 20 mA

SHDN-I

CC

Sleep Current V

CC

= 3.3V 1.6 uA

1

All typical specifications are measured at 25°C.

2

Absolute maximum stress rated voltage for VCC is -0.3 to 3.6. It is recommended that a bulk decoupling capacitor (47 uF

tantalum rated at 6.3volts) be located close to the VCC pin 21 of the SM240 connector on host board.

Table 1.3. ADC Electrical Characteristics (Operating)

Symbol

Parameter

Condition

Min

Typical

Max

Unit

V

REFH3

Voltage Reference,

High Programmable 1.5 1.6 1.8 V

V

INDC

Analog input voltage Single Ended 0 1.8 V

Differential

4

0 3.3

3

V

REFH

is programmable to three fixed values; 1.5V, 1.6V, and 1.8V. The default is 1.6V.

4

Each differential analog input may be as high as 3.3V but the differential voltage is still limited.

Table 1.4. ADC Timing/Performance Characteristics

Symbol

Parameter

Condition

Min

Typical

Max

Unit

R

AS

Source impedance at input

5

3k kΩ

RES Conversion Resolution

Single Ended

CLKADC <=

4MHz

10

Bits

Single Ended

CLKADC >

8MHz

8

DNL Differential non-linearity V

REFH = 1.6V

CLKADC=4MHz

-0.5 LSB

INL Integral non-linearity V

REFH = 1.6V

CLKADC=4MHz

0.8 LSB

E

ZS

Zero-scale error 1.5 LSB

E

G

Gain error 1 LSB

5

Any analog source with a source impedance greater the 3kΩ will increase the sampling time.

Model SM240 Data Sheet · Document Number 430154-01A · Page 7 of 12

1.3 Mechanical Drawings

Figure 1.1 shows the PCB layout of the F antenna, and the keep out area for the F-

antenna.

Recommended Antenna:

Figure 1.1

The antenna pattern should be present on the top and bottom layer of the PCB. The

antenna patters should be connected by sufficient vias to maintain an impedance of 50

ohms. There should be no plane or trace on the inner layers between the antenna

patterns. In the antenna area, there should be no parts in the area between the edge of

the ground plane and the edge of the PCB on either side of the PCB.

A sample layer stack up which will yield the correct impedance is shown in Table 1.5.

The antenna is connected directly to the module by a 50 ohm trace (18.5mil width using

stack shown in Table 1.5), and connected by vias to the antenna on the opposite side at

the point in Figure 1.1 labeled “To Balun”. Example Gerber files are available.

In order to verify the completed design, connect a whip antenna with a known gain,

such as a Pulse P/N W1027, to a spectrum analyzer. Verify that the circuit radiates only

at the intended frequencies, and that spurious frequencies are below regulatory agency

limits. Regulatory certification will require testing at a licensed facility.

Production line testing should also include verification, with a spectrum analyzer, that

the unit is transmitting only in the intended frequency band.

Model SM240 Data Sheet · Document Number 430154-01A · Page 8 of 12

Table 1.5 – Sample PCB Layer Stackup

1.4 Board Mounting Considerations

The SM240 module is designed to mount directly onto the host board. Picture 1.1

shows an SM240 module plugged in to a host board.

Picture 1.1 shows the SM240 with PCB F antenna mounted to the host board.

SM240 Mounted

Picture 1.1 SM240 Mounted To Host Board

Model SM240 Data Sheet · Document Number 430154-01A · Page 9 of 12

2.0 Agency Certifications

2.1 United States (FCC)

The Model SM240 modules comply with Part 15 of the FCC rules and regulations.

Compliance with the labeling requirements, FCC notices and antenna usage guidelines

is required. In order to comply with FCC Certification requirements, the Original

Equipment Manufacturer (OEM) must fulfill the following requirements.

1. The system integrator must place an exterior label on the outside of the final

product housing the SM240 Modules. Figure 2.1 below shows the contents that

must be included in this label.

2. SM240 Modules may only be used with the antenna that has been tested and

approved for use with the module. Please refer to the antenna table provided in

this section.

2.1.1 OEM Labeling Requirements

NOTICE:

The OEM must make sure that FCC labeling requirements are met. This

includes a clearly visible exterior label on the outside of the final product housing that

displays the contents shown in Figure 2.1 below.

Figure 2.1 FCC Label

2.1.2 FCC Notices

WARNING: The SM240 modules have been tested by the FCC for use with other

products without further certification (as per FCC Section 2.1091). Changes or

modifications to this device not expressly approved by Synapse Wireless Inc. could void

the user’s authority to operate the equipment.

MANUFACTURERS NAME

BRAND NAME or TRADE NAME

Contains SM240 FCC ID: U9O-SM240

This device complies with Part 15 of the FCC Rules. Operation is subject to the following

two conditions: (1) This device may not cause harmful interferences, and (2) this device

must accept any interference received, including interference that may cause undesired

operation.

Model SM240 Data Sheet · Document Number 430154-01A · Page 10 of 12

WARNING: This device complies with Part 15 of the FCC Rules. Operation is subject

to the following two conditions: (1) This device may not cause harmful interferences,

and (2) this device must accept any interference received, including interference that

may cause undesired operation.

NOTICE: OEM’s must certify final end product to comply with unintentional radiators

(FCC Section 15.107 and 15.109) before declaring compliance of their final product to

Part 15 of the FCC Rules.

NOTICE: The SM240 modules have been certified for remote and base radio

applications. If the module will be used for portable applications, the device must

undergo SAR testing.

This equipment has been tested and found to comply with the limits for a Class B digital

device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide

reasonable protection against harmful interference in a residential installation. This

equipment generates, uses, and can radiate radio frequency energy and, if not installed

and used in accordance with the instructions, may cause harmful interference to radio

communications. However, there is no guarantee that interference will not occur in a

particular installation.

If this equipment does cause harmful interference to radio or television reception, which

can be determined by turning the equipment off and on, the user is encouraged to try to

correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and receiver.

• Connect the equipment into an outlet on a circuit different from that to which the

receiver is connected.

• Consult the dealer or an experienced radio/TV technician for help.

2.1.3 FCC Approved Antennas

The SM240 modules are FCC-approved for fixed base station and mobile applications.

The FCC requirement for mobile applications states that the antenna must be mounted

at least 20 cm (8 in) from nearby persons.

Notice: To reduce potential radio interference to other users, the antenna type and its

gain should be chosen so that the equivalent isotropically radiated power (e.i.r.p.) is not

more than that permitted for successful communication. The SM240 module has been

designed to operate with the antennas listed below in Table 2.1. The required antenna

impedance is 50 ohms.

Table 2.1. Approved FCC Antennas

Part Number Type Gain Application Min. Separation

N/A Inverted F PCB etch 0.0 dBi Fixed/Mobile 20 cm.

Model SM240 Data Sheet · Document Number 430154-01A · Page 11 of 12

RF Exposure WARNING: This equipment complies with FCC radiation exposure

limits set forth for an uncontrolled environment. This equipment should be installed and

operated with minimum distance 20cm between the radiator and your body. This

transmitter must not be co-located or operating in conjunction with any other antenna or

transmitter.

NOTICE: The preceding statement must be included as a CAUTION statement in OEM

product manuals in order to alert users of FCC RF Exposure compliance.

2.2 Canada (IC)

This device complies with Industry Canada license-exempt RSS standard(s). Operation

is subject to the following two conditions: (1) this device may not cause interference,

and (2) this device must accept any interference, including interference that may cause

undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio

exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne

doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage

radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Under Industry Canada regulations, this radio transmitter may only operate using an

antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry

Canada. To reduce potential radio interference to other users, the antenna type and its

gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not

more than that necessary for successful communication.

Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner

avec une antenne d'un type et d'un gain maximal (ou inférieur) approuvé pour l'émetteur par

Industrie Canada. Dans le but de réduire les risques de brouillage radioélectrique à l'intention des

autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope

rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une

communication satisfaisante.

This radio transmitter Model: SM240, IC: 7084A-SM240 has been approved by Industry

Canada to operate with the antenna types listed below with the maximum permissible

gain and required antenna impedance for each antenna type indicated. Antenna types

not included in this list, having a gain greater than the maximum gain indicated for that

type, are strictly prohibited for use with this device.

Le présent émetteur radio Model: SM240, IC: 7084A-SM240 a été approuvé par Industrie

Canada pour fonctionner avec les types d'antenne énumérés ci-dessous et ayant un gain

admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non

inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement

interdits pour l'exploitation de l'émetteur.

Model SM240 Data Sheet · Document Number 430154-01A · Page 12 of 12

Table 2.2. Approved IC Antennas

Part Number Type Gain Application Min. Separation

N/A Inverted F PCB etch 0.0 dBi Fixed/Mobile 20 cm.

2.2.1 OEM Labeling Requirements

Labeling requirements for Industry Canada are similar to those of the FCC. A clearly

visible label on the outside of the final product housing must display the contents shown

in Figure 2.2 below.

Figure 2.2 IC Label

NOTE: The OEM can choose to implement a single label combined for both FCC and

IC labeling requirements. If a combined single label is chosen, there must be a clearly

visible label on the outside of the final product housing displaying the contents shown in

Figure 2.3 below.

Figure 2.3 Combined FCC and IC Label

MANUFACTURERS NAME

BRAND NAME or TRADE NAME

MODEL:

Contains IC: 7084A-SM240

MANUFACTURERS NAME

BRAND NAME or TRADE NAME

Contains FCC ID: U9O-SM240

Contains IC: 7084A-SM240

This device complies with Part 15 of the FCC Rules. Operation is subject to the

following two conditions: (1) This device may not cause harmful interferences, and (2)

this device must accept any interference received, including interference that may cause

undesired operation.

Synapse Wireless SM240 2.4 GHz Surface Mount RF Engine User Manual FCC Part 15

Synapse Wireless Inc. 2.4 GHz Surface Mount RF Engine FCC Part 15

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