LPR2430ER - RFM - Datasheet.Directory

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LPR2430ER

Rating Value Units

All Input/Output Pins -0.3 to +3.6 V

Non-Operating Ambient Temperature Range -40 to +85 oC

LPR2430ER Absolute Maximum Ratings

LPR2430ER Electrical Characteristics

Characteristic Sym Notes Minimum Typical Maximum Units

Operating Frequency Range 2405 2475 MHz

Operating Frequency Tolerance -300 300 kHz

Spread Spectrum Method Direct Sequence

Modulation Type O-QPSK

Number of RF Channels 15

RF Data Transmission Rate 250 kb/s

Symbol Rate Tolerance 120 ppm

RF Channel Spacing 5 MHz

Receiver Sensitivity, 10E-5 BER -95 dBm

Upper Adjacent Channel Rejection, +5 MHz 41 dB

Lower Adjacent Channel Rejection, -5 MHz 30 dB

Upper Alternate Channel Rejection, +10 MHz 55 dB

Lower Alternate Channel Rejection, -10 MHz 53 dB

Maximum RF Transmit Power 18 dBm

Transmit Power Adjustment 20 dB

Optimum Antenna Impedance 50 W

•2.4 GHz Spread Spectrum Transceiver Module

•Small Size, Light Weight, +18 dBm Transmitter Power

•Sleep Current less than 3 µA

•FCC, Canadian IC and ETSI Certified for Unlicensed Operation High Power

802.15.4

Module

The LPR2430ER 2.4 GHz transceiver module is a low cost, high-power solution for

peer-to-peer, point-to-point and point-to-multipoint wireless designs. LPR2430ER

modules provide the flexibility and versatility to serve applications ranging from cable

replacements to sensor networks. Based on the IEEE 802.15.4 wireless standard,

the LPR2430ER module is easy to integrate and provides robust wireless communi-

cations in applications where full mesh network operation is not required. The

LPR2430ER includes CNL V2.0 Network Layer firmware which features a flexible

and simple-to-use Application Programming Interface.

Shown with Shield Removed

DEVELOPMENT KIT

(Info Click here)

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Characteristic Sym Notes Minimum Typical Maximum Units

ADC Input Range 0 3.3 V

ADC Input Resolution 11 bits

ADC Input Impedance 55 MW

PWM Output Resolution* 8 16 bits

UART Baud Rate 1.2, 2.4, 4.8, 9.6 (default), 19.2,

28.8, 38.4, 57.6, 76.8, 115.2 kb/s

Digital I/O:

Logic Low Input Level -0.3 0.5 V

Logic High Input Level 2.8 3.3 V

Logic Input Internal Pull-up Resistor 20 KW

GPIO3 Logic Low Sink Current 20 mA

Power Supply Voltage Range VCC +3.3 +5.5 Vdc

Power Supply Voltage Ripple 10 mVP-P

Receive Mode Current 33 mA

Transmit Mode Current 130 mA

Sleep Mode Current 3µA

Operating Temperature Range -40 85 oC

*PWM0 has 8-bit resolution, PWM1 has 16-bit resolution. Built-in PWM output filters suppress ripple to 7 bits. Additional filtering

can be added externally.

LPR2430ER Electrical Characteristics

CAUTION: Electrostatic Sensitive Device. Observe precautions when handling.

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LPR2430ER Hardware

The major hardware component of the LPR2430ER is

the CC2430 IEEE 802.15.4 compatible transceiver

with integrated 8051 microcontroller. The LPR2430ER

operates in the frequency band of 2405 to 2475 MHz

at a nominal output power of 63 mW.

The LPR2430ER includes a low noise preamplifier in

the receiver path and a power amplifier in the transmit-

ter path, greatly increasing the operating range of the

CC2430. Two crystals are provided to operate the

CC2430, a 32 MHz crystal for normal operation and a

32.768 kHz crystal for precision sleep mode operation.

The LPR2430ER provides a variety of application

hardware interfaces including a UART interface, three

11-bit ADC inputs, two PWM (DAC) outputs, and six

general purpose digital I/O ports.

LPR2430ER Firmware

The main firmware components in the LPR2430ER in-

clude the 802.15.4 Media Access Control (MAC) layer

and the CNL V2.0 Networking Layer. CNL V2.0 sup-

ports up to 63 remotes. Network topologies include

point-to-point, point-to-multipoint and peer-to-peer.

CNL employs one-hop relay forwarding to mitigate

network transmission problems such as multipath fad-

ing. CNL includes provisions for low-power sleep

mode operation with periodic wakeup and report. The

CNL Application Programming Interface (API) pro-

vides an easy-to-use, flexible set of application com-

mands and functions. The API includes support for

send/receive serial data, read/write GPIO, read ADC

inputs, write PWM outputs and module configuration

services. In addition, CNL supports analog and digital

I/O binding, which maps an ADC measurement and

the states of two digital inputs on one LPR2430ER to

a PWM output and two digital outputs on another

LPR2430ER. See the LPR2430 Series Integration

Guide for complete details of the CNL API.

1 8 1 9 2 0 2 1 2 2 2 31 71 6 2 4 2 5 2 6

1 5

1 4

1 3

1 2

1 1

1 0

L P R 2 4 3 0 E R B l o c k D i a g r a m

2 7

C C 2 4 3 0

8 0 2 . 1 5 . 4

R a d i o a n d

M i c r o c o n t r o l l e r

R e g

F i l t e r

G N D

A C T I V I T Y

L I N K

G P I O 0 ( A D C _ R E F )

R A D I O _ T X D

R A D I O _ R X D

/ H O S T _ C T S ( G P I O 4 )

/ H O S T _ R T S ( G P I O 5 )

P W M 0

G P I O 2 ( P W M 1 )

G P I O 1

G P I O 3 ( R S 4 8 5 _ E N )

P W M 1 ( G P I O 2 )

V C C

G N D

2 9

+ 3 . 3 V

R F I O

3 2 M H z3 2 . 7 6 8 k H z

G N D

/ R E S E T

ADC1

R S D V

ADC2

ADC_VDD

N C

S w i t c h

T / R

P W R

P R E

F i l t e r

ADC0

+ 3 . 3 V

3 0

2 8

T X / R X

C o m b i n e r

Figure 1

Pin Name I/O Description

1 GND - Power supply and signal ground. Connect to the host circuit board ground.

2 ACTIVITY O RF activity indicator. Output pulses high when a packet is sent or received.

3 LINK O Link indicator. Output is high when the radio has successfully joined a network.

4GPIO0

(ADC_REF) I/O Configurable digital I/O port 0. When configured as an output, the power-on state is also configurable. This pin can also

be configured as a reference voltage input for the ADCs, 0 to 3.3 V, 1.25 V typical.

5 RADIO_TXD O Serial data output (UART) from the radio to the host.

6 RADIO_RXD I Serial data input (UART) from the host to the radio.

7GPIO4

(/HOST_CTS ) I/O

Configurable digital I/O port 4. When configured as an output, the power-on state is also configurable. Also configurable

as UART flow control output. The LPR2430 sets this line low to indicate it is ready to accept data from the host on the

RADIO_RXD input. When the LPR2430 sets this line high, the host must stop sending data. The default state is GPIO4.

8GPIO5

(/HOST_RTS) I/O

Configurable digital I/O port 5. When configured as an output, the power-on state is also configurable. Also configurable

as UART flow control input. The host sets this line low to allow data to flow from the RADIO_TXD pin. When the host sets

this line high, the LPR2430 will stop sending data to the host. The default state is GPIO5.

9 PWM0 O Pulse-width modulated output 0 with internal low-pass filter. Provides a DAC function, 0 to 3.3 V.

10 GPIO2

(PWM1) I/O Configurable digital I/O port 2. When configured as an output, the power-on state is also configurable. This pin is con-

nected to the input of the low-pass filter driving Pin 13, and is also configurable as a PWM output.

11 GPIO1 I/O Configurable digital I/O port 1. When configured as an output, the power-on state is also configurable.

12 GPIO3

(RS485_EN) I/O

Configurable digital I/O port 3. When configured as an output, this high current port can sink up to 20 mA. The power-on

output state is also configurable. Can also be configured as active low transmit enable for controlling an RS485 or other

half-duplex bus driver.

13 PWM1

(GPIO2) OGPIO2 (Pin 10) drives this pin through a low-pass filter. Provides a DAC function when GPIO2 is configured as a PWM

output.

14 VCC I Power supply input, +3.3 to +5.5 Vdc.

15 GND - Power supply and signal grounds. Connect to the host circuit board ground.

16 GND - Power supply and signal grounds. Connect to the host circuit board ground.

17 /RESET I Active low module hardware reset. Hold this input low when the power supply input is less than 3.3 Vdc. The module firm-

ware boots up and will accept commands about 3 seconds after this input goes high.

18 ADC0 I 11-bit ADC input 0. ADC full scale reading can be referenced to the module’s +3.3 V regulated supply, the ADC’s internal

+2.5 V reference, or ADC_REF (Pin 4).

19 ADC1 I ADC input 1. Same configuration options as ADC0.

20 RSVD - Reserved pin. Leave unconnected.

21 RSVD - Reserved pin. Leave unconnected.

22 RSVD - Reserved pin. Leave unconnected.

23 RSVD - Reserved pin. Leave unconnected.

24 ADC2 I ADC input 2. Same configuration options as ADC0.

25 ADC_VDD O Module’s +3.3 V regulated supply, used for ratiometric ADC readings. Current drain should be less than 5 mA.

26 NC - No connection.

27 NC - No connection.

28 GND - RF ground. Connect to the host circuit board ground plane, and to shield when using coaxial cable.

29 RFIO I/O RF port. Connect the antenna to this port with a 50 Wstripline or semi-rigid coaxial cable.

30 GND - RF ground. Connect to the host circuit board ground plane, and to shield when using coaxial cable.

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LPR2430ER I/O Pad Descriptions

RFIO Stripline

The RFIO pad on the radio module is connected directly to an antenna on the host circuit board, or to an MMCX

or similar RF connector. It is important that this connection be implemented as a 50 ohm stripline. Referring to

Figure 3, the width of this stripline depends on the thickness of the circuit board between the stripline and the

groundplane. For FR-4 type circuit board materials (dielectric constant of 4.7), the width of the stripline is equal to

1.75 times the thickness of the circuit board. Note that other circuit board traces should be spaced away from the

stripline to prevent signal coupling, as shown in Figure 4. The stripline trace should be kept short to minimize its

insertion loss.

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0 . 0 3

0 . 0 4

1 . 2

0 . 9 8 5

L P R 2 4 3 0 E R O u t l i n e a n d M o u n t i n g D i m e n s i o n s

0 . 0 5

T o p V i e w

0 . 1 1

1 5

1 6 3 0

D i m e n s i o n s i n i n c h e s

Figure 2

C o p p e r

G r o u n d

P l a n e

C o p p e r

S t r i p l i n e

T r a c e

F R - 4 P C B

M a t e r i a l

C i r c u i t B o a r d S t r i p l i n e T r a c e D e t a i l

F o r 5 0 o h m i m p e d a n c e W = 1 . 7 5 * H

Figure 3 Figure 4

Trace Separation from

50 Ohm Microstrip

Length of Trace Run

Parallel to Microstrip

100 mil 125 mil

150 mil 200 mil

200 mil 290 mil

250 mil 450 mil

300 mil 650 mil

Reflow Profile

An example solder reflow profile for mounting the radio module on its host circuit board is shown in Figure 5.

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Figure 5

Note: Specifications subject to change without notice.

Part # M-2430-0004, Rev A