Bubec UM2455 User Manual

UM2455

UM2455

M-Power500 Module User Manual

Application Note

AN-2455-06

The content of this technical document is subject to change without
notice. Please contact UBEC for further information.

All rights are strictly reserved. Any portion of this document shall not be reproduced, copied, or transformed
to any other forms without prior permission from Uniband Electronic Corp.

Version: 0.0

Released Date: 2009/02/10

* AN-2455-06 <Rev. 0.0> page 1/ 11

UM2455

UM2455

M-Power500 Module User Manual

1. General Information

The M-Power500 module satisfies the requirements of low-power and long-range wireless sensor applications.
It integrates UBEC’s UM2455 2.4GHz transceiver with UBEC’s RF front-end IC UP2268 to extend the
transmitting and the receiving distance at low current consumption. Both the low current consumption and
long distance capability are especially suitable for battery-limited applications. The module’s flexible and
reliable interface allows the users to develop configurations appropriate for their applications.

The M-Power500 module, derived from UBEC’s M-stamp module, operates within the ISM 2.4 – 2.5 GHz
frequency band and contains UBEC’s UM2455, UP2268 and other necessary components such as crystal
oscillator, inductors and capacitors. The transceiver within the UM2455 chip features a maximum of 5 MHz
serial interface SPI bus for control and data transfer. It is a simple SPI interface slave device consisting of a
4-wire bus (SCLK, SI, SO, and SEN) that provide accesses to various subunits such as MAC/BB/RF
control/status registers, TXFIFOs, RXFIFOs and security key table.

The UP2268 is an RF front-end IC integrating a high-efficiency, linear power amplifier (PA), a switch and a low
noise amplifier (LNA). Its low current consumption and inherent power gain enable the designers to meet the
challenges of the battery operation and long distance requirements demanded by many applications. In
addition, the small module form factor (QFN3x3) saves the valuable board space.

2. Features

 ISM band 2.405~2.480 GHz operation
 3.0~3.6V Operation
 Sleep Current: 3uA (typical)
 >500m Range (Environment dependent)
 Chip Antenna
 Receiver Sensitivity: -101dBm
 TX Power : 10dBm
 TX Current : 54mA
 RX Current : 26mA
 Size: 38.35mmx 14.00mm

* AN-2455-06 <Rev. 0.0> page 2/ 11

UM2455

Figure 1 shows the top view of a M-Power500 with a chip antenna. The PCB size is 38.35mm x 14.00 mm.

Figure 1. M-Power500 Module

3. Pin Configuration

UM2455 M-Power500 module pin assignments and their functions are described below.

Pin Number Pin Name Type Description

1 NC NC NC
2 NC NC NC
3 NC NC NC
4 GPIO0 DIO General purpose digital I/O, also used as an external

PA enable
5 RESETN DI Global hardware reset pin, active low
6 WAKE DI External wake up trigger, active high / low can be

programmable.
7 INT DO Interrupt pin to micro-processor :

Level trigger, Hi / Low programmable
8 SO DIO Serial interface data output from UM2455 or I2C clock
9 SI DIO Serial interface data input to UM2455 or I2C data

in/out
10 SCLK DI Serial interface clock
11 SEN DI Serial interface enable
12 NC NC NC
13 NC NC NC
14 NC NC NC
15 NC NC NC
16 CLKOUT DIO 20/10/5/2.5 MHz Clock output
17 GND Ground Ground
18 VCC Power 3V
19 VCC Power 3V
20 GND Ground Ground
21~31 NC NC NC

* AN-2455-06 <Rev. 0.0> page 3/ 11

UM2455

UM2455 M-Power500 module pin names and pin number allocation map are shown in Figure 2.
It can interface with other devices such as a sensor, an LED, a host controller, a push button, a joystick or
power relays through GPIO signals.

Figure 2. M-Power500 Module Pin Names and Location Map

* AN-2455-06 <Rev. 0.0> page 4/ 11

UM2455

4. Electrical Specifications

Item Conditions

Specifications

Unit

Min. Typ. Max.

Frequency Range 2.405 2.480 GHz

Input Voltage 3.0 3.6 V

Current Consumption (TX) 3V, P

Current Consumption (RX) 3V,

TX Output Power

TX EVM

3V,
P

3V,
P

=10dBm 54 mA

out

(UM2455)=0dBm

out

(UM2455)=0dBm

out

26

10 dBm

10 18 %

mA

RX Sensitivity 3V, PER<=5% -100 dBm

Communication Range 3V, PER<=5%, LOS 500 m

For detailed functional descriptions and electrical characteristics of the UM2455 chip, please refer to UM2455
datasheet, DS-2455-01.

4.1. TX Output Power

12

10

8

6

dBm

TX P ower

4

2

0

2405 2410 2415 2420 2425 2430 2435 2440 2445 2450 2455 2460 2465 2470 2475 2480

Frequence (MHz)

Figure 3. TX Output Power

* AN-2455-06 <Rev. 0.0> page 5/ 11

4.2. TX EVM

30

25

20

%

15

10

5

0

2405 2410 2415 2420 2425 2430 2435 2440 2445 2450 2455 2460 2465 2470 2475 2480

UM2455

EVM

4.3. RX Sensitivity

-80

-85

-90

-95

dBm

-100

-105

Frequence (MHz)

Figure 4. TX EVM

Sensitivity

-110

2405 2410 2415 2420 2425 2430 2435 2440 2445 2450 2455 2460 2465 2470 2475 2480

Frequence (MHz)

Figure 5. RX Sensitivity

* AN-2455-06 <Rev. 0.0> page 6/ 11

UM2455

5. Schematic

The schematic below is suitable for operation with a bias voltage between 3.0 and 3.6V. If a lower bias voltage
between 2.7 and 3.0V is desired, certain resistors in this schematic have to be replaced. Please consult UBEC
for further information.

RF4

C3

RF1

LOOP _C

VDD_C P

VDD_PL L

XTAL_P

XTAL_N

VDD_A

VDD_B G

1pF

RF3

L2

4.7nH

C6

0.5pF

L3

7.5nH

10nF

C1

VCC

L1

4.7nH

33

GND

C11 100pF

32
31
30
29
28
27
26
25

U3

VCC

C10

10nF

GS

C8

27pF

SG

X1

20MHz

C9

47pF

47pF

C7

C7

VCC

27pF

R4 0R/NA

C4

0.5pF

ANT1

C13

NC

L10

1.8nH

0R

1pF

9

C29

NC

C30

0.5pF

TL

3pF

1nH

C24

330pF

C21

0.1uF

8

RF15

RF14

RF_PA

L8

1nH

TL

7

C31

TL

L9

TL

VCC

PA_Vcc

6

PA_Vcc

5

PA_Vb

RF16

C32

NC

PA_VL

2268-EXT

4

VCC

C33

NC

R2 1K

TXENRXEN

ANTENNA

2.2nH

L4

R5

R3 0R/NA

TXEN

TL

C16

RF10

TL

C17

PA_VL11RF_ANT10LNA_VL

NC

2

12

RF_LNA

LAN_i n

LNA_VL

LNA_Vb

LNA_Vc c1

LNA_out

1

TL2

RF5

TL

C18 47pF

TL

RX in

47pF

RF11

TL

L5

1nH

TL1

13

RF12

14

15

16

TL4

2nH

TL

L7

3.9nH

C23

330pF

C20

0.1uF

RF13RF7RF15

TL

GND

GND

17

PA_in

3

TL3

RF6

C25 39pF

TL

TXout

RESETN

WAKE

WAKE

INT

INT

SO

SO

SI

SI

SCLK

SCLK

SEN

SEN

RXEN

R1

1.5K

R2 1K

C19

0.1uF

L6

VCC

C22

330pF

U1

VCC

RXEN

9

GPIO2

10

RESTn

11

WAKE

12

INT

13

SO

14

SI

15

SCLK

16

SEN

UM2455

VCC

RF2

GPIO0

TXEN

8

VDD_RF11RF_P2RF_N3VDD_RF24VDD_GR5GND_GR6GPIO07GPIO1

VDD_VC O

XTAL32_N

XTAL32_P

CLK_OUT

SCAN_EN

SCAN_M

VDD_D17GND_D

SPI/I 2C

19

24

22

18

20

21

23

10nF

C35

VCC

CLKOUT_20M

REFERENCE ONLY

CLKOUT_20M

Reference Only

3

OUT11GND2OUT2

VA

IN

5

6

RXEN

RF4

RXEN

S1

VB

4

TXEN

C26

15p F

TXEN

AS179-92

C27

15p F

CLKOUT

17

CONN PCB 31

181819192020212122222323242425252626272728282929303031

C2

10uF

C5

100nF

VCC

RESETN

WAKE

GPIO0

SCLK

SEN

SI

INT

SO

SCLK

SEN

RESETN

GPIO0

INTSOSI

WAKE

J1

112233445566778899101011111212131314141515161617

31

* AN-2455-06 <Rev. 0.0> page 7/ 11

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6. Mechanical Dimension

Figure 6. Module Dimensions

* AN-2455-06 <Rev. 0.0> page 8/ 11

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7. Antenna Topology

Notice:

(1) Antenna should be put on the edge of the system.
(2) Be sure that there is no obstacles (components and ground ) in the radiation direction
(3) Do not put any ground plane and/or circuit beneath the antenna region for the system boards.

Figure 7. Recommended Antenna Location

Figure 8. Example of Poor Antenna Locations

* AN-2455-06 <Rev. 0.0> page 9/ 11

Revision History

Revision Date Description of Change

UM2455

0.0 2009/02/10

Initial release

* AN-2455-06 <Rev. 0.0> page 10/ 11

Contact UBEC:

Headquarters
Address: 6F-1, No. 192, Dongguang Rd., Hsinchu, 300 Taiwan
Tel: [phone]
Fax:[phone]
Website: http://www.ubec.com.tw

Sales Services
Tel: [phone]
Fax:[phone]
E-mail: [e-mail]

FAE Services
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]

UM2455

DISCLAIMER

ALTHOUGH TO THE BEST KNOWLEDGE OF THE UNIBAND ELECTRONIC CORPORATION (UBEC) THIS
DOCUMENT IS ADEQUATE FOR ITS INTENDED PURPOSES, UBEC MAKES NO WARRANTY OF ANY KIND WITH
REGARD TO ITS COMPLETENESS AND ACCURACY. UBEC EXPRESSLY DISCLAIMS ANY AND ALL OTHER
WARRANTIES, WHETHER EXPRESSED, IMPLIED, OR STATUTORY INCLUDING WITHOUT LIMITATION
WARRANTIES OF TITLE, MERCHANTABILITY, NON-INFRINGENT, AND FITNESS FOR A PARTICULAR PURPOSE,
WHETHER ARISING IN LAW, CUSTOM, CONDUCT OR OTHERWISE.

* AN-2455-06 <Rev. 0.0> page 11/ 11