Datasheet ZDM-A1281 Datasheet (MESHNETICS)

ZigBit™ OEM Modules

ZDM-A1281-*

Ultra-Compact 2.4GHz 802.15.4/ZigBee Modules

for Wireless Networking Applications

Product Datasheet

D

OC. M-251~01 V.1.8 WWW.MESHNETICS.COM MARCH 2007

© 2007 MeshNetics

ZigBit™ OEM Modules Product Datasheet

T able of Content s

Summary .............................................................................................................................................................3

Applications ........................................................................................................................................................3

Key features........................................................................................................................................................3

Benefits................................................................................................................................................................3

ZigBit™ Module Overview .................................................................................................................................4

Specifications .....................................................................................................................................................5

Absolute Maximum Ratings***..........................................................................................................................6

Physical/Environmental Characteristics and Outline.....................................................................................7

Pin Configuration................................................................................................................................................8

Mounting Information.......................................................................................................................................12

Sample Antenna Reference Designs..............................................................................................................13

Technical Support ............................................................................................................................................20

Development Support ......................................................................................................................................20

Ordering Information........................................................................................................................................21

Related Documents..........................................................................................................................................21

Disclaimer..........................................................................................................................................................21

Trademarks .......................................................................................................................................................21

Contact Information..........................................................................................................................................22

© 2007 MeshNetics Page 2 of 22

ZigBit™ OEM Modules Product Datasheet

Summary

ZigBit is an ultra-compact, low-power, high-sensitivity 2.4GHz 802.15.4/ZigBee OEM module from MeshNetics,
based on the innovative Atmel’s mixed-signal hardware platform. It is designed for wireless sensing, control and
data acquisition applications. The ZigBit module eliminates the need for costly and time consuming RF
development, and shortens time to market for a wide range of wireless applications.

Two different versions of ZigBit modules are available: ZDM-A1281-B0 module with balanced RF port for
applications where the benefits of PCB or external antenna can be utilized, and ZDM-A1281-A2 module with chip
antenna satisfying the needs of size sensitive applications.

Applications

ZigBit features standards-based networking stack, based on IEEE802.15.4 PHY and MAC layers, and ZigBee
NWK/APS/ZDO layers. It enables multipoint, multihop communications over an area of thousands of square meters
at moderate data rates without expensive infrastructure support. The architecture of the Wireless Sensor Networks
(WSN) allows for use of low powered devices. The applications include, but are not limited to:

• Building automation & monitoring

• Lighting controls

• Wireless smoke and CO detectors

• Structural integrity monitoring

• HVAC monitoring & control

• Inventory management

• Environmental monitoring

• Security

• Water metering

• Industrial monitoring

• Machinery condition and performance monitoring

• Monitoring of plant system parameters such as

temperature, pressure, flow, tank level, humidity,
vibration, etc.

• Automated meter reading (AMR)

Key features

• Ultra compact size (24 x 13.5 mm for
ZDM-A1281-A2 module and 18,8 x 13.5 mm for
ZDM-A1281-B0 module)

• Innovative (patent-pending) balanced chip antenna
design with antenna gain of approximately 0 dBi
(for ZDM-A1281-A2 version)

• High RX sensitivity (-101 dBm)

• Outperforming link budget (104 dB)

• Up to 3 dBm output power

• Very low power consumption

(<6 µA in deep sleep mode)

• Ample memory resources (128 kBytes of flash
memory, 8 kBytes RAM, 4 kBytes EEPROM)

• Wide range of interfaces (both analog and digital):

• 10 spare GPIO, 2 spare IRQ lines

• 4 ADC lines

• UART with CTS/RTS control

2

• I

C, USART/SPI

• Up to 30 lines can be configured as GPIO

• Capability to write own MAC address into the

EEPROM

• Optional antenna reference designs

• IEEE 802.15.4 compliant

• 2.4 GHz ISM band

• eZeeNet embedded software, including UART

bootloader and AT command set

Benefits

• Less physical space constraints

• Best-in-class RF link range

• Longer battery life

• Easy prototyping with 2-layer PCB

• More memory for user software application

• Mesh networking capability

• Easy-to-use low cost Evaluation Kit

• Single source of support for HW and SW

• Worldwide license-free operation

© 2007 MeshNetics Page 3 of 22

ZigBit™ OEM Modules Product Datasheet

ZigBit™ Module Overview

ZigBit is a low-power, high-sensitivity IEEE802.15.4/
ZigBee OEM module. This multi-functional device
occupies less than a square inch of space, which is
comparable to a typical size of a single chip. Based on a
solid combination of Atmel’s latest AVR Z-Link hardware
platform [1], the ZigBit offers superior radio performance
with exceptional ease of integration.

ZigBit fully satisfies the requirements of the “Directive
2002/95/EC of the European Parliament and the Council
of 27January 2003 on the restriction of the use of certain
hazardous substances in electrical and electronic
equipment” (RoHS). MeshNetics provides fully compliant
product in all regions where the directive is enforced July
1, 2006.

The ZigBit contains Atmel’s ATmega1281V
Microcontroller [1] and AT86RF230 RF Transceiver [2].
The module features 128kb flash memory and 8 kb RAM.

The ZigBit already contains a complete RF/MCU-related
design with all the necessary passive components
included. The module can be easily mounted on a simple
2-layer PCB. Compared to a single-chip, a module-based
solution offers considerable savings in development time
& NRE cost per unit during the design & prototyping
phase. No RF expertise is required.

Innovative (patent-pending) chip antenna design in ZDM­A1281-A2 module eliminates the balun and achieves
good performance over ZigBee frequency band.

MeshNetics provides tools for building ready-to-use
applications around the ZigBit module. The Evaluation
Kit and the Development Kit help prototyping and testing
an 802.15.4 or ZigBee networking solution. It includes
the sensor boards with multiple interfaces, an out-of-the­box data acquisition software suite, as well as
accessories and documentation. The sample sensor data
acquisition application allows network monitoring and
data collection, all visualized via graphic interface.

The ZigBit modules come bundled with the eZeeNet
networking firmware. The eZeeNet enables the module­based OEM products to form self-healing, self-organizing
mesh networks. The eZeeNet stack conforms to
IEEE802.15.4/ ZigBee specifications [3], [4], [5].

Depending on your design requirements, you can use
the ZigBit to operate a sensor node, where it would
function as a single MCU. Or you can pair it to a host
processor, where the module would serve essentially as
a modem.

In the former case, a user application should be bundled
with the eZeeNet software. The eZeeNet’s programming
interface gives users flexibility to manage network and
minimize power consumption.

In the latter case, the host processor can control data
transmission and manage module peripherals via
powerful set of AT commands. This way, a minimum
engineering effort for development of customer’s devices
is required. Additionally, the sensors can be connected

USART/SPI

IRQ

UART

USART/SPI

I2C

JTAG

Analog

IRQ

UART

I2C

JTAG

Analog

ZDM-A1281-B0 Block Diagram

VCC (1.8 – 3.6V)

ATmega1281

Micro

controller

SPI BusGPIO

AT86RF230

Transceiver

ZDM-A1281-A2 Block Diagram

VCC (1.8 – 3.6V)

ATmega1281

Micro

controller

AT86RF230

RF

Transceiver

SPI BusGPIO

eZeeNet™ Block Diagram

RF

Chip

Antenna

RF I/O

© 2007 MeshNetics Page 4 of 22

ZigBit™ OEM Modules Product Datasheet

)

A

A

directly to the module, thus expanding the existing set of sensor interfaces. The over-the-air control via AT­commands makes debugging and network testing easier. It also enables wireless module configuration during OEM
mass-production process and provides flexible commissioning protocol for installation and maintenance of ZigBit­based devices.

The eZeeNet is compact private profile software from MeshNetics that is specifically tailored for data acquisition
applications. It allows optimizing the network traffic, reducing power consumption, scheduling, and smart power
management. The eZeeNet software comes with a set of drivers for standard peripherals (I

2

C, GPIO, ADC, etc.) that

ensure the ZigBit module easy integration.

Specifications

Test Conditions (unless otherwise stated): Vcc= 3 V, f=2.45 GHz, T

Module Operating Conditions

Parameters Range Unit Condition

Supply Voltage (V

1.8 to 3.6 V

cc

Current Consumption: RX mode 19 m
Current Consumption: TX mode 18 m
Current Consumption: Radio is turned off,

14 mA see Note

MCU is active for 50% of the time.
Current Consumption: Power Save mode 6

Note: Parameters specified above are measured under the following conditions:

• eZeeNet software is running at 4 MHz clock rate, DTR line management is turned off

• all interfaces are set to the default state (see Pin Assignment Table)

• output TX power is 0 dBm

• JTAG is not connected

• V

= 3.0 V

cc

• actual current consumption depends on multiple factors, including but not limited to the board

design and materials, extra MCU load by user application, peripherals usage, EEPROM
reading/writing, eZeeNet settings, network activity and so on.

= 25 °C

amb

µA

see Note
see Note

see Note

RF Characteristics

Parameters Range Unit Condition

Frequency Band 2.400 to 2.4835 GHz
Number of Channels 16
Channel Spacing 5MHz
Transmitter Output Power -17 to +3 dBm Adjusted in 16

steps

Receiver Sensitivity - 101 dBm PER = 1%
Maximum RX Input Level -8 dBm PER = 1%
On-Air Data Rate 250 kb/s
TX Output / Rx Input Nominal Impedance 100 Ohms

© 2007 MeshNetics Page 5 of 22

ZigBit™ OEM Modules Product Datasheet

y

(

ATmega1281V Microcontroller Characteristics

Parameters Range Unit Condition

On-Chip Flash Memory Size 128 kBytes
On-Chip RAM Size 8 kBytes
On-Chip EEPROM Size 4 kBytes
Operation Frequenc

4MHz

Module Interfaces Characteristics

Parameters Range Unit Condition

UART Maximum Baud Rate 38.4 kb/s
ADC Resolution / Conversion Time 10 / 200

ADC Input Resistance 100 MOhm
ADC Reference Voltage (Vref) 1.0 to Vcc-0.3 V
ADC Input Voltage
I2C Maximum Clock 222 kHz
GPIO Output Voltage (High/Low) 2.3 / 0.5 V
Real Time Oscillator Frequency 32.768 kHz

0 ÷ Vref

Bits / µs

V

In the single
conversion mode

-10 / 5 mA)

Absolute Maximum Ratings***

Parameter Min Value Max Value

Voltage of any Pin except RESET with respect to -0.5 V Vcc + 0.5 V
Voltage on RESET with respect to Ground -0.5 V +13.0 V
DC Current per I/O Pin 40 mA
DC Current D_VCC and DGND Pins 200 mA
Input RF Level +10 dBm

***Absolute Maximum Ratings are the values beyond which damage to the device may occur. Under no
circumstances must the absolute maximum ratings given in the following table be violated. Stresses beyond those
listed under “Absolute Maximum Ratings” may cause permanent damage to the device.

This is a stress rating only and functional operation of the device at these or other conditions, beyond those
indicated in the operational sections of this specification, is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.

****Caution! ESD-sensitive device. Precaution should be used when handling the device in order to prevent
permanent damage.

© 2007 MeshNetics Page 6 of 22

ZigBit™ OEM Modules Product Datasheet

V

g

g

Physical/Environmental Characteristics and Outline

Parameter

alue Notes

Size 18.8 x 13.5 x 2.8 mm ZDM-A1281-B0

24.0 x 13.5 x 2.8 mm ZDM-A1281-A2

Weight 1.3

1.5

ZDM-A1281-B0
ZDM-A1281-A2

Operating Temperature Range -20°C to +70°C -40°C to +85°C operational*

ZDM-A1281-B0 Mechanical Drawing

±0,2

18,8

±0,2

17,3

118

1925

±0,2

±0,2

12,0

13,5

44 48

26 43

All dimensions are in millimeters

1925

±0,2

±0,2

12,0

13,5

26 43

All dimensions are in millimeters

17,3

1,0 typ

-0.2

0,8

1,0 typ

±0,1

0,7

±0,1

2,0

ZDM-A1281-A2 Mechanical Drawing

±0,2

24,0

±0,2

118

-0.2

0,8

±0,1

0,7

±0,1

2,0

*

Minor degradation of clock stability may o ccur

© 2007 MeshNetics Page 7 of 22

Pin Configuration

GPIO3
GPIO4
GPIO5
DGND

DGND
D_VCC
D_VCC

ZigBit™ OEM Modules Product Datasheet

ZDM-A1281-B0 Pinout

UART_CTS

UART_RTS

UART_RXD

GPIO6

GPIO7

1925
2021222324

UART_TXD

I2C_DATA

CPU_CLK

I2C_CLK

OSC32K_OUT

RESET

DGND

GPIO0

GPIO1

GPIO2

SPI_MISO

SPI_CLK

SPI_MOSI

118

234567891011121314151617

RF_GND

4847464544

RFN_IO
RF_GND
RFP_IO
RF_GND

GPIO3
GPIO4
GPIO5

DGND

DGND
D_VCC
D_VCC

26 3433323130292827 35 42414039383736

BAT

JTAG_TDI

JTAG_TCK

JTAG_TDO

JTAG_TMS

UART_CTS

UART_RTS

GPIO6

GPIO7

1925
2021222324

26 3433323130292827 35 42414039383736

ADC_INPUT_3

UART_RXD

ADC_INPUT_2

UART_TXD

ADC_INPUT_1

I2C_DATA

I2C_CLK

43

IRQ_6

USART0_EXTCLK

GPIO8

IRQ_7

AGND

GPIO9

A_VREF

UART_DTR

USART0_TXD

USART0_RXD

ZDM-A1281-A2 Pinout

SPI_CLK

SPI_MOSI

SPI_MISO

GPIO0

GPIO1

GPIO2

OSC32K_OUT

RESET

DGND

CPU_CLK

118

234567891011121314151617

43

BAT

AGND

GPIO9

JTAG_TDI

JTAG_TCK

JTAG_TDO

JTAG_TMS

ADC_INPUT_2

ADC_INPUT_3

A_VREF

ADC_INPUT_1

UART_DTR

USART0_TXD

USART0_RXD

USART0_EXTCLK

GPIO8

IRQ_6

IRQ_7

© 2007 MeshNetics Page 8 of 22

ZigBit™ OEM Modules Product Datasheet

Pin Assignment Table

Defaul
Conn
ector

Pin Name Description I/O

Pin

1 SPI_CLK Reserved for stack operation O PB1 3

t State

after

power

on

Port

ATmega

1281V

ATmega
1281v
Datasheet
Reference*

Notes,
see list
below

2 SPI_MOSI Reserved for stack operation O PB3 3
3 SPI_MISO Reserved for stack operation I/O PB2

4 GPIO0

5 GPIO1

6 GPIO2
7 OSC32K_OUT 32.768 kHz clock output. O PG3 Page 99 3, 4

8 RESET Reset input (active low). I RESET Page 56 3

9,

DGND Digital ground

22,

23

10 CPU_CLK

11 I2C_CLK I2C serial clock output O tri-state PD0 1, 2, 3, 6
12 I2C_DATA I2C serial data input/output I/O tri-state PD1

General purpose digital input/output
0

General purpose digital input/output
1

General purpose digital input/output
2

RF clock output. When module is in
active state, 4 MHz signal is present
on this line. While module is in the
sleeping state, clock generation is
stopped also.

I/O tri-state PB5

I/O tri-state PB6

I/O tri-state PB7

O XTAL_In

Page 189

Pages 78­79, 86-87,
109

Pages 233­264,364

3
1, 2, 3, 6

1, 2, 3, 6

1, 2, 3, 6

3

1, 2, 3, 6
13 UART_TXD UART receive pin I tri-state PD2 1, 2, 3, 6
14 UART_RXD UART transmit pin O tri-state PD3

RTS input (Request To Send) for

15 UART_RTS

16 UART_CTS

17 GPIO6

18 GPIO7

19 GPIO3

20 GPIO4

21 GPIO5

24,

D_VCC Digital supply voltage (Vcc)

25
26 JTAG_TMS JTAG test mode select I PF5

UART hardware flow control. Active
low.

CTS output (Clear To Send) for
UART hardware flow control. Active
low.

General purpose digital input/output
6

General purpose digital input/output
7

General purpose digital input/output
3

General purpose digital input/output
4

General purpose digital input/output
5

I tri-state PD4

O tri-state PD5

I/O tri-state PD6

I/O tri-state PD7

I/O tri-state PG0

I/O tri-state PG1

I/O tri-state PG2

Page 198

Pages 78­79, 91, 110

Pages 79,
99, 111

Pages 7,

1, 2, 3, 6

1, 2, 3, 6

1, 2, 3,

6, 7

1, 2, 3, 6

1, 2, 3, 6

1, 2, 3, 6

1, 2, 3, 6

1, 2, 3, 6

8

1, 2, 3, 5

© 2007 MeshNetics Page 9 of 22

ZigBit™ OEM Modules Product Datasheet

Defaul
Conn
ector

Pin Name Description I/O

Pin

27 JTAG_TDI JTAG test data input I PF7 1, 2, 3, 5
28 JTAG_TDO JTAG test data output O PF6 1, 2, 3, 5
29 JTAG_TCK JTAG test clock I PF4
30 ADC_INPUT_3 ADC input channel 3 I tri-state PF3 1, 2, 6
31 ADC_INPUT_2 ADC input channel 2 I tri-state PF2 1, 2, 6
32 ADC_INPUT_1 ADC input channel 1 I tri-state PF1 1, 2, 6

ADC input channel 0. Used by the

33 BAT

34 A_VREF
35 AGND Analog ground
36 GPIO9

stack for battery level
measurement. Nominal voltage is 1
V in respect to AGND.

Output/Input reference voltage for
ADC

General purpose digital input/output
9

t State

after

power

on

I tri-state PF0

I/O tri-state AREF

I/O PG5

Port

ATmega

1281V

ATmega
1281v
Datasheet
Reference*

97, 288

Pages 97,
266-287

Pages 274,
280

Notes,
see list
below

1, 2, 3, 5

1, 2, 6

1, 2, 3, 6

37 UART_DTR
38 USART0_RXD UART/SPI receive pin I tri-state PE0 1, 2, 3, 6

39 USART0_TXD UART/SPI transmit pin O tri-state PE1 1, 2, 3, 6

USART0_EXT

40

CLK
41 GPIO8
42 IRQ_7 Digital input interrupt request 7 I tri-state PE7 1, 2, 3, 6

43 IRQ_6 Digital input interrupt request 6 I tri-state PE6

44,
46,

RF_GND
48

45 RFP_IO Differential RF input/output. I/O 9
47 RFN_IO Differential RF input/output. I/O 9

Notes:

1. *Most of pins can be configured for general purpose I/O or for some alternative functions as described in
details in the ATmega1281V Datasheet [1].

2. GPIO pins can be programmed either for output, or input with/without pull-up resistors. Output pin drivers
are strong enough to drive LED displays directly (refer to figures on pages 387-388, [1]).

3. All digital pins are provided with protection diodes to D_VCC and DGND

4. It is strongly recommended to avoid assigning an alternative function for OSC32K_OUT pin because it is
used by eZeeNet Framework. However, this signal can be used if another peripheral or host processor
requires 32.768 kHz clock, otherwise this pin can be disconnected.

5. Normally, JTAG_TMS, JTAG_TDI, JTAG_TDO, JTAG_TCK pins are used for on-chip debugging and flash
burning. They can be used for A/D conversion if JTAGEN fuse is disabled.

6. eZeeNet software can configure as general-purpose I/O lines the following pins: GPIO0, GPIO1, GPIO2,
GPIO3, GPIO4, GPIO5, GPIO6, GPIO7, GPIO8, GPIO9, I2C_CLK, I2C_DATA, UART_TXD, UART_RXD,
UART_RTS, UART_CTS, ADC_INPUT_3, ADC_INPUT_2, ADC_INPUT_1, BAT, UART_DTR,
USART0_RXD, USART0_TXD, USART0_EXTCLK, IRQ_7, IRQ_6. Additionally, four JTAG lines could be

DTR input (Data Terminal Ready)
for UART. Active low.

UART/SPI external clock I tri-state PE2
General purpose digital input/output

8

RF analog ground

I tri-state PE4

I/O tri-state PE3

Pages 73,
93

Pages 198,
224, 198­232

Pages 73,
93-96

1, 2, 3, 6

1, 2, 3, 6

1, 2, 3, 6

1, 2, 3, 6
9

© 2007 MeshNetics Page 10 of 22

ZigBit™ OEM Modules Product Datasheet

programmed with software as GPIO as well, but this requires changing the fuse bits and will disable JTAG
debugging.

7. CTS pin can be configured by eZeeNet to indicate sleep/active condition of the module thus providing
mechanism for power management of host processor. If such functionality is needed, it is recommended to
connect external pull-down resistor to this pin to prevent undesirable transients during module reset
process.

8. It is recommended to use ferrite bead and 1 µF capacitor located closely to the power supply pin, as shown
below.

1,8...3,6 V

D_VCC

DGND

9. Pins 44 through 48 are not present on the module with chip antennas

Typical schematics

© 2007 MeshNetics Page 11 of 22

Mounting Information

ZigBit™ OEM Modules Product Datasheet

ZDM-A1281-B0 PCB Recommended Layout, Top View

19,7

1,0

118

1925

14,4

All dimensions are in millimeters

0,5

3,8

1925

14,4

1,0

4844

0,8

4326

1,2

ZDM-A1281-A2 PCB Recommended Layout, To p View

118

24,0

0,9

All dimensions are in millimeters

0,8

4326

1,2

The above diagrams show the recommended PCB layout for ZigBit module. No via-holes and no wires are allowed
on the PCB upper layer in the area occupied by the module. As a critical requirement, RF_GND pins should be
grounded via several holes located very close to pins thus minimizing inductance and preventing mismatch and
losses.

© 2007 MeshNetics Page 12 of 22

ZigBit™ OEM Modules Product Datasheet

Sample Antenna Reference Designs

The following reference antenna design shows an example that can serve as a basis for further optimization.
The symmetric dipole antenna shown below has been tuned for a particular case, so the cut-and-paste approach
would not necessarily ensure an optimum performance because of multiple factors affecting the antenna matching
and pattern (for instance, the board material and thickness, shields, the material of enclosure, the board
neighborhood, other components located next to antenna and so on). As a general recommendation, metal
enclosures or setting high profile components closely to antenna should be avoided. Using low profile enclosures
can, furthermore, cause antenna tuning. The holes shown located around the board eliminate the undesirable
antenna pattern distortions which might be induced by radiation from the board edges. The ZigBit module should not
be placed next to components causing undesirable interference in its operating frequency band or adjacent bands,
such as GSM, CDMA, WiFi, and Bluetooth.

PCB Layout: Symmetric Dipole Antenna to ZDM-A1281-B0

Top side

4,0

2,6

1,4

3

,

3

5

,

6

4,0

1,9

3,0

0

,

3

0,7

9,2

2,0

ZigBit

Module

Bottom side

54,0

9,2

1.8

1,2

2

,

1

23,0

26,0

1,2

3

,

3

8

.

1

2 through holes O3,0

Metallized through holes O0.3~0.4

Recommended step 1 mm

Components area

No metallization, wires,

through holes allowed

Metallization

2

ZigBit

Module

60,0

,

1

Material: FR-4. thick n ess 1.6 mm
Metallization: 35 um
Coating: HASL, solder mask

All dimensions are in millimeters

© 2007 MeshNetics Page 13 of 22

ZigBit™ OEM Modules Product Datasheet

ZDM-A1281-B0 Pattern: Symmetric Dipole Ant enna (horizontal plane)

© 2007 MeshNetics Page 14 of 22

ZigBit™ OEM Modules Product Datasheet

ZDM-A1281-B0 SWR

© 2007 MeshNetics Page 15 of 22

ZigBit™ OEM Modules Product Datasheet

ZDM-A1281-A2 Pattern (horizontal plane)

© 2007 MeshNetics Page 16 of 22

ZigBit™ OEM Modules Product Datasheet

ZDM-A1281-A2 Pattern (vertical plane)

© 2007 MeshNetics Page 17 of 22

ZigBit™ OEM Modules Product Datasheet

ZDM-A1281-A2 Gain

Normally chip antennas are more tolerant of board and enclosure materials, and ZigBit module neighborhood;
however, general recommendations for board design for the PCB antenna version still apply.

The board should be designed such that it prevents propagation of microwave field inside the board material itself.
High frequency electromagnetic field may penetrate the board and radiate from the edges of the board causing
undesirable pattern distortions. To eliminate this effect, it is often enough to surround the board with metallized
holes connected to module ground.

Since the module with chip antenna is tuned for installation on FR-4 board with thickness 1.6 mm, the performance
is guaranteed only if the board is designed according to the diagram below. Deviations from this design may change
the performance.

© 2007 MeshNetics Page 18 of 22

ZigBit™ OEM Modules Product Datasheet

Recommended Layout for Chip Antenna Module ZDM-A1281-A2

Top side

60,0

3,5

5

,
6

3,5

2 through holes O3,0

ZigBit

Module

Metallized through holes O0.3~0.4

Recommended step 1 mm

Bottom side

ZigBit

Module

Components area

No metallization, wires,

through holes allowed

Metallization

Material: FR-4. thickness 1.6 mm
Metallization: 35 um
Coating: HASL, solder mask

All dimensions are in millimeters

© 2007 MeshNetics Page 19 of 22

Balun HHM1711D1

ZigBit™ OEM Modules Product Datasheet

PCB Layout: 50 Ohm External Antenna to ZDM-A128 1-B0

Top side

Connector Murata

MM3325-2507

0,7

2,0

Bottom side

In case an external antenna or a 50 Ohm unbalanced antenna is required, they can be easily interfaced to ZigBit
module ZDM-A1281-B0 by using 2:1 balun as shown above. This sample demonstrates how to use low-profile
Murata connector. It can be simply replaced with 50 Ohm microstrip line as shown in TDK’s HHM1711D1 Balun
Datasheet [6].

Metallized through holes O0.3~0.4

Recommended step 1 mm

Components area

No metallization, wires,

through holes allowed

Metallization

Material: FR-4. thickness 1.6 m m
Metallization: 35 um
Coating: HASL, solder mask
Detailed dimensions: see datasheets for
MM3325, HHM1711D1

All dimensions are in millimeters

T echnical Support

Tel: [phone]
E-mail: [e-mail]

Development Support

• Easy-to-use Evaluation and Development Kits are available.

• Source code samples and RF reference designs are available to qualified customers.

• MeshNetics runs the ZigBit Priority Support Program to facilitate faster delivery of ZigBit-based applications

to the market. The qualified customers enjoy priority samples policy, direct access to MeshNetics RF
experts, 802.15.4 MAC-, eZeeNet stack- and Gateways- development teams, dedicated FAE for application
consulting and other technical resources to accelerate the development of ZigBit-based products and
applications. To qualify for the Program, please contact us at [e-mail]

© 2007 MeshNetics Page 20 of 22

for more details.

ZigBit™ OEM Modules Product Datasheet

Ordering Information

You can contact MeshNetics for additional modules, the Evaluation Kit or the Developer’s Kit to build your cust om
network. Please e-mail us at [e-mail]

Please specify the product part number and description when ordering.

Part Number Description

ZDM-A1281-B0 2.4 GHz IEEE802.15.4/ZigBee OEM Module w/ Balanced RF Port

ZDM-A1281-A2 2.4 GHz IEEE802.15.4/ZigBee OEM Module with chip antennas

, or visit us online at www.meshnetics.com/contacts.

Related Documents

[1] Atmel 8-bit AVR Microcontroller with 64K/128K/256K Bytes In-System Programmable Flash.

2549F-AVR-04/06

[2] Atmel Low-Power Transceiver for ZigBee Applications. AT86RF230 Target Specification.

5131A-ZIGB-08/15/05

[3] IEEE Std 802.15.4-2003 IEEE Standard for Information technology – Part 15.4 Wireless Medium Access

Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks
(LR-WPANs)

[4] ZigBee Specification. ZigBee Document 053474r06, Version 1.0
[5] eZeeNet™ IEEE802.15.4/ZigBee Software. Product Datasheet. MeshNetics Doc. M-251~02
[6] Multilayer Baluns, HHM Series. HHM1710D1 For Bluetooth & IEEE802.11b/g,

www.tdk.co.jp/tefe02/e8balun_hhm.pdf

Disclaimer

MeshNetics believes that all information is correct and accurate at the time of issue. MeshNetics reserves the right
to make changes to this product without prior notice. Please visit MeshNetics website for the latest available version.
MeshNetics does not assume any responsibility for the use of the described product or convey any license under its
patent rights.

T rademarks

MeshNetics®, ZigBit, eZeeNet, ZigBeeNet, SensiLink, LuxLabs, Luxoft Labs, and MeshNetics, Luxoft Labs and
ZigBit logos are trademarks of LuxLabs Ltd.

All other product names, trade names, trademarks, logos or service names are the property of their respective
owners.

© 2007 MeshNetics. All rights reserved.

No part of the contents of this manual may be transmitted or reproduced in any form or by any means without the
written permission of MeshNetics.

© 2007 MeshNetics Page 21 of 22

ZigBit™ OEM Modules Product Datasheet

Contact Information

MeshNetics

9 Dmitrovskoye Shosse
Moscow 127434, Russia
Tel: [phone]
Fax: [phone]
E-mail: [e-mail]
Website: www.meshnetics.com
Office hours: 8:00am – 5:00pm (Central European Time)

© 2007 MeshNetics Page 22 of 22