Data Sheet(pdf)

Hartcran House, 231 Kenton Lane, Harrow, Middlesex, HA3 8RP, England
Tel: +44 (0) 20 8909 9595, Fax: +44 (0) 20 8909 2233, www.radiometrix.com
BiM3H
UHF FM 400mW transceiver
transceiver module
Issue 2, 27 July 2012
The BIM3H is a miniature PCB mounting
UHF radio data transceiver incorporating a
received signal strength indicator (RSSI). It
allows the simple implementation of data
links at speeds up to 10kbps and
distances up 5000 metres over open
ground.
Features
Figure 1: BiM3H-869.50-10
Designed to comply with harmonised radio standard EN 300 220-3
Designed to comply with harmonised EMC standard EN 301 489-3
Data rates up to 10kb/s
Usable range up to 5000m
Frequency 869.50MHz
Fully screened
Fast data settling time
Available for operation at 869.50MHz in the UK and Europe, the BiM3H combines full screening
with internal filtering to ensure EMC compliance by minimising spurious radiation and
susceptibility. The module suits one-to-one and multi-node wireless links in applications including
car and building security, EPOS and inventory tracking, remote industrial process monitoring and
computer networking. Because of the small size and low power requirements, the BIM3H is ideal
for use in portable, battery-powered applications such as hand-held terminals.
Technical Summary
Receiver
Single conversion FM superhet
SAW front end filter gives >50dB image rejection
5 volt operation
Current consumption 15mA
-108dBm sensitivity @ 1ppm BER
RSSI output with 50dB range
Extremely low LO leakage, -125dBm typical
Transmitter
Transmit power: 400mW (26dBm, +/- 1dB)
Operating frequency 869.50MHz
5 volt operation
Current consumption 310mA (typical)
Data rate: 10 kbps
Evaluation platforms: NBEK + BiM / SMX carrier
Radiometrix Ltd, BiM3H Data Sheet
page 1
Figure 2: BiM3H block diagram
Radiometrix Ltd, BiM3H Data Sheet
page 2
side view (with can)
side view (through can)
10 mm
top view (without can)
RF GND 1
Antenna 2
RF GND 3
4
5
No pin
6
7
8
9
18
17
16
15
14
13
12
11
10
GND
Vcc
RX ENABLE
TX ENABLE
23 mm
TXD
AF
RXD
RSSI
GND
30.48 mm
33 mm
pin pitch: 2.54 mm
recommended PCB hole size: 1.2 mm
pins 4, 5, 6, 7 & 8 are not fitted
module footprint size: 25 x 32 mm
Figure 3: BiM3H Footprint (Top) view
Pin description
RF IN / OUT (pin 2)
50 input from the antenna, DC isolated.
RF GND
(pin 1/3)
RF ground pin, internally connected to the module screen . This pin should be connected to the RF return
path (coax braid, main PCB ground plane etc.)
0V
(pin 9/18/10)
DC supply ground. Internally connected to pin 2 and module screen.
RSSI
(pin 11)
Received signal strength indicator with 50dB range. See page 4 for typical characteristics.
RXD
(pin 12)
Digital output from the internal data slicer. The data is a squared version of the signal on pin 13 (AF) and is
true data, i.e. as fed to the transmitter. Output is “open-collector” format with internal 10kΩ pull-up to Vcc (pin
17).
AF out (pin 13)
Buffered and filtered analogue output from the FM demodulator. Standing DC bias 2V approx. External load
should be >10kΩ // <100pF.
TXD
(pin 14)
Dc coupled modulation input (5v logic)
TX enable
(pin15)
Transmitter enable pin, <0.5v
RX enable
(pin16)
Receiver enable pin, <0.5v
Vcc
(pin 17)
DC supply. Max ripple content 0.1Vp-p.
NOTE:
TX AND RX ENABLE SHOULD NOT BE OPERATED AT THE SAME TIME AS THIS
COULD DAMAGE THE MODULE.
Radiometrix Ltd, BiM3H Data Sheet
page 3
Absolute maximum ratings
Exceeding the values given below may cause permanent damage to the module.
Operating temperature
Storage temperature
-20 C to +70 C
-40 C to +100 C
Vcc (pin 17)
-0.1V to +5.5V
RSSI, AF, RXD (pins 11,13,12) -0.1V to +3V
RF IN/OUT (pin 2)
50V DC, +10dBm RF
Receiver Performance specifications
(Vcc = 5.0V / temperature = 20 C unless stated)
pin
min.
typ.
max.
units
notes
DC supply
Supply voltage
Supply current
17
17
4.9
9
5.0
15
5.1
18
V
mA
1
RF/ IF
RF sensitivity for 10dB (S+N/N)
RF sensitivity for 1ppm BER
1,2
1,2
-
-113
-108
-
dBm
dBm
RSSI range
IF bandwidth
Image rejection
IF rejection (10.7MHz)
LO leakage, conducted
11
2
2
2
50
100
-
50
180
54
-125
-110
dB
kHz
dB
dB
dBm
Baseband
Baseband bandwidth @ -3dB
13
0.1
-
7.8
kHz
13
13
13
200
1.5
-
250
2
1
-
350
2.5
5
100
mVP-P
V
%
pF
-
0.5
2
1
10
ms
ms
3
-
100
0.5
1
µs
ms
3
70
20
50
5000
80
µs
%
4
5
AF level
DC offset on AF out
Distortion on recovered AF
Load capacitance, AFout/RXD
2
3
3
DYNAMIC TIMING
Power up with signal present
Power up to valid RSSI
Power up to stable data
Signal applied with supply on
RSSI response time (rise/fall)
Signal to stable data
Time between data transitions
Mark:space ratio
Notes:
1.
2.
3.
4.
5.
11
12
Current increases at higher RF input levels (>-20dBm and above).
For received signal with ±30kHz FM deviation.
Typical figures are for signal at centre frequency, max. figures are for ±50kHz offset.
For 50:50 mark to space ratio (i.e. squarewave).
Average over 30ms
Radiometrix Ltd, BiM3H Data Sheet
page 4
Transmitter Performance specifications
(Vcc = 5.0V / temperature = 20 C unless stated)
pin
min.
typ.
max.
units
notes
DC supply
Supply voltage
Supply current
17
17
4.9
5.0
310
5.1
V
mA
8
RF
RF power output
Spurious emissions,<1GHz
Spurious emissions,>1GHz
RF centre frequency
Initial frequency accuracy
Overal frequency accuracy
FM deviation (peak)
Antenna impedance
2
2
2
2
2
2
2
2
25
-15
-40
27
-54
-40
+15
+40
-
dBm
dBm
dBm
MHz
kHz
kHz
kHz
Ohms
1
2
2
3
-
+26
869.5
0
0
+/-27
50
Baseband
Baseband bandwidth @ -3dB
14
0.1
-
8
kHz
6
Maximum raw data rate
TXD input level (logic low)
TXD input level (logic high)
14
14
14
-
10
-
0
5
Kbps
V
V
6
7
7
-
53
55
ms
8
DYNAMIC TIMING
TX enable to full RF
4
5
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
Measured into 50 Ohm load
Meets EN requirements at all frequencies
There is a <10% duty cycle restriction on 869.50MHz in EU member states
Total over full supply and temperature range
With 0V – 5V modulation input
5V CMOS compatible
To achieve specified FM deviation
Supply to Vcc must be constant and should not be used for power up of tx (use EN)
Power up timing for BiM3H
Enable
Data
TX Enable to full
RF output
(55 ms min.)
Preamble / RX
data slicer
settling time
(10 - 30ms)
Data
Figure 4: Typical timing diagram
Radiometrix Ltd, BiM3H Data Sheet
page 5
Received Signal Strength Indicator (RSSI)
The module incorporates a wide range RSSI which measures the strength of an incoming signal
over a range of approximately 50dB. This allows assessment of link quality and available margin
and is useful when performing range tests.
The output on pin 11 of the module has a standing DC bias in the region of 0.5V with no signal,
rising to around 1V at maximum indication. The RSSI output source impedance is high (~100k )
and external loading should therefore be kept to a minimum.
To ensure a fast response the RSSI has limited internal decoupling of 1nF to ground. This may
result in a small amount of ripple on the DC output at pin 11 of the module. If this is a problem
further decoupling may be added, in the form of a capacitor from pin 11 to ground, at the expense
of response speed. For example, adding 10nF here will increase RSSI response time from 100µs
to around 1ms. The value of this capacitor may be increased without limit.
Typical RSSI characteristic is as shown below:
1100
1000
RSSI VOLTAGE
900
800
700
600
500
400
300
200
-130
-120
-110
-100
-90
-80
-70
-60
-50
RF input level (dBm)
Fig.5: Typical RSSI response curve
Module mounting considerations
Good RF layout practice should be observed – in particular, any ground return required by the
antenna or feed should be connected directly to the RF GND pin at the antenna end of the
module, and not to the OV pin which is intended as a DC ground only. All connecting tracks should
be kept as short as possible to avoid any problems with stray RF pickup.
If the connection between module and antenna does not form part of the antenna itself, it should
be made using 50 microstrip line or coax or a combination of both. It is desirable (but not
essential) to fill all unused PCB area around the module with ground plane.
The module may be potted if required in a viscous compound which cannot enter the screen can.
Warning: DO NOT wash the module. It is not hermetically sealed.
Ordering information
BiM3H-869.50-10
Radiometrix Ltd, BiM3H Data Sheet
page 6
Radiometrix Ltd, BiM3H Data Sheet
10
100
500
868.0
[mW]
600kHz
25mW
<1% or LBT
Duty Cycle
Non-specific SRD
No Spacing
RF POWER [ERP]
Channel Spacing
Applications
868.60
100kHz
868.70
10mW
<1%
25kHz or
WB
Alarm
500kHz
25mW
<0.1% or LBT
No Spacing
Non-specific SRD
<1%
25kHz
869.25
250kHz
500mW
869.65
869.70
50kHz
25mW
<10% or LBT <10%
869.30 869.40
50kHz 50kHz 100kHz
869.20
No Spacing
25kHz
25kHz
or Wide Band
300kHz
5mW
870.0
up to 100%
Non-specific
SRD
Alarm
Non-specific SRD
10mW 10mW 10mW
<0.1%
25kHz
Social Alarm
Alarm
CEPT/ERC Rec 70-03, 868 MHz Band Plan
[MHz]
APPENDIX
page 7
Radiometrix Ltd
Hartcran House
231 Kenton Lane
Harrow, Middlesex
HA3 8RP
ENGLAND
Tel: +44 (0) 20 8909 9595
Fax: +44 (0) 20 8909 2233
[email protected]
www.radiometrix.com
Copyright notice
This product data sheet is the original work and copyrighted property of Radiometrix Ltd. Reproduction in
whole or in part must give clear acknowledgement to the copyright owner.
Limitation of liability
The information furnished by Radiometrix Ltd is believed to be accurate and reliable. Radiometrix Ltd
reserves the right to make changes or improvements in the design, specification or manufacture of its
subassembly products without notice. Radiometrix Ltd does not assume any liability arising from the
application or use of any product or circuit described herein, nor for any infringements of patents or other
rights of third parties which may result from the use of its products. This data sheet neither states nor
implies warranty of any kind, including fitness for any particular application. These radio devices may be
subject to radio interference and may not function as intended if interference is present. We do NOT
recommend their use for life critical applications.
The Intrastat commodity code for all our modules is: 8542 6000
R&TTE Directive
After 7 April 2001 the manufacturer can only place finished product on the market under the provisions of
the R&TTE Directive. Equipment within the scope of the R&TTE Directive may demonstrate compliance to
the essential requirements specified in Article 3 of the Directive, as appropriate to the particular
equipment.
Further details are available on The Office of Communications (Ofcom) web site:
http://www.ofcom.org.uk/
Information Requests
Ofcom
Riverside House
2a Southwark Bridge Road
London SE1 9HA
Tel: +44 (0)300 123 3333 or 020 7981 3040
Fax: +44 (0)20 7981 3333
[email protected]
European Communications Office (ECO)
Peblingehus
Nansensgade 19
DK 1366 Copenhagen
Tel. +45 33896300
Fax +45 33896330
[email protected]
www.ero.dk
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