JUNE 1995
DS3506-7.3
DE6003
DIGITAL RADIO TRANSCEIVER
(Supersedes DS3506-6.3, September 1994)
The DE6003 is a high performance frequency hopping
microwave radio, designed for spread spectrum operation. It oper-
ates in the 2·4 to 2·5GHz band. Portions of this band are available
for data transmission on an unlicensed basis in most countries on a
shared basis with existing users (that include microwave ovens,
intruder alarms etc).
The radio is highly resistant to interference and has many other
design features that ensure the most reliable data
transfer possible (when used in conjunction with an advanced
protocol).
Co-location with other simultaneous users (as well as interfer-
ers) is possible, giving an unsurpassed data density in a given area.
The radio has been designed specifically for portable
computer applications (including use ‘on the move’). It is also suit-
able for a wide variety of other applications including
inventory control, point of sale terminals (including handheld) and
data logging.
FEATURES
s
Rapid Frequency Hopping with 1MHz
Channels 2·4 to 2·5GHz
s
Designed To Meet World Wide Standards
s
625 kb/s Data Rate
s
Highly Selective Receiver, Wide Dynamic Range
s
High Simultaneous User Density
s
Diversity for Mobile Applications
s
Fast Switching for Support of Advanced,
Interference Resistant Protocols
s
Miniature Size with Low Power Consumption for
Handheld Use
ORDERING INFORMATION
DE6003-001
Max. transmit power:
120dBm
DE6003-002
Max. transmit power:
122dBm
ANTENNAS
ANTSEL
V
CC
2
5
DE6003 digital radio transceiver
RELATED DOCUMENTS
GPS Outline drawing number: M50633-A2
FCC Rule 15.247
ETSI ETS 300-328
Japanese specification number RCR STD-33
ISO9000 Quality Manuals
GPS application notes AN142,143,144,145, 154 and 203
for further design information
RX/TX
V
CC
(
1
5V)
(
1
3V to
1
6V)
SWITCHING
REGULATOR
V
EE
(
2
5V)
SAW 1
350MHz
SAW 2
38MHz
90°
RXD
RSSI
LO2
PLL
7
S1
S2a
S2b
2·05-2·15
GHz
312MHz
CHANNEL
SELECT
LOADB
HOPPING
PLL
4
40/41
2
700MHz
S2c
4
2
4
5
140MHz
TX
PLL
TXD
POWER CONTROL
GND
Fig.1 DE6003 functional block diagram
DE6003
EXTERNAL INTERFACE
The DE6003 transceiver has a simple external interface, with
all but three interface connections having CMOS compatible
switching levels: some inputs have pull-down or pull-up resistors.
The DE6003 connection list, Table 2, is followed by a description
of each of the external connections in pin number order.
On power up, the DE6003 transceiver should have its control
inputs set to receive with the power amplifier off. On power
switch-on, a channel within the 101 channels is selected by the
value that is on the select data inputs SD(6:0); the correct channel
should be loaded by placing the channel number on the select
data inputs and strobing the channel data in with LOADB.
The antenna select input (ANTSEL) is used to switch
between the two antenna ports; this input should be set to
antenna 1 for transmit and only switched when the transceiver
is in receive mode for antenna diversity selection.
The data input (TXD) has data applied in simple non-return
to zero (NRZ) format with the maximum consecutive ‘1’s or ‘0’s
limited to 16. Receive data (RXD) is demodulated and output in
NRZ format with no clock extracted. The RXD output is
designed to drive a high impedance CMOS input with a
maximum load capacitance of 6pF. Loads in excess of 6pF will
extend the negative edge time of the output data resulting in
pulse stretching.
ELECTRICAL CHARACTERISTICS
The Electrical Characteristics are guaranteed over the following range of operating conditions, unless otherwise stated:
T
AMB
= 0°C to
155°C,
V
CC
= 5V±5%, V
CC25
=
13V
to
16V.
Value
Characteristic
All Inputs
Input voltage low
Input voltage high
PAOFF, PWRLO, ANTSEL
Input current low
Input current high
RX/TX
Input current low
Input current high
LOADB
Input current low
Input current high
STDBY
Input current low
Input current high
SD (6:0), TXD
Input current low
Input current high
SYNLOK
Output voltage low
Output voltage high
RXD
Output voltage low
Output voltage high
Rise/fall time
CLK
Output current low
Output current high
RSSI
Output voltage low
Output voltage high
ANT1, ANT2
Isolation between ports
Negative Supply, V
EE
Output current
Output voltage
Ripple and noise
I
EE
V
EE
Symbol
Min.
Max.
Units
Conditions/comments
V
IL
V
IH
I
IL
I
IH
I
IL
I
IH
I
IL
I
IH
I
IL
I
IH
I
IL
I
IH
V
OL
V
OH
V
OL
V
OH
0
3·5
1·5
V
CC
210
10
V
V
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
V
V
V
V
ns
mA
mA
V
V
dB
Note: Not CMOS compatible switching levels.
at 1mA sink
at 1mA source
V
CC
=15V at 100µA
V
CC
=15V at 100µA
Load = 6pF
Note: Not CMOS compatible switching levels.
For load impedance
<
300Ω
See AN142 for interface circuit
Note: Analog output, source impedance 10kΩ – not
CMOS compatible. See Fig 9.
V
IN
= 0V
V
IN
= V
CC
=5·25V
V
IN
= 0V
V
IN
= V
CC
=5·25V
V
IN
= 0V
V
IN
= V
CC
=5·25V
V
IN
= 0V
V
IN
= V
CC
=5·25V
2400
50
2250
2600
150
2400
10
210
200
210
200
0
V
CC
20·5
0
3·8
75
20·25
0·25
0
0·5
V
CC
1·2
V
CC
150
21·6
1·6
I
OL
I
OH
V
OL
V
OH
3·3
10
0
24·75
30
Nominal 50Ω load on each port
mA
215
V
25·25
Test at V
CC25
=
+5V
mVp-p at
215mA
50
2
Table 1
DE6003
EXTERNAL CONNECTIONS, 40-WAY CONNECTOR
Pin
1
2,4,6
3
5
Name
FRMGND
V
CC
PWRLO
ANTSEL
Description
Frame Ground. Connects to antistatic circuits on DE6003 and internally connected to ground.
15V
supply pins.
Power Level Control. Sets transmitter power to high (PWRLO = ‘1’) or low (PWRLO = ‘0’).
Diversity Control. This signal is used to select antenna port ANT1 (ANTSEL = ‘0’) or antenna port
ANT2 (ANTSEL = ‘1’). This can be used to make use of diversity to overcome signal nulling due to
destructive interference caused by multipath propagation.
Receive/Transmit control. Switches between Receive (RX/TX = ‘1’) and Transmit (RX/TX = ‘0’)
functions. CMOS compatible with 10kΩ nominal pull up resistor.
25V
output from internal switching regulator, powered by external
15V
supply, V
CC25
, pin 15.
Received Data output.This low drive current data output is the output from the receiver demodulator.
Total load on RXD should be less than 6pF.
25V
Ground.
Receive Data Ground. See note 1.
Transmitter Power Amplifier Control. PAOFF is used to turn the transmitter power amplifier on and
off, in conjunction with RX/TX.
Connected to ground and can be used to indicate that the DE6003 is connected. See note 2.
15V
Ground. Internally connected to all other grounds 1, 10, 11,19, 23 and 33.
Positive supply input for internal
25V
V
EE
generator.
Open circuit for normal mode, high for test mode. For factory use only.
Ground for
25V
regulator. Internally connected to all ground pins 1,10,11,14,16,18, 20, 23 and 33.
No Connection. These pins are not used, but no connection should be made to them as GPS re-
serves the right to use them for future expansion.
System Clock Ground. See note 1.
System Clock. This synthesiser clock output at 10MHz is also made available during standby as well
as being available during normal operation (it is not a recovered data clock). This output is a constant
current sink/source which must be terminated such as to keep its voltage swing low. See note 2.
Synthesiser Lock Monitor. Should only be used to indicate PLL failure. Lock (SYNLOK = ‘0’) is
defined as all three PLLs in lock. Unlock (SYNLOK = ‘1’) is defined as an Error Condition. Note that
when switching channels unlock may occur for short periods while locking on new channel.
Transmitter Data Input. CMOS compatible with no pull up/pull down resistor.
Standby . When low, disables radio function, placing all ICs into a low current mode; however, the
10MHz clock and the
25V
regulator continue to run in Standby mode, providing a clock
and
25V
output on the 40-way connector. CMOS compatible with 30kΩ nominal pull down resistor.
Receive Signal Strength Indicator. Received in-band signal level monitor. The analog RSSI output
increases monotonically from 0V to
13V
proportional to the logarithm of the input signal power.
Source impedance is 10kΩ .
Channel Select Code, SD6:0. These 7 data lines determine the channel used for both transmit and
receive.They are latched on the falling edge of LOADB and implemented on the rising edge of LOADB.
and are CMOS compatible with 30kΩ nominal pull down resistors. SeeTables 3 and 4.
7
8
9
10
11
12
13
14,16,18,20
15
17
19
21,22,24,
26,27
23
25
RX/TX
V
EE
RXD
V
EE
GND
RXDGND
PAOFF
INTERLOCK
GND
V
CC25
Test
GND25
NC
CLKSHLD
CLK
28
SYNLOK
29
30
TXD
STDBY
31
RSSI
32
34
35
37
39
36
38
33
40
SD0
SD1
SD2
SD3
SD4
SD5
SD6
RSSIGND
LOADB
Received Signal Strength Indicator Ground. Internally connected to all ground pins 1, 10,14,16,18,19,20
and 23.
Channel Select Load Pulse. This active low pulse loads SD (6:0) code into a data latch to set the
required channel. CMOS compatible with 30kΩ nominal pull up resistor. See Tables 3 and 4.
NOTES. 1. All ground pins (1, 10, 11, 14, 16, 18, 19, 20, 23 and 33) are internally connected. 2. See AN142, Designing with the DE6003, for
further information.
Table 2
3
DE6003
Channel
0
1
2
3
98
99
100
Channel select
code (SD0 = LSB)
0000000
0000001
0000010
0000011
1100010
1100011
1100100
Frequency (GHz)
2·400
2·401
2·402
2·403
2·498
2·499
2·500
Illegal Channel Allocation
In order to keep transmissions to within the 2·4 to 2·5GHz
frequency band, channels 101 and above will default to the
channels within this band as listed in Table 4.
Note that the channels used are dependent on the frequency
allocation in the country of use and the drive circuit/control logic
must limit the selected channels to within these frequency limits.
Antenna Ports
Two antenna ports are available (ANT1 and ANT2) for
receiver diversity and are selected by ANTSEL (pin 5 on the
40-way connector).These ports have 50V nominal impedance.
The port isolation is specified in Table 1.
Table 3 Channel allocation
TRANSCEIVER CHARACTERISTICS
General Electrical Performance
DC power supply requirements
The V
CC
(15V) power supply needs to be well regulated,
low noise (less than 20mVp-p ripple and noise) and have a
source impedance of less than 50mV at 1kHz. The V
CC
supply
has been separated from the input (V
CC25
) to the
25V
(V
EE
)
generator to provide greater flexibility in the overall system
design.
Extra care should be taken with ripple and noise
suppression of the V
CC
supply if the V
CC25
supply is connected
to the radio’s main V
CC
supply. If supplied separately, ripple and
noise on the V
CC25
supply should be less than 100mVp-p
at 1kHz.
NOTE: Ripple and noise on the
15V
power supply (V
CC
)
modulates the transmitter output and levels above those speci-
fied will result in increased spurious output from the DE6003,
and will also cause degradation in receiver sensitivity.
Illegal
channel
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
Illegal channel
select code
1100101
1100110
1100111
1101000
1101001
1101010
1101011
1101100
1101101
1101110
1101111
1110000
1110001
1110010
1110011
1110100
1110101
1110110
1110111
1111000
1111001
1111010
1111011
1111100
1111101
1111110
1111111
Default
frequency (GHz)
2·500
2·500
2·500
2·444
2·445
2·446
2·447
2·444
2·444
2·446
2·446
2·444
2·445
2·446
2·447
2·444
2·444
2·446
2·446
2·444
2·445
2·446
2·447
2·444
2·444
2·446
2·446
Default
channel
100
100
100
44
45
46
47
44
44
46
46
44
45
46
47
44
44
46
46
44
45
46
47
44
44
46
46
ABSOLUTE MAXIMUM RATINGS
Supply voltage, V
CC
0V to
16V
Supply voltage to V
EE
generator, V
CC25
0V to
16V
20·3
to V
CC
10·3
Input voltage
Operating temperature
0°C to
155°C
Storage temperature
220°C
to
170°C
Transmitter duty cycle
See Fig. 2
Maximum RF input
30dBm
Stresses above those listed may cause permanent damage
to the transceiver. These are stress ratings only and functional
operation of the transceiver at those conditions, or at any other
condition above those indicated in the operation section of this
data sheet is not implied. Exposure to Absolute Maximum
Rating conditions for extended periods may affect device
reliability.
NOTE: The V
CC25
supply must be applied not less than
10ms before the V
CC
supply. Failure to observe this require-
ment could result in premature failure of the transceiver.
V
CC
= 5·25V, 0°C to
1
55°C
Max.
30
18
15
30
150
400
Table 4
Parameter
V
CC25
supply current at 3V
V
CC25
supply current at 5V
V
CC25
supply current at 6V
V
CC
supply current standby
V
CC
supply current receive
V
CC
supply current transmit
V
CC
= 5V,
1
25°C
Min.
-
-
-
8
80
200
Typ.
-
-
-
14
120
330
Max.
-
-
-
20
140
384
Units
mA
mA
mA
mA
mA
mA
NOTES
1. Currents shown are for the transceiver only.
2. Peak input current requirements are>100mA as the 100µF capacitor has to be charged
3. V
EE
may be supplied from an external source, in which case V
CC25
should not be connected. See AN142
for further information.
Table 5 Supply currents
4
DE6003
Environmental Limiting Conditions of Use
q
q
q
q
q
Operational Temperature: 0°C to
155°C.
Storage Temperature
220°C
to
170°C.
Humidity: 95% non-condensing.
ESD: Human body model, 4000V.
Vibration Testing: 10 t0 2000Hz, displacement
61mm,
acceleration 2G.
running at lower temperatures. The thermal time constant of
the radio is 1 minute and this derating curve can only be applied
to transmitter for continuous transmit times of less than
20 seconds; above this time the duty cycle should be
considered 100%. For continuous operation the case
temperature should not exceed 40°C.
Operating temperature
When in operation the transmitter power amplifier (PA)
dissipates the highest amount of power and creates the highest
temperature. In order to keep the temperatures to a safe level
the environment in which the radio is operated must be kept
within the values specified in Environmental Limiting Conditions
of Use, above.
The radio dissipates this heat from the whole of its surface,
in particular from the metallic screen; steps must be taken to
prevent overheating as early failure of the radio may occur.
Depending on the air temperature surrounding the radio, the
PA duty cycle must be set to keep the dissipation to a safe value.
The transmitter power amplifier derating curve of Fig.2 shows
the derating factors that should be applied in order not to
exceed the maximum working temperature. Running at the
maximum permitted temperature on the PA will (as with all
semiconductor devices) result in shorter operational life than
AIR TEMPERATURE (°C)
60
55
50
40
30
SAFE WORKING AREA
20
10
0
0
20
40
60
80
93 100
PA DUTY FACTOR (%)
Fig. 2 PA duty cycle
TIMING SPECIFICATIONS AND CONDITIONS OF USE
The timing diagrams, Figs. 3 to 8, show some of the normal sequences used in the control of the DE6003 and are used to illustrate
timing relationships. Table 6 is the truth table for these signals values for which are given in Table 7. Each entry in Table 7 is described
on pages 9 and 10.
STDBY
L
H
H
H
H
H
H
H
RX/TX
X
H
H
H
H
L
L
L
PAOFF
X
L
L
L
L
L
H
H
PWRLO
X
L
L
H
H
L
L
H
ANTSEL
X
L
H
L
H
L
L
L
SD (6:0)
X
0000000
0001000
0010000
X
X
X
X
H
H
H
H
LOADB
X
Standby
Receive, ANT 1, low power, PA off,
setting Channel 0
Receive, ANT 2, low power, PA off,
setting Channel 8
Receive, ANT 1, high power, PA off,
setting Channel 16
Receive, ANT 2, high power, PA off
TX ready, ANT 1, low power, PA off
Transmit, ANT 1, low power, PA on
Transmit, ANT 1, high power, PA on
State
Table 6 Control signals truth table
5
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