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Product Description
Ordering Information
Typical Applications
Features
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Optimum Technology Matching Applied
Si BJT
GaAs MESFET
GaAs HBT
Si Bi-CMOS
SiGe HBT
Si CMOS
IF
Filter
Antenna
RF2919
RSSI
64/65 or
128/129
F
RX
/n
Rolling
Code
Decoder
T1
S3
S2
S1
DK1000R
315MHZ REMOTE KEYLESS ENTRY RECEIVER
Remote Keyless Entry
Wireless Security Systems
Remote Monitoring
Remote Controls
The DK1000R is the receiver half of our remote keyless
entry system evaluation kit. It is designed to allow the
user to easily and quickly demonstrate the operation of
the RF2919 in a typical application. Everything needed to
demonstrate a one way receiver is included. The RF2919
is setup to demonstrate a typical keyless entry system
using a rolling code decoder while operating as an
FCC15.231 type device at 315 MHz. A battery is included
and the antenna is printed on the circuit board. This unit
is designed to work with the mating transmitter, DK1000T.
Complete Receiver
Programmable Rolling Code Decoder
LED and Buzzer Indicators
Mates with DK1000T Transmitter
Battery and Antenna
DK1000R
315MHz Remote Keyless Entry Receiver
DK1000R
Available only as part of the DK1000 Reference
Design Kit
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DK1000R
Rev A2 020109
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Absolute Maximum Ratings
Parameter
Ratings
Unit
Supply Voltage
3.3 to 9.0
V
DC
Input RF Level
+10
dBm
Output Load VSWR
50:1
Operating Ambient Temperature
-40 to +85
C
Storage Temperature
-40 to +150
C
Parameter
Specification
Unit
Condition
Min.
Typ.
Max.
Overall
T=25 C, V
CC
= 3.3V (regulated),
Freq= 315MHz
RF Frequency Range
315
MHz
Reference Frequency
4.748
MHz
RX Sensitivity
-100
-104
dBm
IF BW = 150kHz, Freq= 915MHz, S/N= 8dB
LO Leakage
-70
dBm
Power Supply
Voltage
3.3
9.0
V
9V to 3.3V regulated supply
Current Consumption
9.0
13.0
20.0
mA
Caution! ESD sensitive device.
RF Micro Devices believes the furnished information is correct and accurate
at the time of this printing. However, RF Micro Devices reserves the right to
make changes to its products without notice. RF Micro Devices does not
assume responsibility for the use of the described product(s).
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DK1000R Theory of Operation and Application Information
The 9V battery is installed in the back of the receiver
by sliding open the battery door located below the
moveable stand. The battery is clipped into the con-
nector provided, placed in the compartment, and the
battery door replaced. The receiver is activated by
moving the small lever switch to the "ON" position. The
power switch may be accessed through an opening in
the clear cover on the front of the receiver with a small
tool. When the receiver is turned on the LED marked
"POWER" will be illuminated. Turning the receiver off
when not in use will extend battery life.
OPERATION
The receiver is operated by first turning on the power
as described previously. The LEDs may be observed to
be illuminated corresponding to the button that is being
depressed on the transmitter. The LED on the receiver
will be illuminated indicating that the power is on. The
"LEARN" LED will flash while the receiver is decoding
a transmitted signal. The buzzer will be activated indi-
cating
that
the
corresponding
button
is
being
depressed on the transmitter. The stand on the back of
the receiver may be extended by lifting up on the upper
portion of the stand (marked "1" on the case) and pull-
ing out the bottom portion of the stand. The receiver
may then be placed for easy viewing while operating
the transmitter.
The receiver has one lever switch for turning the power
on and off and one pushbutton used in learning the
transmitter. There are five LEDs on the receiver PCB.
One of the LEDs indicates that the receiver is activated
(power on). Another LED is used during the process of
learning the transmitter and flashes during normal
operation while receiving a signal. The three LEDs
marked "S1", "S2", and "S3" are illuminated as corre-
sponding buttons are depressed on the transmitter.
The buzzer is activated by pressing the fourth button
on the transmitter. The remaining LED, marked
"VLOW" is illuminated to indicate a low battery condi-
tion. This indicates the need to replace the battery. An
antenna is printed onto the PCB for convenience.
The receiver uses the HCS512 decoder from Micro-
chip. Four pads are included for programming this
device. It is preprogrammed to operate in the desired
manner for this application. Additional information
about this device may be obtained from the manufac-
turer.
The 315 MHz receiver uses a 4.748 MHz crystal which
may be identified by the label on the top of the crystal
can. The following pages show the schematic for the
315 MHz receiver, the bill of material for the 315 MHz
receiver, the printed circuit board layout for the 315
MHz receiver. These materials, along with the Gerber
files for the PCBs may be found on the Internet at
www.rfmd.com.
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Evaluation Board Schematic
315MHz
(Download Bill of Materials from www.rfmd.com.)
DATA
CLK
2919403 Rev. B
U2
16
15
14
13
12
11
10
9
8
18
17
3
4
5
6
7
1
2
RF IN
NC
OSC
IN
VDD
DATA
CLK
SLEEP
OSC
OUT
V
LOW
LRN IN
LRN OUT
MCLR
GND
S0
S1
S2
NC
S3
3
4
1
2
7
8
5
6
22
21
24
23
18
17
20
19
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
VCC
VCC
C4
1 uF
C25
1 nF
R14
51 k
C2
10 nF
C3
10 nF
F1
SFECA10.7MS3-A-TC
C1
10 nF
U1
C7
10 nF
C6
10 nF
C5
10 nF
F2
SFECA10.7MS3-A-TC
f
0
= 10.7 MHz
BW = 180 kHz
C17
22 pF
R3
510
C18
15 pF
L3
6.8 uH
VCC
C15
9.0 pF
L4
39 nH
C14
220 pF
C8
10 nF
VCC
50
strip
C13
100 pF
E1
Antenna
VCC
CLK
VCC
DATA
MCLR
S5
LEARN BUTTON
R13
100 k
CLK
R6
10 k
VCC
R10
1 k
LEARN
LED
R7
1 k
R12
1 k
R8
1 k
S3
LED
S2
LED
S1
LED
R11
1 k
VLOW
LED
C19
10 pF
R5
10 k
VCC
1
2
BUZZER
T1
POS
NEG
C11
100 pF
C12
100 pF
Y1
4.748 MHz
C22
220 pF
C9
2.2 nF
R1
5.6 k
VCC
R2
3.9 k
C10
9.0 pF
D1
SMV1233-011
L1
39 nH
L2
39 nH
C20
10 nF
C21
220 pF
L6
1 uH
VCC
R15
1 k
POWER
LED
C23
1 uF
IN
OUT
VCC
2
1
3
U3
LM3480
C24
1 uF
S4
Switch
MCLR
R4
10 k
VCC
P1*
1
2
3
4
CON4
P2
CON2
1
2
GND
30 V
DC MAX
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Evaluation Board Layout
Board Size 2.287" x 2.361"
Board Thickness 0.062", Board Material FR-4
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DK1000R
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