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DK1000R
16
Typical Applications
* Remote Keyless Entry * Wireless Security Systems * Remote Monitoring * Remote Controls
315MHZ REMOTE KEYLESS ENTRY RECEIVER
Product Description
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 315MHz. A battery is included and the antenna is printed on the circuit board. This unit is designed to work with the mating transmitter, DK1000T.
Optimum Technology Matching(R) Applied
u
Si BJT Si Bi-CMOS
GaAs HBT SiGe HBT
GaAs MESFET Si CMOS
Features
* Complete Receiver * Programmable Rolling Code Decoder * LED and Buzzer Indicators * Mates with DK1000T Transmitter * Battery and Antenna
Antenna
IF Filter
RSSI
Rolling Code Decoder
T1 S1 S2 S3
/64/65 or /128/129
RF2919
FRX /n
Ordering Information
DK1000R DK1000R 315MHz Remote Keyless Entry Receiver Available only as part of the DK1000 Reference Design Kit Tel (336) 664 1233 Fax (336) 664 0454 http://www.rfmd.com
16
REF. DESIGNS & DESIGN KITS
Functional Block Diagram
RF Micro Devices, Inc. 7625 Thorndike Road Greensboro, NC 27409, USA
Rev A2 020109
16-11
DK1000R
Absolute Maximum Ratings Parameter
Supply Voltage Input RF Level Output Load VSWR Operating Ambient Temperature Storage Temperature
Ratings
3.3 to 9.0 +10 50:1 -40 to +85 -40 to +150
Unit
VDC dBm C C 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).
Parameter
Overall
RF Frequency Range Reference Frequency RX Sensitivity LO Leakage
Specification Min. Typ. Max.
315 4.748 -104 -70 3.3 9.0 9.0 20.0
Unit
Condition
T=25 C, VCC =3.3V (regulated), Freq=315MHz
-100
MHz MHz dBm dBm V mA
IF BW =150kHz, Freq=915MHz, S/N=8dB
Power Supply
Voltage Current Consumption 9V to 3.3V regulated supply 13.0
16
REF. DESIGNS & DESIGN KITS
16-12
Rev A2 020109
DK1000R
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 connector 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 indicating 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 pulling 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 corresponding 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 condition. This indicates the need to replace the battery. An antenna is printed onto the PCB for convenience. The receiver uses the HCS512 decoder from Microchip. 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 manufacturer. 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.
16
REF. DESIGNS & DESIGN KITS
Rev A2 020109
16-13
DK1000R
Evaluation Board Schematic 315MHz
(Download Bill of Materials from www.rfmd.com.)
VCC
C20 10 nF
L6 1 uH
C21 220 pF C22 220 pF Y1 4.748 MHz C12 100 pF C11 100 pF VCC VCC E1 Antenna C13 100 pF 1 50 strip 2 3 VCC C8 10 nF C14 220 pF L4 39 nH 4 5 6 C15 9.0 pF 7 8 L3 6.8 uH VCC R3 510 C17 22 pF C5 10 nF C6 10 nF C7 10 nF C1 10 nF P2 CON2 C18 15 pF 9 10 11 12 13 14 15 16
2919403 Rev. B
R2 3.9 k
VCC DATA P1* 1 2 3 4 CON4 S5 LEARN BUTTON CLK R6 10 k C4 1 uF LEARN C25 1 nF LED R14 51 k MCLR 20 5 19 18 17 C3 10 nF VCC 6 C2 10 nF R8 1 k R12 1 k R7 1 k 7 8 9 S0 S1 S2 S3 DATA CLK SLEEP VLOW 13 12 11 10 DATA CLK GND VDD 14 VCC 2 R10 1 k 3 4 LRN OUT NC MCLR NC OSCIN OSCOUT 17 16 15 C19 10 pF R5 10 k VCC R13 100 k 1 U2 LRN IN RF IN 18
C9 2.2 nF L1 39 nH R1 5.6 k
C10 9.0 pF
L2 39 nH D1 SMV1233-011
R4 10 k MCLR
CLK
VCC 31 30 29 28 27 26 25 U1 24 23 22 21 VCC
32
GND 1
30 V DC MAX 2 S4 Switch C24 1 uF U3 LM3480
1 2 2 1
R11 1 k
F2
SFECA10.7MS3-A-TC f0 = 10.7 MHz BW = 180 kHz
T1
POS
3
IN OUT
NEG
S1 LED
S2 LED
S3 LED
VLOW LED
F1
SFECA10.7MS3-A-TC
BUZZER VCC
C23 1 uF POWER LED R15 1 k
16
REF. DESIGNS & DESIGN KITS
16-14
Rev A2 020109
DK1000R
Evaluation Board Layout Board Size 2.287" x 2.361"
Board Thickness 0.062", Board Material FR-4
16
REF. DESIGNS & DESIGN KITS
Rev A2 020109
16-15
DK1000R
16
REF. DESIGNS & DESIGN KITS
16-16
Rev A2 020109

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