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PDF RF2919 Data sheet ( Hoja de datos )
| Número de pieza | RF2919 | |
| Descripción | 433/868/915MHZ ASK/OOK RECEIVER | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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11
Typical Applications
• Wireless Meter Reading
• Keyless Entry Systems
• 433/868/915MHz ISM Bands Systems
RF2919
433/868/915MHZ ASK/OOK
RECEIVER
• Remote Data Transfers
• Wireless Security Systems
Product Description
The RF2919 is a monolithic integrated circuit intended for
use as a low cost ASK/OOK receiver. The device is pro-
vided in 32-lead plastic packaging and is designed to pro-
vide a fully functional AM receiver. The chip is intended
for applications in the North American 915MHz ISM band
and European 433MHz and 868MHz ISM bands. The
integrated VCO, +64 prescaler, and reference oscillator
require only the addition of an external crystal to provide
a complete phase-locked oscillator for single channel
applications. A data comparator is included to provide
logic level outputs.
Optimum Technology Matching® Applied
!Si BJT
GaAs HBT
GaAs MESFET
Si Bi-CMOS
SiGe HBT
Si CMOS
RX IN 2
32
DC
BIAS
25 26
LNA OUT 4
MIX IN 6
MIX OUT 8
9 10 11
12 13 16
29
Phase
Detector &
Charge Pump
Prescaler
÷64
Linear
RSSI
17 18
22 24
31 OSC E
30 OSC B
21 RSSI
20 MUTE
23 DATA OUT
14
Functional Block Diagram
.284 .006
.268 .002
.201
.193
.284
.268
.020
7°MAX
0°MIN
.011
.007
.201
.193
.057
.053
.030
.020
.005
Package Style: LQFP-32
Features
• Fully Monolithic Integrated Receiver
• 2.7V to 5.0V Supply Voltage
• Up to 256kbps Data Rates
• 300MHz to 1000MHz Frequency Range
• Power Down Capability
• Analog or Digital Output
Ordering Information
RF2919
433/868/915MHz ASK/OOK Receiver
RF2919 PCBA-L Fully Assembled Evaluation Board, 433MHz
RF2919 PCBA-M Fully Assembled Evaluation Board, 868MHz
RF2919 PCBA-H Fully Assembled Evaluation Board, 915MHz
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
11
Rev A12 001113
11-143
1 page  
RF2919
Pin
16
Function
IF2 IN
Description
Inverting input to the 60dB limiting amplifier strip. A 10 nF DC blocking
capacitor is required on this input. The IF2 IN input presents a nominal
330Ω input resistance and interfaces directly to 10.7MHz ceramic fil-
ters.
Interface Schematic
IF2 BP-
60 kΩ
IF2 BP+
60 kΩ
330 Ω
IF2 IN
17 IF2 BP+ DC feedback node for the 60dB limiting amplifier strip. A 10nF bypass See pin 16.
capacitor from this pin to ground is required.
18 IF2 BP- See pin 17.
See pin 16.
19
VCC3
This pin is used is supply DC bias to the 60dB IF limiting amplifier. An
IF bypass capacitor should be connected directly to this pin and
returned to ground. A 10 nF capacitor is recommended for 10.7MHz IF
applications.
20
MUTE
This pin is used to mute the data output (DATA OUT). MUTE>2.0V
75 kΩ
turns the DATA OUT signal on. MUTE<1.0V turns the DATA OUT signal
MUTE
off.
25 kΩ
21
RSSI
A DC voltage proportional to the received signal strength is output from
this pin. The output voltage increases with increasing signal strength.
VCC
22 DATA IN- The inverting input of the data comparator. The RSSI is fed to this pin
via a 50kΩ resistor. This input is available for a data filtering capacitor
that provides noise and 2x IF rejection. The value of the capacitor can
DATA IN-
be calculated by C= 1/(2πF*50kΩ) where F is the desired 3dB band-
width.
RSSI
50 kΩ
RSSI
DATA IN+
50 kΩ
23 DATA OUT The data comparator output which contains the modulating data recov-
ered from the RSSI signal. Hysteresis can be added to the comparator
by placing a very large (<1MΩ) resistor between pins 23 and 24.The
magnitude of the load impedance is intended to be 1MΩ or greater.
24 DATA IN+ The non-inverting input of the data comparator. The RSSI is fed to this See pin 22.
pin via a 50kΩ resistor. This input is available for a large filtering capac-
itor such that the modulation signal can be filtered out leaving a DC ref-
erence signal for the comparator.
25
RESNTR- This port is used to supply DC voltage to the VCO as well as to tune the
RESNTR+
center frequency of the VCO. Equal value inductors should be con-
nected to this pin and pin 26.
DATA OUT
RESNTR-
11
26 RESNTR+ See pin 25.
See pin 25.
27
VCC2
This pin is used is supply DC bias to the VCO, prescaler, and PLL. An
IF bypass capacitor should be connected directly to this pin and
returned to ground. A 10nF capacitor is recommended for 10.7MHz IF
applications.
28
GND4
GND4 is the ground shared on chip by the VCO, prescaler, and PLL
electronics.
Rev A12 001113
11-147
5 Page 
RF2919
Application Schematic
868 MHz
VCC
10 Ω
10 nF
47 pF
6.8 nH
6.8 nH
2.2
nF
2.7 kΩ
PD
VCC
3.0 pF
***
3.9 kΩ
22 nF
10 nF
10 Ω
47 pF
4.7 µF
J1
RF IN
VCC
VCC
50 Ω µstrip
10 Ω
10 nF
1.5 pF 100 pF
8.2 nH
47 pF
12 nH
** 1.0 pF
J2
IF OUT
10 Ω
6.8 µH
10 nF
47 pF
15 pF
50 Ω µstrip
120 pF
2.2 µH
1.8 kΩ
**
22 pF
0
Filter
32
1 DC
BIAS
2
3
4
5
6
7
8
9
10 11
26 25
29 28 27
Phase
Detector &
Charge Pump
Prescaler
Β64
Linear
RSSI
50 kΩ 50 kΩ
30
31
21
20
19
23
12 13 14 15 16 17 18
22 24
10 nF
10 nF 10 nF
10 nF 10 nF
10 nF 10 nF **
Filter
VCC
13.41015 MHz
100 pF
100 pF
10 pF
24 kΩ
RSSI
10 Ω
47 pF 10 nF
**
MUTE
VCC
ASK
OUT
** Components not normally populated.
*** SMV1233-011
11
Rev A12 001113
11-153
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet RF2919.PDF ] | |
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