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PDF RF2917 Data sheet ( Hoja de datos )
| Número de pieza | RF2917 | |
| Descripción | 433/868/915MHZ FM/FSK RECEIVER | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
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11
Typical Applications
• Wireless Meter Reading
• Keyless Entry Systems
• 433/868/915MHz ISM Band Systems
RF2917
433/868/915 MHZ
FM/FSK RECEIVER
• Remote Data Transfers
• Wireless Security Systems
Product Description
The RF2917 is a monolithic integrated circuit intended for
use as a low cost FM or FSK receiver. The device is pro-
vided in 32-lead plastic packaging and is designed to pro-
vide a fully functional FM receiver. The chip is intended
for analog or digital applications in the North American
915MHz ISM band and European 433MHz and 868 MHz
ISM bands. The integrated VCO, ÷64 prescaler, and ref-
erence oscillator require only the addition of an external
crystal to provide a complete phase-locked oscillator for
single channel applications. The selection of linear FM
output or digital FSK output is done with the mute pin.
7.00
+ 0.20 sq.
0.22
+ 0.05
-A-
0.15
0.05
0.50
5.00
+ 0.10 sq.
7° MAX
0° MIN
1.40
+ 0.05
Dimensions in mm.
0.60
+ 0.15
0.10
0.127
Optimum Technology Matching® Applied
üSi 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
29
Phase
Detector &
Charge Pump
Prescaler
÷64
Linear
RSSI
9 10 11
12 13 16
17 18 23 24
30 OSC B
31 OSC E
21 RSSI
20 MUTE
22 FM OUT
Functional Block Diagram
Package Style: LQFP-32_5x5
Features
• Fully Monolithic Integrated Receiver
• 2.7V to 5.0V Supply Voltage
• Narrowband and Wideband FSK
• 300MHz to 1000MHz Frequency Range
• Power Down Capability
• Analog or Digital Output
11
Ordering Information
RF2917
433/868/915MHz FM/FSK Receiver
RF2917 PCBA-L Fully Assembled Evaluation Board, 433MHz
RF2917 PCBA-M Fully Assembled Evaluation Board, 868MHz
RF2917 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
Rev B2 010118
11-129
1 page  
RF2917
Pin
16
Function
IF2 IN
Description
Interface Schematic
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.
IF2 BP+
60 kΩ
330
IF2 BP-
60 kΩ
330
IF2 IN
17 IF2 BP+ DC feedback node for the 60dB limiting amplifier strip. A 100nF 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 to 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 select FM, FSK, or mute at the FM OUT pin.
MUTE>Vcc - 0.4V turns the FM OUT signal off. MUTE<0.4V turns the
FM OUT signal on for FSK digital data. When MUTE is left floating, the
FM OUT signal is linear FM.
VCC
MUTE
21
RSSI
A DC voltage proportional to the received signal strength is output from
this pin. The output voltage increases with increasing signal strength.
22 FM OUT Demodulated output from the discriminator/demodulator. Output levels
on this are CMOS compatible in FSK mode (see pin 20). In linear FM
mode, the demodulated signal level is approximately 240mVpp on a
DC voltage offset. The magnitude of the load impedance is intended to
be 1MΩ or greater.
23 IF2 OUT IF output from the 60dB limiting amplifier strip. This pin is intended to
be connected to pin 24 through a 5pF capacitor (for 10.7MHz IF appli-
cations). This capacitor in conjunction with a tank resonant at the IF fre-
quency connected from pin 24 to ground is used to form an FM
discriminator.
24 DEMOD IN This pin is the input to the FM demodulator. This pin is NOT AC cou-
pled. Therefore, a DC blocking capacitor is required on this pin to avoid
a DC path to ground. A DC blocked LC tank resonant at the IF or
ceramic discriminator should be connected to this pin.
VCC
RSSI
IF2 OUT
VCC
DEMOD IN
10 kΩ
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.
RESNTR-
11
26 RESNTR+ See pin 25.
See pin 25.
27
VCC2
This pin is used to 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 B2 010118
11-133
5 Page 
RF2917
Evaluation Board Schematic
H (915MHz), M (868MHz), L (433MHz) boards
(Download Bill of Materials from www.rfmd.com.)
VCC
R9
10 Ω
C27
10 nF
C28
47 pF
L7*
L6*
C30
3.3 nF
R11
2.7 kΩ
PD
VCC
J1
RF IN
VCC
VCC
J2
IF OUT
R1
10 Ω
C1
10 nF
50 Ω µstrip
R2
10 Ω
C6
10nF
C4*
L1*
C7
47 pF
R4
10 Ω
C11
10 nF
C12
47 pF
L4
6.8 µH
50 Ω µstrip
C14
68 pF
L5 RSW2**
10 µH
Drawing 2917400C, 401-,
402-
*See table for values.
**Components not normally populated.
***D1 : SMV1233-011
C29*
D1***
R10
3.9 kΩ
C31
47 nF
C2
47 pF
C3
4.7 µF
C5*
L2*
R13*
C8*
32
1 DC
BIAS
2
3
4
5
26 25
29
Phase
Detector &
Charge Pump
Prescaler
÷64
6 Linear
RSSI
7
C9
15 pF
C13
22 pF
8
9
10
C15
10 nF
R12
0Ω
F1
SFECV10.7MS3S-A-TC
fO=10.7 MHz
BW=180 kHz
11 12 13 14 15 16 17
C16 C17
10 nF 10 nF
C19
C18 10 nF
10 nF
F2
SFECV10.7MS3S-A-TC
fO=10.7 MHz
BW=180 kHz
18 23
C20
10 nF
28 27
30
X1*
C32*
C33*
31
C23 R7
21
10 pF
51 kΩ
20
19
C21
47 pF
22
24
U2 (10.7 MHz)
CDF107B-A0-001
C25
4 pF
R8
1.5 kΩ
C26
10 nF
R6
10 Ω
C22
10 nF
C24
100 pF
P1-1
P1-3
P1
1 PD
2 GND
3 VCC
VCC
Ctrim*
3-10 pF
RSSI
MUTE
VCC
J3
DATA OUT
P2-1
P2-3
P2
1 RSSI
2 GND
3 MUTE
Board
L (433MHz)
M (868MHz)
H (915MHz)
C4 (pF)
2
1.5
2
L1 (nH)
27
8.2
6.8
C5 (pF)
100
100
22
L2 (nH)
33
12
12
R13 (Ω)
510
-
-
C8 (pF)
9
1
1
L6 (nH)
18
6.8
6.8
L7 (nH) C29 (pF) X1 (MHz) C32 (pF) C33 (pF)
18
9 6.612813 100
100
6.8
3 13.41015 100
100
6.8 3 14.15099 47 47
11
Rev B2 010118
11-139
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet RF2917.PDF ] | |
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