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11-1
11
TRANSCEIVERS
Preliminary
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 MESFETGaAs HBT
Si Bi-CMOS
SiGe HBT
Si CMOS
1113 12
Prescaler
128/129 or
64/65
Phase
Detector &
Charge Pump
1
2109
DIV CTRL
MOD CTRL RESNTR+
MOD IN
OSC B
OSC E
RESNTR-
4VCO OUT
14
LOOP FLT
7
PD
DC Bias
RF2510
VHF/UHF TRANSMITTER
• Local Oscillator Source
• FM/FSK Transmitter
• Wireless Data Transmitters
• 433/868/915MHz ISM Band Systems
• Low-Cost S ingle Frequency LO Source
• Wireless Security Systems
The RF2510 is a monolithic integrated circuit intended for
use as a low-cost Frequency Synthesizer. The device is
provided in a 16 pin SSOP package and is designed to
provide a phased locked frequency source for use in local
oscillator or transmitter applications. The chip can be
used in FM or FSK applications in the U.S. 915MHz ISM
band and European 433M Hz and 868MHz ISM band.
The integrated VCO, dual modulus/dual divide (128/129
or 64/65) pre-scaler, and reference oscillator require only
the addition of an external crystal to provide a complete
phase-locked oscillator.
• Fully Integrated PLL Circuit
• Integrated VCO and Reference Oscillator
• 2.4V to 5.0V Supply Voltage
• Low Current and Power Down Capability
• 300MHz to 1000MHz Frequency Range
• Narrowband and Wideband FM
RF2510 VHF/UHF Transmitter
RF2510 PCBA-L Fully Assembled EvaluationBoard 433MHz
RF2510 PCBA-M Fully Assembled Evaluation Board868MHz
RF2510 PCBA-H Fully AssembledEvaluation Board 915MHz
11
Rev A6 010207
0.157
0.150
0.025
0.012
0.008
0.196
0.189
0.2440
0.2284
0.0688
0.0532
0.050
0.016
0.0098
0.0075
8° MAX
0°MIN
NOTES:
1. Shaded leadis Pin1.
2. All dimensions are excluding mold flash.
3. Lead coplanarity - 0.005 with respect to datum "A".
-A-
0.0098
0.0040
Package Style: SSOP-16
Preliminary
11-2
RF2510
Rev A6 010207
11
TRANSCEIVERS
Absolute Maximum Ratings
Parameter Rating Unit
Supply Voltage -0.5 to +5.5 V
DC
Power Down Voltage (VPD) -0.5toV
CC
V
Operating Ambient Temperature -40 to +85 °C
Storage Temperature -40 to +150 °C
Parameter
Specification
Unit Condition
Min. Typ. Max.
Overall
T=25°C, VCC=3.6V, Freq=915MHz
Frequency Range 300 to 1000 MHz
Modulation FM/FSK
Modulation Frequency 2 MHz Modulation frequency and deviation depen-
dent on VCO components L2, L3, C11, and
D1.
Maximum FM Deviation 200 kHz
Output Power -2.5 dBm 50Ω load, no output attenuator
Output Load VSWR 2:1 To maintain PLL lock
Add 1 dB pad 3:1
Add 2 dB pad 6:1
Add 3 dB pad 20:1
PLL and Prescaler
Prescaler Divide Ratio 64/65 or 128/129
VCO Gain, K
VCO
70 MHz/V
Dependent upon external components,
Freq=915MHz, 868Mhz
25 MHz/V Freq=433MHz
PLL Phase Noise -72 dBc/Hz 10kHz Offset, 5kHz loop bandwidth
-98 dBc/Hz 100kHz Offset, 5kHz loop bandwidth
Harmonics -15 dBc Without filtering.
Reference Frequency 17 MHz
Crystal Frequency Spurs -62 dBc 5kHz PLL loop bandwi dth
Max Crystal R
S
50 100 Ω
Charge Pump Current -40 +40 µA
Power Down Control
Power Down “ON” 2.0 V Voltage supplied to the input; device is “ON”
Power Down “OFF” 1.0 V Voltagesupplied to the input; device is “OFF”
Control Input Impe dance 25k Ω
Turn On Time 2 4 ms Crystal start-up, 7.15MHz crystal. PLL lock
time additional 4/(loop bandwidth) sec.
Power Supply
Voltage 3.6 V Specifications
2.4 5 V Operating limits over temp
2.2 V T <+40°C
Current Consumption 7 10.5 13.5 mA
1 µA Sleep mode
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).
Preliminary
11-3
RF2510
Rev A6 010207
11
TRANSCEIVERS
Pin Function Description Interface Schematic
1OSCB
This pin is connected directly to the reference oscillator transistor base.
The intended re ference oscillat o r configuration is a modified Colpitts.
An appropriate capacitor as chosen by the customer should be connected between pin 1 and pin 2.
2OSCE
This pin is connected directly to the emitter of the reference os cillator
transistor. An appropriate capacitor as chosen by the customer should
be connected from this pin to ground.
See pin 1.
3GND1
Ground connection for the VCO OUT buffer amp.
4VCOOUT
BufferedoutputoftheVCO
5VCC
This pin is used to supply DC bias to the entire IC. ARF Bypass capacitor should be connected directly to ground.
6GND
Ground connection.
7PD
Power Down control for all circuitry. When this pin is a logic “low” all circuits are turned off.
8NC
Not internally connected.
9 MOD CTRL
This pin is used to select the prescaler modulus. A logic “high” selects
64 or 128 for the prescaler divisor. A logic “low” selects 65 or 129 for
the prescaler divisor.
10 DIV CTRL
This pin is used to select the desired prescaler divisor. A logic “high”
selects the 64/65 divisor. A logic low selects the 128/129 divisor.
11 RESNTR-
The RESNTR pins are used to supply DC voltage to the VCO, as well
as to tune the center frequency of the VCO. Equal value inductors
should be connected to this pin and pin 13.
12 MOD IN
FM analog or digital modulation can be imparted to the VCO through
this pin. The VCO varies in accordance to the voltage level presented
to this pin. To set the deviation to a desi red level, a voltage divider referenced to Vcc is recommended. Because the modulation varactors are
part of the resonator tank, the deviation is slightly dependent upon the
components used in the external tank.
See pin 11.
13 RESNTR+
See pin 11. See pin 11.
14 LOOP FLT
Output of the charge pump. An RC network from this pin to ground is
used to establish the PLL bandwidth.
OSC E
OSC B
V
CC2
VCO OUT
20
V
CC
50 k
Ω
PLL ENABL
MOD CTL
DIV CTL
RESNTR-RESNTR+
4k
Ω
MOD IN
LOOP FLT
V
CC
Preliminary
11-4
RF2510
Rev A6 010207
11
TRANSCEIVERS
Pin Function Description Interface Schematic
15 VREF P
Bias voltage reference pin for bypassing the prescaler and phase
detector. The bypass capacitor should be of appropriate size to provide
filtering of the reference crystal frequency and be con nected directly to
this pin.
16 NC
Not internally connected.
ESD
This diode structure is used to provide electrostatic discharge protection to 3kV using the human body model. the following pins are protected:1,2,3,5,6,7,9,10,14,and15.
V
CC
PIN
Preliminary
11-5
RF2510
Rev A6 010207
11
TRANSCEIVERS
Pin Out
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OSC B
OSC E
GND1
VCO OUT
VCC
GND
PD
NC
NC
VREF P
LOOP FLT
RESNTR+
MOD IN
RESNTR-
DIV CTRL
MOD CTRL
Preliminary
11-6
RF2510
Rev A6 010207
11
TRANSCEIVERS
Application Schematic (915MHz)
Application Schematic (915MHz)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
VREF P
LOOP FLT
RESNTR+
MOD IN
RESNTR-
DIV CTRL
MOD CTRL
OSC B
OSC E
GND1
VCO OUT
VCC
GND
PD
NC
100 pF
100 pF
X1
7.15909
MHz
V
CC
PD
MOD CTRL
DIV CTRL
4.7 nH
4.7 nH
D1
5pF
MOD IN
10 k
Ω
1.2k
Ω
10 nF
100 nF33 nF
22 pF .01 uF
VCC
10
Ω
22 pF .01 uF
D1 : SMV1233-011
Loop BW=5kHz
VCO OUT
18
Ω
270Ω270
Ω
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
NC
VREF P
LOOP FLT
RESNTR+
MOD IN
RESNTR-
DIV CTRL
MOD CTRL
OSC B
OSC E
GND1
VCO OUT
VCC
GND
PD
NC
100 pF
100 pF
X1
7.15909 MHz
V
CC
VCO OUT
PD
MOD
CTRL
DIV
CTRL
4.7 nH
4.7 nH
D1
5pF
AUDIO
10 k
Ω
1.2 k
Ω
10 nF
100 nF33 nF
22 pF .1 uF
VCC
10
Ω
22 pF .1 uF
D1, D2 : SMV1233-011
18
Ω
270Ω270
Ω
47 k
Ω
22 pF
D2
Loop BW=5kHz
RF2510 Audio Transmitter
Preliminary
11-7
RF2510
Rev A6 010207
11
TRANSCEIVERS
Evaluation Board Schematic
433 MHz
(Download Bill of Materials from www.rfmd.com.)
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Phase
Detector &
Charge Pump
Prescaler
128/129 or
64/65
DC Bias
C1
100 pF
C2
100 pF
X1
6.78 MHz
C16*
8pF
C17*
C3
100 pF
R7
270 Ω
R6
270 Ω
R5
18 Ω
C4
8pF
C5
15 pF
C19
8pF
L4
22 nHL122 nH
50 Ω µstrip
J1
VCO OUT
R1
10 Ω
C7
.01 uFC622 pF
VCC
C11
3pF
D1
SMV1233
-011
VCC
C13
22 pF
C12
.01 uF
C15
4.7 µF
R4
10 Ω
50 Ω µstrip
J2
MOD IN
DIV CTRL
MOD CTRL
R2
3.9 kΩ
C9
4.7 nF
C8
33 nF
C10
47 nF
R3
2kΩ
2510400, Rev B
R8*
C18
3-10 pF
L3
27 nH
L2
27 nH
PD
C14
4.7 µF
+
P1
1
2
3
CON3
P1-3 VCC
GND
P1-1 PD
P2
1
2
3
CON3
P2-1 DIV CTRL
GND
P2-3 MOD CTRL
Preliminary
11-8
RF2510
Rev A6 010207
11
TRANSCEIVERS
Evaluation Board Schema t ic
868 MHz
Evaluation Board Schema t ic
915 MHz
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Phase
Detector &
Charge Pump
Prescaler
128/129 or
64/65
DC Bias
C1
100 pF
C2
100 pF
X1
13.577344 MHz
C16*
8pF
C17*
C3
100 pF
R7
270 Ω
R6
270 Ω
R5
18 Ω
C4
6pF
C5
6pF
L1
6.8 nH
50 Ω µstrip
J1
VCO OUT
R1
10 Ω
C7
.01 uFC622 pF
VCC
C11
5pF
D1
SMV1233
-011
VCC
C13
22 pF
C12
.01 uF
C15
4.7 µF
R4
10 Ω
50 Ω µstrip
J2
MOD IN
DIV CTRL
MOD CTRL
R2
3.9 kΩ
C9
10 nF
C8
33 nF
C10
100 nF
R3
0.750 kΩ
2510401, Rev B
R8*
C18
3-10 pF
L2
4.7 nH
L3
4.7 nH
C14
4.7 µF
+
P1
1
2
3
CON3
P1-3 VCC
GND
P1-1 PD
P2
1
2
3
CON3
P2-1 DIV CTRL
GND
P2-3 MOD CTRL
PD
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Phase
Detector &
Charge Pump
Prescaler
128/129 or
64/65
DC Bias
C1
100 pF
C2
100 pF
X1
7.15909 MHz
C16*
8pF
C17*
C3
100 pF
R7
270 Ω
R6
270 Ω
R5
18 Ω
C4
6pF
C5
6pF
L1
6.8 nH
50 Ω µstrip
J1
VCO OUT
R1
10 Ω
C7
0.1 uFC622 pF
VCC
C11
5pF
D1
SMV1233
-011
L2
4.7 nH
VCC
C13
22 pF
C12
0.1 uF
C15
4.7 µF
R4
10 Ω
50 Ω µstrip
J2
MOD IN
DIV CTRL
MOD CTRL
R2
3.9 kΩ
C9
10 nF
C8
33 nF
C10
100 nF
R3
1.2 kΩ
2510402, Rev B
R8*
C18
3-10 pF
L3
4.7 nH
C14
4.7 µF
+
PD
P1
1
2
3
CON3
P1-3 VCC
GND
P1-1 PD
P2
1
2
3
CON3
P2-1 DIV CTRL
GND
P2-3 MOD CTRL
Preliminary
11-9
RF2510
Rev A6 010207
11
TRANSCEIVERS
Evaluation Board Layout 433MHz
Board Size 1.500” x 1.000”
Board Thickness 0.031”, Board Material FR4
Evaluation Board Layout 868MHz
Board Size 1.500” x 1.000”
Evaluation Board Layout 915MHz
Board Size 1.500” x 1.000”
Preliminary
11-10
RF2510
Rev A6 010207
11
TRANSCEIVERS
Peak-to-Peak Deviation for
MODIN=0VtoSignalLevel,VCC=3.0V
0.0
50.0
100.0
150.0
200.0
250.0
300.0
350.0
400.0
450.0
500.0
0.0 0.5 1.0 1.5 2.0 2.5 3.0
SignalLevel (V)
Freq. Deviation (kHz p-p)
Freq. Dev. (KHzp-p)
Peak-to-Peak Deviation for
MODIN=0VtoSignalLevel,VCC=4.0V
0.0
100.0
200.0
300.0
400.0
500.0
600.0
0.0 1.0 2.0 3.0 4.0 5.0
SignalLevel (V)
Freq. Deviation (kHz p-p)
Freq. Dev. (KHzp-p)
Peak-to-Peak Deviation for
MODIN=0VtoSignalLevel,VCC=5.0V
0.0
100.0
200.0
300.0
400.0
500.0
600.0
700.0
0.0 1.0 2.0 3.0 4.0 5.0
SignalLevel (V)
Freq. Deviation (kHz p-p)
Freq. Dev. (KHzp-p)
Output Power and ICCversus Voltage,
Freq = 915 MHz, with 3dB Attenuator
-80.0
-70.0
-60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2 3.4 3.6
Supply Voltage (Volts)
P
OUT
(dBm)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
I
CC
(mA)
-40C Pout
+25C Pout
+85C Pout
-40C Icc
+25C Icc
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