11-1
11
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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 MESFET
GaAs HBT
Si Bi-CMOS
SiGe HBT
Si CMOS
11
13
12
Prescaler
128/129 or
64/65
Phase
Detector &
Charge Pump
1
2
10
9
DI
V
C
TRL
MOD
C
TRL
R
ESNTR+
MOD
I
N
OSC B
OSC
E
RESNTR-
4
VCO 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 Single 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 433MHz 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 Evaluation Board 433MHz
RF2510 PCBA-M Fully Assembled Evaluation Board 868MHz
RF2510 PCBA-H Fully Assembled Evaluation 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
0MIN
NOTES:
1. Shaded lead is Pin 1.
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
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Absolute Maximum Ratings
Parameter
Rating
Unit
Supply Voltage
-0.5 to +5.5
V
DC
Power Down Voltage (V
PD
)
-0.5 to V
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, V
CC
= 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
50
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 bandwidth
Max Crystal R
S
50
100
Charge Pump Current
-40
+40
A
Power Down Control
Power Down "ON"
2.0
V
Voltage supplied to the input; device is "ON"
Power Down "OFF"
1.0
V
Voltage supplied to the input; device is "OFF"
Control Input Impedance
25k
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 < +40C
Current Consumption
7
10.5
13.5
mA
1
A
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
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Pin
Function
Description
Interface Schematic
1
OSC B
This pin is connected directly to the reference oscillator transistor base.
The intended reference oscillator configuration is a modified Colpitts.
An appropriate capacitor as chosen by the customer should be con-
nected between pin 1 and pin 2.
2
OSC E
This pin is connected directly to the emitter of the reference oscillator
transistor. An appropriate capacitor as chosen by the customer should
be connected from this pin to ground.
See pin 1.
3
GND1
Ground connection for the VCO OUT buffer amp.
4
VCO OUT
Buffered output of the VCO
5
VCC
This pin is used to supply DC bias to the entire IC. ARF Bypass capac-
itor should be connected directly to ground.
6
GND
Ground connection.
7
PD
Power Down control for all circuitry. When this pin is a logic "low" all cir-
cuits are turned off.
8
NC
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 desired level, a voltage divider refer-
enced 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
PLL ENABL
MOD CTL
DIV CTL
RESNTR-
RESNTR+
4 k
MOD IN
LOOP FLT
V
CC
Preliminary
11-4
RF2510
Rev A6 010207
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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 connected directly to
this pin.
16
NC
Not internally connected.
ESD
This diode structure is used to provide electrostatic discharge protec-
tion to 3kV using the human body model. the following pins are pro-
tected: 1, 2, 3, 5, 6, 7, 9, 10, 14, and 15.
V
CC
PIN
Preliminary
11-5
RF2510
Rev A6 010207
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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
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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
5 pF
MOD IN
10 k
1.2k
10 nF
100 nF
33 nF
22 pF
.01 uF
VCC
10
22 pF
.01 uF
D1 : SMV1233-011
Loop BW = 5 kHz
VCO OUT
18
270
270
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
5 pF
AUDIO
10 k
1.2 k
10 nF
100 nF
33 nF
22 pF
.1 uF
VCC
10
22 pF
.1 uF
D1, D2 : SMV1233-011
18
270
270
47 k
22 pF
D2
Loop BW = 5 kHz
RF2510 Audio Transmitter
Preliminary
11-7
RF2510
Rev A6 010207
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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*
8 pF
C17*
C3
100 pF
R7
270
R6
270
R5
18
C4
8 pF
C5
15 pF
C19
8 pF
L4
22 nH
L1
22 nH
50
strip
J1
VCO OUT
R1
10
C7
.01 uF
C6
22 pF
VCC
C11
3 pF
D1
SMV1233
-011
VCC
C13
22 pF
C12
.01 uF
C15
4.7
F
R4
10
50
strip
J2
MOD IN
DIV CTRL
MOD CTRL
R2
3.9 k
C9
4.7 nF
C8
33 nF
C10
47 nF
R3
2 k
2510400, Rev B
R8*
C18
3-10 pF
L3
27 nH
L2
27 nH
PD
C14
4.7
F
+
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
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Evaluation Board Schematic
868 MHz
Evaluation Board Schematic
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*
8 pF
C17*
C3
100 pF
R7
270
R6
270
R5
18
C4
6 pF
C5
6 pF
L1
6.8 nH
50
strip
J1
VCO OUT
R1
10
C7
.01 uF
C6
22 pF
VCC
C11
5 pF
D1
SMV1233
-011
VCC
C13
22 pF
C12
.01 uF
C15
4.7
F
R4
10
50
strip
J2
MOD IN
DIV CTRL
MOD CTRL
R2
3.9 k
C9
10 nF
C8
33 nF
C10
100 nF
R3
0.750 k
2510401, Rev B
R8*
C18
3-10 pF
L2
4.7 nH
L3
4.7 nH
C14
4.7
F
+
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*
8 pF
C17*
C3
100 pF
R7
270
R6
270
R5
18
C4
6 pF
C5
6 pF
L1
6.8 nH
50
strip
J1
VCO OUT
R1
10
C7
0.1 uF
C6
22 pF
VCC
C11
5 pF
D1
SMV1233
-011
L2
4.7 nH
VCC
C13
22 pF
C12
0.1 uF
C15
4.7
F
R4
10
50
strip
J2
MOD IN
DIV CTRL
MOD CTRL
R2
3.9 k
C9
10 nF
C8
33 nF
C10
100 nF
R3
1.2 k
2510402, Rev B
R8*
C18
3-10 pF
L3
4.7 nH
C14
4.7
F
+
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
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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
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Peak-to-Peak Deviation for
MOD IN = 0 V to Signal Level, VCC = 3.0 V
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
Signal Level (V)
Freq.
Deviation
(
kHz
p
-p)
Freq. Dev. (KHzp-p)
Peak-to-Peak Deviation for
MOD IN = 0 V to Signal Level, VCC = 4.0 V
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
Signal Level (V)
Freq.
Deviation
(
kHz
p
-p)
Freq. Dev. (KHzp-p)
Peak-to-Peak Deviation for
MOD IN = 0 V to Signal Level, VCC = 5.0 V
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
Signal Level (V)
Freq.
Deviation
(
kHz
p
-p)
Freq. Dev. (KHzp-p)
Output Power and I
CC
versus 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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