Preliminary
RF2510
VHF/UHF TRANSMITTER
11
Typical Applications
• Local Oscillator Source
• FM/FSK Transmitter
• Wireless Data Transmitters
• 433/868/915MHz ISM Band Systems
• Low-Cost Single Frequency LO Source
• Wireless Security Systems
Product Description
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.
0.157
0.150
0.012
0.008
0.196
0.189
0.025
-A-
0.0098
0.0040
0.2440
0.2284
0.0688
0.0532
8° MAX
0°MIN
0.050
0.016
0.0098
0.0075
NOTES:
1. Shaded lead is Pin 1.
2. All dimensions are excluding mold flash.
3. Lead coplanarity - 0.005 with respect to datum "A".
Optimum Technology Matching® Applied
ü
Si BJT
Package Style: SSOP-16
GaAs HBT
SiGe HBT
GaAs MESFET
Si CMOS
Si Bi-CMOS
Features
• Fully Integrated PLL Circuit
• Integrated VCO and Reference Oscillator
11
TRANSCEIVERS
RESNTR+
RESNTR-
MOD IN
PD
• 2.4V to 5.0V Supply Voltage
• Low Current and Power Down Capability
• 300MHz to 1000MHz Frequency Range
• Narrowband and Wideband FM
1
2
OSC E
OSC B
13
11
12
7
DC Bias
VCO OUT
4
Prescaler
128/129 or
64/65
9
MOD CTRL
10
DIV CTRL
Phase
Detector &
Charge Pump
14
LOOP FLT
Ordering Information
RF2510
RF2510 PCBA-L
RF2510 PCBA-M
RF2510 PCBA-H
VHF/UHF Transmitter
Fully Assembled Evaluation Board 433MHz
Fully Assembled Evaluation Board 868MHz
Fully Assembled Evaluation Board 915MHz
Tel (336) 664 1233
Fax (336) 664 0454
http://www.rfmd.com
Functional Block Diagram
RF Micro Devices, Inc.
7625 Thorndike Road
Greensboro, NC 27409, USA
Rev A6 010207
11-1
RF2510
Absolute Maximum Ratings
Parameter
Supply Voltage
Power Down Voltage (V
PD
)
Operating Ambient Temperature
Storage Temperature
Preliminary
Rating
-0.5 to +5.5
-0.5 to V
CC
-40 to +85
-40 to +150
Unit
V
DC
V
°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
Frequency Range
Modulation
Modulation Frequency
Specification
Min.
Typ.
Max.
300 to 1000
FM/FSK
2
Unit
MHz
MHz
Condition
T=25 °C, V
CC
=3.6V, Freq=915MHz
Modulation frequency and deviation depen-
dent on VCO components L2, L3, C11, and
D1.
50Ω load, no output attenuator
To maintain PLL lock
Maximum FM Deviation
Output Power
Output Load VSWR
Add 1 dB pad
Add 2 dB pad
Add 3 dB pad
200
-2.5
2:1
3:1
6:1
20:1
64/65 or 128/129
70
25
-72
-98
-15
17
-62
50
-40
2.0
1.0
25k
2
4
100
+40
kHz
dBm
PLL and Prescaler
Prescaler Divide Ratio
VCO Gain, K
VCO
MHz/V
MHz/V
dBc/Hz
dBc/Hz
dBc
MHz
dBc
Ω
µA
V
V
Ω
ms
Dependent upon external components,
Freq=915MHz, 868Mhz
Freq=433MHz
10kHz Offset, 5kHz loop bandwidth
100kHz Offset, 5kHz loop bandwidth
Without filtering.
5kHz PLL loop bandwidth
PLL Phase Noise
Harmonics
Reference Frequency
Crystal Frequency Spurs
Max Crystal R
S
Charge Pump Current
11
TRANSCEIVERS
Power Down Control
Power Down “ON”
Power Down “OFF”
Control Input Impedance
Turn On Time
Voltage supplied to the input; device is “ON”
Voltage supplied to the input; device is “OFF”
Crystal start-up, 7.15MHz crystal. PLL lock
time additional 4/(loop bandwidth) sec.
Specifications
Operating limits over temp
T<+40°C
Sleep mode
Power Supply
Voltage
2.4
2.2
7
3.6
5
10.5
13.5
1
V
V
V
mA
µA
Current Consumption
11-2
Rev A6 010207
Preliminary
Pin
1
Function
OSC B
Description
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.
RF2510
Interface Schematic
V
CC2
OSC B
OSC E
2
3
4
OSC E
GND1
VCO OUT
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.
Ground connection for the VCO OUT buffer amp.
Buffered output of the VCO
See pin 1.
V
CC
20
VCO OUT
5
6
7
VCC
GND
PD
This pin is used to supply DC bias to the entire IC. ARF Bypass capac-
itor should be connected directly to ground.
Ground connection.
Power Down control for all circuitry. When this pin is a logic “low” all cir-
cuits are turned off.
50 kΩ
PLL ENABL
8
9
NC
MOD CTRL
Not internally connected.
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.
MOD CTL
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
DIV CTL
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.
RESNTR+
RESNTR-
4 kΩ
MOD IN
12
MOD IN
13
14
RESNTR+
LOOP FLT
FM analog or digital modulation can be imparted to the VCO through
See pin 11.
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.
See pin 11.
Output of the charge pump. An RC network from this pin to ground is
used to establish the PLL bandwidth.
V
CC
LOOP FLT
Rev A6 010207
11-3
TRANSCEIVERS
RF2510
Pin
15
Function
VREF P
Description
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.
Not internally connected.
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.
Preliminary
Interface Schematic
16
NC
ESD
V
CC
PIN
11
TRANSCEIVERS
11-4
Rev A6 010207
Preliminary
Pin Out
OSC B
OSC E
GND1
VCO OUT
VCC
GND
PD
NC
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
RF2510
11
TRANSCEIVERS
Rev A6 010207
11-5
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