RF2053
RF2053
HIGH PERFORMANCE FRACTIONAL-N
SYNTHESIZER WITH INTEGRATED RF MIXER
Package: QFN, 32-Pin, 5mmx5mm
Features
Mixer
Synth
LO
divider
Fractional-N Synthesizer
Very Fine Frequency Resolution
1.5Hz for 26MHz Reference
300MHz to 2400MHz External
VCO Frequency Range
On-Chip Crystal-Sustaining
Circuit With Programmable
Loading Capacitors
Integrated LO Buffer and LO
Divider
High-Linearity RF Mixer
Mixer Input IP3 +23dBm Typ.
Mixer Bias Adjustable for Low
Power Operation
Mixer Frequency Range 30MHz
to 2500MHz
2.7V to 3.6V Power Supply
Low Current Consumption
50mA to 70mA at 3V
3-Wire Serial Interface
Frac-N
sequence
generator
Charge
pump
Ref
divider
N
divider
Phase /
freq
detector
Functional Block Diagram
Product Description
The RF2053 is a low power, high performance, wideband RF frequency conversion
chip with integrated local oscillator (LO) generation and RF mixer. The RF synthe-
sizer includes an integrated fractional-N phase locked loop that can control an
external VCO to produce a low-phase noise LO signal with a very fine frequency res-
olution. The VCO output frequency can be divided by 1, 2, or 4 in the LO divider,
whose output is buffered and drives the built-in RF mixer which converts the signal
into the required frequency band. The mixer bias current can be programmed
dependent on the required performance and available supply current. The LO gen-
eration blocks have been designed to operate with external VCOs covering the fre-
quency range from 300MHz to 2400MHz. The RF mixer is very broad band and
operates from 30MHz to 2500MHz at the input and output, enabling both up and
down conversion. An external crystal of between 10MHz and 52MHz or an external
reference source of between 10MHz and 104MHz can be used with the RF2053 to
accommodate a variety of reference frequency options.
All on-chip registers are controlled through a simple three-wire serial interface. The
RF2053 is designed for 2.7V to 3.6V operation for compatibility with portable, bat-
tery powered devices. It is available in a plastic 32-pin, 5mmx5mm QFN package.
Applications
CATV Head-Ends
Digital TV Up/Down Converters
Digital TV Repeaters
Multi-Dwelling Units
Frequency Band Shifters
UHF/VHF Radios
Software Defined Radios
Satellite Communications
Super-Heterodyne Radios
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
RF MEMS
LDMOS
RF MICRO DEVICES®, RFMD®, Optimum Technology Matching®, Enabling Wireless Connectivity™, PowerStar®, POLARIS™ TOTAL RADIO™ and UltimateBlue™ are trademarks of RFMD, LLC. BLUETOOTH is a trade-
mark owned by Bluetooth SIG, Inc., U.S.A. and licensed for use by RFMD. All other trade names, trademarks and registered trademarks are the property of their respective owners. ©2006, RF Micro Devices, Inc.
DS140110
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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RF2053
Detailed Functional Block Diagram
ENBL
CONTROL
MODE
RESETB
ANA_VDD
DIG_VDD
RFIPN
RFIPP
1:1
IP
ANA_DEC
ANA_VDD
SDATA
SERIAL
SCLK
BUS
ENX
REXT
EXTERNAL VCO
VCOINP
Vtune
1:1
RFOPP
Serial Data Interface,
Control and Biasing
Analog
Regulator
Digital
Regulator
Mixer
LO Divider
/1, /2, or /4
OP
4:1
RFOPN
VCOINN
VCO Buffer
LO Buffer
Frac-N
Sequence
Generator
Synthesizer
LFILT1
Vref
N Divider
Charge
Pump
Phase /
Freq
Detector
-
+
EXTERNAL
OP-AMP
XTALIPP
Reference Oscillator
Circuitry and
Crystal Tuning
Reference Divider
/1 to /7
XTALIPN
Pin Out
RESETB
RFOPN
RFOPP
SDATA
32
ENBL
VCOINP
VCOINN
REXT
ANA_DEC
LFILT1
NC
NC
1
2
3
4
5
6
7
8
9
MODE
10
XTALIPP
11
XTALIPN
12
GND
13
NC
14
NC
15
NC
16
NC
EP
SCLK
31
ENX
30
NC
NC
29
28
27
26
25
24 RFIPP
23 RFIPN
22 ANA_VDD
21 NC
20 NC
19 DIG_VDD
18 NC
17 NC
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DS140110
RF2053
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
EP
Function
ENBL
VCOINP
VCOINN
REXT
ANA_DEC
LFILT1
NC
NC
MODE
XTALIPP
XTALIPN
GND
NC
NC
NC
NC
NC
NC
DIG_VDD
NC
NC
ANA_VDD
RFIPN
RFIPP
NC
NC
RFOPN
RFOPP
RESETB
ENX
SCLK
SDATA
Exposed pad
Description
Ensure that the ENBL high voltage level is not greater than V
DD
. An RC low-pass filter could be used to reduce
digital noise.
External VCO differential input. See note 1.
External VCO differential input. See note 1.
External bandgap bias resistor. Connect a 51k resistor from this pin to ground to set the bandgap reference
bias current. This could be a sensitive low frequency noise injection point.
Analog supply decoupling capacitor. Connect to analog supply and apply RF decoupling to a good quality ground
as close to the pin as possible.
Phase detector output. Low-frequency noise-sensitive node.
Mode select pin. Connect to DIG_VDD if mode switching is not required.
Reference crystal / reference oscillator input. Should be AC-coupled if an external reference is used. See note 3.
Reference crystal / reference oscillator input. Should be AC-coupled to ground if an external reference is used.
See note 3.
Connect to ground.
Digital supply. Should be decoupled as close to the pin as possible.
Analog supply. Should be decoupled as close to the pin as possible.
Differential input. See note 1.
Differential input. See note 1.
Differential output. See note 2.
Differential output. See note 2.
Chip reset (active low). Connect to DIG_VDD if external reset is not required.
Serial interface select (active low). An RC low-pass filter could be used to reduce digital noise.
Serial interface clock. An RC low-pass filter could be used to reduce digital noise.
Serial interface data. An RC low-pass filter could be used to reduce digital noise.
Connect to ground. This is the ground reference for the circuit. All decoupling should be connected here through
low impedance paths.
Note 1: The signal should be connected to this pin such that DC current cannot flow into or out of the chip, either by using AC
coupling capacitors or by use of a transformer (see evaluation board schematic).
Note 2: DC current needs to flow from ANA_VDD into this pin, either through an RF inductor, or transformer (see evaluation
board schematic).
Note 3: Alternatively an external reference can be AC-coupled to pin 11 XTALIPN, and pin 10 XTALIPP decoupled to ground. This
may make PCB routing simpler.
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7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
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RF2053
Absolute Maximum Ratings
Parameter
Supply Voltage (V
DD
)
Input Voltage (V
IN
), any Pin
RF/IF Mixer Input Power
Operating Temperature Range
Storage Temperature Range
Rating
-0.5 to +3.6
-0.3 to V
DD
+0.3
+15
-40 to +85
-65 to +150
Unit
V
V
dBm
°C
°C
Parameter
ESD Requirements
Human Body Model
General
RF Pins
Machine Model
General
RF Pins
Min.
Specification
Typ.
Max.
Unit
Condition
2000
1000
200
100
2.7
-40
-0.3
V
DD /
1.5
-10
-10
0
0.8*V
DD
10
20
3.0
3.6
+85
+0.5
V
DD
+10
+10
0.2*V
DD
V
DD
V
V
V
V
V
°C
V
DD
=Supply to DIG_VDD pin
V
V
uA
uA
V
V
k
pF
Input=0V
Input=V
DD
Operating Conditions
Supply Voltage (V
DD
)
Temperature (T
OP
)
Logic Inputs/Outputs
Input Low Voltage
Input High Voltage
Input Low Current
Input High Current
Output Low Voltage
Output High Voltage
Load Resistance
Load Capacitance
Static
Programmable Supply Current
(I
DD
)
Low Current Setting
High Linearity Setting
Standby
Power Down Current
50
70
3
140
-2
Low Current Setting
High Linearity Setting
9.5
12
mA
mA
mA
A
dB
dB
dB
Reference oscillator and bandgap only.
ENBL=0 and REF_STBY=0
Mixer output driving 4:1 balun.
Not including balun losses.
Mixer
Gain
Noise Figure
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DS140110
RF2053
Parameter
Mixer, cont.
IIP3
Low Current Setting
High Linearity Setting
Pin1dB
Low Current Setting
High Linearity Setting
RF and IF Port Frequency Range
Mixer Input Return Loss
30
10
+2
+12
2500
dBm
dBm
MHz
dB
100 differential
+12
+23
dBm
dBm
Min.
Specification
Typ.
Max.
Unit
Condition
Voltage Controlled Oscillator
Differential Input
External VCO Input Frequency
External VCO Input Level
300
-6
10
10
1
500
75
800
-3
2400
0
52
104
7
1500
2400
52
mV
P-P
MHz
MHz
26MHz phase detector frequency
-85
-91
-97
dBc/Hz
dBc/Hz
dBc/Hz
26MHz phase detector frequency
-90
-95
-102
120
+0.7
+1.1
240
+1.5
dBc/Hz
dBc/Hz
dBc/Hz
A
V
AC-coupled
At LO divider output
MHz
dBm
MHz
MHz
Reference Oscillator
Xtal Frequency
External Reference Frequency
Reference Divider Ratio
External Reference Input Level
Local Oscillator
Synthesizer Output Frequency
Phase Detector Frequency
Closed Loop Phase-Noise at 1kHz
Offset
2GHz LO Frequency
1GHz LO Frequency
500MHz LO Frequency
Closed Loop Phase-Noise at
10kHz Offset
2GHz LO Frequency
1GHz LO Frequency
500MHz LO Frequency
Charge Pump
Charge Pump Current
Charge Pump Output Voltage
DS140110
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or sales-support@rfmd.com.
5 of 36
