|
|
PDF RF2054 Data sheet ( Hoja de datos )
| Número de pieza | RF2054 | |
| Descripción | LOW POWER PLL AND VCO | |
| Fabricantes | RF Micro Devices | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de RF2054 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
|
No Preview Available !
RF2054Low
Power PLL and
VCO with Inte-
grated Mixers
RF2054
LOW POWER PLL AND VCO WITH INTEGRATED
MIXERS
Package: QFN, 32-Pin, 5mm x 5mm
Features
Fractional-N Synthesizer
Very Fine Frequency Resolution
1.5Hz for 26MHz Reference
LO Frequency Range 940MHz to
1000MHz
Low Phase Noise VCO
Integrated LO Buffers
Two Wideband RF Mixers
Mixer Frequency Range 30MHz
to 2500MHz
Mixer Input IP3 +12dBm
Mixer Bias Adjustable for Low
Power Operation
2.1V to 2.3V Power Supply
Low Current Consumption
45mA typ. at 2.2V
3-Wire Serial Interface
Applications
Band Shifters
Super-Heterodyne Radios
Diversity Receivers
Wireless Telemetry
VCO
LO
divider
Synth
Frac-N
sequence
generator
Charge
pump
N
divider
Phase /
freq
detector
Sw
LO
divider
Ref
divider
Functional Block Diagram
Product Description
The RF2054 is a low power, high performance, frequency conversion chip with inte-
grated local oscillator (LO) and a pair of RF mixers. The synthesizer includes an inte-
grated fractional-N phase locked loop that can control the VCO to produce a low
phase noise and low spurious LO signal with very fine frequency resolution. The
VCO output can then be divided by one, two, or four in the LO divider, the output of
which drives the mixer, which converts the signal into the required frequency band.
The LO generation block has been optimized to operate with the VCO covering the
frequency range from 940MHz to 1000MHz, set by the value of the external induc-
tor used. The mixers are broadband and can operate from 30MHz to 2500MHz at
the input and output, enabling both up and down conversion. An external reference
source of between 10MHz and 26MHz can be used with the RF2054.
All on-chip registers are controlled through a simple three-wire serial interface. The
RF2054 has been characterized for 2.2V operation and low power consumption. It
is available in a plastic 32-pin, 5mm x 5mm QFN package.
DS120320
Optimum Technology Matching® Applied
GaAs HBT
GaAs MESFET
InGaP HBT
SiGe BiCMOS
Si BiCMOS
SiGe HBT
GaAs pHEMT
Si CMOS
Si BJT
GaN HEMT
BiFET HBT
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. ©2012, RF Micro Devices, Inc.
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
1 of 39
1 page  
RF2054
Pin Names and Descriptions
Pin Name Description
1
ENBL
Ensure that the ENBL high voltage level is not greater than VDD. An RC low-pass filter could be used to reduce
digital noise.
2
INDP
VCO 3 differential inductor. Connect to ground for DC bias.
3
INDN
VCO 3 differential inductor. Connect to ground for DC bias.
4
REXT
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.
5 ANA_DEC Analog supply decoupling capacitor. Connect to analog supply and decouple as close to the pin as possible.
6
LFILT1
Phase detector output. Low-frequency noise-sensitive node.
7
LFILT2
Loop filter op-amp output. Low-frequency noise-sensitive node.
8
LFILT3
VCO control input. Low-frequency noise-sensitive node.
9
MODE
Mode select pin. An RC low-pass filter can be used to reduce digital noise.
10 XTALIPP Reference oscillator input. Should be AC-coupled if an external reference is used. See note 3.
11 XTALIPN Reference oscillator input. Should be AC-coupled to ground if an external reference is used. See note 3.
12
GND
Connect to ground.
13
RFIP1P
Differential input 1. See note 1.
14
RFIP1N
Differential input 1. See note 1.
15 NC
16 NC
17 RFOP1N Differential output 1. See note 2.
18 RFOP1P Differential output 1. See note 2.
19 DIG_VDD Digital supply. Should be decoupled as close to the pin as possible.
20 NC
21 NC
22 ANA_VDD Analog supply. Should be decoupled as close to the pin as possible.
23
RFIP2N
Differential input 2. See note 1.
24
RFIP2P
Differential input 2. See note 1.
25 NC
26 NC
27 RFOP2N Differential output 2. See note 2.
28 RFOP2P Differential output 2. See note 2.
29
RESETB
Chip reset (active low). Connect to DIG_VDD if external reset is not required.
30
ENX
Serial interface select (active low). An RC low-pass filter could be used to reduce digital noise.
31
SCLK
Serial interface clock. An RC low-pass filter could be used to reduce digital noise.
32
SDATA
Serial interface data. An RC low-pass filter could be used to reduce digital noise.
EP Exposed pad 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.
DS120320
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
5 of 39
5 Page 
VCO External Inductor Selection
The RF2054 VCO resonator circuit can be simplified to the schematic shown below:
L3
3.3nH
Pin 2
INDP
L1
0.5nH
C1
2.5pF to 5.5pF
L4
L5
L2
0.5nH
3.3nH
Pin 3
INDN
RF2054
RF2054
VCO
CORE
C1
L1 and L2
L3 and L4
L5
Variable (coarse tune) capacitance plus varactor and stray capacitance.
Bondwire inductance of 0.5nH on each pin.
External inductors that form a differential inductor and provide a DC ground path to bias VCO.
Inductance of ground via (not part of differential inductor).
The following equation can be used to calculate the VCO frequency range:
Fo = --------1----------
2 LC
where C is the total differential capacitance C1, 2.5pF to 5.5pF, and L is the total differential inductance:
L = L3 + L4 + 1nH = 7.6nH
For L3 and L4 of 3.3nH, this equation gives total VCO frequency range of about 800MHz to 1150MHz.
Some margin must be left at the top and bottom of the VCO frequency range to allow for process, assembly and environmental
variations. A CT_CAL margin of 25 bits is recommended at both the top and bottom, about 0.6pF of capacitance.
The VCO resonator will have the highest Q and lowest phase noise at the lower end of the coarse tuning curve. For applications
where the LO frequency is fixed, or only tunes over a few MHz, it is recommended to design for CT_CAL of about 40 using C1 =
4.7pF.
DS120320
7628 Thorndike Road, Greensboro, NC 27409-9421 · For sales or technical
support, contact RFMD at (+1) 336-678-5570 or [email protected].
11 of 39
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet RF2054.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| RF2051 | HIGH PERFORMANCE WIDEBAND RF PLL/VCO | RF Micro Devices |
| RF2052 | HIGH PERFORMANCE WIDEBAND RF PLL/VCO |  RFMD |
| RF2053 | HIGH PERFORMANCE FRACTIONAL-N SYNTHESIZER | RFMD |
| RF2054 | LOW POWER PLL AND VCO | RF Micro Devices |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |