SKY72301-22 Skyworks Solutions Inc, SKY72301-22 Datasheet

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SKY72301-22

Manufacturer Part Number
SKY72301-22
Description
IC SYNTHESIZER 1GHZ 28-EPTSSOP
Manufacturer
Skyworks Solutions Inc
Type
Fractional N Synthesizerr
Datasheet

Specifications of SKY72301-22

Pll
Yes
Input
Clock, Crystal
Output
Clock, Crystal
Number Of Circuits
1
Ratio - Input:output
2:2
Differential - Input:output
Yes/Yes
Frequency - Max
1GHz
Divider/multiplier
Yes/No
Voltage - Supply
2.7 V ~ 3.3 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
Frequency-max
1GHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
863-1078-2

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
SKY72301-22
Manufacturer:
NXP
Quantity:
32 000
Part Number:
SKY72301-22
Manufacturer:
SKYWOPKS
Quantity:
20 000
DATA SHEET
SKY72301-22: Spur-Free, 1.0 GHz Dual Fractional-N
Frequency Synthesizer
Applications
Features
General purpose RF systems
Low bit rate wireless telemetry
Instrumentation
Specialized Mobile Radios (SMRs) and Private Mobile Radios
(PMRs)
Spur-free operation
1.0 GHz maximum operating frequency
500 MHz maximum auxiliary synthesizer
Ultra-small step size, 100 Hz or less
High internal reference frequency enables large loop bandwidth
implementations
Very fast switching speed (e.g., below 100 s)
Phase noise to –96 dBc/Hz inside the loop filter bandwidth
@ 950 MHz
Software programmable power-down modes
High-speed serial interface up to 100 Mbps
Three-wire programming
Programmable division ratios on reference frequency
Phase detectors with programmable gain provide a
programmable loop bandwidth
Frequency power steering further enhances rapid acquistion
time
On-chip crystal oscillator
Frequency adjust for temperature compensation
Direct digital modulation
3 V operation
Skyworks offers lead (Pb)-free, RoHS (Restriction of
Hazardous Substances) compliant packaging.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
200706C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 11, 2009
Description
Skyworks SKY72301-22 direct digital modulation fractional-N
frequency synthesizer provides ultra-fine frequency resolution,
fast switching speed, and low phase-noise performance. This
synthesizer is a key building block for high-performance radio
system designs that require low power and fine step size.
The ultra-fine step size of less than 100 Hz allows this synthesizer
to be used in very narrowband wireless applications. With proper
temperature sensing or through control channels, the
synthesizer’s fine step size can compensate for crystal oscillator
or Intermediate Frequency (IF) filter drift. As a result, crystal
oscillators or crystals can replace temperature- compensated or
ovenized crystal oscillators, reducing parts count and associated
component cost. The device’s fine step size can also be used for
Doppler shift corrections.
The SKY72301-22 has a phase noise floor of –95 dBc/Hz up to
1.0 GHz operation as measured inside the loop bandwidth. This is
permitted by the on-chip low noise dividers and low divide ratios
provided by the device’s high fractionality.
Reference crystals or oscillators up to 50 MHz can be used with
the SKY72301-22. The crystal frequency is divided down by
independent programmable divider ratios of 1 to 32 for the main
and auxiliary synthesizers. The phase detectors can operate at a
maximum speed of 25 MHz, which allows better phase noise due
to the lower division value. With a high reference frequency, the
loop bandwidths can also be increased. Larger loop bandwidths
improve the settling times and reduce in-band phase noise.
Therefore, typical switching times of less than 100 s can be
achieved. The lower in-band phase noise also permits the use of
lower cost Voltage Controlled Oscillators (VCOs) in customer
applications.
The SKY72301-22 has a frequency power steering circuit that
helps the loop filter steer the VCO when the frequency is too fast
or too slow, further enhancing acquisition time.
5 V output to loop filter
EP-TSSOP (28-pin, 9.7 x 6.4 x 1.1 mm) package (MSL3, 260 C
per JEDEC J-STD-020)
1

Related parts for SKY72301-22

SKY72301-22 Summary of contents

Page 1

... The device’s fine step size can also be used for Doppler shift corrections. The SKY72301-22 has a phase noise floor of –95 dBc/ 1.0 GHz operation as measured inside the loop bandwidth. This is permitted by the on-chip low noise dividers and low divide ratios provided by the device’ ...

Page 2

... In-Phase and Quadrature (I/Q) Digital-To-Analog Converters (DACs), quadrature upconverters, and IF filters from the transmitter portion of the radio system. Figure 1 shows a functional block diagram for the SKY72301-22. The device package and pinout for the 28-pin Exposed Pad Thin Shrink Small Outline Package (EP-TSSOP) are shown in Figure 2. ...

Page 3

... The serial interface is a versatile three-wire interface consisting of three pins: Clock (serial clock), Data (serial input), and CS (chip select). It enables the SKY72301-22 to operate in a system where one or multiple masters and slaves are present. To perform a loopback test at start-up and to check the integrity of the board and processor, the serial data is fed back to the master device (e ...

Page 4

... DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER Serial Interface Operation The serial interface consists of three signals: Clock (pin 1), Data (pin 27) and CS (pin 28). The Clock signal controls data on the two serial data lines (Data and CS). The Data pin bits shift into a temporary register on the rising edge of Clock. The CS line allows individual selection transfers that synchronize and sample the information of slave devices on the same bus ...

Page 5

... NOTE Direct Digital Modulation The high fractionality and small step size of the SKY72301-22 allow the VCO to be tuned to practically any frequency in the VCO’s operating range. This allows direct digital modulation by programming the different desired frequencies at precise instants. Typically, the channel frequency is programmed by the ...

Page 6

... DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER Case 1: To achieve a desired F of the synthesizer in 18-bit mode. Since the maximum internal reference frequency (F frequency is divided obtain fractional = 902.4530 = 45.12265 The value to be programmed in the Main Divider Register is Round[N reg = Round[45.12265] – – (decimal) ...

Page 7

... Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200706C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 11, 2009 DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER – N – 32)] ...

Page 8

... DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER Case 1: To achieve a desired F divide ratio is 32, the reference frequency (F frequency divide ratio of 2 provides a reference frequency of 8 MHz. Therefore integer = = The value to be programmed in the Auxiliary Divider Register is reg integer = 50 – (decimal) = 000010010 (binary) Summary: · ...

Page 9

... Dual Synthesizers/PLLs (document number 101349). Register Descriptions Table 1 lists the 10 16-bit registes that are used to program the SKY72301-22. All register writes are programmed address first, followed directly with data. MSBs are entered first. On power-up, all registers are reset to 0x000 except registers at address 0x0 and 0x3, which are set to 0x006 ...

Page 10

... DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER General Synthesizer Registers The dual-programmable reference frequency dividers provide the reference frequencies to the phase detectors by dividing the crystal oscillator frequency. The lower five bits hold the reference frequency divide index for the main phase detector. The next five bits hold the reference frequency divide index for the auxiliary phase detector ...

Page 11

... Bit 8 Bit — — — — — — DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER 1 0 LSB Auxiliary Synthesizer Divider Index C1420 1 0 LSB Auxiliary Synthesizer Dividend C1421 Bit 1 Bit 0 (LSB — — — — — ...

Page 12

... Full Power-Down = One-bit flag to power down the SKY72301- 22 except for the reference oscillator and the serial interface. When this bit is cleared, the SKY72301-22 is powered up. When this bit is set, the SKY72301- full power-down mode excluding the Mux_out signal. Main Synthesizer Power-Down = One-bit flag to power down the main synthesizer ...

Page 13

... See Table 4 for more information. Mux_out Pin Tri-State Enable = One-bit flag to tri-state the Mux_out pin. When this bit is cleared, the Mux_out pin is enabled. When this bit is set, the Mux_out pin is tri-stated. DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER 1 0 Full Power Down ...

Page 14

... Otherwise, problems related to moisture absorption may occur when the part is subjected to high temperature during solder assembly. The SKY72301-22 is rated to Moisture Sensitivity Level 3 (MSL3) at 260 C. It can be used for lead or lead-free soldering ...

Page 15

... SKY72301-22 are provided in Table 6. The recommended operating conditions are specified in Table 7 and electrical specifications are provided in Table 8. Figure 16 provides a schematic diagram for the SKY72301-22. Figure 17 shows the package dimensions for the 28-pin EP-TSSOP and Figure 18 provides the tape and reel dimensions. ...

Page 16

... DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER Table 5. SKY72301-22 Signal Descriptions ( Pin # Pin Name Type 17 GNDxtal Power and ground 18 LD/PSaux Analog output 19 VCCcp_aux (Note 1) Power and ground 20 CPout_aux Analog output 21 GNDcp_aux (Note 1) Power and ground 22 Fvco_aux Input 23 Fvco_aux Input 24 VCCcml_aux Power and ground ...

Page 17

... CP ACCURACY 0 (VCC – 0 0.5 VCC –40 C < T < (VCC – 0.5 V) DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER Min Typ Max (Note 2) 50 0.1 2.0 0.3 100 (Note 3) 1000 100 (Note 3) 500 50 250 150 – j168 @ 800 MHz REF MAIN REF ...

Page 18

... DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER Table 8. Electrical Characteristics (Note (VDD = Unless Otherwise Noted) A Parameter Digital Pins High level input voltage Low level input voltage High level output voltage Low level output voltage Timing – Serial Interface Clock frequency Data and CS set up time to Clock rising Data and CS hold time after Clock rising Note 1: Performance is guaranteed only under the conditions listed in this Table and is not guaranteed over the full operating or storage temperature ranges ...

Page 19

... Main Synthesizer Loop Filter Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200706C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 11, 2009 DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER To Microprocessor 1 ...

Page 20

... Detail A All measurements are in millimeters Figure 17. SKY72301-22 28-Pin EP-TSSOP Package Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 20 September 11, 2009 • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • 200706C B ∅ ...

Page 21

... Cover tape size: 13.3 mm width 4. All measurements are in millimeters Figure 18. SKY72301-22 Tape and Reel Dimensions Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 200706C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice • September 11, 2009 DATA SHEET • ...

Page 22

... DATA SHEET • SKY72301-22 FREQUENCY SYNTHESIZER Ordering Information Model Name SKY72301-22 1.0 GHz Frequency Synthesizer Copyright © 2007, 2009 Skyworks Solutions, Inc. All Rights Reserved. Information in this document is provided in connection with Skyworks Solutions, Inc. (“Skyworks”) products or services. These materials, including the information contained herein, are provided by Skyworks as a service to its customers and may be used for informational purposes only by the customer ...

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