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PDF 73201-364LF Data sheet ( Hoja de datos )
| Número de pieza | 73201-364LF | |
| Descripción | SKY73201-364LF | |
| Fabricantes | Skyworks | |
| Logotipo |  |
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preliminary data sheet
SKY73201-364LF, SKY73202-364LF: Programmable
1–28 MHz 6th Order Low Pass Filters
Applications
l H igh-performance direct conversion receivers
• Software-defined radio basebands
• High-definition television tuners
• Medical imaging
• Flexible anti-aliasing and reconstruction filters
Features
• 6th order Butterworth low pass filter
• Exceptionally high dynamic range
• Auto-calibrated with clock reference, 20 MHz or 40 MHz nominal
• Programmable in steps from 1–28 MHz
• Nominal low pass filter step size of 1 MHz
• Single or dual channel configuration
• Serial bus control
• 5 x 5 mm QFN package
l L ead (Pb)-free, RoHS-compliant, and Green™,
MSL-3 @ 260 °C per JEDEC J-STD-020
NEW Skyworks Green™ products are RoHS (Restriction
of Hazardous Substances)-compliant, conform to
the EIA/EICTA/JEITA Joint Industry Guide (JIG)
Level A guidelines, are halogen free according to
IEC-61249-2-21, and contain <1,000 ppm antimony
trioxide in polymeric materials.
Description
The SKY73201-364LF & SKY73202-364LF are high-performance,
programmable, monolithic, clock-referenced low-pass filters.
They are configured as a 6th order Butterworth to provide
extremely high stop-band isolation while maximizing pass-band
flatness and minimizing group delay distortion. The corner
frequency is programmable, via the 3-wire Serial Peripheral
Interface (SPI), in steps, from 1–28 MHz, when a 20 MHz or
40 MHz reference is used. Nearly ideal Butterworth performance
is maintained over temperature and process via a proprietary
internal calibration circuit which derives its timing accuracy from
the reference clock. Nominal reference clock frequencies of
20 MHz or 40 MHz are recommended to meet the specifications
outlined in this data sheet but other reference clock frequencies
can be accommodated with appropriate changes to the
control register settings. The corner frequency range can be
extended beyond 28 MHz by the use of alternate reference clock
frequencies and modified control register settings. Please contact
Skyworks Solutions applications engineering for assistance with
your requirements.
Additionally, the SKY73201-364LF & SKY73202-364LF offer excel-
lent linearity and input noise level (83 dB SNR at 1 MHz corner
setting), making them suitable for extremely high dynamic range
applications such as adjacent channel rejection filters in direct con-
version receivers. The I/O interface is fully differential, but may also
be used single-ended, and on-chip input/output drivers allow easy
integration between modern system components such as mixers,
data converters, and variable gain amplifiers.
The dual configuration of SKY73202 offers the convenience of having
two channels (such as the I and Q in vector demodulation) with
closely matched characteristics that track each other. Both filters
are programmed to the same settings by the common SPI interface.
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200755 Rev. C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 1, 2008
1
1 page  
SKY73201-364LF Pin Out Diagram
32 31 30 29 28 27 26 25
NC 1
24 ManSel/Cal_EN
NC 2
NC 3
23 HighEdge
22 LowEdge
NC 4
NC 5
SKY73201-364LF
21 Tuned
20 CLR_reg
VSS 6
In_n 7
19 SPI_Data
18 SPI_CLK
In_p 8
17 SPI_LE
9 10 11 12 13 14 15 16
preliminary Data Sheet • Sky73201-364LF, SKY73202-364LF
www.DataSheet4U.com
SKY73201-364LF Pin Descriptions
Pin # Name
Description
1
N/C No connection
2
N/C No connection
3
N/C No connection
4
N/C No connection
5
N/C No connection
6
7
VSS Ground
In_n Filter input -
8
In_p Filter input +
9
ManSel_0
Connect to GND in auto tuning mode(1)
10
ManSel_1
Connect to GND in auto tuning mode(1)
11
ManSel_2
Connect to GND in auto tuning mode(1)
12
ManSel_3
Connect to GND in auto tuning mode(1)
13
ManSel_4
Connect to GND in auto tuning mode(1)
14
ManSel_5
Connect to GND in auto tuning mode(1)
15
16
17
VSS
VSS
SPI_LE
Ground
Ground
SPI latch enable (see timing diagram)
18
SPI_CLK
SPI clock Input
19
SPI_DATA
SPI serial data (bi-directional I/O)
20
CLR_reg Normally set LOW; set HIGH to clear all
registers to zero
21
Tuned Filter tuned indication; HIGH when filter is
settled
22
LowEdge No connect (filter settle error indicator,
debug only)
23
HighEdge No connect (filter settle error indicator,
debug only)
24
ManSel/Cal_EN Manual mode enable/calibration enable;
Held HIGH for manual mode(1). In automatic
mode, it is normally LOW but must be
toggled HIGH then LOW to start/reset the
autocal circuit (see timing diagram)
25
Out_n
Filter output -
26
Out_p
Filter output +
27
Clk_sel Reference clock select; connect to VDD
if Ref_Clk is 40 MHz, connect to VSS if
Ref_Clk is 20 MHz
28
Ref_Clk Reference clock; selectable 20 or 40 MHz
(needed during calibration only)
29
VDD Power supply (+3.3 VDC)
30
VDD Power supply (+3.3 VDC)
31
ENABLE Chip enable; chip is enabled when HIGH
(VDD), standby mode when LOW (VSS)
32
VSS Ground (GND)
Paddle Must be connected via lowest possible
impedance to ground for proper electrical
and thermal performance
1. The manual select pins are for manual fine tuning of the filter corner frequency. Normally
these inputs are grounded since tuning is performed by the automatic calibration circuit
operating with the reference clock. If the “ManSel” pin (24) is set high, then pins 9-14
would be active to perform fine tuning by the user (but in this case auto cal would not be
operational and the filter would not be clock referenced).
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200755 Rev. C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 1, 2008
5
5 Page 
preliminary Data Sheet • Sky73201-364LF, SKY73202-364LF
www.DataSheet4U.com
Evaluation Board Description
Evaluation boards for the SKY73201 and SKY73202 support both
stand-alone evaluation and automated evaluation via the use of
personal computer (PC) software to control the configuration of
the filters through the PC’s serial port. The onboard microcon-
troller configures the filter based on input from either the onboard
pair of push buttons in stand-alone mode or from the serial port
in automated mode. In the automated mode, all of the control
parameters can be set to any valid register value, allowing evalu-
ation over the full performance range. In stand-alone mode the 2
digit display will accurately display the selected corner frequency.
There is an onboard oscillator (X1) to provide the clock for the
micro controller and a separate oscillator (U3) as the filter’s refer-
ence clock. Three LEDs are provided to indicate the current state
of the filter’s auto calibration feature.
Evaluation Board
(With On-Board Micro-Controller)
SKY73201
SKY73202
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • [email protected] • www.skyworksinc.com
200755 Rev. C • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • October 1, 2008
11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet 73201-364LF.PDF ] | |
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