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skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 1 sky73201-364lf, SKY73202-364LF: programmable 1C28 mhz 6th order low pass filters preliminary data sheet applications l high-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 1C28 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 lead (pb)-free, rohs-compliant, and green?, msl-3 @ 260 c per jedec j-std-020 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 1C28 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 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. new
skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 2 2 sky73201-364lf functional block diagram te mp erat ur e co mp ensa ti on au to ca librat io n spi c ont ro l i nput bu ffe r out put bu ffer 6th order bu tte rw or th i nput out put se ri al in te rf ac e re fe renc e cl oc k i nput SKY73202-364LF functional block diagram te mperature compensatio n auto calibration spi control input buffer output buffer 6th order butterworth 6th order butterworth input 1 output 1 serial interface reference clock input input buffer output buffer output 2 input 2 characteristic value supply voltage 4.5 v supply current 100 ma signal input level 3 v pp operating temperature -40 c to +85 c storage temperature -65 c to +85 c absolute maximum ratings performance is guaranteed only under the conditions listed in the specifications table and is not guaranteed under the full range(s) described by the absolute maximum specifications. exceeding any of the absolute maximum/minimum specifications may result in permanent damage to the device and will void the warranty. caution: although this device is designed to be as robust as possible, esd (electrostatic discharge) can damage this device. this device must be protected at all times from esd. static charges may easily produce potentials of several kilovolts on the human body or equipment, which can discharge without detection. industry-standard esd precautions must be employed at all times.
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 3 parameter condition frequency min. typ. max. unit dc operating conditions supply voltage 3 3.3 3.6 v dc current sky73201-364lf SKY73202-364LF 32 59 ma ma signal performance lowpass filter corner 6-pole butterworth using an accurate 20 mhz or 40 mhz clock reference (4) 1 28 mhz lowpass filter step size 1 mhz lowpass corner frequency accuracy using an accurate 20 mhz or 40 mhz clock reference (4) 1 5 % lowpass rejection suppression at 2 x (3 db corner frequency) 35 db ultimate rejection level measured differentially 80 db lowpass ripple 10 khz to 0.8 x (3 db corner frequency) 0.5 1 db lowpass group delay variation (2) for 10 mhz setting; from 10 khz to 0.8 x (3 db corner frequency) 35 44 ns lowpass group delay variation (2) for 28 mhz setting; from 10 khz to 0.8 x (3 db corner frequency) 12 16 ns isolation between channel 1 and channel 2 (sky73202) measured differentially 60 db interface specifications gain (1) selectable 0 6 dbv input load differential 10kll 2 w ll pf input-referred noise at 6 db gain setting 25 nv/ ? hz input common mode voltage range 0.8 2.5 v input 1 db compression 0 db gain setting 1.2 v d pp input snr at 1 mhz corner setting 80 83 db output drive capability (3) differential 1000 5000 output load capacitance 15 pf common-mode voltage 1.35 1.50 1.70 v output linear signal swing 1 db compression level; differential 1.2 2.0 v d pp operating characteristics v dd = 3.3 v, t = 25 c, unless otherwise noted 1. gain in dbv = 20log 10 (v out_rms /v in_rms ), independent of impedance. 2. group delay scales inverse-linearly with cutoff frequency; average group delay variation = 350 ns/ cutoff_in_mhz 3. a 50 + 50 w load may be driven but voltage gain may be reduced and signal-linearity may be aff ected. the overall filter shape should be preserved. 4. the reference clock signal must have a duty cycle of 50%.
skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 4 f ilt er re s pons e wi th 3 db cu to ff t une d to 14 mh z f requenc y (mhz) ma gni t ude (d b) 05 10 15 20 25 30 35 20 0 40 60 80 100 120 gr oup de lay (n s) -4 5 -4 0 -3 5 -3 0 -2 5 -2 0 -1 5 -1 0 -5 0 gr oup de lay (n s) ma gni t ude (d b) f ilt er re s pons e wi th 3 db cu to ff t une d to 8 mh z f requenc y (mhz) ma gni t ude (d b) -7 0 -6 0 -5 0 -4 0 -3 0 -2 0 -1 0 0 05 10 15 20 25 30 35 20 40 60 80 100 120 140 160 gr oup de lay (n s) gr oup de lay (n s) ma gni t ude (d b) typical performance data v dd = 3.3 v, t = 25 c, unless otherwise noted programmable filter amplitude response -100 -8 0 -6 0 -4 0 -2 0 0 20 02 04 06 08 0 100 1201 40 f requenc y (mhz) attenuation (db) 1 mhz 2 mhz 3 mhz 4 mhz 5 mhz 6 mhz 7 mhz 8 mhz 9 mhz 10 mhz 11 mhz 12 mhz 13 mhz 14 mhz 15 mhz 16 mhz 17 mhz 18 mhz 19 mhz 20 mhz 21 mhz 22 mhz 23 mhz 24 mhz 25 mhz 26 mhz 27 mhz 28 mhz
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 5 sky73201-364lf pin out diagram nc nc nc nc nc v ss i n_n i n_p v ss v dd v ss v ss spi_c lk spi_data 16 15 14 12 11 10 9 7 6 5 1 2 3 4 8 13 27 26 24 23 22 17 18 19 20 21 25 28 29 30 31 32 sky73201-364lf mansel_5 mansel_4 mansel_3 mansel_2 mansel_1 mansel_0 spi_le cl r_reg tune d lowe dge highe dge m ans el/cal_en ref_clk clk_sel v dd out_n out_p enable sky73201-364lf pin descriptions p in # n ame 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 v ss ground 7 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 v ss ground 16 v ss ground 17 spi_le 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 v dd if ref_clk is 40 mhz, connect to v ss if ref_clk is 20 mhz 28 ref_clk reference clock; selectable 20 or 40 mhz (needed during calibration only) 29 v dd power supply (+3.3 v dc ) 30 v dd power supply (+3.3 v dc ) 31 enable chip enable; chip is enabled when high (v dd ), standby mode when low (v ss ) 32 v ss 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 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 6 SKY73202-364LF pin out diagram enable v dd v dd v ss i n_1_n i n_1_p i n_2_n i n_2_p v dd v ss v ss spi_c lk spi_data 16 15 14 12 11 10 9 7 6 5 1 2 3 4 8 13 27 26 24 23 22 17 18 19 20 21 25 28 29 30 31 32 SKY73202-364LF mansel_5 mansel_4 mansel_3 mansel_2 mansel_1 mansel_0 spi_le cl r_reg tune d lowe dge highe dge ma ns el/cal_en ref_clk clk_sel v dd out_1_n out_1_p out_2_n out_2_p SKY73202-364LF pin descriptions p in # n ame description 1 enable chip enable; chip is enabled when high (v dd ), standby mode when low (v ss ) 2 mansel_0 connect to gnd in auto tuning mode (1) 3 mansel_1 connect to gnd in auto tuning mode (1) 4 mansel_2 connect to gnd in auto tuning mode (1) 5 mansel_3 connect to gnd in auto tuning mode (1) 6 mansel_4 connect to gnd in auto tuning mode (1) 7 mansel_5 connect to gnd in auto tuning mode (1) 8 v ss ground 9 in_1_p filter no. 1 input + 10 in_1_n filter no. 1 input - 11 v dd power supply (+3.3 v dc ) 12 v dd power supply (+3.3 v dc ) 13 in_2_p filter no. 2 input + 14 in_2_n filter no. 2 input - 15 v ss ground 16 v ss ground 17 spi_le 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_2_n filter no. 2 output - 26 out_2_p filter no. 2 output + 27 clk_sel reference clock select; connect to v dd if ref_clk is 40 mhz, connect to v ss if ref_clk is 20 mhz 28 ref_clk reference clock; selectable 20 or 40 mhz (needed during calibration only) 29 v dd power supply (+3.3 v dc ) 30 v dd power supply (+3.3 v dc ) 31 out_1_n filter no. 1 output - 32 out_1_p filter no. 1 output + 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 9C14 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).
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 7 serial i/o interface information the primary control interface is a three-wire bidirectional serial interface. the interface operates as slowly as dc, and as fast as 100 mbps. the three interface signals are spi_clk, spi_data and spi_le. the serial data bits are latched into the serial inter - face on each rising edge of spi_clk. data is latched into the target register by the rising edge of spi_le. there are 3 func - tional data registers, each containing 8 data bits. each register is independent and can be read or written in any order. each serial interface transaction, read/write, consists of 16 bits: 1 start bit, 2 reserved bits (0s), 1 read/write bit, 4 address bits followed by 8 data bits. see figure 1. the setup and hold timing requirements are shown in figure 2 and the spi interface timing requirements table. the spi_le line must have a setup time of (t1) before the first clock edge. all data bits must be held for a minimum of (t2) after the rising clock edge. the minimum setup time for any bit edge is (t3) before the rising edge of spi_clk. the spi_le signal must be held for a minimum time (t4) between transactions and held high when other spi devices on the bus are active. the calen signal must be toggled after all the register configuration is complete in order to initiate the auto calibration feature. the configuration of all the registers will require approximately 50 spi_clk cycles and the auto calibration will require approximately 50 ref_clk cycles. the tuned pin will go high at the successful completion of auto cali - bration and may be used to disable the reference clock source. on power up, all registers will be cleared to 0 and the filters inputs and outputs will be in an isolated state. all registers retain their data when enable is held to the standby state, ground. in this condition the filter inputs and outputs will be in an isolated state. when enable is taken to v dd , inputs and outputs will be in an isolated state until calen is toggled and auto calibration has completed. bi t 7 bi t 6 bi t 5 bi t 4 bi t 3 bi t 2 bi t 1 bi t 0 bi t 7 bi t 6 bi t 5 bi t 4 bi t 3 bi t 2 bi t 1 bi t 0 st ar t bit = 1 res e rve d = 0 res e rve d = 0 read / wr it e a3 a2 a1 a0 d7 d6 d5 d4 d3 d2 d1 d0 address byt e da ta byt e figure 1. spi transaction bit definitions spi_clk spi_le spi_data cal_en register read back is optional and is not required for normal function. *r/w bit sets direction of data line for serial read-back; read = 0, write = 1. ** cal_en line is toggled after all registers are written. d0 d1 d2 d3 d4 d5 d6 d7 a0 a1 a2 a3 t1 t2 t3 t4 t5 r/w start reserved figure 2. spi register configuration timing diagram p arameter description min unit t1 setup time le to data 5 ns t2 hold time clk to data 5 ns t3 setup time data to clk 5 ns t4 le width 10 ns t5 le to calen 10 ns spi register map detail sky73201 & sky73202 configuration register map spi interface timing requirements address bit field 0 [2:0] resskewctr corner frequency fine tune [7:3] resdacctr calibration constant 1 [4:0] resctr calibration constant [6:5] bandsel sets filter corner frequency [7] reserved write to zero 2 [4:0] gainctr sets filter gain [7:5] reserved write to zero
skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 8 6 db gain configuration register lookup table 3 db cutoff a ddress 0 a ddress 1 a ddress 2 (mhz) (hex) (hex) (hex) 1 0f 01 01 2 17 02 02 3 1f 03 03 4 27 04 04 5 2f 05 05 6 37 06 06 7 3f 07 07 8 47 08 08 9 4f 09 09 10 57 0a 0a 11 64 0c 0c 12 6c 0d 0d 13 75 0e 0e 14 7d 0f 0f 15 80 10 10 16 88 11 11 17 90 12 12 18 a4 14 14 19 ac 15 15 20 b5 16 16 21 bd 17 17 22 c5 18 18 23 cd 19 19 24 dc 1a 1a 25 e4 1b 1b 26 ec 1c 1c 27 f4 1d 1d 28 f0 1e 1e 660 khz (uncalibrated) 10 62 02 330 khz (uncalibrated) 08 61 01 0 db gain configuration register lookup table 3 db cutoff a ddress 0 a ddress 1 a ddress 2 (mhz) (hex) (hex) (hex) 1 0f 01 01 (1) 2 17 02 01 3 1f 03 01 (1) 4 27 04 02 5 2f 05 02 (1) 6 37 06 03 7 3f 07 03 (1) 8 47 08 04 9 4f 09 04 10 57 0a 05 11 64 0c 06 12 6c 0d 07 13 75 0e 07 14 7d 0f 08 15 80 10 08 16 88 11 08 17 90 12 09 18 a4 14 0a 19 ac 15 0b 20 b5 16 0b 21 bd 17 0c 22 c5 18 0c 23 cd 19 0d 24 dc 1a 0d 25 e4 1b 0e 26 ec 1c 0e 27 f4 1d 0f 28 f0 1e 0f 660 khz (uncalibrated) 10 62 01 330 khz (uncalibrated) 08 61 01 (1) 1. this value will give the closest available gain setting. the resulting gain will not meet overall specification. please test for application suitability.
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 9 qfn 5 x 5 (-364) pin 1 indicator 5.00 0.05 5.00 0.05 0.90 0.10 seating plane 0.02 + 0.03 0.02 - 0.02 0.20 ref. exposed pa d detail b detail a 1.575 + 0.050 1.575 - 0.075 1.575 + 0.050 1.575 - 0.075 3.15 + 0.10 3.15 - 0.15 3.15 + 0.10 3.15 - 0.15 r0.30 0.40 0.01 0.25 + 0.05 0.25 - 0.07 r0.12 t yp. detail c detail b l c 0.25 0.5 datum a or b land pattern detail a exposed soldering area 0.28 0.60 32x 2.05 3.15 sq. 5x plated thru vias see detail a pitch 0.50 0.25 t yp. recommended solder reflow profiles refer to the ?recommended solder reflow profile? application note. t ape and reel information refer to the ?discrete devices and ic switch/attenuators ta pe and reel p ackage orientation? application note .
skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 10 basic application diagram nc nc nc nc nc v ss i n_n i n_p v ss v dd v ss v ss spi_c lk spi_data 16 15 14 12 11 10 9 7 6 5 1 2 3 4 8 13 27 26 24 23 22 17 18 19 20 21 25 28 29 30 31 32 sky73201-364lf mansel_5 mansel_4 mansel_3 mansel_2 mansel_1 mansel_0 spi_le cl r_reg t uned lowe dge highe dge m ans el/cal_en ref_clk clk_sel v dd out_n out_p enable v in from sp i controlle r bypass capacitors v out 3.3 v v dd fo r 40 mh z v ss for 20 mh z tu rn re f_ clk of f wh en hi gh
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 11 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 pcs 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 filters refer - ence clock. three leds are provided to indicate the current state of the filters auto calibration feature. evaluation board (with on-board micro-controller) sky73201 sky73202
skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 12 sky73201 evaluation board schematic a b c d e f g dp a 7 b 8 c 3 d 2 e 1 f 1 0 g 4 dp 5 c a th l c a th r s m a_ 50 oh m s m a_ 50 oh m s m a_ 50 oh m s m a_ 50 oh m s p dt s p dt u 1 ic 1 x 1 h 1 c 1 10 pf c 2 10 pf g n d v c c g n d t 1 r 1 np r 2 0 g n d r 3 3 3 0 d 1 re d v c c g n d v c c c 3 1 n f c4 np r 4 3 3 0 d 2 re d v c c d 3 bl ue r 5 n p g n d g n d g n d v d d r 6 n p r 7 n p r 8 n p r 9 0 v d d g n d t 2 t 3 t 4 r 1 0 1 0 k r 1 1 1 0 k r 1 2 1 0 k r 1 3 r 1 4 330 r 1 5 330 d 4 wh it e d 5 re d d 6 gr ee n l t d - 2701 b1 t 5 t 6 r1 6 0 r 1 7 0 r 1 8 0 r 1 9 0 r2 0 0 r 2 1 0 r 2 2 0 r 2 3 0 r 2 6 0 v c c r f c 1 r f c 2 r f c 3 r f c 4 g n d g n d r 2 8 n p h 2 g n d g n d v c c v d d g n d c 5 100 p c 6 1 n c 7 10 n c 8 100 p c 9 1 n c 1 0 10 n r 2 9 np g n d do wn u p g n d u 6 h 1 v d d g n d h 3 g n d g n d r2 4 1 k r 2 5 1 k g n d u 3 c 1 1 g n d n c 1 n c 2 n c 3 n c 4 n c 5 v s s 6 in _ n 7 in _ p 8 m a n s e l n _ 0 9 m a n s e l n _ 1 10 m a n s e l n _ 2 11 m a n s e l n _ 3 12 m a n s e l n _ 4 13 m a n s e l n _ 5 14 v s s 15 v s s 16 s p i_ l e 17 s p i_ c l k 18 s p i_ d a t a 19 c l r _ r e g 20 t u ne d 21 l o we dg e 22 h i gh e d ge 23 ma ns el /c a l _e n 24 o u t_ n 25 o u t _ p 26 c l k _ s e l 2 7 r e f_ c l k 2 8 2 9 v d d 3 0 e n a b le 3 1 v s s 3 2 p c 6 _ ( r e s e t) 2 9 p d 0 _ ( r x d ) 3 0 p d 1 _ ( t x d ) 3 1 p d 2 _ ( i n t 0 ) 3 2 p d 3 _ ( i n t 1 ) 1 p d 4 _ ( x c k / t 0 ) 2 v c c 6 g n d 5 p b 6 _ ( x t a l 1 / t o s c 1 ) 7 p b 7 _ ( x t a l 2 / t o s c 2 ) 8 p d 5 _ ( t 1 ) 9 p d 6 _ ( a in 0 ) 1 0 p d 7 _ ( a in 1 ) 1 1 p b 0 _ ( i c p ) 1 2 p b 1 _ ( o c 1 a) 1 3 p b 2 _ ( s s / o c 1 b 1 4 p b 3 _ ( m o s i / o c 2 ) 1 5 p b 4 _ ( m is o ) 1 6 p b 5 _ ( s c k ) 1 7 a v c c 1 8 a r e f 2 0 g n d 2 1 p c 0 _ ( a d c 0 ) 2 3 p c 1 _ ( a d c 1 ) 2 4 p c 2 _ ( a d c 2 ) 2 5 p c 3 _ ( a d c 3 ) 2 6 p c 4 _ (a d c 4 / s d a ) 2 7 p c 5 _ (a d c 5 / s c l) 2 8 g n d 3 v c c 4 a d c 6 1 9 a d c 7 2 2 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 1 0 g n d in / out g n d g n d in / out g n d g n d in / out g n d g n d in / out g n d 1 2 3 4 5 6 3 2 4 1 3 2 4 1 1 1 2 3 4 5 6 7 8 9 1 2 3 4 1 2 3 4 5 6 n c 3 g n d 4 o u tp ut 2 v d d 1 v d d nc nc nc nc nc nc nc nc 330 g n d v d d
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 13 sky73202 evaluation board schematic a b c d e f g dp a 7 b 8 c 3 d 2 e 1 f 1 0 g 4 dp 5 c a th l c a th r s p dt s p dt ic 1 x 1 h 1 c 1 10 pf c 2 10 pf g n d v c c g n d t 1 r 1 np r 2 0 g n d r 3 3 3 0 d 1 re d v c c g n d v c c c 3 1 n f c4 np r 4 3 3 0 d 2 re d v c c d 3 bl ue r 5 np t 2 t 3 t 4 r 1 0 1 0 k r 1 1 1 0 k r 1 2 1 0 k r 1 3 r 1 4 330 r 1 5 33 0 d 4 wh it e d 5 re d d 6 gr ee n l t d - 2701 b1 t 5 t 6 r1 6 0 r 1 7 0 r 1 8 0 r 1 9 0 r2 0 0 r 2 1 0 r 2 2 0 r 2 3 0 r 2 6 0 v c c v d d g n d c 5 100 p c 6 1 n c 7 10 n c 8 100 p c 9 1 n c 1 0 10 n g n d do wn u p g n d u 6 h 1 v d d g n d r2 4 1 k r 2 5 1 k g n d p c 6 _ ( r e s e t) 2 9 p d 0 _ ( r x d ) 3 0 p d 1 _ ( t x d ) 3 1 p d 2 _ ( i n t 0 ) 3 2 p d 3 _ ( i n t 1 ) 1 p d 4 _ ( x c k / t 0 ) 2 v c c 6 g n d 5 p b 6 _ ( x t a l 1 / t o s c 1 ) 7 p b 7 _ ( x t a l 2 / t o s c 2 ) 8 p d 5 _ ( t 1 ) 9 p d 6 _ ( a in 0 ) 1 0 p d 7 _ ( a in 1 ) 1 1 p b 0 _ ( i c p ) 1 2 p b 1 _ ( o c 1 a ) 1 3 p b 2 _ ( s s / o c 1 b 1 4 p b 3 _ ( m o s i / o c 2 ) 1 5 p b 4 _ ( m is o ) 1 6 p b 5 _ ( s c k ) 1 7 a v c c 1 8 a r e f 2 0 g n d 2 1 p c 0 _ ( a d c 0 ) 2 3 p c 1 _ ( a d c 1 ) 2 4 p c 2 _ ( a d c 2 ) 2 5 p c 3 _ ( a d c 3 ) 2 6 p c 4 _ (a d c 4 / s d a ) 2 7 p c 5 _ (a d c 5 / s c l) 2 8 g n d 3 v c c 4 a d c 6 1 9 a d c 7 2 2 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 1 0 3 2 4 1 3 2 4 1 1 1 2 3 4 5 6 7 8 9 1 2 3 4 nc nc 330 g n d v d d u 1 gn d vd d r f c 1 r f c 2 r f c 3 r f c 4 gn d g n d r 2 8 n p r 2 9 n p vd d vd d r f c 5 r f c 6 gn d r 2 7 n p r f c 8 r f c 7 gn d r 3 0 np p a dd le _g nd 1 2 3 4 5 vs s 6 in _ 1 _ n 7 i n _ 1 _ p 8 ma ns el n _ 0 9 ma ns el n _ 1 10 ma ns el n _ 2 11 ma ns el n _ 3 12 ma ns el n _ 4 13 ma ns el n _ 5 14 v s s 15 v s s 16 sp i _ le 17 sp i _ c l k 18 sp i _ da ta 19 c l r _ r e g 20 tu ne d 21 lo we dg e 22 hi gh ed ge 23 ma ns el /c al _e n 24 o u t_ 2_ n o u t_ 2 _ p c l k _ s e l r e f_ cl k v d d en ab le v d d v d d v d d i n _2 _n i n _2 _p o u t_ 1_ n o u t_ 1 _ p 32 31 30 29 28 27 26 25 g n d v d d r 6 n p r 7 n p r 8 n p r 9 0 v c c u 3 c 1 1 g n d n c 3 g n d 4 o u tp u t 2 v d d 1 g n d u 3
skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 14 sky73201 evaluation board assembly drawing single-ended test configuration this setup uses conventional rf test equipment (rf signal generator and spectrum analyzer may be used instead of vna). fully differential test configuration differential arbitrar y wa veform generator (agilent esg4438c, rs amiq, etc.) sky73201 evaluation boar d 500 mv differential, pe ak-p eak dc common mode = 1.7 v sinusoidal output in+ in- 4 channel oscilloscope function 1 = (ch1-ch2) function 2 = (ch3-ch4) ch 1 ch 2 ch 3 ch 4 out+ out- 3.3 v dc po wer supply , 250 ma v ector network analyzer (power = -20 dbm) po rt 1 (ac coupled) po rt 2 (ac coupled) dc block or bias-t ee 50 ohm te rm. sky73201 evaluation boar d in+ in- out+ out- 3.3 v dc po wer supply , 250 ma dc block or bias-te e 50 ohm te rm. note: dc blocks and terminations are placed on unused differential ports.
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 15 application notes all current application notes are available on the web at http:// www.skyworksinc.com evaluation boards 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 pcs 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 corner frequency set - ting. there is an onboard oscillator (x1) to provide the clock for the micro controller and a separate oscillator (u3) to provide the filters reference clock. three leds are provided to indicate the current state of the filters auto calibration feature. on the evaluation boards, the reference clock and the microcon - troller clock are active continuously and can be potential noise sources. in applications demanding high signal purity, these potential noise sources can be eliminated after the configuration and auto calibration are completed. to test the device without the reference clock, microcontroller, microcontroller clock and display operating, the following procedure is recommended: 1) remove the soldered-in-wire jumper between pins #1 and #2 of the dc power connector h1. 2) connect a 3.3 v supply to pin #1 of h1 to power the microcontroller and the clock sources and connect a second independent 3.3 v supply to pin #2 of h1 to power only the filter. 3) with both supplies enabled, set the configuration registers as required. once the auto calibration has completed, the white led (d4) will illuminate, indicating that the filter is tuned. 4) disable the power supply connected to pin #1. this will disable everything on the evaluation board except the filter, which will hold the correct tuned state. 5) in this configuration, any possible spurs due to clock signals are eliminated. programming and calibration procedure and intervals register configuration time: this operation requires a minimum of 50 spi clock cycles to write all three configuration registers. the fastest supported spi clock speed is 100 mhz, which will result in a minimum configuration time of 500 ns. automatic calibration: after all of the registers have been written, the cal_en pin must be toggled (i.e. raised high and then low). the auto calibration starts on the negative edge of cal_en. during this process, the reference clock (nominally 20 mhz) must be present to provide the timing information. the calibra - tion process may take up to 50 reference clock cycles. when calibration is complete, the tuned pin will go high, indicating that the calibration has successfully completed. the output of the tuned pin may be used to gate off the reference clock as it is not required for standard operation. this is preferred in applica - tions where possible spurs related to the clock and its harmonics may cause undesired degradation of the signal. for devices used in the auto tuning mode only, the mansel_0 through mansel_5 pins should be grounded (not left floating). setup time: if both the spi clock and reference clock are selected to be 20 mhz, the entire filter corner frequency configuration & calibration procedure may take up to 5 s (corresponding to 50 + 50 = 100 clock cycles). manual calibration: after the registers are configured, the device may also be calibrated (fine-tuned) manually through the use of the mansel/calen pins. manual tuning mode is enabled by holding the mansel pin high. this allows the mansel_0 through mansel/calen_5 pins to operate as a 6-bit parallel bus whose binary value adjusts the cutoff frequency of the filter. for more details on this mode of operation, please consult skyworks. general layout recommendations: 1) keep all analog traces differential (equal length, no ground in between) 2) place multiple vias on the outside of the differential pairs (but not between the differential lines) 3) route all other traces perpendicularly across the differential pair, and never between the analog lines and their ground reference 4) locate all decoupling capacitors as close to the device as possible, place multiple ground vias on the capacitors 5) place as many ground vias under the filter paddle as possible.
skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 16 reference clock selection for best filter corner frequency accuracy, a crystal-based clock (as opposed to ceramic), with an accuracy better than 1000 ppm over temperature, aging, and process is recommended. the clock input to the sky73201/2 is cmos logic (threshold approx. 1.7 v) so most clocks that operate on a 3.3 v supply should be compat - ible. in addition, the duty cycle of the clock affects filter corner accuracy. the closer the duty cycle is to 50%, the more accurate the filter corner setting. the nominal clock frequencies are 20 mhz, with clk_sel tied to ground, or 40 mhz with clk_sel tied to v dd . alternate reference clock frequencies in a range of 20% can usually be accommodated with appropriate changes to the configuration register values. alternate reference clock fre - quencies may also allow a wider range of corner frequencies of approximately 20% with appropriate changes to the configura - tion register values. output drive capability the sky73201 and sky73202 have op-amp based output drivers, whose effective source impedance is in the few 10s of ohms range and a current drive capability of approximately 2C3 ma. while it is intended to drive a high impedance data converter or a pga, it can also drive a 100 w differential load (or a 50 w single-ended load) at a reduced gain level. as long as the output voltage swing required does not push the output drivers into current clipping, the filter shape will be maintained at a reduced gain. please note that the gain values that are speci - fied in the datasheet are based on the specified, high, input and output impedances. filter gain setting the sky73201 and sky73202 allow approximately 6 db of adjustment over gain in addition to the ability to set the 3 db cutoff frequency for fine-tuning the filter gain. the gain may be controlled by adjusting the gainctr register value, address2[4:0]. the gain is a linear ratio expressed in terms of the gainctr register value and the resctr register value, address1[4:0], that sets the filter cut-off frequency address2<4:0> gainctr gain = 2 ? = 2 ? address1<4:0> resctr note: for the linear gain calculation, please use the decimal equivalents of the binary representations in the above ratio. the configuration procedure involve determining the appropriate values for the desired corner frequency (from register configu - ration tables) and then modifying the gainctr value in register address2[4:0] for the desired gain. example (for a 14 mhz filter corner setting): gain adjustment example gain address0 address1 address2 6 db 7d 0f 0e 3 db 7d 0f 0b 0 db 7d 0f 08 as an example, the effect of the gainctr register value, address 2[4:0], for the 28 mhz corner setting is shown in the plot below. the 0 setting corresponds to open circuit and decimal 31 setting corresponds to maximum gain. sky73201 gain vs. register settin g -4 5 -4 0 -3 5 -3 0 -2 5 -2 0 -1 5 -1 0 -5 0 5 10 05 10 15 20 25 30 gain control register setting (0-31 decimal) gain [db]
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 17 input and output interface and common-mode voltage at the input, the common-mode voltage must be supplied by the device driving the filter. at the output, the filter biases itself to a common-mode voltage that is approximately half of the v dd . (e.g. 3.3*1/2 = 1.65 v). the output common-mode voltage setting is independent of the input common-mode voltage. only the differ - ential component of the input signal will pass through the filter. the device requires a minimum of 1 k w load (500 w each arm) in order to maintain full gain performance. this accommodates a majority of available data converters. if the device immediately before the programmable filter has a different common-mode voltage (e.g. 3.5 v from a 5 v device), then a matching network may be used to convert the 3.5 v offset to 1.65 v. this may be done with two series resistors into the + and C arms and a shunt resistor between the two. (shunt resistor value on the order of 1k w ). careful selection of the values of the resistors is required so as to not add extra noise at the input and degrade the input referred noise of the device. (the input referred noise is specified assuming 1C2 k w input loading resistors.) single-ended to differential configuration to use the programmable filter with a single-ended input signal and a differential output signal, simply apply the single-ended input signal to one of the input ports and apply a dc midpoint voltage (equal to the average level of the signal) to the other input port. interfacing to the sky73201 and sky73202 filters figure 3 shows a simplified schematic of the inputs to the sky73201 filter. the input stage is a 2-stage op-amp with bipolar transistor input, which implies that the preceding stage must supply the base current and a common-mode voltage. a common-mode base voltage of 1.65 v should be applied to the inputs. any external resistance in series with pins 7 and 8 will reduce the gain of the filter. (the same recommendations apply to the inputs of the sky73202 filter.) figure 4 shows a simplified schematic of the output buffer of the sky73201. the device generates a common-mode voltage of 1.65 v at the output and the output buffers are designed to drive a minimum of 5 k w impedance. if the device is loaded with a resistance lower than 5 k w , it will cause loss in signal swing, which may reduce the gain and affect the signal linearity. (the same recommendations apply to the sky73202 filter.) i b i b pin 8 1.65 v pin 7 1.66 v sky73201-364lf figure 3. simplified schematic of input pin 26 1.65 v pin 25 1.65 v cm f eedback amplifier sky73201-364lf figure 4. simplified schematic of the filter output
skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com october 1, 2008 ? skyworks proprietary information ? products and product information are subject to change without notice. ? 200755 rev. c preliminary data sheet ? sky73201-364 l f, SKY73202-364LF 18 output common-mode compensation if the stage following the sky73201 or sky73202 requires a common-mode voltage that is lower or higher than 1.65 v, the new common-mode voltage can be established by simple resis - tive voltage division. figure 5 shows a simple application circuit in which the sky73201 filter is used to drive a 1.8 v data con - verter with an input common-mode voltage of 0.9 v. it is important to design adequate supply bypassing by means of bypassing capacitors as any noise coupled into the device may affect the corner frequency accuracy. the exact values of the bypass capacitors will depend on the application environment. nc nc nc nc nc v ss i n_n i n_p v ss v dd v ss v ss spi_c lk spi_data 16 15 14 12 11 10 9 7 6 5 1 2 3 4 8 13 27 26 24 23 22 17 18 19 20 21 25 28 29 30 31 32 sky73201-364lf mansel_5 mansel_4 mansel_3 mansel_2 mansel_1 mansel_0 spi_le cl r_reg t uned lowe dge highe dge m ans el/cal_en ref_clk clk_sel v dd out_n out_p enable v in from sp i controlle r bypass capacitors 2.7 k 3.3 k 2.7 k 3.3 k 3.3 v v dd fo r 40 mh z v ss for 20 mh z tu rn re f_ clk of f wh en hi gh v out figure 5. sky73201 application circuit with 0.9 v output common-mode voltage
preliminary data sheet ? sky73201-364 l f, SKY73202-364LF skyworks solutions, inc. ? phone [781] 376-3000 ? fax [781] 376-3100 ? sales@skyworksinc.com ? www.skyworksinc.com 200755 rev. c ? skyworks proprietary information ? products and product information are subject to change without notice. ? october 1, 2008 19 copyright ? 2007, 2008, skyworks solutions, inc. all rights reserved. information in this document is provided in connection with skyworks solutions, inc. (skyworks) p roducts 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 c ustomer. skyworks assumes no responsibility for errors or omissions in these materials or the information contained herein. skyworks may change its documentation, products, services, specific ations or product descriptions at any time, without notice. skyworks makes no commitment to update the materials or information and shall have no responsibility whatsoever for conflicts, incomp atibilities, or other difficulties arising from any future changes. no license, whether express, implied, by estoppel or otherwise, is granted to any intellectual propert y rights by this document. skyworks assumes no liability for any materials, products or information provided hereunder, including the sale, distribution, reproduction or use of skyworks pr oducts, information or materials, except as may be provided in skyworks terms and conditions of sale. the materials, products and information are provided as is without warranty of any kind, whether express, implied, statutory, or otherwise, including fitness for a particular purpose or use, merchantability, performance, quality or non-infringement of any intellectual property right; all such warranties are hereby expressly disclaimed. skyworks does not warrant the accuracy or completeness of the information, text, graphics or other items contained within these materials. skyworks shall not be liable for any damages, including but not limited to any special, indirec t, incidental, statutory, or consequential damages, including without limitation, lost revenues or lost profits that may result from the use of the materials or information, whether or not the recipient of materials has been advised of the possibility of such damage. skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or o ther equipment in which the failure of the skyworks products could lead to personal injury, death, physical or environmental damage. skyworks customers using or selling skyworks products f or use in such applications do so at their own risk and agree to fully indemnify skyworks for any damages resulting from such improper use or sale. customers are responsible for their products and applications using skyworks products, which may d eviate from published specifications as a result of design defects, errors, or operation of products outside of published parameters or design specifications. customers should include design and operating safeguards to minimize these and other risks. skyworks assumes no liability for applications assistance, customer product design, or damage to any equipment resulting from the u se of skyworks products outside of stated published specifications or parameters. skyworks, the skyworks symbol, and breakthrough simplicity are trademarks or registered trademarks of skyworks solutions, inc., in the united states and other countries. third-party brand s and names are for identification purposes only, and are the property of their respective owners. additional information, including relevant terms and conditions, posted at www.skyworksinc.c om, are incorporated by reference.

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