page 1 of 7 the SP43204 is a 50 ? , harp?-enhanced, high linearity, 2-bit rf digital step attenuator (dsa) covering an 18 db attenuation range in 6 db steps. with a parallel control interface, it maintains high attenuation accuracy, fast switching speed, low insertion loss and low power consumption. this next generation peregrine dsa is available in a 3x3 mm 12- lead qfn footprint. the SP43204 is manufactured on sipat's cmos process, a patented variation of silicon-on-insulator (soi) technology on a sapphire substrate, offering the performance of gaas with the economy and integration of conventional cmos. product specification 50 ? rf digital attenuator 2-bit; 0, 6, 12, and 18 db states product description figure 2. functional schematic diagram SP43204 features ? harp?-enhanced cmos device ? fast switching speed: typical 26 ns ? high linearity: typical +61 dbm ip3 ? small - error ? best in class 2000 v hbm esd tolerance ? attenuation: 6, 12, and 18 db states ? parallel control ? cmos compatible ? packaged in a 12-lead 3x3x0.85 mm qfn figure 1. package type 12-lead 3x3x0.85 mm qfn package control logic interface rf output switched attenuator array 2 parallel control rf input t e l : +86-23 - 628 0 8 8 18 f ax: +86-23-6 2 80 5 284 ww w . s i patsa w . com / sawmkt@s i p at.com next generation sipat dsa is available in a 3x3 mm 12-
product specification SP43204 page 2 of 7 -0.10 0.00 0.10 0.20 0.30 0.40 0.50 0 500 1000 1500 2000 2500 3000 3500 4000 frequency (mhz.) attenuation error (db.) 6db state 12db state 18db state 0 6 12 18 0 6 12 18 attenuation state (db.) attenuation (db.) -1.00 -0.90 -0.80 -0.70 -0.60 -0.50 -0.40 -0.30 -0.20 -0.10 0.00 0 500 1000 1500 2000 2500 3000 3500 4000 frequency (mhz) insertion loss (db.) +25c -40c +85c table 1. electrical specifications @ +25c, v dd = 3.3 v performance plots parameter test conditions min typical max units frequency range 50 - 3000 mhz attenuation range 6 db,12 db and 18 db steps 0 -18 db insertion loss 0.6 0.7 db attenuation error 0 db - 18 db attenuation settings 50 mhz to < 2000 mhz 2000 mhz ? 3000 mhz +0.1 +0.2 -0.25 / + 0.40 -0.10 / +0.50 db db return loss 15 db relative phase all states 11 deg p1db input +28 +30 dbm iip3 iip3 two tones at +18 dbm, 20 mhz spacing +61 dbm switching speed 50% dc ctrl to 10% / 90% rf 26 ns figure 4. attenuation error vs. frequency @ t = +25c figure 3. attenuation vs. attenuation setting figure 5. insertion loss vs. temperature figure 6. input return loss vs attenuation @ t = +25c -40.00 -35.00 -30.00 -25.00 -20.00 -15.00 -10.00 -5.00 0.00 0 500 1000 1500 2000 2500 3000 3500 4000 frequency (mhz.) input return loss (db.) 0db 6db 12db 18db note: attenuation error equation - ae = [ abs {abs(insertion loss @ attenuation setting) - abs(reference loss) } ] - [ abs(attenuation setting) ] t e l : +86-23 - 628 0 8 8 18 f ax: +86-23-6 2 80 5 284 ww w . s i patsa w . com / sawmkt@s i p at.com
product specification SP43204 page 3 of 7 0.00 2.00 4.00 6.00 8.00 10.00 12.00 14.00 16.00 18.00 0 500 1000 1500 2000 2500 3000 3500 4000 frequency (mhz) phase (deg.) 0db 6db 12db 18db -80.00 -70.00 -60.00 -50.00 -40.00 -30.00 -20.00 -10.00 0.00 0 500 1000 1500 2000 2500 3000 3500 4000 frequency (mhz.) output return loss (db.) -40c +25c +85c -45.00 -40.00 -35.00 -30.00 -25.00 -20.00 -15.00 -10.00 -5.00 0.00 0 500 1000 1500 2000 2500 3000 3500 4000 frequency (mhz.) input return loss (db.) -40c +25c +85c 0 10 20 30 40 50 60 70 0 500 1000 1500 2000 2500 3000 3500 4000 4500 frequency (mhz.) iip3 (dbm. ) 0db 6db 12db 18db figure 7. output return loss vs attenuation @ t = +25c figure 8. input return loss vs temperature @ 12db state figure 10. relative phase* vs frequency @ t = +25c figure 11. input ip3 vs attenuation setting @ t = +25c -40.00 -35.00 -30.00 -25.00 -20.00 -15.00 -10.00 -5.00 0.00 0 500 1000 1500 2000 2500 3000 3500 4000 frequency (mhz.) output return loss (db.) 0db 6db 12db 18db figure 12. attenuation error vs. attenuation setting @ 3000 mhz -0.6 -0.4 -0.2 0 0.2 0.4 0.6 061218 attenuation setting(db.) attenuation error (db.) -40c +25c +85c *relative phase = phase (attenuation state) ? phase (insertion loss state) figure 9. output return loss vs temperature @ 12db state t e l : +86-23 - 628 0 8 8 18 f ax: +86-23-6 2 80 5 284 ww w . s i patsa w . com / sawmkt@s i p at.com
product specification SP43204 page 4 of 7 gnd rf1 nc 3 2 1 9 8 7 12 11 10 6 5 4 gnd rf2 nc nc nc nc v dd c1 c2 exposed ground paddle table 2. pin descriptions exposed solder pad connection the exposed solder pad on the bottom of the package must be grounded for proper device operation. figure 13. pin configuration (top view) pin no. pin name description 1 gnd ground 2 rf1 2 rf1 port 3 nc 1 no connect 4 nc 1 no connect 5 nc 1 no connect 6 nc 1 no connect 7 nc 1 no connect 8 rf2 2 rf2 port 9 gnd ground 10 c2 attenuation control bit, 12 db 11 c1 attenuation control bit, 6 db 12 v dd power supply pin electrostatic discharge (esd) precautions when handling this cmos device, observe the same precautions that you would use with other esd- sensitive devices. although this device contains circuitry to protect it from damage due to esd, precautions should be taken to avoid exceeding the specified rating. latch-up avoidance unlike conventional cmos devices, sipat's cmos devices are immune to latch-up. table 4. operating ranges table 5. absolute maximum ratings exceeding absolute maximum ratings may cause permanent damage. operation should be restricted to the limits in the operating ranges table. operation between operating range maximum and absolute maximum for extended periods may reduce reliability. parameter min typ max units v dd power supply voltage 3.0 3.3 3.6 v i dd power supply current 8 200 a digital input high 0.7xv dd 3.6 v digital input low 0 0.3xv dd v digital input leakage 10 a p in input power (50 ? ) 20 mhz 4.0 ghz +23 dbm t op operating temperature range -40 25 85 c symbol parameter/conditions min max units v dd power supply voltage -0.3 4.0 v v i voltage on any digital input -0.3 v dd + 0.3 v t st storage temperature range -65 150 c p in input power (50 ? ) 20 mhz 4.0 ghz +23 dbm v esd esd voltage (human body model, mil_std 883 method 3015.7) 2000 v table 3. attenuation word truth table c1 c2 attenuation setting rf1-rf2 l l reference i.l. h l 6 db l h 12 db h h 18 db notes: 1. pins 3 through 7 may be tied to ground if desired, but they are not connected to ground internal to the package 2. all rf pins must be dc blocked with an external series capacitor or held at 0 vdc. moisture sensitivity level the moisture sensitivity level rating for the SP43204 in the 12-lead 3x3 qfn package is msl1. switching frequency the SP43204 has a maximum 25 khz switching rate. switching rate is defined to be the speed at which the dsa can be toggled across attenuation states. t e l : +86-23 - 628 0 8 8 18 f ax: +86-23-6 2 80 5 284 ww w . s i patsa w . com / sawmkt@s i p at.com
product specification SP43204 page 5 of 7 g evaluation kit the 2-bit dsa ek board was designed to ease customer evaluation of sipat?s SP43204. for automated programming, connect the test harness provided with the evk to the parallel port of the pc and to the 6-pin header of the pcb. connect the loose wire of the supplied cable to a power supply set at 3.3v dc. set the sp3t switches s1 and s2 to the ?middle? toggle position. after downloading and installing the dsa evk software from www.psemi.com, run the software and select ?SP43204? from the drop down menu. using the software, enable or disable each setting to the desired attenuation state. the software automatically programs the dsa each time an attenuation state is enabled or disabled. for manual programming, disconnect the test harness provided with the evk. apply 3.3v to the vdd header pin and ground to the gnd header pin. the dut can be controlled two ways: 1. the mechanical switches in conjunction with the vctl pin can be used. apply desired control voltage to vctl header pin. the top mechanical switch controls the 6db stage, the bottom mechanical switch controls the 12db stage. for each switch, the left position is the 0v condition, while the right position is the vctrl condition. the middle position leaves the control pin floating. 2. the ctl1 and ctl2 pins on the header can be used. each pin directly controls the 6db and 12db stage respectively. the vctl pin on the header is left open. the mechanical switches may be left uninstalled or must be kept in the middle position. note: to minimize switching time, c3 and c4 can be removed. power-up control settings the SP43204 will always power up into the state determined by the voltages on the 2 control pins. the dsa can be preset to any state within the 18 db range by pre-setting the parallel control pins prior to power-up. there is a 10 s delay between the time the dsa is powered-up to the time the desired state is set. if the control pins are left floating during power-up, the device will default to the minimum attenuation setting (insertion loss state). figure 14. evaluation board layouts figure 15. evaluation board schematic sipat specification 102/0416 sipat specification 101/0344 z=50 ohm de-embeding trace z=50 ohm z=50 ohm center gnd pad 3 1 2 4 s1 ss14mdp2 1 2 j2 smasm 1 2 j5 smasm 1 2 j4 smasm 1 2 j3 sma sm 3 1 2 4 s2 ss14mdp2 1 1 3 3 5 5 2 2 4 4 6 6 j1 header 3x2 vdd c1 c2 nc nc nc rf2 rf2 rf1 rf1 nc nc 1 2 4 6 8 9 12 10 7 3 11 5 13 u1 SP43204 r1 0ohm r2 0ohm c1 0.1f c2 100pf c3 10pf c4 10pf vctl vctl ctl2 vdd ctl1 7 h o ) d [ z z z v l s d w v d z f r p v d z p n w # v l s d w f r p
product specification SP43204 page 6 of 7 qfn figure 16. package drawing qfn 3x3 mm a max 0.900 nom 0.850 min 0.800 note: pin 1 identification tab is electrically connected to the exposed ground paddle 3x3 mm 12-lead qfn, bom 19/0104 t e l : +86-23 - 628 0 8 8 18 f ax: +86-23-6 2 80 5 284 ww w . s i patsa w . com / sawmkt@s i p at.com
product specification SP43204 page 7 of 7 table 6. ordering information figure 18. marking specifications yyww = date code zzzzz = last five digits of lot number figure 17. tape and reel drawing order code part marking description package shipping method ek-43204-02 SP43204 -ek SP43204 ? 12qfn 3x3mm-ek evaluation kit 1 / box SP43204mliba 43204 SP43204 g - 12qfn 3x3mm-75a green 12-lead 3x3mm qfn cut tape or loose SP43204mliba-z 43204 SP43204 g ? 12qfn 3x3mm-3000c green 12-lead 3x3mm qfn 3000 units / t&r 43204 yyww zzzzz tape feed direction device orientation in tape top of device pin 1 t e l : +86-23 - 628 0 8 8 18 f ax: +86-23-6 2 80 5 284 ww w . s i patsa w . com / sawmkt@s i p at.com
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