voltage controlled attenuator .1 to 4 ghz schematic maximum ratings parameter maximum dc v oltage +17 v olts continuous rf input power +23 dbm operating case t emperature C55 to +125 c storage t emperature C62 to +150 c r series burn-in t emperature +125 c weight: (typical) 0.5 grams psf-030-25 pin configuration sm-25f features ? frequency range: 0.1 to 4 ghz, usable to 5 ghz ? 30 db attenuation range, 50 db at 500 mhz ? t emperature stable ? w ell matched throughout attenuation range ? surface mount package applications ? agc/alc loops ? am modulator ? non-reflective spst switch description the psf-030 is a thin film analog voltage controlled attenuator providing 30 to 50 db of range depending on frequency and flatness require- ments. it uses pin diodes in a modified pi configuration to maintain low vswr perfor - mance over the control range. the psf-030-25 comes in our smallest hermetic surface mount package and offers higher performance than the psf-030-45. rf out rf in + 15 v c t echnical data
2 electrical specifications (measured in 50 w system @ 15 vdc nominal unless otherwise noted) t ypical guaranteed specifications symbol characteristic t c = 25 c t c = 0 to 50 c t c = e55 to +85 c unit bw frequency range 100e5000 100e4000 100e4000 mhz ? attenuation, min. (vc = o v) 100e1000 mhz 45 40 30.0 db 1000e2000 mhz 40 35 25.0 db 2000e4000 mhz 30 25 20.0 db ? insertion loss, max (vc = +15v) 2.5 3.0 3.5 db ? vswr (w orst case in attenuation range) 1.7:1 2.0:1 2.0:1 ? ? flatness over frequency (to 25 db) 100e2000 mhz 0.5 1.0 1.0 db 2000e4000 mhz 1.0 1.5 1.5 db ? switching speed (10% to 90%) (on to off or off to on) .5 1 1 m s ? bias current 8.0 ? ? ma ? control v oltage 0 to +15 ? ? vdc ? control current 0 to 10 ? ? ma 030 series
3 030 series t op t race: control pulse, 0C10v bottom t race: detected rf (pos detection) switching speed t ypical performance over t emperature (@ 15 vdc unless otherwise noted) -60 -50 -40 -30 -20 -10 0 0 1 2 3 4 5 attenuation vs. frequency @ vc attenuation - db frequency - ghz vc=15 7.23 3.87 2.76 2.35 2.16 2.04 1.97 1.92 0 -40 -20 0 20 40 60 80 100 120 0 1 2 3 4 5 insertion phase vs. frequency @ vc insertion phase - db frequency - ghz vc=15 7.23 3.87 2.76 2.35 2.16 2.04 1.97 1.92 0 -30 -25 -20 -15 -10 -5 0 0.01 0.1 1 10 output return loss vs. frequency return loss - db frequency - ghz vc=15 7.23 3.87 2.76 2.35 2.16 2.04 1.97 1.92 0 -30 -25 -20 -15 -10 -5 0 0.01 0.1 1 10 input return loss vs. frequency 25 85 -55 e f g h j i k return loss - db frequency - ghz vc=15 7.23 3.87 2.76 2.35 2.16 2.04 1.97 1.92 0 -50 -40 -30 -20 -10 0 0 2 4 6 8 10 12 14 attenuation vs. control voltage (freq. = 1 ghz) attenuation - db control voltage - volts tc = +25 tc = -55c tc = +85
case drawings pkg # pin designa tion 1 2 3 4 sm-25 rf in gnd rf out +v sm-25f rf in v -cont rf out +v sm-25da rf in Cv vid out +v sm-25dd rf in ctl ttl out +v notes: 1. maximum temperature exposure is 260 c for 10 seconds. 2. dimensions in inches. 3. t olerances: x xx .01 xxx .005 0.015 0.001 4 pl 0.040 4 3 2 1 0.120 max 0.250 sq 0.008 0.001 0.025 typ 0.040 typ 0.055 typ 0.230 0.230 0.050 0.015 8 pl 0.030 3 pl c l + + 0.010 typ 0.040 4 pl 0.010 r0.010 4 pl contact teledyne microwave solutions: 650-691-9 800 650-962-6 845 fax check for updates: www.teled yne microwave.com
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