tel: +86-23-62808818 fax: +86-23-62808382 www.sipatsaw.com / sales@sipat.com part number LBT70A74 rev. date 2011-05-13 sipat co., ltd. ( cetc no.26 research institute ) #14 nanping huayuan road, chongqing, china, 400060 ver. 1.0 page 1/3 c c h h i i n n a a e e l l e e c c t t r r o o n n i i c c s s t t e e c c h h n n o o l l o o g g y y g g r r o o u u p p c c o o r r p p o o r r a a t t i i o o n n n n o o . . 2 2 6 6 r r e e s s e e a a r r c c h h i i n n s s t t i i t t u u t t e e 70mhz saw filter 9mhz bandwidth s s i i p p a a t t c c o o . . , , l l t t d d . . w w w w w w . . s s i i p p a a t t s s a a w w . . c c o o m m part number: LBT70A74 features ? for if saw filter ? single-ended operation ? ceramic surface mount package ? small size ? rohs compliant (2002/95/ec), pb-free specifications parameter unit minimum typical maximum center frequency mhz 69.85 70 70.15 insertion loss db - 26.9 28 1.2 db bandwidth mhz - 9.25 - 3 db bandwidth mhz 9.4 9.47 - 35 db bandwidth mhz - 10.33 10.4 passband variation db - 1 1.2 absolute delay usec - 2.28 2.4 ultimate rejection db 35 37 - material temperature coefficient khz/c -1.3 substrate material - 112lt ambient temperature c 25 operating temperature range c -25 - +85 storage temperature range c -45 - +105 dc voltage v 0 input power dbm - - 10 esd class - 1a package size smd20*9.8 notes: 1. all specifications are based on the test circuit shown; 2. in production, all specifications are measured by ag ilent network analyzer and full 2 port calibration at room temperature; 3. electrical margin has been built into the design to account for the variations due to temperature drift and manufacturing tolerances; 4. this is the optimum impedance in order to achieve the performance show.
tel: +86-23-62808818 fax: +86-23-62808382 www.sipatsaw.com / sales@sipat.com part number LBT70A74 rev. date 2011-05-13 sipat co., ltd. ( cetc no.26 research institute ) #14 nanping huayuan road, chongqing, china, 400060 ver. 1.0 page 2/3 c c h h i i n n a a e e l l e e c c t t r r o o n n i i c c s s t t e e c c h h n n o o l l o o g g y y g g r r o o u u p p c c o o r r p p o o r r a a t t i i o o n n n n o o . . 2 2 6 6 r r e e s s e e a a r r c c h h i i n n s s t t i i t t u u t t e e 70mhz saw filter 9mhz bandwidth s s i i p p a a t t c c o o . . , , l l t t d d . . w w w w w w . . s s i i p p a a t t s s a a w w . . c c o o m m part number: LBT70A74 matching configuration l1=(180+22)nh l2=150nh c1=c2=33pf source/load impedance=50 ohm notes - component values may change depending on board layout. package dimension package: smd20*9.8 unit: mm pad configuration: input: 10 output: 5 ground: 1,2,3,4,6,7,8,9 marking configuration: 1) ?: pad number 1 index 2) sipat: manufacturer name 3) LBT70A74: part number 4) xxyy: date(year/month) 5) zz: identified code 2 14 35 9 10 7 86 1.66 0.21 2.30 1.905 1.02 9.80 0.20 20.00 0.20 2 1 5 4 3 9 10 7 86 0.62 sipat LBT70A74 xxyyzz input output 50 50 l1 c1 l2 c2 10 5
tel: +86-23-62808818 fax: +86-23-62808382 www.sipatsaw.com / sales@sipat.com part number LBT70A74 rev. date 2011-05-13 sipat co., ltd. ( cetc no.26 research institute ) #14 nanping huayuan road, chongqing, china, 400060 ver. 1.0 page 3/3 c c h h i i n n a a e e l l e e c c t t r r o o n n i i c c s s t t e e c c h h n n o o l l o o g g y y g g r r o o u u p p c c o o r r p p o o r r a a t t i i o o n n n n o o . . 2 2 6 6 r r e e s s e e a a r r c c h h i i n n s s t t i i t t u u t t e e 70mhz saw filter 9mhz bandwidth s s i i p p a a t t c c o o . . , , l l t t d d . . w w w w w w . . s s i i p p a a t t s s a a w w . . c c o o m m part number: LBT70A74 typical performance frequency response passband response 45 50 55 60 65 70 75 80 85 90 95 -116.8876 -106.8876 -96.8876 -86.8876 -76.8876 -66.8876 -56.8876 -46.8876 -36.8876 -26.8876 -16.8876 type performance frequency(mhz) magnitude(db) 60 62 64 66 68 70 72 74 76 78 80 -29.3876 -28.8876 -28.3876 -27.8876 -27.3876 -26.8876 -26.3876 -25.8876 -25.3876 type performance frequency(mhz) amplitude ripple(db) horizontal: 5mhz/div vertical: 10db/div horizontal: 2mhz/div vertical: 0.5db/div group delay variation(f04.5mhz) phase linearity(f04.5mhz) 60 62 64 66 68 70 72 74 76 78 80 1900 2000 2100 2200 2300 2400 2500 2600 x: 65.5 y: 2286 type performance frequency(mhz) group delay time(ns) x: 70 y: 2281 x: 74.5 y: 2263 60 62 64 66 68 70 72 74 76 78 80 -15 -10 -5 0 5 10 15 x: 70 y: -1.418 type performance frequency(mhz) degree(deg) x: 74.5 y: 1.832 x: 65.5 y: 1.532 horizontal: 2mhz/div vertical: 100ns/div horizontal: 2mhz/div vertical: 5deg/div smith chart s11 smith chart s22 0.2 0.5 1.0 2.0 5.0 +j0.2 -j0.2 +j0.5 -j0.5 +j1.0 -j1.0 +j2.0 -j2.0 +j5.0 -j5.0 0.0 0.2 0.5 1.0 2.0 5.0 +j0.2 -j0.2 +j0.5 -j0.5 +j1.0 -j1.0 +j2.0 -j2.0 +j5.0 -j5.0 0.0
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