electrical characteri zation of maamss0031 catv amplifier at +5 volts and reduced gain rev. v2 application note AN3012 ? north america tel: 800.366.2266 ? europe tel: +353.21.244.6400 ? india tel: +91.80.4155721 ? china tel: +86.21.2407.1588 1 visit www.macomtech.com for additional data sheets and product information. m/a-com technology solutions inc. and its affiliates reserve the right to make changes to the product(s) or inform ation contained herein without notice. functional schematic abstract the maamss0031 catv amplifier is a gaas mmic which exhibits low noise and high linearity. it is ideally suited for set top boxes, home gateways, and other broadband internet based appliances. this amplifier is a monolithic single stage design in a 75 ohm input/output impedance environment. it is designed to have a reduced number of external matching components. the maamss0031 can also be used for +8 volt operation as shown in the datasheet. rf in rf out pin 1 gnd gnd rf in rf out pin 1 gnd gnd introduction the purpose of this application note is to present the typical performance of the maamss0031 amplifier when it is operated at +5 volts. it is intended as an aid to engineers for the implementation of the maamss0031 in set top box applications at 5 volts. an enhanced return loss circuit similar to that shown on page 4 of the data sheet is used for the small signal measurements. parameter test conditions units min. typ. max. gain db ? 9.7 ? gain flatness db ? 0.5 ? noise figure db ? 2.7 ? input return loss db ? 8 ? output return loss db ? 9 ? output ip3 6 mhz spacing, -10 dbm output per tone dbm ? 29 ? composite triple beat, ctb 132 channels, +23 dbmv/channel at the output. dbc ? -75 ? composite second order, cso 132 channels, +23 dbmv/channel at the output. dbc ? -66 ? p1db dbm ? 18 ? i dd + 5 volts ma ? 100 ? electrical specifications: t a = 25c, freq: 50 - 1000 mhz, v dd = +5 volts, z 0 = 75 ohms
electrical characteri zation of maamss0031 catv amplifier at +5 volts and reduced gain rev. v2 application note AN3012 ? north america tel: 800.366.2266 ? europe tel: +353.21.244.6400 ? india tel: +91.80.4155721 ? china tel: +86.21.2407.1588 2 visit www.macomtech.com for additional data sheets and product information. m/a-com technology solutions inc. and its affiliates reserve the right to make changes to the product(s) or inform ation contained herein without notice. off-chip component values recommended board layout component value package c1 0.01 f 0402 c2 0.01 f 0402 c3 0.01 f 0402 c4 0.01 f 0402 c5 0.5 pf 0402 c6 1.0 pf 0402 l1 * 1000 nh 1210 l2 8.2 nh 0402 l3 5.6 nh 0402 r1 220 ? 0402 r2 15 ? 0402 * l1 supplied from epcos, part number b82422a1102k100. schematic including off-chip components rf out c1 l1 c3 c2 v dd pin 1 l2 c4 r1 rf in r2 c6 c5 l3 l1 c3 c2 c1 l2 r1 c4 c5 r2 c6 l3
electrical characteri zation of maamss0031 catv amplifier at +5 volts and reduced gain rev. v2 application note AN3012 ? north america tel: 800.366.2266 ? europe tel: +353.21.244.6400 ? india tel: +91.80.4155721 ? china tel: +86.21.2407.1588 3 visit www.macomtech.com for additional data sheets and product information. m/a-com technology solutions inc. and its affiliates reserve the right to make changes to the product(s) or inform ation contained herein without notice. gain vs. frequency to 3 ghz gain vs. frequency to 1 ghz typical performance curves - t a = 25c, v dd = +5 volts, z 0 = 75 ohms output return loss vs. frequency input return loss vs. frequency noise figure vs. frequency 0 2 4 6 8 10 12 0.0 0.2 0.4 0.6 0.8 1.0 frequency (ghz) -10 -5 0 5 10 15 0.00.51.01.52.02.53.0 frequency (ghz) -20 -15 -10 -5 0 0.0 0.2 0.4 0.6 0.8 1.0 frequency (ghz) -20 -15 -10 -5 0 0.0 0.2 0.4 0.6 0.8 1.0 frequency (ghz) 0 1 2 3 4 5 0.00.20.40.60.81.0 frequency (ghz)
electrical characteri zation of maamss0031 catv amplifier at +5 volts and reduced gain rev. v2 application note AN3012 ? north america tel: 800.366.2266 ? europe tel: +353.21.244.6400 ? india tel: +91.80.4155721 ? china tel: +86.21.2407.1588 4 visit www.macomtech.com for additional data sheets and product information. m/a-com technology solutions inc. and its affiliates reserve the right to make changes to the product(s) or inform ation contained herein without notice. sot-89 plastic package
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