12 - 1 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com variable gain amplifiers - digital - smt 12 hmc681lp5 / 681lp5e v03.1010 functional diagram electrical specifcations, t a = +25 c, vdd = vs= p/s= +5v t he h m c681 lp 5( e ) is ideal for: ? if & rf a pplications ? cellular/3 g i nfrastructure ? wi b ro / wi ma x / 4 g ? m icrowave r adio & v sat ? t est e quipment and s ensors +13.5 d b to +45 d b g ain control in 0.5 d b s teps high output ip 3: +36 d b m 0.25 d b t ypical g ain s tep e rror s ingle +5v s upply 32 l ead 5x5mm smt p ackage: 25mm 2 t he h m c681 lp 5( e ) is a digitally controlled variable gain amplifer which operates from d c to 1 g hz, and can be programmed to provide anywhere from 13.5 d b , to 45 d b of gain, in 0.5 d b steps. t he h m c681 lp 5( e ) delivers noise fgure of 2.8 d b in its maximum gain state, with output ip 3 of up to +36 d b m in any state. t his serially controlled digital v ga incorporates off chip a c ground capacitors for near d c operation, making it suitable for a wide variety of rf and if applications. t he h m c681 lp 5( e ) is housed in a r oh s compliant 5x5 mm q fn leadless package, and provides the user with a highly integrated solution. t his functionality is also available with parallel control as the h m c626 lp 5( e ). p arameter m in. t yp. m ax. m in. t yp. m ax. units 50 - 350 350 - 1000 m hz g ain ( m aximum g ain s tate) 40 45 30 40 d b g ain control r ange 31.5 31.5 d b i nput r eturn l oss 25 30 d b output r eturn l oss 20 17 d b g ain s etting a ccuracy: ( r eferenced to m aximum g ain s tate) a ll g ain s tates (0.15 + 3% of r elative g ain s etting) m ax. (0.15 + 3% of r elative g ain s etting) m ax. d b output p ower for 1 d b compression 20 19 d b m output t hird order i ntercept p oint ( t wo- t one output p ower= 5 d b m e ach t one) 38 36 d b m n oise f igure 2.7 2.8 d b s witching characteristics t rise , t fall (10/90% rf ) to n , to ff (50% c tl to 10/90% rf ) 60 120 60 120 ns ns t otal s upply current 176 225 176 225 m a typical applications features general description 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz
12 - 2 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com v ariable gain amplifiers - digital - smt 12 relative gain setting (referenced to maximum gain state) (only major states are shown) gain vs. frequency input return loss (only major states are shown) output return loss (only major states are shown) hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz 0 5 10 15 20 25 30 35 40 45 50 0.05 0.1 0.15 0.2 0.25 0.3 0.35 +25c +85c -40c gain (db) frequency (ghz) -40 -35 -30 -25 -20 -15 -10 -5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 return loss (db) frequency (ghz) 31.5db 2db -40 -35 -30 -25 -20 -15 -10 -5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 return loss (db) frequency (ghz) 31.5db i.l -35 -30 -25 -20 -15 -10 -5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 relative gain (db) frequency (ghz) 31.5 db 16 db 8 db bit error vs. frequency (only major states are shown) bit error vs. relative gain setting -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 0 4 8 12 16 20 24 28 32 bit error (db) relative gain setiting (db) 350mhz 150, 200mhz -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 0.05 0.1 0.15 0.2 0.25 0.3 0.35 bit error (db) frequency (ghz) 0.5db 16db 31.5db 50 to 350 mhz tuning
12 - 3 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com variable gain amplifiers - digital - smt 12 step error vs. frequency (only major states are shown) relative phase vs. frequency (only major states are shown) hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 0.05 0.1 0.15 0.2 0.25 0.3 0.35 step error (db) frequency (ghz) 16 db 1 db -40 -20 0 20 40 60 0.05 0.1 0.15 0.2 0.25 0.3 0.35 relative phase (deg) frequency (ghz) 31.5 db 16 db 0.5 - 16 db 31.5 db 8 db output p1db (major states shown are il through 16 db)) output ip3 @ 5 dbm output power per tone (major states shown are il through 16 db) 35 37 39 41 43 45 0.05 0.1 0.15 0.2 0.25 0.3 0.35 ip3 (dbm) frequency (ghz) 16 db i.l. 16 18 20 22 24 0.05 0.1 0.15 0.2 0.25 0.3 0.35 p1db (dbm) frequency (ghz) i.l. 16 db 50 to 350 mhz tuning
12 - 4 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com v ariable gain amplifiers - digital - smt 12 relative gain setting (referenced to maximum gain state) (only major states are shown) gain vs. frequency input return loss (only major states are shown) output return loss (only major states are shown) 0 5 10 15 20 25 30 35 40 45 50 0.2 0.4 0.6 0.8 1 +25 c +85 c -40 c gain (db) frequency (ghz) -50 -40 -30 -20 -10 0 0.2 0.4 0.6 0.8 1 return loss (db) frequency (ghz) 31.5 db i.l -40 -35 -30 -25 -20 -15 -10 -5 0 0.2 0.4 0.6 0.8 1 return loss (db) frequency (ghz) 31.5 db i.l -35 -30 -25 -20 -15 -10 -5 0 0.2 0.4 0.6 0.8 1 relative gain (db) frequency (ghz) 31.5 db 16 db 8 db bit error vs. frequency (only major states are shown) bit error vs. relative gain setting -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 0 4 8 12 16 20 24 28 32 bit error (db) relative gain setting (db) 350 mhz 1000 mhz -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 0.2 0.4 0.6 0.8 1 bit error (db) frequency (ghz) 31.5 db 16 db 8 db hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz 350 to 1000 mhz tuning
12 - 5 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com variable gain amplifiers - digital - smt 12 step error vs. frequency (only major states are shown) relative phase vs. frequency (only major states are shown) -1 -0.8 -0.6 -0.4 -0.2 0 0.2 0.4 0.6 0.8 1 0.2 0.4 0.6 0.8 1 step error (db) frequency (ghz) 4, 8 db 32 db 16 db -40 -20 0 20 40 60 0.2 0.4 0.6 0.8 1 relative phase (deg) frequency (ghz) 31.5 db 16 db 8 db 0.5 - 4 db pup truth table le pu p 1 pu p 2 r elative g ain s etting 0 0 0 -31.5 0 1 0 -24 0 0 1 -16 0 1 1 i nsertion l oss hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz output p1db (major states shown are il through 16 db) output ip3 @ 5 dbm output power per tone (major states shown are il through 16 db) 10 20 30 40 50 0.2 0.4 0.6 0.8 1 ip3 (dbm) frequency (ghz) 16 db i.l. 16 18 20 22 24 0.2 0.4 0.6 0.8 1 p1db (dbm) frequency (ghz) 16 db i.l. 350 to 1000 mhz tuning power-up states i f le is set to logic l ow at power-up, the logic state of p u p 1 and p u p 2 determines the power-up state of the part per p u p truth table. t he attenuator latches in the desired power-up state approximately 200 ms after power-up. power-on sequence t he ideal power-up sequence is: gnd , vdd, digital inputs, rf inputs. t he relative order of the digital inputs are not important as long as they are powered after vdd / gnd
12 - 6 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com v ariable gain amplifiers - digital - smt 12 serial control interface t he h m c681 lp 5( e ) contains a 3-wire spi compatible digital interface ( serin , c l k, le ). i t is activated when p / s is kept high. t he 6-bit serial word must be loaded msb frst. t he positive-edge sensitive c l k and le requires clean transitions . i f mechanical switches were used, sufficient debouncing should be provided. when le is high, 6-bit data in the serial input register is transferred to the attenuator. when le is high c l k is masked to prevent data transition during output loading. f or all modes of operations, gain will remain constant while le is kept low. s erial word r elative g ain s etting b 5 16 d b b 4 8d b b 3 4 d b b 2 2 d b b 1 1 d b b 0 0.5 d b high high high high high high r eference 0 d b high high high high high l ow -0.5 d b high high high high l ow high -1 d b high high high l ow high high -2 d b high high l ow high high high -4 d b high l ow high high high high -8 d b l ow high high high high high -16 d b l ow l ow l ow l ow l ow l ow -31.5 d b a ny combination of the above states will provide a relative gain setting approximately equal to the sum of the bits selected. truth table hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz p arameter t yp. m in. serial period, t s ck 100 ns control set-up time, t c s 20 ns control hold-time, t ch 20 ns le setup-time, t ln 10 ns m in. le pulse width, t le w 10 ns m in le pulse spacing, t les 630 ns s erial clock hold-time from le , t ck n 10 ns hold t ime, t p h. 0 ns l atch e nable m inimum width, t len 10 ns s etup t ime, t ps 2 ns
12 - 7 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com variable gain amplifiers - digital - smt 12 outline drawing n o tes : 1. leadframe material : co pper all oy 2. dimensi o ns are in in ch es [ millimeters ] 3. lead spa c ing to leran c e is n o n -cu m u lati v e . 4. pad b u rr lengt h s h all be 0.15mm ma x im u m . pad b u rr h eig h t s h all be 0.05mm ma x im u m . 5. pa ck age w arp s h all n ot e xc eed 0.05mm. 6. all gr ou nd leads and gr ou nd paddle m u st be s o ldered to p c b rf gr ou nd . 7. refer to h ittite appli c ati o n n o te f o r s u ggested land pattern . p art n umber p ackage b ody m aterial l ead f inish msl r ating p ackage m arking [3] h m c681 lp 5 l ow s tress i njection m olded p lastic s n/ p b s older msl 1 [1] h681 xxxx h m c681 lp 5 e r oh s -compliant l ow s tress i njection m olded p lastic 100% matte s n msl 1 [2] h681 xxxx [1] m ax peak refow temperature of 235 c [2] m ax peak refow temperature of 260 c [3] 4- d igit lot number xxxx package information absolute maximum ratings ele c tr o stati c sensiti v e de v ic e o bser v e h andling pre c a u ti o ns bias voltage vdd (v) i dd ( t yp.) (m a ) +5 5 vs (v) i s 1 (m a ) i s 2 (m a ) +5 88 88 hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz rf i nput p ower [1] ( a t m ax g ain s etting) -10.5 d b m ( t = +85 c) d igital i nputs ( r eset , s hift clock, l atch e nable & s erial i nput) -0.5 to vdd +0.5v b ias voltage (vdd) 5.5v collector b ias voltage (vcc) 5.5v channel/junction t emperature 150 c continuous p diss ( t = 85 c) (derate 19.8 mw/ c above 85 c) [1] 1.29 w t hermal r esistance 50.8 c/w s torage t emperature -65 to +150 c operating t emperature -40 to +85 c [1] t he m ax rf i nput p ower r ating will increase by 0.5 d b for every 0.5 d b reduction in gain to a maximum rf i nput p ower of 10 d b m. control voltage table s tate vdd = +3v vdd = +5v l ow 0 to 0.5v @ <1 a 0 to 0.8v @ <1 a high 2 to 3v @ <1 a 2 to 5v @ <1 a
12 - 8 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com v ariable gain amplifiers - digital - smt 12 pin descriptions p in n umber f unction d escription i nterface s chematic 1, 5, 9, 14, 16, 23, 28 n /c t he pins are not connected internally; however, all data shown herein was measured with these pins connected to rf / d c ground externally. 2, 20 rf in1, rf in2 t his pin is d c coupled. a n off chip d c blocking capacitor is required. 4, 22 rf out1, rf out2 rf output and d c bias (vcc) for the output stage of the amplifers. a mplifer bias provided via external bias tee as shown in application circuit. 3, 7, 18, 21 gnd t hese pins and package bottom must be connected to rf / d c ground. 6, 19 att in, att out t hese pins are d c coupled and matched to 50 ohms. b locking capacitors are required. s elect value based on lowest frequency of operation. 8, 10, 11, 12, 13, 15, 17 a c g 1, a c g 2, a c g 3, a c g 4, a c g 5, a c g 6, a c g 7 e xternal capacitors to ground is required. s elect value for lowest frequency of operation. p lace capacitor as close to pins as possible. 24 ser ou t s erial input data delayed by 6 clock cycles. 25, 26 pu p 2, pu p 1 r efer to truth tables and serial control interface diagram. 30 c l k 31 serin 32 le 29 p / s a pply +5v for normal operation. 27 vdd s upply voltage hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz
12 - 9 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com variable gain amplifiers - digital - smt 12 application circuit hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz t uned f requency 50 - 350 m hz 350 - 1000 m hz e valuation p c b 119171 123115 c1, c2, c9, c10 3300 p f 100 p f c6 - c8 330 p f 100 p f l 1, l 2 560 nh 270 nh components for selected frequencies
12 - 10 for price, delivery and to place orders: hittite microwave corporation, 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com application support: phone: 978-250-3343 or apps@hittite.com v ariable gain amplifiers - digital - smt 12 evaluation pcb t he circuit board used in the application should use rf circuit design techniques. s ignal lines should have 50 ohm impedance while the package ground leads and exposed paddle should be connected directly to the ground plane similar to that shown. a sufficient number of via holes should be used to connect the top and bottom ground planes. t he evaluation circuit board shown is available from hittite upon request. r efer to components for s elected f requencies table for part number. list of materials for evaluation pcb [1] i tem d escription j1 - j2 p c b m ount sma connector j3 18 p in d c connector j4 - j7, j9 d c p in c1, c2, c9, c10 capacitor, 0402 p kg. [1] c3 - c5 100 p f capacitor, 0402 p kg. c6 - c8 capacitor, 0402 p kg. [1] c11 - c13 1000 p f capacitor, 0402 p kg. c14, c15 2.2 f capacitor, c ase a p kg. r 1, r 2 1.8 ohm r esistor, 0603 p kg. l 1, l 2 i nductor, 0603 p kg. [1] u1 h m c681 lp 5( e ) variable g ain a mplifer p c b [2] 119169 e valuation p c b [1] p lease reference components for s elected f requencies table. [2] circuit b oard m aterial: a rlon 25 fr hmc681lp5 / 681lp5e v03.1010 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz
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