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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 hmc708lp5 / 708lp5e v03.0409 functional diagram typical applications features general description 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz t he h m c708 lp 5( e ) is ideal for: ? cellular i nfrastructure ? wi b ro, wi ma x and lte / 4 g ? m icrowave r adio & v sat ? t est e quipment and s ensors -2.5 to +29 d b g ain control in 0.5 d b s teps p ower-up s tate s election high output ip 3: +37 d b m l ow n oise f igure: 1 d b ttl /c m o s compatible s erial, p arallel, or l atched p arallel control 0.25 d b t ypical s tep e rror s ingle +3v and +5v s upply 32 l ead 5x5mm smt p ackage: 25mm 2 t he h m c708 lp 5( e ) is a digitally controlled variable gain amplifer which operates from 1700 m hz and 2200 g hz, and can be programmed to provide between 2.5 d b attenuation and +29 d b of gain, in 0.5 d b steps. t he h m c708 lp 5( e ) delivers noise fgure of 1 d b in its maximum gain state, with output ip 3 of up to +37 d b m. t he dual mode gain control interface accepts either three wire serial input or 6 bit parallel word. t he h m c708 lp 5( e ) also features a user selectable power up state and a serial output for cascading other hittite serially controlled components. f or 900 m hz applications please refer to the h m c707 lp 5( e ) data sheet. electrical specifcations, t a = +25 c rbias = 270 ohms for vdd = +5v, rbias = 10 kohms for vdd = +3v, vdd = vdd1 = vdd2 = vdd3 p arameter m in. t yp. m ax. m in. t yp. m ax. units vdd = +3v vdd = +5v f requency r ange 1.7 - 2.2 1.7 - 2.2 g hz g ain ( m aximum g ain s tate) 23 27 25 30 d b g ain control r ange 31.5 31.5 d b i nput r eturn l oss 16.5 20.5 d b output r eturn l oss 10.5 13.5 d b a ttenuation a ccuracy: ( r eferenced to m aximum g ain s tate) (0.3 + 8%) of a ttenuation s etting (0.2 + 5%) of a ttenuation s etting d b output p ower for 1 d b compression 13 16 18 21.5 d b m output t hird order i ntercept p oint ( t wo- t one i nput p ower= -10 d b m e ach t one) 32.5 37.5 d b m n oise f igure 1.1 1 d b s witching characteristics t rise , t fall (50% c tl to 90% rf ) t rise t fall - - 140 270 ns ns current a mplifer 1 30 47 65 80 97 135 m a current a mplifer 2 130 155 190 130 155 190 m a [1] t wo-tone output power @ -10 d b m [2] t wo-tone output power @ -5 d b m
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 hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz 20 24 28 32 36 40 1.5 1.7 1.9 2.1 2.3 2.5 +25c +85c -40c frequency (ghz) gain (db) vdd=5v vdd=3v -40 -30 -20 -10 0 1.5 1.7 1.9 2.1 2.3 2.5 vdd=3v vdd=5v frequency (ghz) return loss (db) 24 28 32 36 40 44 48 1.7 1.8 1.9 2 2.1 2.2 pout=-15dbm pout=-10dbm pout= -5dbm pout= 0dbm frequency (ghz) ip3 (dbm) vdd=5v vdd=3v -20 -15 -10 -5 0 1.5 1.7 1.9 2.1 2.3 2.5 vdd=3v vdd=5v frequency (ghz) return loss (db) -35 -30 -25 -20 -15 -10 -5 0 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 vdd=3v vdd=5v frequency (ghz) normalized attenuation (db) output ip3 vs. tone power [1] normalized attenuation (only major states are shown) maximum gain vs. frequency [1] input return loss (only major states are shown) output ip3 vs. attenuation @ 1900 mhz output return loss (only major states are shown) 0 10 20 30 40 0 4 8 12 16 20 24 28 32 vdd=3v vdd=5v attenuation state (db) ip3 (dbm) power out = -10dbm [1] m aximum gain state with digital attenuator set to minimum attenuation
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 -30 -20 -10 0 10 20 30 1.5 1.7 1.9 2.1 2.3 2.5 vdd=3v vdd=5v frequency (ghz) relative phase (deg) hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz normal relative phase vs. frequency (only major states are shown) bit error vs. frequency @ +3v (only major states are shown) bit error vs. frequency @ +5v (only major states are shown) bit error vs. attenuation state @ +3v bit error vs. attenuation state @ +5v -3 -2 -1 0 1 2 3 1.5 1.7 1.9 2.1 2.3 2.5 frequency (ghz) bit error (db) vdd = 3v -3 -2 -1 0 1 2 3 1.5 1.7 1.9 2.1 2.3 2.5 frequency (ghz) bit error (db) vdd = 5v -0.5 0 0.5 1 1.5 2 2.5 0 4 8 12 16 20 24 28 32 attenuation state (db) bit error (db) vdd=3v (1.7, 1.8, 1.9, 2.0, 2.1, 2.2) ghz -0.5 0 0.5 1 1.5 2 2.5 0 4 8 12 16 20 24 28 32 attenuation state (db) bit error (db) vdd=5v (1.7, 1.8, 1.9, 2.0, 2.1, 2.2) ghz
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 0 4 8 12 16 20 0 4 8 12 16 20 24 28 32 vdd=3v vdd=5v attenuation (dbm) noise figure (db) 0 0.4 0.8 1.2 1.6 2 1.5 1.7 1.9 2.1 2.3 2.5 vdd=3v vdd=5v frequency (ghz) noise figure (db) hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz noise figure vs. frequency noise figure vs. attenuation @ 1900 mhz step error vs. frequency @ +3v (only major states are shown) step error vs. frequency @ +5v (only major states are shown) -2 -1 0 1 2 1.5 1.7 1.9 2.1 2.3 2.5 frequency (ghz) step error (db) vdd = 3v -2 -1 0 1 2 1.5 1.7 1.9 2.1 2.3 2.5 frequency (ghz) step error (db) vdd = 5v 5 15 25 35 45 100 200 300 400 500 1 10 100 1000 10000 vdd=3v vdd=5v ip3 (dbm) dc current (ma) rbias (ohms) 28 32 36 40 44 100 150 200 250 300 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 ip3 @1.9ghz idd ip3 (dbm) idd (ma) voltage supply (v) output ip3 & supply current vs. rbias @ 1900 mhz output ip3 & supply current vs. supply voltage @ 1900 mhz
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 hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz -30 -20 -10 0 10 20 30 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 vdd=3v vdd=5v frequency (ghz) response (db) s11 s21 s22 0 0.4 0.8 1.2 1.6 2 1.5 1.7 1.9 2.1 2.3 2.5 vdd=3v vdd=5v frequency (ghz) noise figure (db) -20 -10 0 10 20 30 0 4 8 12 16 20 24 28 32 vdd=3v vdd=5v attenuation state (db) ip3 (dbm) power out = -20dbm [1] s ee a pplication circuit [2] m aximum gain state with digital attenuator set to minimum attenuation gain & return loss [1] [2] output ip3 vs. attenuation @ 1900 mhz [1] noise figure vs. frequency [1] [2] option 1 [1] : amp1 + 6-bit dat only
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 hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz 20 24 28 32 36 40 44 0 4 8 12 16 20 24 28 32 vdd=3v vdd=5v attenuation state (db) ip3 (dbm) pout=-5dbm pout=0dbm setup limit gain & return loss [1] [2] output ip3 vs. attenuation @ 1900 mhz [1] -20 -15 -10 -5 0 5 10 15 20 1.5 1.6 1.7 1.8 1.9 2 2.1 2.2 2.3 2.4 2.5 vdd=3v vdd=5v frequency (ghz) response (db) s22 s21 s11 t he h m c708 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. s tandard logic families work well. 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. when p / s is low, 3-wire spi interface inputs ( serin , c l k, le ) are disabled and serial input register is loaded asynchronously with parallel digital inputs ( d 0- d 5). when le is high, 6-bit parallel data is transferred to the attenuator. f or all modes of operations, attenuation state will stay constant while le is kept low. [1] s ee a pplication circuit [2] m aximum gain state with digital attenuator set to minimum attenuation option 2 [1] : 6-bit dat + amp2 only
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 hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz pup truth table 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 truth table parallel mode (direct parallel mode & latched parallel mode) note: t he parallel mode is enabled when p / s is set to low. direct parallel mode - t he attenuation state is changed by the control voltage i nputs directly. t he le ( l atch e nable) must be at a logic high to control the attenuator in this manner. latched parallel mode - t he attenuation state is selected using the control voltage i nputs and set while the le is in the l ow state. t he attenuator will not change state while le is l ow. once all control voltage i nputs are at the desired states the le is pulsed. s ee timing diagram above for reference. timing diagram (latched parallel mode) power-up states le pu p 1 pu p 2 g ain r elative to m aximum g ain 0 0 0 -31.5 0 1 0 -24 0 0 1 -16 0 1 1 i nsertion l oss 1 x x 0 to -31.5 d b n ote: t he logic state of d 0 - d 5 determines the power-up state per truth table shown below when le is high at power-up. control voltage i nput g ain r elative to m aximum g ain d 5 d 4 d 3 d 2 d 1 d 0 high high high high high high 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 reduction in gain approximately equal to the sum of the bits selected. 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. i f the le is set to logic h ig h at power-up, the logic state of d 0- d 5 determines the power-up state of the part per truth table. t he d v ga 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 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 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 absolute bias resistor range & recommended bias resistor values for idd vdd r bias t otal i dd (m a ) m in. m ax. r ecommended 3v 1k [1] open circuit 2.2k 195 4.7k 201 10k 206 5v 0 open circuit 0 231 120 243 270 252 [1] operation with vdd= 3v and r bias < 1k ohm may result in the part becoming conditionally stable which is not recommended. typical supply current vs. vdd (rbias = 270 for vdd= 5v, rbias= 10k for vdd= 3v) vdd (v) t otal idd (ma) 2.7 191 3.0 206 3.3 220 4.5 230 5.0 252 5.5 271 note: amplifer will operate over full voltage ranges shown above. d rain b ias voltage (vdd) 5.5 v rf input p ower ( rfin) (vdd = +5 vdc) -5 dbm + a ttenuation s tate (do not exceed +10 d bm) channel t emperature 150 c d igital inputs (r eset, s hift clock, latch e nable, s erial input) -0.5 to vdd +0.5v continuous pdiss (t= 85 c) (derate 28 mw/c above 85 c) 1.8 w t hermal r esistance (channel to ground paddle) 36.2 c/w s torage t emperature -65 to +150 c operating t emperature -40 to +85 c hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz
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 pin descriptions p in n umber f unction d escription i nterface s chematic 1 rfin rf input to the frst amplifer ( amp 1) t his pin is d c coupled and matched to 50 ohms. 2, 3, 21, 30 n /c n o connection necessary. t hese pins may be connected to rf / d c ground without affecting performance. 4 res t his pin is used to set the d c current of the frst amplifer by selection of external bias resistor. s ee application circuit. hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz 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 c708 lp 5 l ow s tress i njection m olded p lastic s n/ p b s older msl 1 [1] h708 xxxx h m c708 lp 5 e r oh s -compliant l ow s tress i njection m olded p lastic 100% matte s n msl 1 [2] h708 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
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 p in n umber f unction d escription i nterface s chematic 5 ser ou t s erial input data delayed by 6 clock cycles. 6, 7 9 - 14 pu p 1, pu p 2 d 0 - d 5 s ee truth table, control voltage table and timing diagram. 8 vdd1 s upply voltage 15 p / s s ee truth table, control voltage table and timing diagram. 16 c l k 17 serin 18 le 19, 23, 25, 26, 28 gnd t hese pins and package bottom must be connected to rf / d c ground. 20 rf ou t rf output and d c bias for the second amplifer ( amp 2). s ee a pplication circuit for off-chip components. 22 rfin 3 rf input for the second amplifer ( amp 2). t his pin is d c coupled. a n off-chip d c blocking capacitor is required. 27 rfin 2 i nput and output of the 6-bit digital attenuator (6- b it dat ). 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. 24 rf ou t 2 29 rf ou t 1 rf output for the frst amplifer ( amp 1) t his pin is matched to 50 ohms. 31, 32 vdd2, vdd3 p ower s upply voltage for the frst amplifer. e xternal bypass capacitors are required. s ee application circuit. pin descriptions (continued) hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz
12 - 11 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 hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz 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 hit - tite upon request. list of materials for evaluation pcb 120493 [1] i tem d escription j1 - j4 p c b m ount sma connector j5 2mm vertical m olex 28pos connector c1, c8, c10, c12, c18 220 p f capacitor, 0402 p kg. c3 10 n f capacitor, 0402 p kg. c6, c13, c15 1000 p f capacitor, 0603 p kg. c7, c14 10 n f capacitor, 0603 p kg. c16 27 p f capacitor, 0603 p kg. c17 4.7 u f capacitor, 0805 p kg. l 2 15 nh i nductor, 0402 p kg. l 3 6.8 nh i nductor, 0603 p kg. l 4 47 nh i nductor, 0603 p kg. l 5 5.1 nh i nductor, 0402 r 1 ( r bias) 270 ohm r esistor, 0402 p kg. r 2 - r 10 39k ohm r esistor, 0402 p kg. i tem d escription r 12, r 13 0 ohm r esistor, 0402 p kg. u1 h m c708 lp 5( e ) variable g ain a mplifer p c b [2] 120491 e valuation p c b [1] r eference this number when ordering complete evaluation p c b [2] circuit b oard m aterial: a rlon 25 fr or r oger 4350
12 - 12 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 hmc708lp5 / 708lp5e v03.0409 0.5 db lsb 6-bit digital variable gain amplifier, 1700 - 2200 mhz application circuit n ote 1: f or option 1 ( a mp1 + 6-bit dat only) remove l 4. m ove 220p f capacitor (0402 p kg.) from location c10 to c11. n ote 2: f or option 2 (6- b it dat + a mp2 only) remove r 13, l 2, l 3 and l 5. m ove 220p f capacitor (0402 p kg.) from location c8 to c9.

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