8 - 64 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 hmc681lp5 / 681lp5e v00.0508 functional diagram electrical specifi cations, t a = +25 c, vdd = vs= p/s= +5v the hmc681lp5(e) is ideal for: ? if & rf applications ? cellular/3g infrastructure ? wibro / wimax / 4g ? microwave radio & vsat ? test equipment and sensors +13.5 db to +45 db gain control in 0.5 db steps high output ip3: +36 dbm 0.25 db typical gain step error single +5v supply 32 lead 5x5mm smt package: 25mm 2 the hmc681lp5(e) is a digitally controlled variable gain amplifi er which operates from dc to 1 ghz, and can be programmed to provide anywhere from 13.5 db, to 45 db of gain, in 0.5 db steps. the hmc681lp5(e) delivers noise fi gure of 2.8 db in its maximum gain state, with output ip3 of up to +36 dbm in any state. this serially controlled digital vga incorporates off chip ac ground capacitors for near dc operation, making it suitable for a wide variety of rf and if applications. the hmc681lp5(e) is housed in a rohs compliant 5x5 mm qfn leadless package, and provides the user with a highly integrated solution. this functionality is also available with parallel control as the hmc626lp5(e). parameter min. typ. max. min. typ. max. units 50 - 350 350 - 1000 mhz gain (maximum gain state) 40 45 30 40 db gain control range 31.5 31.5 db input return loss 25 30 db output return loss 20 17 db gain setting accuracy: (referenced to maximum gain state) all gain states (0.15 + 3% of relative gain setting) max. (0.15 + 3% of relative gain setting) max. db output power for 1 db compression 20 19 dbm output third order intercept point (two-tone output power= 5 dbm each tone) 38 36 dbm noise figure 2.7 2.8 db switching characteristics trise, tfall (10/90% rf) ton, toff (50% ctl to 10/90% rf) 60 120 60 120 ns ns total supply current 176 225 176 225 ma typical applications features general description 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz
8 - 65 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 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 v00.0508 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
8 - 66 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 step error vs. frequency (only major states are shown) relative phase vs. frequency (only major states are shown) hmc681lp5 / 681lp5e v00.0508 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
8 - 67 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 releative 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 v00.0508 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz 350 to 1000 mhz tuning
8 - 68 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 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 pup1 pup2 relative gain setting 000 -31.5 010 -24 001 -16 011 insertion loss power-up states the power-up (pup) state is active at power-up provided that le is held low. the pup state is locked out after the fi rst le pulse or until vdd drops below 4.5v. power-up sequence the ideal power-up sequence is: gnd, vdd, digital inputs, rf inputs. the relative order of the digital inputs are not important as long as they are powered after vdd & gnd hmc681lp5 / 681lp5e v00.0508 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
8 - 69 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 serial control interface the hmc681lp5(e) contains a 3-wire spi compatible digital interface (serin, clk, le). it is activated when p/s is kept high. the 6-bit serial word must be loaded msb fi rst. the positive-edge sensitive clk and le requires clean transitions. if 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 clk is masked to prevent data transition during output loading. for all modes of operations, gain will remain constant while le is kept low. parameter typ. min. serial period, t sck 100 ns control set-up time, t cs 20 ns control hold-time, t ch 20 ns le setup-time, t ln 10 ns min. le pulse width, t lew 10 ns min le pulse spacing, t les 630 ns serial clock hold-time from le, t ckn 10 ns serial word releative gain setting b5 16 db b4 8db b3 4 db b2 2 db b1 1 db b0 0.5 db high high high high high high reference 0 db high high high high high low -0.5 db high high high high low high -1 db high high high low high high -2 db high high low high high high -4 db high low high high high high -8 db low high high high high high -16 db low low low low low low -31.5 db any combination of the above states will provide a relative gain setting approximately equal to the sum of the bits selected. truth table hmc681lp5 / 681lp5e v00.0508 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz
8 - 70 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 outline drawing notes: 1. leadframe material: copper alloy 2. dimensions are in inches [millimeters] 3. lead spacing tolerance is non-cumulative. 4. pad burr length shall be 0.15mm maximum. pad burr height shall be 0.05mm maximum. 5. package warp shall not exceed 0.05mm. 6. all ground leads and ground paddle must be soldered to pcb rf ground. 7. refer to hittite application note for suggested land pattern. part number package body material lead finish msl rating package marking [3] hmc681lp5 low stress injection molded plastic sn/pb solder msl1 [1] h681 xxxx HMC681LP5E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] h681 xxxx [1] max peak refl ow temperature of 235 c [2] max peak refl ow temperature of 260 c [3] 4-digit lot number xxxx package information absolute maximum ratings electrostatic sensitive device observe handling precautions bias voltage vdd (v) idd (typ.) (ma) +5.0 5 vs (v) is 1 (ma) is 2 (ma) +5.0 88 88 hmc681lp5 / 681lp5e v00.0508 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz rf input power [1] (at max gain setting) -10.5 dbm (t = +85 c) bias voltage (vdd) +5.5 vdc collector bias voltage (vcc) 5.5 vdc channel/junction temperature 150 c continuous pdiss (t = 85 c) (derate 19.8 mw/c above 85 c) [1] 1.29 w thermal resistance 50.8 c/w storage temperature -65 to +150 c operating temperature -40 to +85 c [1] the max rf input power rating will increase by 0.5 db for every 0.5 db reduction in gain to a maximum rf input power of 10 dbm.
8 - 71 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 pin descriptions pin number function description interface schematic 1, 5, 9, 14, 16, 23, 28 n/c these pins may be connected to rf/dc ground. performance will not be affected. 2, 20 rfin1,rfin2 this pin is dc coupled. an off chip dc blocking capacitor is required. 4, 22 rfout1, rfout2 rf output and dc bias (vcc) for the output stage of the amplifi ers. amplifi er bias provided via external bias tee as shown in application circuit. 3, 7, 18, 21 gnd these pins and package bottom must be connected to rf/dc ground. 6, 19 at tin, at tout these pins are dc coupled and matched to 50 ohms. blocking capacitors are required. select value based on lowest frequency of operation. 8, 10, 11, 12, 13, 15, 17 acg1, acg2, acg3, acg4, acg5, acg6, acg7 external capacitors to ground is required. select value for lowest frequency of operation. place capacitor as close to pins as possible. 24 serout serial input data delayed by 6 clock cycles. 25, 26 pup2, pup1 refer to truth tables and serial control interface diagram. 30 clk 31 serin 32 le 29 p/s apply +5v for normal operation. 27 vdd supply voltage hmc681lp5 / 681lp5e v00.0508 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz
8 - 72 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 application circuit hmc681lp5 / 681lp5e v00.0508 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz tuned frequency 50 - 350 mhz 350 - 1000 mhz evaluation pcb 119171 123115 c1, c2, c9, c10 3300 pf 100 pf c6 - c8 330 pf 100 pf l1, l2 560 nh 270 nh components for selected frequencies
8 - 73 for price, delivery, and to place orders, please contact hittite microwave corporation: 20 alpha road, chelmsford, ma 01824 phone: 978-250-3343 fax: 978-250-3373 order on-line at www.hittite.com variable gain amplifiers - smt 8 evaluation pcb the circuit board used in the fi nal application should use rf circuit design techniques. signal lines should have 50 ohm impedance while the package ground leads and exposed paddle should be con- nected 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. the evaluation circuit board shown is available from hittite upon request. refer to components for selected frequencies table for part number. list of materials for evaluation pcb [1] item description j1 - j2 pcb mount sma connector j3 12 pin dc connector j4 - j5 dc pin c1, c2, c9, c10 capacitor, 0402 pkg. [1] c3 - c5 100 pf capacitor, 0402 pkg. c6 - c8 capacitor, 0402 pkg. [1] c11 - c13 1000 pf capacitor, 0402 pkg. c14, c15 2.2 f capacitor, case a pkg. r1, r2 1.8 ohm resistor, 0603 pkg. l1, l2 inductor, 0603 pkg. [1] u1 hmc681lp5(e) variable gain amplifi er pcb [2] 119169 evaluation pcb [1] please reference components for selected frequencies table. [2] circuit board material: arlon 25fr hmc681lp5 / 681lp5e v00.0508 0.5 db lsb gaas mmic 6-bit digital variable gain amplifier w/ serial control, dc - 1 ghz
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