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 attenuators - digital - smt 5 5 - 218 HMC759LP3E 0.25 db lsb bicmos mmic 7-bit digital attenuator, 10 - 300 mhz v00.0909 functional diagram electrical specifi cations t a = +25 c, 50 system, with vdd1 = vdd2 = +5v & vctl = 0/+5v the HMC759LP3E is a 7-bit bicmos digital attenuator in a low cost leadless smt package. this versatile digital attenuator incorporates off-chip ac ground capacitors for near dc operation, making it suitable for a wide variety of rf and if applications. the control interface is cmos/ttl compatible and accepts a three wire serial input. the HMC759LP3E features user selectable power up states and a serial output port for cascading other hittite serial controlled components. the HMC759LP3E is housed in a rohs compliant 3x3 mm qfn leadless package, and occupies only 9 mm 2 . parameter frequency (mhz) min. typ. max. units insertion loss 10 - 300 3.3 4.5 db attenuation range 10 - 300 31.75 db return loss (rf1, rf2, all atten. states) 10 - 300 10 db attenuation accuracy: (referenced to insertion loss) all attenuation states 10 - 300 (0.05 + 1.5% of atten. settling) max. db input power for 1 db compression 10 - 50 50 - 300 20 21 dbm dbm input third order intercept point (two-tone input power= 0 dbm each tone) 10 - 50 50 - 300 39 >40 dbm dbm bias current (idd1 + idd2) 10 - 300 300 650 1000 a switching time (50% le to 90% rf) 10 - 300 15 ns typical applications features general description the HMC759LP3E is ideal for: ? cellular/3g infrastructure ? wibro / wimax / 4g ? microwave radio & vsat ? test equipment and sensors ? if & rf applications 0.25 db lsb steps to 31.75 db power-up state selection high input ip3: +40 dbm ttl/cmos compatible, serial control excellent state & step accuracy 0.25 db single +5v supply 16 lead 3x3mm smt package: 9mm 2
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 attenuators - digital - smt 5 5 - 219 output return loss [1] (only major states are shown) input return loss [1] (only major states are shown) normalized attenuation [1] (only major states are shown) insertion loss vs. temperature [1] [1] data taken with broadband dc blocking on rf input and output ports. [2] c1, c2 = 10nf bit error vs. frequency [2] (only major states are shown) bit error vs. attenuation state [2] HMC759LP3E v00.0909 0.25 db lsb bicmos mmic 7-bit digital attenuator, 10 - 300 mhz -5 -4 -3 -2 -1 0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 +25c +85c -40c frequency (ghz) insertion loss (db) -35 -30 -25 -20 -15 -10 -5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 frequency (ghz) return loss (db) 31.75 db 16 db 8 db 4 db -0.5 -0.25 0 0.25 0.5 0 4 8 12 16 20 24 28 32 attenuation state ( db ) bit error (db) 10 mhz 200 mhz 300 mhz -35 -30 -25 -20 -15 -10 -5 0 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 frequency (ghz) normalized attenuation (db) 31.75 db 16 db 8 db 4 db -20 -15 -10 -5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 frequency (ghz) return loss (db) 31.75 db 0 db -0.5 -0.25 0 0.25 0.5 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 frequency ( ghz ) bit error (db) 31.75 db
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 attenuators - digital - smt 5 5 - 220 worst case step error between successive attenuation states [1] ip3 vs. attenuation states [1] (only major states are shown) input p1db vs. attenuation states [1][2] (only major states are shown) HMC759LP3E v00.0909 0.25 db lsb bicmos mmic 7-bit digital attenuator, 10 - 300 mhz serial control interface the HMC759LP3E contains a 3-wire spi compatible digital interface (serin, clk, le). the 7-bit serial word must be loaded msb fi rst. the positive-edge sensitive clk and le requires clean transitions. if mechanical switches are used, sufficient debouncing should be provided. when le is high, 7-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. -0.2 -0.15 -0.1 -0.05 0 0.05 0.1 0.15 0.2 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 frequency ( ghz ) step error (db) 31.75 db 25 30 35 40 45 50 55 60 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 frequency (ghz) ip3 (dbm) 31.75 db 16 db 8 db 0 db 16 18 20 22 24 0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 frequency (ghz) p1db (dbm) 4 db 8 db 16 db [1] c1, c2 = 10nf [2] part does not enter 1 db compression at 31.75 db max attenuation up to 25 dbm input power.
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 attenuators - digital - smt 5 5 - 221 HMC759LP3E v00.0909 0.25 db lsb bicmos mmic 7-bit digital attenuator, 10 - 300 mhz bias voltage vdd (v) idd (typ.) (a) 4.5 580 5.0 650 5.5 710 pup truth table truth table power-up states le pup1 pup2 relative attenuation 000 -31.75 010 -24 001 -16 011 insertion loss 1xx indeterminate if le is set to logic low at power-up, the logic state of pup1 and pup2 determines the power-up state of the part per pup truth table. if the le is kept high at power up, power up state will be indeterminate there- fore is not recommended. power-on 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 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 control voltage table state vdd = +5v low 0 to 0.8v @ <1 a high 2 to 5v @ <1 a control voltage input reference insertion loss (db) d6 d5 d4 d3 d2 d1 d0 high high high high high high high 0 high high high high high high low 0.25 high high high high high low high 0.5 high high high high low high high 1 high high high low high high high 2 high high low high high high high 4 high low high high high high high 8 low high high high high high high 16 low low low low low low low 31.75 any combination of the above states will provide an attenuation equal to the sum of the bits selected.
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 attenuators - digital - smt 5 5 - 222 absolute maximum ratings rf input power (rf1, rf2) 20 dbm (t = +85 c) digital inputs (serin le, clk, pup1, pup2) -0.5 to vdd +0.5v bias voltage (vdd) 5.6v channel temperature 125 c continuous pdiss (t = 85 c) (derate 9.8 mw/c above 85 c) 0.29 w thermal resistance (channel to ground paddle) 138 c/w storage temperature -65 to +150 c operating temperature -40 to +85 c esd sensitivity (hbm) class 1a electrostatic sensitive device observe handling precautions 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 [1] HMC759LP3E rohs-compliant low stress injection molded plastic 100% matte sn msl1 [2] 759 xxxx [1] 4-digit lot number xxxx [2] max peak refl ow temperature of 260 c package information HMC759LP3E v00.0909 0.25 db lsb bicmos mmic 7-bit digital attenuator, 10 - 300 mhz
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 attenuators - digital - smt 5 5 - 223 HMC759LP3E v00.0909 0.25 db lsb bicmos mmic 7-bit digital attenuator, 10 - 300 mhz pin number function description interface schematic 1vdd1 this pin should be pulled high to vdd through a 39 k resistor. 2serin see truth table, control voltage table and timing diagram. 3le 4clk 5pup1 6pup2 7 serout serial input data delayed by 7 clock cycles. 8, 13 rf1, rf2 this pin is dc coupled and matched to 50 ohms. blocking capacitors are required. 9 - 12 acg0 - 3 external capacitors to ground are required. place these capacitors close to the package. 14 gnd this pin and package bottom must be connected to rf/dc ground. 15 vdd2 supply voltage. 16 n/c this pin is not connected internally; however, all data shown herein was measured with this pin connected to rf/dc ground externally. pin descriptions
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 attenuators - digital - smt 5 5 - 224 application circuit HMC759LP3E v00.0909 0.25 db lsb bicmos mmic 7-bit digital attenuator, 10 - 300 mhz
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 attenuators - digital - smt 5 5 - 225 HMC759LP3E v00.0909 0.25 db lsb bicmos mmic 7-bit digital attenuator, 10 - 300 mhz 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 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. the evaluation circuit board shown is available from hittite upon request. list of materials for evaluation pcb 125228 [1] item description j1, j2 pcb mount sma connector j3 18 pin dc connector j4, j5 dc pin c1 - c6 10 nf capacitor, 0402 pkg. c7, c8 100 pf capacitor, 0402 pkg. c9 1 nf capacitor, 0402 pkg. c10 4.7 f capacitor, 0805 pkg. r1 - r4 39k ohm resistor, 0402 pkg. u1 HMC759LP3E digital attenuator pcb [2] 125226 evaluation pcb [1] reference this number when ordering complete evaluation pcb [2] circuit board material: arlon 25fr or rogers 4350
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