digital switched delay line, 1.8 - 2.4 ghz MAMUSM0008 bga package v 1 .00 features n 750 ps dynamic range, 50 ps step size n bga package n parallel control interface n positive control logic n cascadable n no off c hip components required description the m/a - com MAMUSM0008 is a 0 to 750 ps variable delay line controlled by 4 complementary b it pairs. it provides the user with 50 ps delay step sizes for use in standard wireless applications. the MAMUSM0008 is par ticularly useful in providing time delay in the cancellation loops of feed - forward amplifiers. electrical specifications : t a = 25 c, z 0 = 50 w parameter conditions units min. typ. max. frequency 1.8 - 2.4 ghz ? ? ? ? delay line control range ? ps 0 ? 750 delay line control step size ? ps ? 50 ? delay step accuracy 5 ps +5% of step size in ps ? ? ? ? output return loss ? db 15 20 ? input return loss ? db 15 20 ? input p1db ? dbm 27 ? ? insertion loss ? db 5 ? 8 output ip3 pin = 0 dbm, 5 mhz spacing dbm 36 38 ? control voltage ? v 2.7 3 8.5 control current ? a 2 20 50 switching speed (50% ttl to 90% rf) 3v control ns ? 72 100 block diagram absolute maximum ratings 1 1. t a = +25c (unless otherwise specified) parameter absolute maximum control voltage 8.5v maximum rf input power +30 dbm operating temperature - 40c to +85c storage temperature - 55c to +125c 50 ps 100 ps 200 ps 400 ps
digital switched delay line, 1.8 - 2.4 ghz MAMUSM0008 specifications subject to change without notice. n north america: tel. (800) 366 - 2266 n asia/pacific: tel.+ 81 - 44 - 844 - 8296 , fax + 81 - 44 - 844 - 8298 n europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 1 .00 2 typical performance curves delay vs. frequency oip3 vs. frequency phase vs. frequency input return loss vs. frequency insertion loss vs. frequency output return loss vs. frequency 0.0 10.0 20.0 30.0 40.0 50.0 1.8 2.0 2.2 2.4 frequency (ghz) oip3 (dbm) 6.0e-10 7.0e-10 8.0e-10 9.0e-10 1.0e-09 1.1e-09 1.2e-09 1.3e-09 1.4e-09 1.5e-09 1.6e-09 1.8 1.9 2.0 2.2 2.3 2.4 frequency (ghz) delay (s) -40 -35 -30 -25 -20 -15 -10 1.8 2.0 2.1 2.3 2.4 frequency (ghz) s11 (db) -8.0 -7.5 -7.0 -6.5 -6.0 -5.5 -5.0 1.80 1.95 2.10 2.25 2.40 frequency (ghz) il (db) -40 -35 -30 -25 -20 -15 -10 1.8 2.0 2.1 2.3 2.4 frequency (ghz) s22 (db) -1.0 -0.8 -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8 1.0 1.8 2.0 2.1 2.3 2.4 frequency (ghz) phase (degrees)
digital switched delay line, 1.8 - 2.4 ghz MAMUSM0008 specifications subject to change without notice. n north america: tel. (800) 366 - 2266 n asia/pacific: tel.+ 81 - 44 - 844 - 8296 , fax + 81 - 44 - 844 - 8298 n europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 1 .00 3 typical performance curves insertion loss vs. frequency over temperature at 750 ps state insertion loss vs. frequency over temperature at 0 ps state -10.0 -9.0 -8.0 -7.0 -6.0 -5.0 1.8 2.0 2.1 2.3 2.4 frequency (ghz) il (db) -40c +25c +85c input return loss vs. frequency (+85c) output return loss vs. frequency (+85c) -40 -35 -30 -25 -20 -15 -10 1.80 1.95 2.10 2.25 2.40 frequency (ghz) s11(db) -40 -35 -30 -25 -20 -15 -10 1.8 2.0 2.1 2.3 2.4 frequency (ghz) s11(db) -8.0 -7.0 -6.0 -5.0 -4.0 1.8 2.0 2.1 2.3 2.4 frequency (ghz) il (db) -40c +25c +85c
digital switched delay line, 1.8 - 2.4 ghz MAMUSM0008 specifications subject to change without notice. n north america: tel. (800) 366 - 2266 n asia/pacific: tel.+ 81 - 44 - 844 - 8296 , fax + 81 - 44 - 844 - 8298 n europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 1 .00 4 pin - out diagram 18 17 16 15 14 13 12 11 10 9 8 7 6 8 4 3 2 1 gnd gnd gnd gnd gnd gnd gnd rf_ out gnd a gnd gnd gnd gnd gnd gnd gnd gnd gnd b gnd ctl _c2 gnd ctl _d1 gnd ctl _d2 gnd gnd gnd c ctl _c1 gnd gnd d gnd gnd gnd e gnd gnd gnd f gnd gnd gnd g gnd gnd gnd h gnd gnd gnd j gnd gnd gnd k gnd gnd gnd l gnd gnd gnd m gnd gnd gnd n gnd gnd gnd p gnd ctl _b2 gnd r gnd ctl _b1 gnd ctl _a2 ctl _a1 gnd gnd gnd gnd t gnd gnd gnd gnd gnd gnd gnd gnd gnd u gnd gnd gnd gnd gnd gnd gnd rf_ in gnd v
digital switched delay line, 1.8 - 2.4 ghz MAMUSM0008 specifications subject to change without notice. n north america: tel. (800) 366 - 2266 n asia/pacific: tel.+ 81 - 44 - 844 - 8296 , fax + 81 - 44 - 844 - 8298 n europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 1 .00 5 control herein is described the control method for the MAMUSM0008 digital delay line. the information will be aimed specificall y at the use of the delay line mounted on a m/a - com test sample board. the same theory and control scheme can be applied direct ly to the component by itself. this product allows the insertion of a variable electrical delay between its two ports. the cont rol consists of four complimentary bit pairs (8 bits total). each pair is given a different letter, as shown in the table to th e right: delay line associated letter 50 ps a 100 ps b 200 ps c 400 ps d note that each delay line has a pair named as follows: ctl_a1 and ctl_a2, ctl_b1 and ctl_b2, ctl_c1 and ctl_c2, ctl_d1 and ctl_ d2. d2 d1 c2 c1 b2 b1 a2 a1 hex decimal state ps delay 10101010 aa 170 0 0 10101001 a9 169 1 50 10100110 a6 166 2 100 10100101 a5 165 3 150 10011010 9a 154 4 200 10011001 99 153 5 250 10010110 96 150 6 300 10010101 95 149 7 350 01101010 6a 106 8 40 01101001 69 105 9 450 01100110 66 102 10 500 01100101 65 101 11 550 01011010 5a 90 12 600 01011001 59 89 13 650 01010110 56 86 14 700 01010101 55 85 15 750 the above table illustrates the method of controlling the bits for the desired delay in pico seconds. the hex and decimal repr esentations are included for programming purposes. ?1? denotes 5 volts and ?0? denotes 0 volts. a given delay line is set when bits 2 and bit 1 are set to 0 and 1 respectively. the given delay line is bypassed when the bits 2 and 1 are set to 1 and 0 respectively. the ?gnd? pin on the test board header must be connected to the dc supply ground.
digital switched delay line, 1.8 - 2.4 ghz MAMUSM0008 specifications subject to change without notice. n north america: tel. (800) 366 - 2266 n asia/pacific: tel.+ 81 - 44 - 844 - 8296 , fax + 81 - 44 - 844 - 8298 n europe: tel. +44 (1344) 869 595, fax+44 (1344) 300 020 visit www.macom.com for additional data sheets and product information. v 1 .00 6 m easurement the simplest way to measure the delay steps is with a ve c- tor network analyzer (vna). for taking s - parameter data, perform a standard calibration and measure the p a- rameters for the given state. below is a description of how to see the delay accurately. m/a - com recommends the following measurement pr o- cedure: set the delay line to the reference or insertion delay state. with the two ports of the vna connected to the ?in? and ?out? on the test board, measuring s21, set display memory, and display data/memory. this will normalize your data to the ref erence insertion state. next, switch the measurement format to phase. this should be flat and zero due to the normalization. switch in the first delay line. (50ps). the display will not remain on zero, but will have an offset. under the scale/ reference menu, select electrical delay, and dial that up until the data reads zero again, across the band of interest. that e lectrical delay will be 50ps. continue to switch in the delay lines, dialing in more delay each time. other methods are possible, but this is the most straigh t- fo r ward approach. we do not recommend using the ?delay? format in the vna. the vna?s method of measuring this results in a noisy response, and is less accurate than the method outlined above. upon request, m/a - com can provide a test control board to ease stepping through the states. ordering information part number package MAMUSM0008 bulk packaging MAMUSM0008tr tape and ree l (1k reel) MAMUSM0008 - tb units mounted on test board
|
