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  page 1 of 8 digital step attenuator case style: dg983-2 the big deal ? wideband, operates up to 2.5 ghz ? glitchless attenuation transitions ? high ip3, 52 dbm product overview the dat-31575a+ series of 75 ? digital step attenuators provides adjustable attenuation from 0 to 31.5 db in 0.5 db steps. the control is a 6-bit serial/parallel interface, and the attenuators operate with either single positive or dual (positive and negative) supply voltage. dat-31575a+ series models are produced by a unique cmos process on silicon, offering the performance of gaas with the advantages of conven - tional cmos devices. feature advantages wideband operation, specifed from 1mhz to 2.5 ghz can be used in multiple applications such as various versions of docsis, satellite and defense, reducing part count. serial or parallel interface models available with serial or parallel interface mode to suit customer demand. good vswr, 1.3:1 typ. eases interfacing with adjacent components and results in low amplitude ripple. single positive supply models: (model suffxes: -sp+ and Cpp+) +2.3 to +3.6v+ use of single positive supply simplifes power supply design. an internal negative voltage generator supplies the desired negative voltage. single positive supply results in excellent spurious performance, -140 dbm typical. dual supply models: (model suffxes: -sn+ and Cpn+) +2.7 to +3.6v (positive) and -3.6 to -3.2v (negative) dual supply provides spurious-free operation. it also allows fast switching up to 1 mhz (vs. 25 khz for single supply). useable over a wide range of supply volt - ages, +2.3/2.7 to 5.2v wide range fo positive operating voltages allows the dat-31575a+ series of models to be used in a wide range of applications. see application note an-70-032 for operation above +3.6v footprint compatible to dat-31575-xx+ series (xx=sn/sp/pn/pp) can ft into existing footprint and provide wideband performance, to 2.5 ghz instead of 2.0 ghz. glitchless attenuation transitions, 0.26 typical compared to previous generation of digital attenuators which is a vast improvement. dat-31575a series key features 75 ? 0 to 31.5 db, 0.5 db step 1mhz to 2.5 ghz surface mount mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com
page 2 of 8 product features ? single positive supply voltage ? immune to latch up ? glitchless attenuation transitions ? excellent accuracy, 0.1 db typ ? low insertion loss ? high ip3, +55-59 dbm typ ? very low dc power consumption ? excellent return loss, 18 db typ ? small size 4.0 x 4.0 mm typical applications ? docsis ? 3.1 ? portable wireless ? catv & dbs ? mmds & wireless lan ? wireless local loop ? unii & hiper lan ? power amplifer distortion canceling loops general description the DAT-31575A-PP+ is a 50 ? rf digital step attenuator that offers an attenuation range up to 31.5 db in 0.5 db steps. the control is a 6-bit parallel interface, operating on single (positive) supply voltage. the dat- 31575a-pp+ is produced using a unique cmos process on silicon, offering the performance of gaas, with the advantages of conventional cmos devices. digital step attenuator 31.5 db, 0.5 db step 6 bit, parallel control interface, single supply voltage 75 ? 1-2500 mhz simplifed schematic rf input 16db 8db 4db 2db 1db parallel control internal control logic interface latch enable 0.5db rf out rev. a m158000 DAT-31575A-PP+ rs/cp 160908 DAT-31575A-PP+ case style: dg983-2 mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com +rohs compliant the +suffix identifies rohs compliance. see our web site for rohs compliance methodologies and qualifications
page 3 of 8 4. permanent damage may occur if any of these limits are exceeded. 5. operation between max operating and absolute max input power will result in reduced reliability. 1. i. loss values are de-embedded from test board loss (test boards insertion loss: 0.10db @100mhz, 0.40db @1200mhz, 0.55db @2000mhz, 0.75db @4000mhz). 2. for operation above +3.6v see application note, an-70-032 3. 0 volt during power up. rf electrical specifcations, 1-2500 mhz, t amb =25c, v dd =+3v, 75 ? parameter freq. range (ghz) min. typ. max. units accuracy @ 0.5 db attenuation setting 0.001-1.2 0.03 0.17 db 1.2-2.0 0.05 0.18 2.0-2.5 0.1 0.19 accuracy @ 1 db attenuation setting 0.001-1.2 0.03 0.18 db 1.2-2.0 0.1 0.20 2.0-2.5 0.1 0.23 accuracy @ 2 db attenuation setting 0.001-1.2 0.07 0.21 db 1.2-2.0 0.15 0.26 2.0-2.5 0.15 0.31 accuracy @ 4 db attenuation setting 0.001-1.2 0.05 0.27 db 1.2-2.0 0.15 0.36 2.0-2.5 0.2 0.47 accuracy @ 8 db attenuation setting 0.001-1.2 0.1 0.39 db 1.2-2.0 0.24 0.60 2.0-2.5 0.35 0.79 accuracy @ 16 db attenuation setting 0.001-1.2 0.23 0.63 db 1.2-2.5 0.8 1.0 2.0-2.5 0.8 1.43 insertion loss 1 @ all attenuator set to 0db 0.001-1.2 1.2 1.8 db 1.2-2.5 1.6 1.9 vswr 0.001-1.2 1.3 :1 1.2-2.5 1.4 input ip3 (at min. and max. attenuation) .005-2.5 55-69 dbm input ip2 0.005-2.5 see fig. 1 dbm input power @ 0.1db compression (at min. and max. attenuation) 0.030-2.5 +30 dbm input operating power 1 mhz to 30 mhz see fig. 2 dbm >30 mhz +24 thermal resistance (junction to case) 25 c/w switching specifcations parameter min. typ. max. units switching speed, 50% control to 90% or 10% rf 0.4 0.7 sec switching control frequency 25 khz dc electrical specifcations parameter min. typ. max. units v dd dd 0 20 40 60 80 100 120 5 50 500 5000 iip2 (dbm) frequency (mhz) 0 db 31.5 db figure 1. ip2 versus frequency and attenuation absolute maximum ratings 4 parameter ratings operating temperature -40c to 105c storage temperature -65c to 150c v dd digital step attenuator DAT-31575A-PP+ mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com
page 4 of 8 pin description pin confguration (top view) function pin number description c16 1 control for attenuation bit, 16db (note 3, 7) rf in 2 rf in port (note 1) n/c 3 not connected (note 4) gnd 4 ground connection le 5 latch enable input (note 2) v dd 6 positive supply voltage pup1 7 power-up selection (note 7) pup2 8 power-up selection v dd 9 positive supply voltage gnd 10 ground connection gnd 11 ground connection gnd 12 ground connection (note 6) gnd 13 ground connection rf out 14 rf out port (note 1) c8 15 control for attenuation bit, 8 db c4 16 control for attenuation bit, 4 db c2 17 control for attenuation bit, 2 db gnd 18 ground connection c1 19 control for attenuation bit, 1 db c0.5 20 control for attenuation bit, 0.5 db (note 7) gnd paddle paddle ground (note 5) notes: 1. both rf ports must be held at 0vdc or dc blocked with an external series capacitor. 2. latch enable (le) has an internal 2m ? to internal positive supply voltage. 3. place a 10k ? resistor in series to be compatible with previous generation of models. and 10k ? maybe omitted in new designs. 4. place a shunt 10k ? resistor to gnd 5. the exposed solder pad on the bottom of the package (see pin confguration) must be grounded for proper device operation. 6. ground must be less than 80 mil (0.08) from pin 12 for proper device operation. 7. this pin has an internal 1m ? resistor to ground. parallel serial gnd gnd gnd gnd vdd vdd vdd n/c n/c rfout c8 le clock data rfin c16 c4 c2 c1 c0.5 2x2mm paddle ground 15 14 13 12 11 1 2 3 4 5 6 7 8 9 20 19 18 17 16 10 gnd gnd gnd gnd gnd vdd vdd pup2 pup1 rfout c8 le gnd n/c rfin c16 c4 c2 c1 c0.5 2x2mm paddle ground 15 14 13 12 11 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 device marking mcl pin 1 index ds75 figure 2. max input power vs. frequency. pulsed power: 5% duty cycle, 4620 s period 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 1.0 10.0 100.0 1000.0 input power (dbm) frequency (mhz) absolute max power max operating-pulsed (>= 30 mhz) max operating -cw & pulsed (< 30 mhz) max operating - cw ( 30 mhz) digital step attenuator DAT-31575A-PP+ mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com
page 5 of 8 the parallel interface timing requirements are defned by figure 3 (parallel interface timing diagram) and table 2 (parallel interface ac characteristics), and switching speed. for latched parallel programming the latch enable (le) should be held low while changing attenuation state control values, then pulse le high to low (per figure 1) to latch new attenuation state into device. for direct parallel programming, the latch enable (le) line should be pulled high. changing attenuation state control values will change device state to new attenuation. direct mode is ideal for manual control of the device (using hardwire, switches, or jumpers). simplifed schematic figure 3: parallel interface timing diagram the DAT-31575A-PP+ parallel interface consists of 6 control bits that select the desired attenuation state, as shown in table 1: truth table table 1. truth table attenuation state c16 c8 c4 c2 c1 c0.5 reference 0 0 0 0 0 0 0.5 (db) 0 0 0 0 0 1 1 (db) 0 0 0 0 1 0 2 (db) 0 0 0 1 0 0 4 (db) 0 0 1 0 0 0 8 (db) 0 1 0 0 0 0 16 (db) 1 0 0 0 0 0 31.5 (db) 1 1 1 1 1 1 note: not all 64 possible combinations of c0.5 - c16 are shown in table table 2. parallel interface ac characteristics symbol parameter min. max. units t lepw le minimum pulse width 10 ns t pdsup data set-up time before clock rising edge of le 10 ns t pdhld data hold time after clock falling edge of le 10 ns t p d s u p t p d h l d p ar a l l e l d at a c 1 6 : c 0. 5 le t l e p w rf input 16db 8db 4db 2db 1db parallel control internal control logic interface latch enable 0.5db rf out digital step attenuator DAT-31575A-PP+ mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com
page 6 of 8 the DAT-31575A-PP+ always assumes a specifable attenuation setting on power-up, allowing a known at - tenuation state to be established before an initial parallel control word is provided. when the attenuator powers up with le=0, the control bits are automatically set to one of four possible val - ues .these four values are selected by the two power-up control bits,pup1 and pup2 ,as shown in table 3: (power-up truth table, parallel mode). power-up control settings power-up with le=1 provides normal parallel operation with c0.5-c16, and pup1 and pup2 are not active. table 3. power-up truth table, parallel mode attenuation state pup1 pup2 le reference 0 0 0 8 (db) 0 1 0 16 (db) 1 0 0 31.5 (db) 1 1 0 defned by c0.5-c16 (see table 1-truth table) x (note 1) x (note 1) 1 note 1: pup1 and pup2 connection may be 0, 1, ground, or not con - nect, without effect on attenuation state. digital step attenuator DAT-31575A-PP+ mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com
page 7 of 8 digital step attenuator DAT-31575A-PP+ mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com
page 8 of 8 esd rating human body model (hbm): class 1c (1000 to <2000v) in accordance with mil-std-883 method 3015 charge device model class c2 (500 to <1000v) per jesd22-c101 msl rating moisture sensitivity: msl1 in accordance with ipc/jedec j-std-020d performance data data table swept graphs s-parameter (s2p files) data set (.zip fle) case style dg983-2 plastic package, exposed paddle, lead fnish: nipdau tape & reel f87 standard quantities available on reel 7 reels with 20, 50, 100, 200, 500 or 1000 devices 13 reels with 3k devices suggested layout for pcb design pl-184 evaluation board tb-337 environmental ratings env33t1 additional detailed technical information additional information is available on our dash board. to access this information click here msl test flow chart additional notes a. performance and quality attributes and conditions not expressly stated in this specifcation document are intended to be excluded and do not form a part of this specifcation document. b. electrical specifcations and performance data contained in this specifcation document are based on mini-circuits applicable established test performance criteria and measurement instructions. c. the parts covered by this specifcation document are subject to mini-circuits standard limited warranty and terms and conditions (collectively, standard terms); purchasers of this part are entitled to the rights and benefts contained therein. for a full statement of the standard terms and the exclusive rights and remedies thereunder, please visit mini-circuits website at www.minicircuits.com/mclstore/terms.jsp visual inspection electrical test sam analysis refow 3 cycles, 260c soak 85c/85rh 168 hours bake at 125c, 24 hours visual inspection electrical test sam analysis start finish digital step attenuator DAT-31575A-PP+ mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com


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