page 1 of 8 digital step attenuator case style: dg983-2 the big deal ? wideband, operates up to 4 ghz ? immune to latchup ? high ip3, 52 dbm product overview the dat-15r5a+ series of 50 ? digital step attenuators provides adjustable attenuation from 0 to 15.5 db in 0.5 db steps. the control is a 5-bit serial/parallel interface, and the attenuators operate with either single positive or dual (positive and negative) supply voltage. dat-15r5a+ series models are produced by a unique cmos process on silicon, offering the performance of gaas with the advantages of conventional cmos devices. feature advantages wideband operation, specifed from dc to 4.0 ghz can be used in multiple applications such as communications, satellite and defense, reducing part count. serial or parallel interface models available with serial or parallel interface mode to suit customer demand. good vswr, 1.2:1 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 voltages, +2.3/2.7 to 5.2v wide range fo positive operating voltages allows the dat-15r5a+ series of models to be used in a wide range of applications. see application note an-70-006 for operation above +3.6v footprint compatible to dat-15r5-xx+ series (xx=sn/sp/pn/pp) can ft into existing footprint and provide improved performance. dat-15r5a+ series key features 50 ? 0 to 15.5 db, 0.5 db step dc to 4.0 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 ? immune to latch up ? excellent accuracy, 0.1 db typ ? low insertion loss ? high ip3, +52 dbm typ ? very low dc power consumption ? excellent return loss, 20 db typ ? small size 4.0 x 4.0 mm typical applications ? base station infrastructure ? portable wireless ? catv & dbs ? mmds & wireless lan ? wireless local loop ? unii & hiper lan ? power amplifer distortion canceling loops general description the DAT-15R5A-PP+ is a 50 ? rf digital step attenuator that offers an attenuation range up to 15.5 db in 0.5 db steps. the control is a 5-bit parallel interface, operating on single (positive) supply voltage. the dat- 15r5a-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 15 db, 0.5 db step 5 bit, parallel control interface, single supply voltage 50 ? dc-4000 mhz simplifed schematic DAT-15R5A-PP+ case style: dg983-2 rf input 8db 4db 2db 1db 0.5db parallel control control logic interface latch enable rf out rev. c m164761 DAT-15R5A-PP+ rs/th/cp 170911 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 rf electrical specifcations (note 1) , dc-4000 mhz, t amb =25c, v dd =+3v parameter freq. range (ghz) min. typ. max. units accuracy @ 0.5 db attenuation setting dc-1 0.03 0.1 db 1-2.4 0.05 0.15 2.4-4 0.07 0.2 accuracy @ 1 db attenuation setting dc-1 0.02 0.1 db 1-2.4 0.05 0.15 2.4-4 0.1 0.25 accuracy @ 2 db attenuation setting dc-1 0.05 0.15 db 1-2.4 0.15 0.25 2.4-4 0.15 0.35 accuracy @ 4 db attenuation setting dc-1 0.07 0.2 db 1-2.4 0.15 0.25 2.4-4 0.23 0.5 accuracy @ 8 db attenuation setting dc-1 0.03 0.2 db 1-2.4 0.15 0.5 2.4-4 0.6 0.8 insertion loss (note 2) @ all attenuator set to 0db dc-1 1.3 1.9 db 1-2.4 1.6 2.4 2.4-4 2.1 3.0 input ip3 (note 3) (at min. and max. attenuation) dc-4 +52 dbm input power @ 0.2db compression (note 3) (at min. and max. attenuation) dc-4 +24 dbm input operating power 10 khz to 50 mhz see fig. 1 dbm >50 mhz +24 vswr dc-1 1.2 1.5 :1 1-2.4 1.2 1.6 2.4-4 1.4 1.9 notes: 1. tested on evaluation board tb-339, see figure 3. 2. insertion loss values are de-embedded from test board loss (test boards insertion loss: 0.10db @100mhz, 0.35db @1000mhz, 0.60db @2400mhz, 0.75db @4000mhz). 3. input ip3 and 1db compression degrades below 1 mhz. input power not to exceed max operating specifcation for continuous operation. switching specifcations parameter min. typ. max. units switching speed, 50% control to 0.5db of attenuation value 1.0 sec switching control frequency 25 khz dc electrical specifcations parameter min. typ. max. units v dd dd absolute maximum ratings (note 6,7) parameter ratings operating temperature -40c to 105c storage temperature -65c to 150c v dd digital step attenuator DAT-15R5A-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 n/c 1 not connected (note 4) 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 n/c 7 not connected 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. n/a 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 200 k ? resistor to ground. parallel serial gnd gnd gnd gnd vdd vdd vdd n/c n/c rfout c8 le clock data rfin n/c 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 n/c rfout c8 le gnd n/c rfin n/c 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 ds50 digital step attenuator DAT-15R5A-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 2 (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 2: parallel interface timing diagram the DAT-15R5A-PP+ parallel interface consists of 5 control bits that select the desired attenuation state, as shown in table 1: truth table table 1. truth table attenuation state c8 c4 c2 c1 c0.5 reference 0 0 0 0 0 0.5 (db) 0 0 0 0 1 1 (db) 0 0 0 1 0 2 (db) 0 0 1 0 0 4 (db) 0 1 0 0 0 8 (db) 1 0 0 0 0 15.5 (db) 1 1 1 1 1 note: not all 32 possible combinations of c0.5 - c8 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 8 : c 0 . 5 le t l e p w rf input 8db 4db 2db 1db 0.5db parallel control control logic interface latch enable rf out digital step attenuator DAT-15R5A-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-15R5A-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 two possible values .these two values are selected by the power-up control bit, 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-c8 and pup2 is not active. table 3. power-up truth table, parallel mode attenuation state pup2 le reference 0 0 8 (db) 1 0 defned by c0.5-c8 (see table 1-truth table) x (note 1) 1 note 1: pup2 connection may be 0, 1, ground, or not connect, without effect on attenuation state. digital step attenuator DAT-15R5A-PP+ mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com
page 7 of 8 bill of materials n5, n7, n9, n11, n13 n15, n21 & n25 resistor 0603 10 kohm 1% n28 & n29 resistor 0603 475 ohm 1% n35 - n37 resistor 0603 0 ohm n17 resistor 0402 10 kohm 1% n6, n8, n10, n12, n14, n16, n24, n26 & n32 npo capacitor 0603 100pf 5% n27 & n31 tantalum capacitor 0805 100nf 10% n3 & n4 hex invert trigger msl1 n23 dual schmitt trigger buffer sc-70 msl1 tb-339 notes 1. both rf ports must be held at 0vdc or dc blocked with an external series capacitor. 2. test board tb-339 is designed for operation for vdd=2.3 to 3.6v. for operation over 3.6v to 5.2v, see application note an-70-006 3. vdd=vdd fig 3. evaluation board schematic, tb-339, used for characterization (dut not soldered on tb-339) test equipment for insertion loss, isolation and return loss: agilents e5071c network analyzer & e3631a power supply. for compression: agilents n9020a signal analyzer, e8247c rf generator, e3631a power supply & u2004a power sensor. for input ip3: agilents n9020a signal analyzer, n5181a signal generators, e3631a power supply, u2004a power sensor. for spurs: agilent n5181a signal generator, e4440a spectrum analyzer. for switching time: agilents n5181a signal generator, 81110a pulse generator, 54832b oscilloscope, e3631a power supply. for max control frequency: agilents n5181a signal generator, n9020a signal analyzer, e3631a power supply, 81110a pulse generator. measurement conditions for insertion loss, isolation and return loss: vdd=+2.3/+3/+5.5v &pin=0dbm for compression: pin=0/+24dbm. vdd=+3v for input ip3: pin=+10dbm/tone. tone spacing: 0.1 mhz to 1 mhz rf freq and 1 mhz to 4200 mhz rf freq, vdd=+3v for spurs: rf in at 1000mhz and -20dbm. vdd=+3v for switching time: rf freq=501mhz/0dbm, pulse for le=1hz/0/+3.4v, delay=500ms, width=500ms. vdd=+3v for max control frequency: rf freq=501mhz, 0dbm. vdd=+3v digital step attenuator DAT-15R5A-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 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 or 200 devices 13 reels with 3k devices suggested layout for pcb design pl-197 evaluation board tb-339 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-15R5A-PP+ mini-circuits ? www.minicircuits.com p.o. box 350166, brooklyn, ny 11235-0003 (718) 934-4500 sales@minicircuits.com
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