1 ? fn6588.1 caution: these devices are sensitive to electrosta tic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | intersil (and design) is a registered trademark of intersil americas inc. xdcp is a trademark of intersil americas inc. copyright intersil americas inc. 2007, 2008. all rights reserved all other trademarks mentioned are the property of their respective owners. ISL23511 single push butt on controlled potentiometer (xdcp?) low noise, low power, 32 taps, push button controlled potentiometer the intersil ISL23511 is a three-terminal digitally-controlled potentiometer (xdcp) implemen ted by a resistor array composed of 31 resistive elements and a wiper switching network. the ISL23511 features a push button control, a shutdown mode, as well as an industry-leading tqfn package. the push button control has individual pu and pd inputs for adjusting the wiper. to eliminate redundancy, the wiper position will automatically increment or decrement if one of these inputs is held longer than 1s. forcing both pu and pd low for more than 2s activates shutdown mode. shutdown mode disconnects the top of the resistor chain and moves the wiper to the lowest position, minimizing power consumption. the three terminals accessing the resistor chain naturally configure the ISL23511 as a voltage divider. a rheostat is easily formed by floating an end terminal or connecting it to the wiper. features ? solid-state volatile potentiometer ? push button controlled ? single or auto increment/decrement - fast mode after 1s button press ? shutdown mode ? 32 wiper tap points - zero scale wiper position on power-up ? low power cmos -v cc = 2.7v to 5.5v - terminal voltage, 0 to v cc - standby current, 3a max ?r total value = 10k , 50k ? packages - 8 ld soic and 10 ld tqfn (2.1mmx1.6mm) ? pb-free (rohs compliant) applications ? volume control ? led/lcd brightness control ? contrast control ? programming bias voltages ? ladder networks v cc (supply voltage) control block pu pd v ss (ground) r h r l r w 9 8 7 6 1 2 3 4 nc v ss nc r l v cc pu r h 5 10 pd o r w nc v cc nc pu pd r h v ss 1 2 3 4 8 7 6 5 r l r w o tfqfn ( top view ) soic ( top view ) ordering information part number part marking r total (k ) temp. range (c) package (pb-free) pkg. dwg. # ISL23511wfb8z* (note 1) 23511 wfbz 10 -40 to +125 8 ld soic m8.15 ISL23511ufb8z* (note 1) 23511 ufbz 50 -40 to +125 8 ld soic m8.15 ISL23511wfru10z* (note 2) ga 10 -40 to +125 10 ld tqfn l10.2.1x1.6a ISL23511ufru10z* (note 2) fz 50 -40 to +125 10 ld tqfn l10.2.1x1.6a *add ?-tk? suffix for tape and reel. please refe r to tb347 for details on reel specifications. notes: 1. these intersil pb-free plastic packaged pr oducts employ special pb-free material se ts; molding compounds/die attach materials and 100% matte tin plate plus anneal - e3 termination finish, which is ro hs compliant and compatible with both snpb and pb-free solderin g operations. intersil pb-free products are ms l classified at pb-free peak reflow temperatures that meet or exceed the pb-free re quirements of ipc/jedec j std-020. 2. these intersil pb-free plastic packaged pr oducts employ special pb-free material se ts; molding compounds/die attach materials and nipdau plate - e4 termination finish, which is rohs compliant and compatible with both snpb and pb-free soldering operations. intersi l pb-free products are msl classified at pb-free peak re flow temperatures that meet or exceed the pb-free requirements of ipc/jedec j std -020. data sheet january 21, 2008
2 fn6588.1 january 21, 2008 block diagrams pinouts ISL23511 (8 ld soic) top view ISL23511 (10 ld tqfn) top view v cc nc pu pd r h v ss 1 2 3 4 8 7 6 5 r l r w o 9 8 7 6 1 2 3 4 nc v ss nc r l v cc pu r h 5 10 pd o r w nc pin descriptions soic pin tqfn pin symbol brief description 11pu the pu is a negative-edge triggered input with internal pull-up. toggling pu will move the wiper close to r h terminal. 22pd the pd is a negative-edge triggered input with internal pull-up. toggling pd will move the wiper close to r l terminal. 33r h the r h and r l pins of the ISL23511 are equivalent to the fix ed terminals of a mechanical potentiometer. the minimum voltage is v ss and the maximum is v cc . the terminology of r h and rl references the relative position of the terminal in relation to wiper movement direction selected by the pu /pd input. 44v ss ground 56r w the r w pin is the wiper terminal of the potentiometer, which is equivalent to the movabl e terminal of a mechanical potentiometer. 67r l the r h and r l pins of the ISL23511 are equivalent to the fix ed terminals of a mechanical potentiometer. the minimum voltage is v ss and the maximum is v cc . the terminology of r h and r l references the relative position of the terminal in relation to wiper movement direction selected by the pu /pd input. 7 5, 8, 10 nc no connection 89v cc supply voltage 5-bit up/down counter one of decoder resistor array r h pu pd transfer gates thirty r l v cc (supply voltage) general detailed 0 1 2 28 29 30 31 two r w control block pu pd v ss (ground) r h r l r w ISL23511
3 fn6588.1 january 21, 2008 absolute maximum rati ngs thermal information storage temperature . . . . . . . . . . . . . . . . . . . . . . . .-65c to +150c voltage at pu and pd pin with respect to gnd . -0.3v to v cc + 0.3 v cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3v to +6v voltage at any dcp pin with respect to gnd. . . . . . . . -0.3v to v cc i w (10s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6ma latchup . . . . . . . . . . . . . . . . . . . . . . . . . class ii, level a @ +125c esd rating human body model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kv machine model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250v thermal resistance (typical, note 3, 4) ja (c/w) jc (c/w) 8 lead soic . . . . . . . . . . . . . . . . . . . . 120 10 lead tqfn . . . . . . . . . . . . . . . . . 150 48.3 maximum junction temperature (plastic package). . . . . . . . +150c pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/pb-freereflow.asp recommended operating conditions temperature range (extended industrial). . . . . . . .-40c to +125c v cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.7v to 5.5v power rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15mw wiper current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.0ma caution: do not operate at or near the maximum ratings listed fo r extended periods of time. exposure to such conditions may adv ersely impact product reliability and result in failures not covered by warranty. notes: 3. ja is measured with the component mounted on a high effective ther mal conductivity test board in free air. see tech brief tb379 f or details. 4. for jc , the ?case temp? location is the center of the exposed metal pad on the package underside. potentiometer specifications over recommended operating condition s, unless otherwise specified. symbol parameter test conditions min (note 18) typ (note 5) max (note 18) unit r total r h to r l resistance w option 10 k u option 50 k r h to r l resistance tolerance -20 +20 % end-to-end temperature coefficient w option 80 ppm/c (note 16) u option 125 ppm/c (note 16) r w wiper resistance v cc = 3.3v, wiper current i rw = v cc /r total 130 400 v rh , v rl v rh and v rl terminal voltages v rh and v rl to gnd 0 v cc v noise on wiper terminal from 0hz to 10mhz -80 dbv c h /c l /c w (note 17) potentiometer capacitance 10/10/25 pf i lkgdcp leakage on dcp pins voltage at pin from gnd to v cc 0.05 0.4 a voltage divider mode (0v @ r l ; v cc @ r h ; measured at r w unloaded) inl (note 10) integral non-linearity -1 1 lsb (note 6) dnl (note 9) differential non-linearity monotonic over all tap positions -0.5 0.5 lsb (note 6) zserror (note 7) zero-scale error w option 0 0.3 3 lsb (note 6) u option 0 0.3 1 fserror (note 8) full-scale error w option -3 -0.3 0 lsb (note 6) u option -1 -0.3 0 tc v (note 11) ratiometric temperature coefficient wiper from 5 hex to 1f hex for w and u option 25 ppm/c f cutoff 3db cut-off frequency wiper at the middle scale, w option 500 khz wiper at the middle scale, u option 75 khz resistor mode (measurements between r w and r l with r h not connected, or between r w and r h with r l not connected) rinl (note 15) integral non-linearity dcp register set between 1 hex and 1f hex; monotonic over all tap positions; w option -1.5 1.5 mi (note 12) dcp register set between 1 hex and 1f hex; monotonic over all tap positions; u option -1 1 mi (note 12) ISL23511
4 fn6588.1 january 21, 2008 rdnl (note 14) differential non-linearity w and u option -0.5 0.5 mi (note 12) roffset (note 13) offset w option 0 1 3 mi (note 12) u option 0 0.5 1 mi (note 12) potentiometer specifications over recommended operating condition s, unless otherwise specified. (continued) symbol parameter test conditions min (note 18) typ (note 5) max (note 18) unit dc electrical specifications over recommended operating conditions unless otherwise specified. symbol parameter test conditions min (note 18) typ (note 5) max (note 18) unit i cc v cc active current v cc = 5.5v, perform wiper move operation 150 a i sb standby current 0.6 3 a i lkg pu , pd input leakage current v in = v ss to v cc -2 +2 a v ih pu , pd input high voltage v cc x 0.7 v v il pu , pd input low voltage v cc x 0.1 v c in (note 17) pu , pd input capacitance v cc = 3.3v, t a = +25c, f = 1mhz 10 pf rpull_up (note 17) pull-up resistor for pu and pd 1m ac electrical specifications over recommended operating conditions unless otherwise specified. symbol parameter min (note 18) typ (note 5) max (note 18) unit t gap time between two separate push button events 2 ms t db debounce time 15 30 ms t s slow wiper change on a slow mode 100 250 375 ms t s fast wiper change on a fast mode 25 50 75 ms t stdn (note 17) time to enter shutdown mode (keep pu and pd low) 2 s t r vcc v cc power-up rate 0.2 50 v/ms notes: 5. typical values are for t a = +25c and 3.3v supply voltage. 6. lsb: [v(rw) 31 ? v(rw) 0 ]/31. v(rw) 31 and v(rw) 0 are voltage on rw pin for the dcp register set to 1f hex and 00 hex respectively. lsb is the incremental voltage when changing from one tap to an adjacent tap. 7. zs error = v(rw) 0 /lsb. 8. fs error = [v(rw) 31 ? v cc ]/lsb. 9. dnl = [v(rw) i ? v(rw) i-1 ]/lsb -1, for i = 1 to 31; i is the dcp register setting. 10. inl = [v(rw) i ? i ? lsb ? v(rw)]/lsb for i = 1 to 31 11. for i = 5 to 31 decimal, t = -40c to +125c. max( ) is the maximum value of the wiper voltage and min ( ) is the minimum value of the wiper voltage over the temperature range. 12. mi = | rw 31 ? rw 0 | /31. mi is a minimum increment. rw 31 and rw 0 are the measured resistances for the dcp register set to 1f hex and 00 hex respectively. 13. roffset = rw 0 /mi, when measuring between rw and rl. roffset = rw 31 /mi, when measuring between rw and rh. 14. rdnl = (rw i ? rw i-1 )/mi, for i = 1 to 31. 15. rinl = [rw i ? (mi ? i) ? rw 0 ]/mi, for i = 1 to 31. 16. for i = 5 to 31, t = -40c to +125c. max( ) is the maximum value of the resistance and min ( ) is the minimum value of the resistance over the temperature range. 17. limits should be considered ty pical and are not production tested. 18. parts are 100% tested at +25c. over-temperature limits established by characterization and are not production tested. tc v max v rw () i () min v rw () i () ? max v rw () i () min v rw () i () + [] 2 ? --------------------------------------------------------------------------------------------- - 10 6 +165c -------------------- - = tc r max ri () min ri () ? [] max ri () min ri () + [] 2 ? --------------------------------------------------------------- - 10 6 +165c -------------------- - = ISL23511
5 fn6588.1 january 21, 2008 slow mode timing fast mode timing shutdown mode timing t gap t db mi * v w pu * mi in the ac timing diagram refers to the minimum incremental change in the wiper voltage. t db pu t s slow t s fast mi * 1s v w * mi in the ac timing diagram refers to the minimum incremental change in the wiper voltage. v w pu pd 2s t db shutdown mode ISL23511
6 fn6588.1 january 21, 2008 typical performance curves figure 1. wiper resistance vs tap position [ i(rw) = v cc /r total ] for 10k (w) figure 2. standby i cc vs temperature figure 3. dnl vs tap position in voltage divider mode for 10k (w) figure 4. inl vs tap position in voltage divider mode for 10k (w) figure 5. zs error vs temperature figure 6. fs error vs temperature 0 20 40 60 80 100 120 140 160 0 5 10 15 20 25 30 tap position (decimal) wiper resistance ( ) +125 o c +25 o c -40 o c v cc = 5.5v 0 0.5 1.0 1.5 2.0 2.5 3.0 -40 -15 10 35 60 85 110 temperature (c) i cc (a) v cc = 2.7v v cc = 5.5v -0.010 -0.005 0.000 0.005 0.010 0 5 10 15 20 25 30 tap position (decimal) dnl (lsb) v cc = 2.7v v cc = 5.5v -0.03 -0.02 -0.01 0.00 0.01 0.02 0.03 0 5 10 15 20 25 30 tap position (decimal) inl (lsb) v cc = 5.5v v cc = 2.7v 0 0.001 0.002 0.003 0.004 0.005 0.006 -40 -15 10 35 60 85 110 temperature (c) zero scale error (lsb) v cc = 5.5v v cc = 2.7v -0.5 -0.4 -0.3 -0.2 -0.1 0 -40 -15 10 35 60 85 110 temperature (c) full scale error (lsb) v cc = 5.5v v cc = 2.7v ISL23511
7 fn6588.1 january 21, 2008 figure 7. dnl vs tap position in rheostat mode for 10k (w) figure 8. inl vs tap position in rheostat mode for 10k (w) figure 9. end-to-end r total % change vs temperature figure 10. tc for voltag e divider mode in ppm figure 11. tc for rheostat mode in ppm figure 12. frequency response (500khz) typical performance curves (continued) -0.2 -0.1 0.0 0.1 0.2 0 5 10 15 20 25 30 tap position (decimal) rdnl (lsb) v cc = 5.5v v cc = 2.7v 0.0 0.2 0.4 0.6 0.8 0 5 10 15 20 25 30 tap position (decimal) rinl (lsb) v cc = 5.5v v cc = 2.7v -1.2 -0.6 0.0 0.6 1.2 -40 -15 10 35 60 85 110 temperature (c) r total change (%) 10k 50k v cc = 5.5v v cc = 2.7v 0 5 10 15 20 25 30 35 40 5 1015202530 tap position (decimal) tcv (ppm/c) v cc = 2.7v v cc = 5.5v 50k 10k 0 50 100 150 200 250 300 5 1015202530 tap position (decimal) tcr (ppm/c) 50k v cc = 2.7v v cc = 5.5v 10k input sinewave midscale output 3db cutoff = 500khz ISL23511
8 fn6588.1 january 21, 2008 power-up and power-down requirements there are no restrictions on the power-up or power-down conditions of v cc and the voltages applied to the potentiometer pins provided that v cc is always more positive than or equal to v rh and v rl , i.e., v cc v rh, v rl . the v cc ramp rate specification is always in effect. pin descriptions r h and r l the r h and r l pins of the ISL23511 are equivalent to the fixed terminals of a mechanical potentiometer. the minimum voltage is v ss and the maximum is v cc . the terminology of r h and r l references the relative position of the terminal in relation to wiper movement direction. r w the r w pin is the wiper terminal of the potentiometer which is equivalent to the movable terminal of a mechanical potentiometer. the default wiper position at power-up is at 0tap. pu the debounced pu input is used to increment the wiper position. an on-chip pull-up holds the pu input high. a switch closure to ground or a low logic level will, after a debounce time, move the wiper to the next adjacent higher tap position. pd the debounced pd input is used to decrement the wiper position. an on-chip pull-up holds the pd input high. a switch closure to ground or a low logic level will, after a debounce time, move the wiper to the next adjacent lower tap position. device operation there are three sections of the ISL23511: the input control, the counter and decode sectio n and the resistor array. the input control section operates just like an up/down counter. the output of this counter is decoded to turn on a single electronic switch, connecting a point on the resistor array to the wiper output. the resistor array is comprised of 31 individual resistors connected in series. at either end of the array and between each resistor is an electronic switch that transfers the potential at that point to the wiper. the ISL23511 is designed to interface directly to two push button switches for effectively moving the wiper up or down. the pu and pd inputs increment or decrement a 5-bit counter respectively. the output of this counter is decoded to select one of the thirty-two wiper positions along the resistive array. the wiper increment input, pu and the wiper decrement input, pd are both connected to an internal pull-up so that they normally remain high. when pulled low by an external push button switch or a logic low level input, the wiper will be switch ed to the next adjacent tap position. internal debounce circuitry prevents inadvertent switching of the wiper position if pu or pd remain low for less than 15ms, typical. each of the buttons can be pushed either once for a single increment/dec rement or continuously for a multiple increments/decrements. the number of increments/decrements of the wiper position depend on how long the button is being pushed. when making a continuous push, after the first second, the increment/decrement speed increases. for the first second, the device will be in the slow scan mode. then, if the button is held for longer than 1s, the device will go into the fast scan mode. as soon as the button is released, the ISL23511 will return to a stand-by condition. if both pu and pd buttons are pulled low more than 15ms from each other, all commands are ignored upon release of all buttons. the wiper, when at either fi xed terminal, acts like its mechanical equivalent and does not move beyond the last position. that is, the counter does not wrap around when clocked to either extreme. shutdown mode the ISL23511 enters into shutdown mode if both pu and pd inputs are kept low for 2s. in this mode, the resistors array is totally disconnected from its r h pin and the wiper is moved to the position closest to the r l pin, as shown in figure 13. note that pu and pd inputs must be brought low within t db time window of 15ms (see ?shutdown mode timing? on page 5) otherwise all commands will be ignored until both inputs are released. holding either pu or pd input low for more than 15ms will exit shutdown mode and return wiper to prior shutdown position. if pu or pd will be held low for more than 250ms, the ISL23511 will start auto-inc rement or auto-decrement of wiper position. r total with v cc removed the end-to-end resistance of the array will fluctuate once v cc is removed. r l r w r h figure 13. dcp connection in shutdown mode ISL23511
9 fn6588.1 january 21, 2008 ISL23511 ultra thin quad flat no-lead plastic package (utqfn) 6 b e a d 0.10 c 2x 2 0.10 m c a b 0.05 m c (nd-1) x e c 0.05 c a 0.10 c a1 seating plane e index area pin #1 id 3 5 (datum a) (datum b) n-1 1 n nx l nx b 2 1 n top view bottom view side view nx (b) section "c-c" for odd terminal/side e cc 5 c l terminal tip (a1) l detail ?a? pin 1 id l 0.05 min 0.10 min 0.10 c 2x 4xk b l10.2.1x1.6a 10 lead ultra thin quad flat no-lead plastic package symbol millimeters notes min nominal max a 0.45 0.50 0.55 - a1 - - 0.05 - a3 0.127 ref - b 0.15 0.20 0.25 5 d 2.05 2.10 2.15 - e 1.55 1.60 1.65 - e 0.50 bsc - k0.20 --- l 0.35 0.40 0.45 - n102 nd 4 3 ne 1 3 0- 12 4 rev. 3 6/06 notes: 1. dimensioning and tolerancing conform to asme y14.5-1994. 2. n is the number of terminals. 3. nd and ne refer to the number of terminals on d and e side, respectively. 4. all dimensions are in millim eters. angles are in degrees. 5. dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. the pin #1 identifier may be either a mold or mark feature. 7. maximum package warpage is 0.05mm. 8. maximum allowable burrs is 0.076mm in all directions. 9. same as jedec mo-255uabd except: no lead-pull-back, "a" min dimension = 0.45 not 0.50mm "l" max dimension = 0.45 not 0.42mm. 10. for additional information, to assist with the pcb land pattern design effort, see intersil technical brief tb389. 2.00 0.80 1.75 0.25 0.50 0.275 2.50 land pattern 10
10 all intersil u.s. products are manufactured, asse mbled and tested utilizing iso9000 quality systems. intersil corporation?s quality certifications ca n be viewed at www.intersil.com/design/quality intersil products are sold by description only. intersil corpor ation reserves the right to make changes in circuit design, soft ware and/or specifications at any time without notice. accordingly, the reader is cautioned to verify that data sheets are current before placing orders. information furnishe d by intersil is believed to be accurate and reliable. however, no responsibility is assumed by intersil or its subsidiaries for its use; nor for any infringements of paten ts or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of intersil or its subsidiari es. for information regarding intersil corporation and its products, see www.intersil.com fn6588.1 january 21, 2008 ISL23511 small outline plast ic packages (soic) index area e d n 123 -b- 0.25(0.010) c a m bs e -a- l b m -c- a1 a seating plane 0.10(0.004) h x 45 c h 0.25(0.010) b m m notes: 1. symbols are defined in the ?mo series symbol list? in section 2.2 of publication number 95. 2. dimensioning and tolerancing per ansi y14.5m - 1982. 3. dimension ?d? does not include mold flash, protrusions or gate burrs. mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. dimension ?e? does not include in terlead flash or protrusions. inter- lead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 5. the chamfer on the body is optional. if it is not present, a visual index feature must be located within the crosshatched area. 6. ?l? is the length of terminal for soldering to a substrate. 7. ?n? is the number of terminal positions. 8. terminal numbers are shown for reference only. 9. the lead width ?b?, as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. controlling dimension: millimete r. converted inch dimensions are not necessarily exact. m8.15 (jedec ms-012-aa issue c) 8 lead narrow body small outline plastic package symbol inches millimeters notes min max min max a 0.0532 0.0688 1.35 1.75 - a1 0.0040 0.0098 0.10 0.25 - b 0.013 0.020 0.33 0.51 9 c 0.0075 0.0098 0.19 0.25 - d 0.1890 0.1968 4.80 5.00 3 e 0.1497 0.1574 3.80 4.00 4 e 0.050 bsc 1.27 bsc - h 0.2284 0.2440 5.80 6.20 - h 0.0099 0.0196 0.25 0.50 5 l 0.016 0.050 0.40 1.27 6 n8 87 0 8 0 8 - rev. 1 6/05
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