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fn6588 rev 2.00 page 1 of 11 september 9, 2015 fn6588 rev 2.00 september 9, 2015 isl23511 single push button controlled potentiometer (xdcp?) low noise, low power, 32 taps, push button controlled potentiometer datasheet the intersil isl23511 is a thr ee-terminal digitally-controlled potentiometer (xdcp) implem ented by a resistor array composed of 31 resistive ele ments 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 elimin ate redundancy, the wiper position will automatically incre ment or decrement if one of these inputs is hel d 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 a ccessing the resisto r chain naturally configure the isl23511 as a vol tage divider. a rheostat is easily formed by floating an end t erminal 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 ) n o l o n g e r a v a i l a b l e o r s u p p o r t e d 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 isl23511wfru10z-tk (note 2) (no longer available or supported) ga 10 -40 to +125 10 ld tqfn l10.2.1x1.6a *add -tk suffix for tape and reel. please refer to tb347 for details on reel specifications. notes: 1. these intersil pb-free plasti c packaged products employ speci al pb-free material sets; molding compounds/die attach material s and 100% matte tin plate plus anneal - e3 termination finish, which is r ohs compliant and compatible with both snpb and pb-free solderi ng operations. intersil pb-free products are msl classified at pb- free peak reflow temperatures that meet or exceed the pb-free r equirements of ipc/jedec j std-020. 2. these intersil pb-free plasti c packaged products employ speci al pb-free material sets; molding compounds/die attach material s and nipdau plate - e4 termination finish, which is rohs compliant and com patible with both snpb and pb-free soldering operations. inters il pb-free products are msl classified at pb-free peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jedec j st d-020.
isl23511 fn6588 rev 2.00 page 2 of 11 september 9, 2015 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 n o l o n g e r a v a i l a b l e o r s u p p o r t e d pin descriptions soic pin tqfn pin symbol brief description 11pu the pu is a negative-edge triggered inpu t with internal pull-up. togg ling pu will move the wiper close to r h terminal. 22pd the pd is a negative-edge triggered inpu t with internal pull-up. togg ling pd will move the wiper close to r l terminal. 33r h the r h and r l pins of the isl23511 are equivalen t 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 rl references the relative position of the terminal in relation to wiper movement direction selecte d by the pu /pd input. 44v ss ground 56r w the r w pin is the wiper terminal of the potentiometer, which is equiv alent to the movable te rminal of a mechanical potentiometer. 67r l the r h and r l pins of the isl23511 are equivalen t 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 selecte d 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 fn6588 rev 2.00 page 3 of 11 september 9, 2015 absolute maximum ratings 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 temperat ure (plastic package). . . . . . . . +1 50c 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 the rmal conductivity test board in f ree air. see tech brief tb379 for details. 4. for ? jc , the case temp location is the center of the exposed metal p ad on the package underside. potentiometer specifications over recommended operating conditi ons, unless otherwise specifi ed. 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 f or 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 fn6588 rev 2.00 page 4 of 11 september 9, 2015 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 conditi ons, unless otherwise specifi ed. (continued) symbol parameter test conditions min (note 18) typ (note 5) max (note 18) unit dc electrical specifications over recommended operating conditi ons unless otherwise specifie d. 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 conditi ons unless otherwise specifie d. 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 C 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 0 0 hex respectively. lsb is the incremental voltage when changing from one tap to an adjace nt tap. 7. zs error = v(rw) 0 /lsb. 8. fs error = [v(rw) 31 C v cc ]/lsb. 9. dnl = [v(rw) i C v(rw) i-1 ]/lsb -1, for i = 1 to 31; i is the dcp register setting. 10. inl = [v(rw) i C i ? lsb C 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 o ver the temperature range. 12. mi = | rw 31 C rw 0 | /31. mi is a minimum increment. rw 31 and rw 0 are the measured resistances for the dcp register set to 1f he x 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 C rw i-1 )/mi, for i = 1 to 31. 15. rinl = [rw i C (mi ? i) C 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 t ested. 18. parts are 100% tested at +25c. over-temperature limits esta blished by characterization and are not production tested. tc v max v rw ?? i ?? min v rw ?? i ?? C max v rw ?? i ?? min v rw ?? i ?? + ?? 2 ? --------------------------------------------------------------- ------------------------------ - 10 6 +165c -------------------- - ? = ?? min ri ?? C ?? max ri ?? min ri ?? + ?? 2 ? --------------------------------------------------------------- - 10 6 +165c -------------------- - ? =
isl23511 fn6588 rev 2.00 page 5 of 11 september 9, 2015 slow mode timing fast mode timing shutdown mode timing t gap t db mi * v w pu * mi in the ac timing diagram ref ers 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 re fers to the minimum incremental change in the wiper voltage. v w pu pd 2s t db shutdown mode
isl23511 fn6588 rev 2.00 page 6 of 11 september 9, 2015 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 fn6588 rev 2.00 page 7 of 11 september 9, 2015 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 voltage 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 fn6588 rev 2.00 page 8 of 11 september 9, 2015 power-up and power-down requirements there are no restri ctions on the powe r-up or power-down conditions of v cc and the voltages applied to the potentiometer pin s 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 t he potentiomete r 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 logi c level will, af ter a debounce time, move the wiper t o the next adjacent h igher 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 logi c level will, af ter a debounce time, move the wiper t o the next adjacent l ower tap position. device operation there are three sections of the isl23511: the input control, th e counter and decode section and the resistor array. the input control section operates just like an up/down counter. the output of this counter is decode d to turn on a single electroni c switch, connecting a point on th e resistor array to the wiper output. the resistor array is comprised of 31 individual resistors connected in series. a t either end of the array and between each resistor is an elect ronic switch that transfers th e potential at that point to the wiper. the isl23511 is designed to i nterface 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 deco ded 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 int ernal pull-up so that they normally remain high. when pulled low by an external push button switch or a l ogic low level input , the wiper will be switched to the next adjacent tap position. internal debounce circuitry pr events inadvertent switching of the wiper position if pu or pd remain low for less than 15ms, typical. each of the buttons c an be pushed eit her once for a single increment/decrement or continuously for a multiple increments/decrements. the number of increments/decrements of the wiper position depend on how long the button is b eing pushed. when making a continuous push, after the first second, the increment/decrement speed increases. for the first seco nd, the device wil l be in the slow scan mode. then, if t he button is hel d for longer than 1s, the device will go into the fast scan mode. as soon as the button i s released, the isl23511 will re turn 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 fixe d terminal, act s like its mechanical equivalent and does not move bey ond the last position. that is, the counte r does not wrap around when clocked to either extreme. shutdown mode the isl23511 enters into s hutdown mode if both pu and pd inputs are kept low for 2s. in thi s mode, the resi stors array i s 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 bro ught low within t db time window of 15ms (see s hutdown mode timing on page 5) otherwise al l commands will be ignored until both inputs are released. holding either pu or pd input low for mor e than 15ms will exit shutdown mode and retur n wiper to prior shutdown position. if pu or pd will be held low for more than 250ms, the isl23511 will start auto-in crement or auto-decrement of wiper position. r total with v cc removed the end-to-end resistance of the array will fl uctuate once v cc is removed. r l r w r h figure 13. dcp connection in shutdown mode
fn6588 rev 2.00 page 9 of 11 september 9, 2015 isl23511 intersil products are manufactured, assembled and tested utilizing iso9001 quality systems as noted in the quality certifications found at www.intersil.com/en/suppor t/qualandreliability.html intersil products are sold by description on ly. intersil may modify the circuit design an d/or specifications of products at any time without notice, provided that such modification does not, in intersil's sole judgment, affect the form, fit or function of the product. accordingly, the reader is cautioned to verify that datasheets are current before placing orders. information fu rnished by intersil is believed to be accu rate and reliable. however, no responsib ility is assumed by intersil or its subsidiaries for its use; nor for any infrin gements of patents 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 subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com for additional products, see www.intersil.com/en/products.html ? copyright intersil americas llc 2007-2015. all rights reserved. all trademarks and registered trademarks are the property of their respective owners. about intersil intersil corporation is a leading provider of innovative power management and precision analog solutions. the company's produc ts address some of the largest marke ts within the industrial and i nfrastructure, mobile computing and high-end consumer markets. for the most updated datasheet, application no tes, related documentation and related parts, please see the respective product information page found at www.intersil.com . you may report errors or suggesti ons for improving this datashe et by visiting www.intersil.com/ask . reliability reports are also a vailable from our website at www.intersil.com/support. revision history the revision history provided is for informational purposes onl y and is believed to be accurate, but not warranted. please go to the web to make sure that you have the latest revision . date revision change september 9, 2015 fn6588.2 - ordering information table on page 1. - added revision history. - added about intersil verbiage. -updated pod m8.15 to most curren t revision with changes as fol lows: -revision 1 to revision 2 changes: updated to new pod format by removing table and moving dimensio ns onto drawing and adding land pattern -revision 2 to revision 3 changes: changed in typical recommended land pattern the following: 2.41(0.095) to 2.20(0.087) 0.76 (0.030) to 0.60(0.023) 0.200 to 5.20(0.205) -revision 3 to revision 4 changes: changed note 1 "1982" to "1994"
isl23511 fn6588 rev 2.00 page 10 of 11 september 9, 2015 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 mill imeters. angles are in degrees. 5. dimension b applies to the metallized terminal and is measure d between 0.15mm and 0.30mm from the terminal tip. 6. the configuration of the pin #1 identifier is optional, but m ust 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 patt ern design effort, see intersil technical brief tb389. 2.00 0.80 1.75 0.25 0.50 0.275 2.50 land pattern 10
isl23511 fn6588 rev 2.00 page 11 of 11 september 9, 2015 package outline drawing m8.15 8 lead narrow body small outline plastic package rev 4, 1/12 detail "a" top view index area 123 -c- seating plane x 45 notes: 1. dimensioning and tolerancing per ansi y14.5m-1994. 2. package length does not include mold flash, protrusions or ga te burrs. mold flash, protrusion and gate burrs shall not exceed 0.15mm ( 0.006 inch) per side. 3. package width does not include interlead flash or protrusions . interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 4. the chamfer on the body is optional. if it is not present, a visual index feature must be located within the crosshatched area. 5. terminal numbers are s hown for reference only. 6. the lead width as measured 0.36m m (0.014 inch) or greater abo ve the seating plane, shall not exceed a maximum value of 0.61mm (0.02 4 inch). 7. controlling dimension: millimete r. converted inch dimensions a re not necessarily exact. 8. this outline conforms to je dec publication ms-012-aa issue c . side view a side view b 1.27 (0.050) 6.20 (0.244) 5.80 (0.228) 4.00 (0.157) 3.80 (0.150) 0.50 (0.20) 0.25 (0.01) 5.00 (0.197) 4.80 (0.189) 1.75 (0.069) 1.35 (0.053) 0.25(0.010) 0.10(0.004) 0.51(0.020) 0.33(0.013) 8 0 0.25 (0.010) 0.19 (0.008) 1.27 (0.050) 0.40 (0.016) 1.27 (0.050) 5.20(0.205) 1 2 3 4 5 6 7 8 typical recommended land pattern 2.20 (0.087) 0.60 (0.023)

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