? semiconductor components industries, llc, 2016 august, 2016 ? rev. p0 1 publication order number: N57L5125/d N57L5125 product preview 32\tap digital potentiometers (pots) with 2\wire interface description N57L5125 linear-taper digital pots perform the same function as a mechanical potentiometer or a variable resistor. this device consists of a fixed resistor and a wiper contact with 32-tap points that are digitally controlled through a 2-wire up/down serial interface. the N57L5125 is configured as a potentiometer. three resistance values are available: 10 k , 50 k and 100 k . all devices are available in a space-saving 6-pin sot?23 package. features ? 0.3 a ultra-low standby current ? single-supply operation: 2.7 v to 5.5 v ? glitchless switching between resistor taps ? power-on reset to midscale ? 2-wire up/down serial interface ? resistance values: 10 k , 50 k and 100 k ? low wiper resistance: 80 ? these devices are pb-free, halogen free/bfr free and are rohs compliant applications ? lcd screen adjustment ? volume control ? mechanical potentiometer replacement ? gain adjustment ? line impedance matching this document contains information on a product under development. on semiconductor reserves the right to change or discontinue this product without notice. www. onsemi.com pin connections (top view) sot?23 tb suffix case 527aj see detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. ordering information gnd 1 6h 2 3 4 w 5 N57L5125 sot?23 u/d v dd cs marking diagram 1 xxx m xxx = specific device code m = date code = pb?free package (note: microdot may be in either location)
N57L5125 www. onsemi.com 2 32?position decoder up?down counter gnd h gnd w figure 1. functional diagram u/d cs v dd table 1. pin descriptions pin num- ber pin name description 1 v dd power supply 2 gnd ground 3 u/d up/down control input. with cs low, a low-to-high transition increments or decrements the wiper position. 4 cs chip select input. a high-to-low cs transition determines the mode: increment if u/d is high, or decrement if u/d is low. 5 w wiper terminal of resistor 6 h high terminal of resistor table 2. absolute maximum ratings parameters ratings units v dd to gnd ?0.3 to +6 v all other pins to gnd ?0.3 to (v dd + 0.3) v input and output latch?up immunity 200 ma maximum continuous current into h, l and w 100 k 50 k 10 k 0.6 1.3 1.3 ma continuous power dissipation (t a = +70 c) 6-pin sc?70 (note 1) 245 mw operating temperature range ?40 to +85 c junction temperature +150 c storage temperature range ?65 to +150 c soldering temperature (soldering, 10 sec) +300 c stresses exceeding those listed in the maximum ratings table may damage the device. if any of these limits are exceeded, device function ality should not be assumed, damage may occur and reliability may be affected. 1. derate 3.1 mw/ c above t a = +70 c
N57L5125 www. onsemi.com 3 table 3. electrical characteristics (v dd = 2.7 v to 5.5 v, v h = v dd , v l = 0, t a = ?40 c to +85 c. typical values are at v dd = 2.7 v, t a = 25 c, unless otherwise noted.) parameter symbol conditions min typ max units dc performance resolution 32 taps end-to-end resistance (?00) 80 100 120 k end-to-end resistance (?50) 40 50 60 end-to-end resistance (?10) 8 10 12 end-to-end resistance tempco tc r 30 300 ppm/ c ratiometric resistance tempco 5 ppm/ c integral nonlinearity inl 0.5 lsb differential nonlinearity dnl 0.5 lsb full-scale error 0.1 lsb zero-scale error 1 lsb wiper resistance r w 80 200 digital inputs input high voltage v ih 0.7 x v dd v input low voltage v il 0.3 x v dd v timing characteristics (figures 5, 6) u/d mode to cs setup t cu 25 ns cs to u/d step setup t ci 50 ns cs to u/d step hold t ic 25 ns u/d step low period t il 25 ns u/d step high period t ih 25 ns up/down toggle rate (note 2) f toggle 1 mhz output settling time (note 3) t settle 100 k variable resistor configuration, c l = 10 pf 1 s 100 k potentiometer configuration, c l = 10 pf 0.25 power supply supply voltage v dd 2.7 5.5 v active supply current (note 4) i dd 35 a standby supply current (note 5) i sb v dd = +5 v 0.3 1 a product parametric performance is indicated in the electrical characteristics for the listed test conditions, unless otherwise noted. product performance may not be indicated by the electrical characteristics if operated under different conditions. 2. up/down toggle rate: f toggle = 1 / t settle 3. typical settling times are dependent on end-to-end resistance. 4. supply current measureed while changing wiper tap, f toggle = 500 khz. 5. supply current measureed while wiper position is fixed.
N57L5125 www. onsemi.com 4 typical operating characteristics (t a = 25 c, unless otherwise noted.) figure 2. w-to-gnd resistance vs. tap position figure 3. supply current vs. temperature tap position temperature ( c) 29 25 21 17 13 9 5 1 0 20 40 60 80 100 120 150 100 50 0 ?50 0 0.05 0.15 0.20 0.25 0.30 0.40 0.45 figure 4. tap-to-tap switching transient resistance (k ) current ( a) 31 27 23 19 15 11 7 3 100 k 50 k 10 k 0.10 0.35 v dd = 2.7 v v dd = 5.5 v 200 ns/div u/d 2 v/div wiper output 100 mv/div
N57L5125 www. onsemi.com 5 functional description the N57L5125 consists of a fixed resistor and a wiper contact with 32?tap points that are digitally controlled through a 2-wire up/down serial interface. three end-to-end resistance values are available: 10 k , 50 k and 100 k . the N57L5125 is designed to operate as a potentiometer. in this configuration, the low terminal of the resistor array is connected to ground (pin 2). digital interface operation the devices have two modes of operation when the serial interface is active: increment and decrement mode. the serial interface is only active when cs is low. the cs and u/d inputs control the position of the wiper along the resistor array. when cs transitions from high to low, the part will go into increment mode if u/d input is high, and into decrement mode when u/d input is low. once the mode is set, the device will remain in that mode until cs goes high again. a low-to-high transition at the u/d pin will increment or decrement the wiper position depending on the current mode (figures 5 and 6). when the cs input transitions to high (serial interface inactive), the value of the counter is stored and the wiper position is maintained. note that when the wiper reaches the maximum (or minimum) tap position, the wiper will not wrap around to the minimum (or maximum) position. power-on reset all parts in this family feature power-on reset (por) circuitry that sets the wiper position to midscale at power-up. by default, the chip is in the increment mode. figure 5. serial interface timing diagram, increment mode w u/d cs t cu t ci t il t ih t settle t settle t ic note: ?w? is not a digital signal. it represents wiper transitions. figure 6. serial interface timing diagram, decrement mode w note: ?w? is not a digital signal. it represents wiper transitions. t settle t ci t cu u/d cs t ih t il t settle t ic
N57L5125 www. onsemi.com 6 applications information the devices are intended for circuits requiring digitally controlled adjustable resistance, such as lcd contrast control, where voltage biasing adjusts the display contrast. alternative positive lcd bias control an op amp can be used to provide buffering and gain on the output of the N57L5125. this can be done by connecting the wiper output to the positive input of a noninverting op amp as shown in figure 7. adjustable gain figure 8 shows how to use a potentiometer to digitally adjust the gain of a noninverting op amp configuration, by connecting the devices in series with a resistor to ground. the devices have a low 5 ppm/ c ratiometric tempco that allows for a very stable adjustable gain configuration over temperature. 30 v w h +5 v N57L5125 h w N57L5125 figure 7. positive lcd bias control figure 8. adjustable gain circuit v out v in v cc v out
N57L5125 www. onsemi.com 7 table 4. ordering information device orderable part number resistor [k ] pin package shipping ? N57L5125 N57L5125tbd10tg 10 sot23?6 3000 / tape & reel N57L5125tbd50tg (note 7) 50 sot23?6 3000 / tape & reel N57L5125tbd00tg (note 7) 100 sot23?6 3000 / tape & reel ?for information on tape and reel specifications, including part orientation and tape sizes, please refer to our tape and reel packaging specifications brochure, brd8011/d. 6. for detailed information and a breakdown of device nomenclature and numbering systems, please see the on semiconductor device nomenclature document, tnd310/d, available at www.onsemi.com . 7. contact factory for availability. 8. all packages are rohs-compliant (pb-free, halogen-free). 9. the standard finish is nipdau. 10. for additional package and temperature options, please contact your nearest on semiconductor sales office.
N57L5125 www. onsemi.com 8 package dimensions sot?23, 6 lead case 527aj issue b d a1 5 12 detail a l e1 b a detail a c dim min max millimeters a1 0.00 0.15 a2 0.90 1.30 b 0.20 0.50 c 0.08 0.26 d 2.70 3.00 e 2.50 3.10 e1 1.30 1.80 e 0.95 bsc l2 0.25 bsc l notes: 1. dimensioning and tolerancing per asme y14.5m, 1994. 2. controlling dimension: millimeters. 3. datum c is the seating plane. 0.20 0.60 a --- 1.45 3 64 e a2 side view top view end view a s a m 0.20 6x seating plane b c s b e *for additional information on our pb?free strategy and soldering details, please download the on semiconductor soldering and mounting techniques reference manual, solderrm/d. soldering footprint* 3.30 0.95 0.85 6x dimensions: millimeters 0.56 pitch 6x recommended 0.10 c c 6x seating plane l2 gage plane p ublication ordering information n. american technical support : 800?282?9855 toll free usa/canada europe, middle east and africa technical support: phone: 421 33 790 2910 japan customer focus center phone: 81?3?5817?1050 N57L5125/d literature fulfillment : literature distribution center for on semiconductor 19521 e. 32nd pkwy, aurora, colorado 80011 usa phone : 303?675?2175 or 800?344?3860 toll free usa/canada fax : 303?675?2176 or 800?344?3867 toll free usa/canada email : orderlit@onsemi.com on semiconductor website : www.onsemi.com order literature : http://www.onsemi.com/orderlit for additional information, please contact your loc al sales representative on semiconductor and are trademarks of semiconductor components industries, llc dba on semiconductor or its subsidiaries i n the united states and/or other countries. on semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property . a listing of on semiconductor?s product/patent coverage may be accessed at www.onsemi.com/site/pdf/patent?marking.pdf . on semiconductor reserves the right to make changes without further notice to any products herein. on semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does o n semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including wi thout limitation special, consequential or incidental damages. buyer is responsible for its products and applications using on semiconductor products, including compliance with all laws, reg ulations and safety requirements or standards, regardless of any support or applications information provided by on semiconductor. ?typical? parameters which may be provided in on semiconductor data sheets and/or specifications can and do vary in dif ferent applications and actual performance may vary over time. all operating parameters, including ?typic als? must be validated for each customer application by customer?s technical experts. on semiconductor does not convey any license under its patent rights nor the right s of others. on semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any fda class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. should buyer purchase or use on semicondu ctor products for any such unintended or unauthorized application, buyer shall indemnify and hold on semiconductor and its officers, employees, subsidiaries, affiliates, and distrib utors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that on semiconductor was negligent regarding the design or manufacture of the part. on semiconductor is an equal opportunity/affirmative action employer. this literature is subject to all applicable copyright laws and is not for resale in any manner.
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