? semiconductor components industries, llc, 2016 august, 2016 ? rev. p0 1 publication order number: n57l5128/d n57l5128 32\tap digital up/down control potentiometer (pot) description the n57l5128 is a single digital pot designed as an electronic replacement for mechanical potentiometers and trim pots. ideal for automated adjustments on high volume production lines, they are also well suited for applications where equipment requiring periodic adjustment is either difficult to access or located in a hazardous or remote environment. the n57l5128 contains a 32-tap series resistor array connected between two terminals a and b. an up/down counter and decoder that are controlled by two input pins, determines which tap is connected to the wiper, w. wiper-control of the n57l5128 is accomplished with two input control pins, up and down . a high-to-low transition on the up input increments the wiper position and a high-to-low transition on the down input decrements the wiper position. the tap position is not stored in memory. the wiper is always set to the mid point, tap 15 at power up. the digital pot can be used as a three-terminal resistive divider or as a two-terminal variable resistor. digital potentiometers bring variability and programmability to a wide variety of applications including control, parameter adjustments, and signal processing. features ? 32-position linear taper potentiometer ? low power cmos technology ? single supply operation: 2.5 v ? 5.5 v ? discrete step-up/step-down digital control ? resistance values: 10 k , 50 k and 100 k ? available in sot?23 8-lead package ? these devices are pb-free, halogen free/bfr free and are rohs compliant applications ? automated product calibration ? remote control adjustments ? offset, gain and zero control ? tamper-proof calibrations ? contrast, brightness and volume controls ? motor controls and feedback systems ? programmable analog functions www. onsemi.com see detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. ordering information sot?23 tb suffix case 527ak step-up control up step-down control down potentiometer high terminal a ground gnd wiper terminal w potentiometer low terminal b function pin name pin descriptions not connected nc supply voltage v cc pin configuration w b nc v cc gnd a down up 1 (top view)
n57l5128 www. onsemi.com 2 functional diagrams figure 1. general a b up/down control power on a b gnd w w one of thirty two decoder 31 30 29 28 2 1 0 trans? gates resistor array control circuitry 5?bit up/down counter gnd a w b figure 2. detailed figure 3. electronic potentiometer implementation recall down v cc up down up v cc fer pin description up : step-up control input when down input is high, a high-to-low transition on up input will cause the wiper to move one increment toward the a terminal. down : step-down control input a high-to-low transition on down input will cause the wiper to move one increment towards the b terminal. a: high end potentiometer terminal a is the high end terminal of the potentiometer. it is not required that this terminal be connected to a potential greater than the b terminal. v oltage applied to the a terminal cannot exceed the supply voltage, v cc or go below ground, gnd. w: wiper potentiometer terminal w is the wiper terminal of the potentiometer. its position on the resistor array is controlled by the control inputs, up and down . voltage applied to the w terminal cannot exceed the supply voltage, v cc or go below ground, gnd. b: low end potentiometer terminal b is the low end terminal of the potentiometer. it is not required that this terminal be connected to a potential less than the a terminal. v oltage applied to the b terminal cannot exceed the supply voltage, v cc or go below ground, gnd. b and a are electrically interchangeable. device operation the n57l5128 operates like a digitally controlled potentiometer with a and b equivalent to the high and low terminals and w equivalent to the mechanical potentiometer?s wiper. there are 32 available tap positions including the resistor end points, a and b. there are 31 resistor elements connected in series between the a and b terminals. the wiper terminal is connected to one of the 32 taps and controlled by two inputs, up and down . these inputs control a five-bit up/down counter whose output is decoded to select the wiper position. a high-to-low transition on down input will decrement one step the wiper position (r wb will decrease with 1lsb and r wa will increase with 1lsb). if and only if down input is high, a high-to-low transition on up input will increment one step the wiper position (r wb will increase with 1lsb and r wa will decrease with 1lsb). the wiper, when at either fixed terminal, acts like its mechanical equivalent and does not move beyond the last position. when the n57l5128 is powered-down, the wiper position is reset. when power is restored, the counter is set to the mid point, tap 15.
n57l5128 www. onsemi.com 3 table 1. operation modes up down operation high to low high wiper toward a ? r w increment x low wiper does not change high high to low wiper toward b ? r w decrement high to low high to low wiper toward b ? r w decrement low x wiper does not change high high wiper does not change a w b figure 4. potentiometer equivalent circuit r b r a r w c w c b c a table 2. absolute maximum ratings parameters ratings units supply voltage v cc to gnd ?0.5 to +7 v v inputs up to gnd down to gnd a, b, w to gnd ?0.5 to v cc +0.5 ?0.5 to v cc +0.5 ?0.5 to v cc +0.5 v operating ambient temperature industrial (?i? suffix) ?40 to +85 c junction temperature +150 c storage temperature ?65 to 150 c lead soldering (10 seconds max) +300 c thermal resistance ja 230 c/w 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. table 3. dc electrical characteristics (v cc = +2.5 v to +5.5 v unless otherwise specified) symbol parameter conditions min typ max units power supply v cc operating voltage range 2.5 ? 5.5 v i cc1 supply current (increment) v cc = 5.5 v, f = 1 mhz, i w = 0 ? ? 100 a v cc = 5.5 v, f = 250 khz, i w = 0 ? ? 50 a i sb1 (note 1) supply current (standby) up , down = v cc or gnd ? ? 2 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. 1. these parameters are periodically sampled and are not production tested.
n57l5128 www. onsemi.com 4 table 4. logic inputs (v cc = +2.5 v to +5.5 v unless otherwise specified) symbol parameter conditions min typ max units i ih input leakage current v in = v cc ? ? 10 a i il input leakage current v in = 0 v ? ? ?10 a v ih1 ttl high level input voltage 4.5 v v cc 5.5 v 2 ? v cc v v il1 ttl low level input voltage 0 ? 0.8 v v ih2 cmos high level input voltage 2.5 v v cc 5.5 v v cc x 0.7 ? v cc + 0.3 v v il2 cmos low level input voltage ?0.3 ? v cc x 0.2 v table 5. potentiometer characteristics (v cc = +2.5 v to +5.5 v unless otherwise specified) symbol parameter conditions min typ (note 2) max units r pot potentiometer resistance ?10 device 10 k ?50 device 50 ?00 device 100 pot. resistance tolerance 20 % v a voltage on a pin 0 v cc v v b voltage on b pin 0 v cc v resolution 3.2 % inl integral linearity error i w 2 a ?0.5 0.1 0.5 lsb dnl differential linearity error i w 2 a ?0.25 0.05 0.25 lsb r wi wiper resistance v cc = 5 v, i w = 1 ma 70 v cc = 2.5 v, i w = 1 ma 150 300 i w wiper current (note 3) 1 ma tc rpot tc of pot resistance (note 4) 50 ppm/ c tc ratio ratiometric tc (note 4) 5 20 ppm/ c v n (note 4) noise 100 khz / 1 khz 8/24 nv/ hz c a /c b /c w potentiometer capacitances (note 4) 8/8/25 pf fc (note 4) frequency response passive attenuator, 10 k 1.7 mhz 2. typical values are for t a = 25 c and nominal supply voltage. 3. i w = source or sink. 4. these parameters are periodically sampled and are not production tested. table 6. ac conditions of test v cc range 2.5 v v cc 5.5 v input pulse levels 0.2 v cc to 0.7 v cc input rise and fall times 10 ns input reference levels 0.5 v cc
n57l5128 www. onsemi.com 5 table 7. ac operating characteristics (v cc = +2.5 v to +5.5 v, v h = v cc , v l = 0 v, unless othewise specified) symbol parameter min typ (note 5) max units t up up low period 450 ? ? ns t down down low period 450 ? ? ns t up_cyc up cycle time 1 ? ? s t down_cyc down cycle time 1 ? ? s t up_r, t up_f (note 6) up rise and fall time ? ? 500 ns t down_r, t down_f (note 6) down rise and fall time ? ? 500 ns t up_set up settling time 550 ? ? ns t down_set down settling time 550 ? ? ns t pu (note 6) power?up to wiper stable ? ? 1 ms 5. typical values are for t a = 25 c and nominal supply voltage. 6. this parameter is periodically sampled and not 100% tested. interface timing diagrams figure 5. increment r w in discrete steps 10% 10% 90% 90% mi (note 7) t up_f t up_r t up t up_cyc t up_set r w up figure 6. decrement r w in discrete steps 10% 10% 90% 90% down mi (note 7) t down_f t down_r t down_cyc t down t down_set r w 7. mi in the a.c. timing diagram refers to the minimum incremental change in the w output due to a change in the wiper position.
n57l5128 www. onsemi.com 6 table 8. ordering information orderable part number resistance (k ) lead finish package shipping ? n57l5128tbd10tg 10 nipdau sot?23?8 (pb-free) 3000 / tape & reel n57l5128tbd50tg 50 N57L5128TBD00TG (note 12) 100 ?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. 8. 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 . 9. all packages are rohs-compliant (pb-free, halogen-free). 10. the standard lead finish is nipdau. 11. for additional package and temperature options, please contact your nearest on semiconductor sales office. 12. contact factory for availability.
n57l5128 www. onsemi.com 7 package dimensions sot?23, 8 lead case 527ak issue a notes: (1) all dimensions in millimeters. angles in degrees. (2) complies with jedec standard mo-178. symbol e e1 a2 a3 a1 eb d c a top view side view end view l1 l2 l pin #1 identification min nom max a a1 a2 b c d e e1 l l2 0.00 0.90 0.28 0.08 2.90 bsc 1.60 bsc 0.45 1.45 0.15 1.30 0.38 0.22 0.25 ref 1.10 2.80 bsc l1 0.60 ref e 0.30 0.60 0.65 bsc 0.90 0 8 a3 0.60 0.80 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. 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 n57l5128/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
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