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. www.onsemi.com SOT−23 TB SUFFIX CASE 527AK PIN CONFIGURATION UP VCC 1 NC DOWN A B GND W (Top View) 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 kW, 50 kW and 100 kW 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 © Semiconductor Components Industries, LLC, 2016 August, 2016 − Rev. P0 PIN DESCRIPTIONS Pin Name UP Function Step-Up Control DOWN A Step-Down Control Potentiometer High Terminal GND Ground W Wiper Terminal B Potentiometer Low Terminal NC Not Connected VCC Supply Voltage ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 6 of this data sheet. 1 Publication Order Number: N57L5128/D N57L5128 Functional Diagrams VCC A 5−BIT UP/DOWN COUNTER Power On Recall GND ONE OF THIRTY TWO DECODER DOWN 30 W VCC B UP DOWN CONTROL CIRCUITRY UP/DOWN Control A 31 29 28 TRANS− FER GATES W 2 1 GND 0 Figure 1. General RESISTOR ARRAY A UP Figure 2. Detailed B W B Figure 3. Electronic Potentiometer Implementation Pin Description Device Operation 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. Voltage applied to the A terminal cannot exceed the supply voltage, VCC 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, VCC 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. Voltage applied to the B terminal cannot exceed the supply voltage, VCC or go below ground, GND. B and A are electrically interchangeable. 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 (RWB will decrease with 1LSB and RWA 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 (RWB will increase with 1LSB and RWA 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. www.onsemi.com 2 N57L5128 Table 1. OPERATION MODES UP DOWN Operation High to Low High Wiper toward A – RW Increment X Low Wiper does not change High High to Low Wiper toward B – RW Decrement High to Low High to Low Wiper toward B – RW Decrement Low X Wiper does not change High High Wiper does not change A CA RA RW W RB CW CB B Figure 4. Potentiometer Equivalent Circuit Table 2. ABSOLUTE MAXIMUM RATINGS Parameters Ratings Supply Voltage VCC to GND Units V −0.5 to +7 V Inputs UP to GND DOWN to GND A, B, W to GND V −0.5 to VCC +0.5 −0.5 to VCC +0.5 −0.5 to VCC +0.5 −40 to +85 °C Junction Temperature +150 °C Storage Temperature Operating Ambient Temperature Industrial (‘I’ suffix) −65 to 150 °C Lead Soldering (10 seconds max) +300 °C Thermal Resistance qJA 230 °C/W Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality should not be assumed, damage may occur and reliability may be affected. Table 3. DC ELECTRICAL CHARACTERISTICS (VCC = +2.5 V to +5.5 V unless otherwise specified) Parameter Symbol Conditions Min Typ Max Units 2.5 – 5.5 V VCC = 5.5 V, f = 1 MHz, IW = 0 – – 100 mA VCC = 5.5 V, f = 250 kHz, IW = 0 – – 50 mA UP, DOWN = VCC or GND – − 2 mA POWER SUPPLY VCC Operating Voltage Range ICC1 Supply Current (Increment) ISB1 (Note 1) Supply Current (Standby) 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. www.onsemi.com 3 N57L5128 Table 4. LOGIC INPUTS (VCC = +2.5 V to +5.5 V unless otherwise specified) Parameter Symbol Conditions Min Typ Max Units IIH Input Leakage Current VIN = VCC − – 10 mA IIL Input Leakage Current VIN = 0 V – – −10 mA 4.5 V ≤ VCC ≤ 5.5 V 2 – VCC V 0 – 0.8 V 2.5 V ≤ VCC ≤ 5.5 V VCC x 0.7 – VCC + 0.3 V −0.3 – VCC x 0.2 V Max Units VIH1 TTL High Level Input Voltage VIL1 TTL Low Level Input Voltage VIH2 CMOS High Level Input Voltage VIL2 CMOS Low Level Input Voltage Table 5. POTENTIOMETER CHARACTERISTICS (VCC = +2.5 V to +5.5 V unless otherwise specified) Parameter Symbol RPOT Conditions Potentiometer Resistance Min Typ (Note 2) −10 Device 10 −50 Device 50 −00 Device 100 Pot. Resistance Tolerance kW ±20 % VA Voltage on A pin 0 VCC V VB Voltage on B pin 0 VCC V Resolution 3.2 % INL Integral Linearity Error IW ≤ 2 mA −0.5 0.1 0.5 LSB DNL Differential Linearity Error IW ≤ 2 mA −0.25 0.05 0.25 LSB RWI Wiper Resistance IW VCC = 5 V, IW = 1 mA 70 VCC = 2.5 V, IW = 1 mA 150 W 300 W 1 mA Wiper Current (Note 3) TCRPOT TC of Pot Resistance (Note 4) 50 TCRATIO Ratiometric TC (Note 4) 5 100 kHz / 1 kHz 8/24 nV/√Hz (Note 4) 8/8/25 pF Passive Attenuator, 10 kW 1.7 MHz VN (Note 4) Noise CA/CB/CW Potentiometer Capacitances fc (Note 4) Frequency Response 2. Typical values are for TA = 25°C and nominal supply voltage. 3. IW = source or sink. 4. These parameters are periodically sampled and are not production tested. Table 6. AC CONDITIONS OF TEST VCC Range 2.5 V ≤ VCC ≤ 5.5 V Input Pulse Levels 0.2 VCC to 0.7 VCC Input Rise and Fall Times 10 ns Input Reference Levels 0.5 VCC www.onsemi.com 4 ppm/°C 20 ppm/°C N57L5128 Table 7. AC OPERATING CHARACTERISTICS (VCC = +2.5 V to +5.5 V, VH = VCC, VL = 0 V, unless othewise specified) Parameter Min Typ (Note 5) Max Units UP LOW Period 450 – – ns DOWN LOW Period 450 – – ns UP Cycle Time 1 – – ms DOWN Cycle Time 1 – – ms UP Rise and Fall Time – – 500 ns DOWN Rise and Fall Time – – 500 ns UP Settling Time 550 – – ns tDOWN_SET DOWN Settling Time 550 – – ns tPU (Note 6) Power−up to Wiper Stable – – 1 ms Symbol tUP tDOWN tUP_CYC tDOWN_CYC tUP_R, tUP_F (Note 6) tDOWN_R, tDOWN_F (Note 6) tUP_SET 5. Typical values are for TA = 25°C and nominal supply voltage. 6. This parameter is periodically sampled and not 100% tested. Interface Timing Diagrams tUP_CYC tUP_R tUP tUP_F 90% 90% UP 10% 10% MI (Note 7) tUP_SET RW Figure 5. Increment RW in Discrete Steps tDOWN_CYC tDOWN tDOWN_R DOWN tDOWN_F 90% 90% 10% 10% tDOWN_SET MI (Note 7) RW Figure 6. Decrement RW in Discrete Steps 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. www.onsemi.com 5 N57L5128 Table 8. ORDERING INFORMATION Orderable Part Number Resistance (kW) N57L5128TBD10TG 10 N57L5128TBD50TG 50 N57L5128TBD00TG (Note 12) 100 Lead Finish Package Shipping† NiPdAu SOT−23−8 (Pb-Free) 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. 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. www.onsemi.com 6 N57L5128 PACKAGE DIMENSIONS SOT−23, 8 Lead CASE 527AK ISSUE A SYMBOL E1 e E b MIN A 0.90 1.45 0.00 0.15 A2 0.90 1.10 1.30 A3 0.60 0.80 b 0.28 0.38 c 0.08 0.22 D 2.90 BSC E 2.80 BSC E1 1.60 BSC 0.65 BSC L TOP VIEW MAX A1 e PIN #1 IDENTIFICATION NOM 0.45 0.30 0.60 L1 0.60 REF L2 0.25 REF θ 0° 8° D A2 A q A3 c L1 A1 SIDE VIEW L L2 END VIEW Notes: (1) All dimensions in millimeters. Angles in degrees. (2) Complies with JEDEC standard MO-178. ON Semiconductor and are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in 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 ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations 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 different applications and actual performance may vary over time. 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