DIGITAL POTENTIOMETERS DP 7114

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1 DP FEATURES -position, linear-curved potentiometer Nonvolatile memory wiper storage Low-power CMOS technology Single-power operation:. V ~.0 V Increment up/down serial interface Total resistance: 0 kω, 0 kω, 00 kω SOIC, TSSOP, MSOP and TDFN packages APPLICATIONS Auto calibration Remote control adjustment Offset, gain and zero controls Rewritable calibration Contrast, brightness and volume controls Motor-controlled, feedback system Programmable analog function

2 DP SUMMARY The DP is a programmable digital potentiometer designed to replace mechanical potentiometers and variable resistors. Automated adjustment by product automation line is ideal. The DP makes this possible and is suitable for applicatio where it is difficult to operate when machines require cotant adjustment or in case of danger or at remote locatio. The DP has a -tap resistance array between two terminals, and. The up/down counter and decoder controlled by input terminals determines the tap connected to wiper resistance. Wiper settings stored in nonvolatile memory can not be lost even at power shutoff and will be automatically restored when power retur. Not affected by stored settings, the wiper can test new setting of the system. The wiper control of the DP is made by three input terminals,, and. The input increments wiper to direction determined in input logic condition. The input terminal is for device-select use and used when wiper position is stored before power shutoff. The digital potentiometer can be used as a voltage partial pressure device or -terminal variable resistor. The DP offers valuable capabilities and programmability to a wide variety of applicatio such as parameter adjustment and signal processing. CONFIGURATION VH/ Vcc (Supply Voltage) -BIT UP/DOWN COUNTER 0 /VH UP/DOWN () REMENT () DEVICE SELECT () Control and Memory POR /VH /VW /VL Vcc Vss -BIT NONVOLATILE MEMORY STORE AND RECALL CONTROL CIRCUITRY 9 ONE OF THIRTY TWO DECODER 0 TRANSFER GATES RESISTOR ARRAY /VL /VW VW/ VL/ Circuit block diagram CONTACT LAYOUT SOIC (V) TDFN (VP) TSSOP (Y) MSOP (Z)

3 DP TERMINAL FUNCTIONS Terminal name Increment control input Up/Down control input Functio High-end potentiometer terminal Ground Wiper terminal Low-end potentiometer terminal Chip select Power voltage FUNCTIONS OF EACH TERMINAL : Increment control input This input moves wiper to the up and down direction selected by conditio of input at the VIL edge. : Up/down control input input controls moving direction of wiper. When is in H state and is in L state, this input moves the wiper to from traition state of H - L of the. When and are in L state, it moves the wiper to direction in the traition of H to L of the. : High-end potentiometer terminal is a high-end potentiometer terminal. This terminal does not require higher voltage than terminal. But, voltage should not be over nor under. : Wiper terminal is a wiper terminal of potentiometer. The position within resistance arrays are controlled by control input terminals of, and. OPERATION EXPLANATION The and terminals of the DP are equivalent to high and low terminals of mechanical potentiometers. The DP is a digital potentiometer of which terminal operates as a wiper. The model has taps including terminators of and. There are resistance arrays linearly connected between terminal and. This wiper terminal is connected to one of taps and controlled by inputs of, and. This input controls the -bit up/down counter which can decode to select wiper position. Selected wiper position data is stored into nonvolatile memories by and inputs. When is in the L state, DP is selected and responds to and inputs. In traition from H of to L, wiper will be incremented or decremented. The wipe acts like mechanical and does not move from the last position. Counter values will be saved in nonvolatile memories by traition from H of the input to H of the. When DP power is shut down, counter position saved in the last will be kept in nonvolatile memories. When DP power retur, contents within memories will be renewed and counter values are set on the counter. When is in L state, DP will not be selected and shut down without saving the current wiper position in nonvolatile memories, thereby the system will recall preset values always stored in nonvolatile memories. OPERATION MODE Operation : Low-end potentiometer terminal is a low-end potentiometer terminal. This terminal does not need to connect lower voltage than terminal. But, voltage should not be over nor under. and can be changed electrically. C H R H R wi C W R W : Chip select Chip select input is used to make a DP control input effective and becomes effective in the L state. When is in the H state, inputs of and does not give effect or change to wiper position. C L R L Equivalent circuit of potentiometer

4 DP ABSOLUTE MAXIMUM RATINGS Supply voltage + Inputs * Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. Absolute Maximum Ratings are limited values applied individually while other parameters are within specified operating conditio, and functional operation at any of these conditio is NOT implied. Device performance and reliability may be impaired by exposure to absolute rating conditio for extended periods of time. RELIABILITY CHARACTRISTI Symbol Parameter Conditio Min Typ Max Units VZAP () ESD Susceptibility MIL-STD-, Test Method Volts ILTH ()() Latch-Up JEDEC Standard 00 ma TDR Data Retention MIL-STD-, Test Method Years NEND Endurance MIL-STD-, Test Method 00,000,000 Stores DC ELECTRICAL CHARACTERISTI Unless otherwise specified, the specs are defined at Vcc = +. V to +.0 V. Power supply Symbol Parameter Conditio Min Typ Max Units Operating Voltage Range..0 V ICC ICC ISB () Logic inputs Supply Current (Increment) Supply Current (Write) Supply Current (Standby) = V, f = MHz, IW = 0 = V, f = 0 khz, IW = 0 Programming, = V = V = Vcc 0. V, = Vcc 0. V or Symbol Parameter Conditio Min Typ Max Units Notes : () This parameter is tested initially and after a design or process change that affects the parameter. () Latch-up protection is provided for stresses up to 00 ma on address and data pi from V to Vcc + V. () Iw = source or sink current. () The value is for reference µa ma µa µa IIH Input Leakage Current VIN = 0 µa IIL Input Leakage Current VIN = 0 V 0 µa CMOS High Level input Voltage Vcc V. V V CMOS Low Level input Voltage V VIH VIL

5 DP POTENTIOMETER PARAMETERS Symbol Parameter Conditio Min Typ Max Units RPOT Potentiometer Resistance 0 Device 0 Device 00 Device kω ±0 % RTOL Pot Resistance Tolerance V Voltage on pin 0 V V Voltage on pin 0 V RES Resolution % INL Integral Linearity Error IW µa LSB DNL Differential Linearity Error IW µa LSB I Wiper Resistance = V, IW = ma 0 00 Ω =. V, IW = ma 0 00 kω IWI Wiper Current.. ma TCRPOT TC of Pot Resistance 00 ppm/ C TCRATIO Ratiometric TC 0 ppm/ C VN Noise 00 khz / khz / nv/ Hz CH/CL/CW Potentiometer Capacitances // pf fc Frequency Respoe Passive Attenuator, 0 kω. MHz AC TEST CONDITIONS AC TIMING DIAGRAM tci tcyc til tih tdi tid tic (store) tf 90 % 0 % 90 % tr tiw MI () () The value is measured at temperature C and at the above defined power supply voltage. () The value is for reference. () MI shows minimum change unit of wiper output by changing wiper position. AC ELECTRICAL CHARACTERISTI Symbol Parameter Min Typ Max Units tci to Setup 00 tdi tid til tih tic tiw tcyc tr, tf () tpu () twr to Setup to Hold LOW Period HIGH Period Inactive to Inactive Deselect Time (NO STORE) Deselect Time (STORE) to VOUT Change Cycle Time Input Rise and Fall Time Power-up to Wiper Stable Store Cycle