MAX5160/MAX5161 19-1435 Rev 2a 2/01 Low-Power Digital Potentiometers General Description Features The MAX5160/MAX5161 linear-taper digital potentiome- 32 Tap Positions ters perform the same function as a mechanical poten- 50k , 100k , and 200k Resistance Values tiometer or a variable resistor. They consist of a fixed resistor and a wiper contact with 32 tap points that are 400 Wiper Resistance digitally controlled by three lines for the 8-pin MAX5160 25% Resistance Tolerance or by two lines for the 6-pin MAX5161. 3-Wire Serial Data Input These parts are ideal for applications requiring digitally controlled resistors. Three resistance values are avail- 1LSB DNL able for each part type: 50k , 100k , and 200k . A nominal resistor temperature coefficient of 50ppm/C 0.5LSB INL end-to-end and only 5ppm/C ratiometric makes the 100nA Supply Current MAX5160 ideal for applications requiring a low-temper- ature-coefficient variable resistor, such as low-tempco, +2.7V to +5.5V Single-Supply Operation adjustable-gain circuit configurations. Power-On Reset: Wiper Goes to Midscale The MAX5160 is available in an 8-pin MAX package, (position 16) and the MAX5161 is available in a 6-pin SOT23 pack- 2kV ESD Protection age. Both devices are guaranteed over the extended- industrial temperature range (-40C to +85C). Small-Footprint Packages Applications 6-Pin SOT23 (MAX5161) 8-Pin MAX (MAX5160) LCD Screen Adjustment Glitchless Switching Between the Resistor Taps Volume Control Mechanical Potentiometer Replacement Ordering Information PIN- R Selector Guide PART TEMP. RANGE PACKAGE (k ) TOP R MAX5160NEUA -40C to +85C 8 MAX 200 PART MARK (k ) MAX5160MEUA -40C to +85C 8 MAX 100 MAX5160NEUA 200 MAX5160LEUA -40C to +85C 8 MAX 50 MAX5160MEUA 100 MAX5161NEZT -40C to +85C 6 SOT23 200 MAX5160LEUA 50 MAX5161MEZT -40C to +85C 6 SOT23 100 MAX5161NEZT AAAC 200 MAX5161LEZT -40C to +85C 6 SOT23 50 MAX5161MEZT AAAB 100 MAX5161LEZT AAAA 50 Functional Diagram H Pin Configurations V DD TOP VIEW MAX5160 GND MAX5161 L16 V DD INC 1 8 V DD CS U/D 2 7 CS MAX5161 UP/DN POSITION INC W MAX5160 H 2 5 INC COUNTER DECODER H 3 6 L U/D GND 4 5 W GND34 U/D MAX L SOT23-6 Maxim Integrated Products 1 For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Low-Power Digital Potentiometers ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +6V Continuous Power Dissipation (T = +70C) DD A CS, INC, U/D to GND ...............................................-0.3V to +6V 6-Pin SOT23 (derate 6.25mW/C above +70C)...........500mW H, L, W to GND.......................................... -0.3V to (V + 0.3V) 8-Pin MAX (derate 4.1mW/C above +70C) ..............330mW DD Input and Output Latchup Immunity ..............................200mA Operating Temperature Range .......................... -40C to +85C Maximum Continuous Current into H, L, and W Storage Temperature Range .............................-65C to +150C MAX516 E ...............................................................1mA Lead Temperature (soldering, 10s) ................................+300 C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = +2.7V to +5.5V, V = V , V = 0, T = T to T . Typical values are at V = +5V, T = +25C, unless otherwise noted.) DD H DD L A MIN MAX DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DC PERFORMANCE Resolution 3 % Integral Nonlinearity (Note 1) INL 1/2 LSB Differential Nonlinearity (Note 1) DNL 1 LSB End-to-End Resistor Tempco TC 50 ppm/C R Ratiometric Resistor Tempco 5 ppm/C Full-Scale Error -0.1 LSB Zero-Scale Error +0.1 LSB Wiper Resistance R 400 1700 W Wiper Capacitance C 10 pF W MAX516 NE 150 200 250 End-to-End Resistance HL MAX516 ME 75 100 125 k MAX516 LE 37.5 50 62.5 DIGITAL INPUTS Input High Voltage V 0.7 V V IH DD Input Low Voltage V 0.3 V V IL DD Input Leakage Current 1 A Input Capacitance 5 pF TIMING CHARACTERISTICS (Figure 6) CS to INC Setup Time t 25 ns CI CS to INC Hold Time t 0 ns IC INC Low Period t 25 ns IL t 25 ns INC High Period IH U/D to INC Hold t 0 ns ID U/D to INC Setup t 50 ns DI Wiper-Settling Time t 1 s IW INC Frequency f 7 MHz IMAX POWER SUPPLIES Supply Voltage V 2.7 5.5 V DD V = +5V 0.6 10 A CS = INC = U/D = DD Supply Current I DD V or GND V = +2.7V 135 nA DD DD Note 1: For the MAX5160, linearity is defined in terms of H to L code-dependent resistance. 2 MAX5160/MAX5161