EVALUATION KIT AVAILABLE MAX5456/MAX5457 Stereo Audio Taper Potentiometers with Pushbutton Interface General Description Features The MAX5456/MAX5457 dual, logarithmic taper digital SmartWiper Control Provides Accelerated Wiper potentiometers feature a simple pushbutton interface Motion that controls volume and balance in audio applications. Debounced Pushbutton Interface with Internal Each potentiometer has 32 tap points and replaces Pullup Resistors mechanical potentiometers. Refer to the MAX5408 Logarithmic Taper with 2dB Steps Between Taps MAX5411 data sheet for SPI versions of the MAX5456/ MAX5457. Single +2.7V to +5.5V or Dual 2.7V Supply Operation Use the MAX5456/MAX5457 digital inputs with momen- tary contact single-pole/single-throw (SPST) pushbutton Low 0.5A Standby Supply Current switches. Each input includes internal debounce cir- Clickless Switching cuitry and a 50k pullup resistor. 10k End-to-End Fixed Resistance Value The MAX5456/MAX5457 advance the wiper setting once Mute Function to -90dB (typ) per button push. Maxims proprietary SmartWiper con- trol eliminates the need for a microcomputer to increase Power-On Reset to -12dB Wiper Position the wiper transition rate. Holding the control input low for 32 Tap Positions for Each Wiper more than 1s advances the wiper at a rate of 4Hz for 4s Small 16-Pin QSOP Package and 16Hz per second thereafter. The MAX5456/MAX5457 provide temperature coeffi- cients of 50ppm/C end-to-end and 5ppm/C ratiomet- Ordering Information ric and a nominal resistance of 10k per potentiometer. An integrated click/pop suppression feature minimizes PART TEMP RANGE PIN-PACKAGE the audible noise generated by wiper transitions. The o o MAX5456EEE+ -40 C to +85 C 16 QSOP typical total harmonic distortion plus noise (THD+N) for o o MAX5457EEE+ -40 C to +85 C 16 QSOP these devices is 0.01%. +Denotes a lead(Pb)-free/RoHS-compliant package. The MAX5457 features a 3-button interface with a Note: For leaded version, contact factory. MODE input that toggles between volume- and balance- control modes. An LED output indicates volume or bal- ance mode. The MAX5456 features a 4-button interface with separate inputs for up and down volume controls and left and right balance controls. The MAX5456/MAX5457 is available in a 16-pin QSOP Pin Configurations packages and specified over the extended (-40C to +85C) temperature range. TOP VIEW Applications + DN/BAL0 1 16 V DD Stereo Volume Control UP/BAL1 2 15 V LOGIC Fading and Balancing Stereo Signals MODE 3 14 GND Stereo Blending and Mixing MODE IND 4 MAX5457 13 V SS H0 5 12 H1 L0 6 11 L1 W0 7 10 W1 SHDN 8 9 MUTE Typical Application Circuits and Selector Guide appear at end of data sheet. QSOP Pin Configurations are continued at end of data sheet. SmartWiper is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrateds website at www.maximintegrated.com. 19-3490 Rev 2 8/12MAX5456/MAX5457 Stereo Audio Taper Potentiometers with Pushbutton Interface ABSOLUTE MAXIMUM RATINGS Peak Current into H , L , and W .......................................1mA (MAX5456) SHDN, MUTE, VOLUP, VOLDN, BAL to GND.....................................-0.3V to (V + 0.3V) Average Current into H , L , and W ..............................500A LOGIC Input and Output Latchup Immunity...............................200mA (MAX5457) SHDN, MUTE, UP/BAL1, DN/BAL0, MODE, MODE IND to GND...........................-0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) A LOGIC 16-Pin QSOP (derate 8.3mW/C above +70C)........666.7mW H , L , and W to V ..............................-0.3V to (V + 0.3 V) SS DD Operating Temperature Range ...........................-40C to +85C V to GND..............................................................-0.3V to +6V DD V to V ................................................................-0.3V to +6V Junction Temperature......................................................+150C DD SS Storage Temperature Range .............................-60C to +150C V to GND.........................................................-0.3V to +6V LOGIC V to V ...........................................................-0.3V to +6V Lead Temperature (soldering, 10s) .................................+300C LOGIC SS Soldering Temperature (reflow) .......................................+260C V to GND............................................................-3.0V to +0.3V SS 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 = V = +2.7V to +5.5V, V = 0V, GND = 0V, V = V , V = V , T = T to T . Typical values are at T = +25C, DD LOGIC SS H DD L SS A MIN MAX A unless otherwise specified.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS End-to-End Resistance R Figures 1, 2 7 10 13 k Maximum Bandwidth f From H to W , C = 10pF 100 kHz CUTOFF LOAD Absolute Ratio Tolerance N o loa d at the outpu t of the wi p er , W = - 6dB 0.25 dB Tap-to-Tap Tolerance 0.1 dB V = 5V, V = (V / 2) + 1V , DD H DD RMS 0.01 f = 1kHz, tap = -6dB, V = V / 2, R = L DD L Total Harmonic Distortion Plus THD+N % V = 3V, V = 0V, V = 1.5V, DD SS L Noise V = 1.5V + 1V , f = 1kHz, R = 10k to H RMS L 0.23 (V / 2), C = 5pF, tap = -6dB DD L Channel-to-Channel Isolation -100 dB Interchannel Matching f = 20Hz to 20kHz, tap = -6dB 0.5 dB Mute Attenuation -90 dB Power-Supply Rejection Ratio PSRR -80 dB Wiper Resistance R 1000 1700 W Wiper Capacitance C 10 pF W H Terminal Capacitance C 5pF H L Terminal Capacitance C 7pF L End-to-End Resistance 50 ppm/C Temperature Coefficient Ratiometric Resistance 5 ppm/C Temperature Coefficient Output Noise e 20Hz to 20kHz 0.95 V n RMS PUSHBUTTON CONTACT INPUTS (UP/BAL1, DN/BAL0, MUTE, VOLUP, VOLDN, BAL0, BAL1, MODE) Internal Pullup Resistor R 32 50 65 k PULLUP Single Pulse-Width Input t Figure 5 22.5 ms lPW Repetitive Input Pulse High Time t Figure 5 40 ms HPW Timeout Period t Click/pop suppression inactive 32 ms WS 2 Maxim Integrated