MAX5456EEE+-MAX5456EEE+T-MAX5457EEE+-MAX5457EEE+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX5456EEE+T ,Stereo Audio Taper Potentiometers with Pushbutton InterfaceELECTRICAL CHARACTERISTICS(V = V = +2.7V to +5.5V, V = 0V, GND = 0V, V = V , V = V , T = T to T . T ..
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MAX5456EEE+-MAX5456EEE+T-MAX5457EEE+-MAX5457EEE+T
Stereo Audio Taper Potentiometers with Pushbutton Interface
General Description
The MAX5456/MAX5457 dual, logarithmic taper digital
potentiometers feature a simple pushbutton interface
that controls volume and balance in audio applications.
Each potentiometer has 32 tap points and replaces
mechanical potentiometers. Refer to the MAX5408–
MAX5411 data sheet for SPI versions of the MAX5456/
MAX5457.
Use the MAX5456/MAX5457 digital inputs with momen-
tary contact single-pole/single-throw (SPST) pushbutton
switches. Each input includes internal debounce cir-
cuitry and a 50kΩpullup resistor.
The MAX5456/MAX5457 advance the wiper setting once
per button push. Maxim’s proprietary SmartWiper™ con-
trol eliminates the need for a microcomputer to increase
the wiper transition rate. Holding the control input low for
more than 1s advances the wiper at a rate of 4Hz for 4s
and 16Hz per second thereafter.
The MAX5456/MAX5457 provide temperature coeffi-
cients of 50ppm/°C end-to-end and 5ppm/°C ratiomet-
ric and a nominal resistance of 10kΩper potentiometer.
An integrated click/pop suppression feature minimizes
the audible noise generated by wiper transitions. The
typical total harmonic distortion plus noise (THD+N) for
these devices is 0.01%.
The MAX5457 features a 3-button interface with a
MODEinput 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
packages and specified over the extended (-40°C to
+85°C) temperature range.
Applications
Stereo Volume Control
Fading and Balancing Stereo Signals
Stereo Blending and Mixing
FeaturesSmartWiper Control Provides Accelerated Wiper
MotionDebounced Pushbutton Interface with Internal
Pullup ResistorsLogarithmic Taper with 2dB Steps Between TapsSingle +2.7V to +5.5V or Dual ±2.7V Supply
OperationLow 0.5µA Standby Supply CurrentClickless Switching10kΩEnd-to-End Fixed Resistance ValueMute Function to -90dB (typ)Power-On Reset to -12dB Wiper Position32 Tap Positions for Each WiperSmall 16-Pin QSOP Package
MAX5456/MAX5457
Stereo Audio Taper Potentiometers
with Pushbutton Interface
EVALUATION KIT AVAILABLE
Ordering Information
Typical Application Circuits and Selector Guide appear at
end of data sheet.
PARTTEMP RANGEPIN-PACKAGE
MAX5456EEE+-40oC to +85oC16 QSOP
MAX5457EEE+-40oC to +85oC16 QSOP
TOP VIEW
DN/BAL0VDD
VLOGIC
GND
VSS
MUTE
MAX5457
QSOP
UP/BAL1
MODE
MODE_IND
SHDN
Pin Configurations
+Denotes a lead(Pb)-free/RoHS-compliant package.
Note: For leaded version, contact factory.
Stereo Audio Taper Potentiometers
with Pushbutton Interface
MAX5456/MAX5457
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VDD= VLOGIC= +2.7V to +5.5V, VSS= 0V, GND = 0V, VH_ = VDD, VL_ = VSS, TA= TMINto TMAX. Typical values are at TA= +25°C,
unless otherwise specified.) (Note 1)
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.
(MAX5456) SHDN, MUTE, VOLUP, VOLDN,
BAL_to GND.....................................-0.3V to (VLOGIC+ 0.3V)
(MAX5457) SHDN, MUTE, UP/BAL1, DN/BAL0, MODE,
MODE_IND to GND...........................-0.3V to (VLOGIC+ 0.3V)
H_, L_, and W_ to VSS..............................-0.3V to (VDD+ 0.3 V)
VDDto GND..............................................................-0.3V to +6V
VDDto VSS................................................................-0.3V to +6V
VLOGICto GND.........................................................-0.3V to +6V
VLOGICto VSS...........................................................-0.3V to +6V
VSSto GND............................................................-3.0V to +0.3V
Peak Current into H_, L_, and W_.......................................±1mA
Average Current into H_, L_, and W_..............................±500µA
Input and Output Latchup Immunity...............................±200mA
Continuous Power Dissipation (TA= +70°C)
16-Pin QSOP (derate 8.3mW/°C above +70°C)........666.7mW
Operating Temperature Range...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-60°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
Soldering Temperature (reflow).......................................+260°C
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
End-to-End ResistanceRFigures 1, 271013kΩ
Maximum BandwidthfCUTOFFFrom H_ to W_, CLOAD = 10pF100kHz
Absolute Ratio ToleranceN o l oad at the outp ut of the w i p er , W _ = - 6d B±0.25dB
Tap-to-Tap Tolerance±0.1dB
VDD = 5V, VH_ = (VDD / 2) + 1VRMS,
f = 1kHz, tap = -6dB, VL_ = VDD / 2, RL = ∞0.01
Total Harmonic Distortion Plus
NoiseTHD+NVDD = 3V, VSS = 0V, VL_ = 1.5V,
VH_ = 1.5V + 1VRMS, f = 1kHz, RL = 10kΩ to
(VDD / 2), CL = 5pF, tap = -6dB
Channel-to-Channel Isolation-100dB
Interchannel Matchingf = 20Hz to 20kHz, tap = -6dB±0.5dB
Mute Attenuation-90dB
Power-Supply Rejection RatioPSRR-80dB
Wiper ResistanceRW10001700Ω
Wiper CapacitanceCW10pF
H Terminal CapacitanceCH5pF
L Terminal CapacitanceCL7pF
End-to-End Resistance
Temperature Coefficient50ppm/°C
Ratiometric Resistance
Temperature Coefficient5ppm/°C
Output Noiseen20Hz to 20kHz0.95µVRMS
PUSHBUTTON CONTACT INPUTS (UP/BAL1, DN/BAL0, MUTE, VOLUP, VOLDN, BAL0, BAL1, MODE)
Internal Pullup ResistorRPULLUP325065kΩ
Single Pulse-Width InputtlPWFigure 522.5ms
Repetitive Input Pulse High TimetHPWFigure 540ms
Stereo Audio Taper Potentiometers
with Pushbutton Interface
MAX5456/MAX5457
Note 1:Parameters are 100% production tested at +85°C and limits through temperature are guaranteed by design.
Note 2:Supply current measured with the supply on and a button pushed.
Note 3:Supply current measured with the power on, no button pushed, and the wiper position fixed.
Note 4:This is the measured current with SHDNlow and MODE_IND unconnected.
ELECTRICAL CHARACTERISTICS (continued)
(VDD= VLOGIC= +2.7V to +5.5V, VSS= 0V, GND = 0V, VH_ = VDD, VL_ = VSS, TA= TMINto TMAX. Typical values are at TA= +25°C,
unless otherwise specified.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
First Autoincrement Point1s
First Autoincrement Rate4Hz
Second Autoincrement Point4s
Second Autoincrement Rate16Hz
DIGITAL INPUTS (VLOGIC > 4.5V)
Input High VoltageVIH2.4V
Input Low VoltageVIL0.8V
Input Leakage CurrentInputs floating±1µA
Input Capacitance5pF
DIGITAL INPUTS (VLOGIC < 4.5V)
Input High VoltageVIH0.7 xL OGIC V
Input Low VoltageVIL0.3 xL OGIC V
Input Leakage CurrentInputs floating±1µA
Input Capacitance5pF
POWER SUPPLIES
Supply VoltageVDD2.75.5V
Negative Power SupplyVSS-2.70V
Supply-Voltage DifferenceVDD - VSS5.5V
Active Supply CurrentIDD(Note 2)100µAD D = + 5.5V , V S S = 0V , V LOGIC = 2.7V ( N ote 3) 210Standby Supply CurrentISTBYVLOGIC = VDD = +2.7V, VSS = -2.7V (Note 3)0.51µA
Shutdown Supply CurrentISHDN(Note 4)1µA
Power-Up TimetPU10ms
Logic Standby VoltageVLOGIC2.7VDDV
Logic Active Supply CurrentILOGIC(Note 2)160µA
Logic Standby Supply CurrentILOGICSTBY(Note 3)0.51µA
Logic Shutdown CurrentILOGICSHDN(Note 4)1µA
DIGITAL OUTPUT, MODE_IND
VLOGIC = 2.7V, ISINK = 10mA0.4Output Low VoltageVOLVLOGIC = 5.5V, ISINK = 10mA0.2V
Output Leakage Current0.110µA
Output Capacitance3pF
Maximum Sink Current150mA
Typical Operating Characteristics
(VDD= VLOGIC= +2.7V to +5.5V, VSS= 0V, GND = 0V, VH_ = VDD, VL_ = VSS, TA= TMINto TMAX. Typical values are at TA= +25°C,
unless otherwise specified.)
WIPER RESISTANCE vs. WIPER VOLTAGE
MAX5456/7 toc01
WIPER VOLTAGE (V)
WIPER RESISTANCE (
VDD = VLOGIC = 5V
ATTENUATION vs. TAP POSITION
MAX5456/7 toc02
TAP POSITION
ATTENUATION (dB)2420161284
END-TO-END RESISTANCE % CHANGE
vs. TEMPERATURE
MAX5456/7 tpc03
TEMPERATURE (°C)
END-TO-END RESISTANCE CHANGE (%)3510-15
ACTIVE SUPPLY CURRENT vs. TEMPERATURE
ACTIVE SUPPLY CURRENT (
MAX5456/7 toc04
TEMPERATURE (°C)3510-15-4085
VDD = VLOGIC = 5.5V,
ILOGIC + IVDD
WIPER SWITCHING TRANSIENT
(TIMING OUT)
MAX5456/7 toc05a
10ms/div
5V/div
1V/div
VOLUP
WIPER TRANSITION
FROM -2dB to 0dB
VH_ = VDD
VL_ = 0
WIPER SWITCHING TRANSIENT
(SUPPRESSION CIRCUIT ACTIVE)
MAX5456/7 toc05b
4ms/div
5V/div
2V/div
VOLUP
WIPER TRANSITION
FROM -2dB to 0dB
VH_ = SQUARE WAVE FROM
VDD TO VSS, VL_ = VDD / 2
Stereo Audio Taper Potentiometers
with Pushbutton Interface
MAX5456/MAX5457
LOGIC SUPPLY CURRENT
vs. LOGIC SUPPLY VOLTAGE
MAX5456/7 toc06a
LOGIC SUPPLY CURRENT (
ACTIVE LOGIC SUPPLY
CURRENT
5.25.54.24.73.73.22.7
FREQUENCY RESPONSE
FREQUENCY (kHz)
RESPONSE (dB)
MAX5456/7 toc08
VH_ = 2.5V ±1VP-P, VL_ = 2.5V,
CL_ = 10pF
W_ SET TO 0dB
W_ SET TO -6dB
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY
FREQUENCY (Hz)
THD+N (%)
10,0001000100
0.0001100,000
MAX5456/7 toc09
VH_ = 2.5V ±1VP-P, VL_ = 2.5V,
W_ SET TO -6dB,
20Hz TO 20kHz BANDPASS
LOAD = 10kΩ
NO LOAD
DIGITAL SUPPLY CURRENT
vs. DIGITAL INPUT VOLTAGE
MAX5456/7 toc10
DIGITAL INPUT VOLTAGE (V)
DIGITAL SUPPLY CURRENT (321
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX5456/7 toc11
FREQUENCY (kHz)
PSRR (dB)
VDD = 5V ±1VP-P, VH_ = 5V,
VL_ = 2.5V, W_ SET TO -6dB
LOGIC SUPPLY CURRENT
vs. TEMPERATURE
MAX5456/7 toc12
LOGIC SUPPLY CURRENT (mA)3510-15
VLOGIC = 5.5V
ACTIVE LOGIC SUPPLY
CURRENTypical Operating Characteristics (continued)
(VDD= VLOGIC= +2.7V to +5.5V, VSS= 0V, GND = 0V, VH_ = VDD, VL_ = VSS, TA= TMINto TMAX. Typical values are at TA= +25°C,
unless otherwise specified.)
Stereo Audio Taper Potentiometers
with Pushbutton Interface
MAX5456/MAX5457
LOGIC SUPPLY CURRENT
vs. LOGIC SUPPLY VOLTAGE
MAX5456/7 toc06b
LOGIC SUPPLY VOLTAGE (V)
LOGIC SUPPLY CURRENT (
STANDBY LOGIC SUPPLY
CURRENT
WIPER-TO-END TERMINAL RESISTANCE
vs. TAP POSITION
MAX5456/7 toc07
TAP POSITION
NOMINAL END-TO-END RESISTANCE (%R168
RWH
RWL
SPECTRAL NOISE DENSITY
MAX5456 toc13
NOISE (nV
RMS10.1
0.01100
Stereo Audio Taper Potentiometers
with Pushbutton Interface
MAX5456/MAX5457
Pin Description
PIN
MAX5457MAX5456NAMEFUNCTIONMODE
Volume/Balance Control. Each transition from high to low toggles between volume and
balance modes. MODE is pulled high internally with a 50kΩ resistor to VLOGIC. On
power-up, the MAX5457 is in volume-control mode.MODE_IND
Volume-Control/Balance-Control Mode Indicator Open-Drain Output. Connect to
an LED through a resistor to VLOGIC. When the LED is on, the MAX5457 is in balance-
control mode. When the LED is off, the MAX5457 is in volume-control mode. See the
Mode Indicator, MODE_IND section for more detail.5H0Potentiometer 0 High Terminal. H0 and L0 terminals can be reversed.6L0Potentiometer 0 Low Terminal. L0 and H0 terminals can be reversed.7W0Potentiometer 0 Wiper TerminalSHDN
Active-Low Shutdown Input. In shutdown mode, the MAX5456/MAX5457 store the last
wiper settings. The wipers move to the L end of the resistor string, and the H end of
the resistor string disconnects from the signal input. Terminating shutdown mode
restores the wipers to their previous settings.MUTEMute Input. When MUTE is low, the wiper goes to the highest attenuation setting (see
Table 1). MUTE is internally pulled up with 50kΩ to VLOGIC.10W1Potentiometer 1 Wiper Terminal11L1Potentiometer 1 Low Terminal. L1 and H1 terminals can be reversed.12H1Potentiometer 1 High Terminal. H1 and L1 terminals can be reversed.13VSSNegative Power Supply. Bypass with 0.1µF to ground.14GNDGround15VLOGICDigital Logic Power Supply. Bypass with 0.1µF to ground.16VDDAnalog Power Supply. Bypass with 0.1µF to ground.DN/BAL0
Downward Volume/Channel 0 Balance-Control Input. In volume mode, pressing
DN/BAL0 moves both wipers towards the L terminals. In balance mode, pressing
DN/BAL0 moves the balance towards channel 0. DN/BAL0 is internally pulled up with
50kΩ to VLOGIC.UP/BAL1
Upward Volume/Channel 1 Balance-Control Input. In volume mode, pressing UP/BAL1
moves both wipers towards the H terminals. In balance mode, pressing UP/BAL1
moves the balance towards channel 1. UP/BAL1 is internally pulled up with 50kΩ to
VLOGIC.BAL1Channel 1 Balance-Control Input. Pressing BAL1 moves the balance towards channel
1. BAL1 is internally pulled up with 50kΩ to VLOGIC.BAL0Channel 0 Balance-Control Input. Pressing BAL0 moves the balance towards channel
0. BAL0 is internally pulled up with 50kΩ to VLOGIC.VOLDNDownward Volume-Control Input. Pressing VOLDN moves both wipers towards
the L terminals. VOLDN is internally pulled up with 50kΩ to VLOGIC.VOLUPUpward Volume-Control Input. Pressing VOLUP moves both wipers towards the
H terminals. VOLUP is internally pulled up with 50kΩ to VLOGIC.
Stereo Audio Taper Potentiometers
with Pushbutton Interface
MAX5456/MAX5457
Detailed Description
The MAX5456/MAX5457 dual, logarithmic taper digital
potentiometers feature a simple pushbutton interface that
controls volume and balance in audio applications. Each
potentiometer has 32 tap points and replaces mechanical
potentiometers (see the Functional Diagrams).
Up and Down Interface
The MAX5456/MAX5457 interface with momentary con-
tact SPST switches. All switch inputs are internally
debounced and pulled up to VLOGIC through 50kΩ
resistors. The wiper setting advances once per button
press up to 1s. Maxim’s SmartWiper control circuitry
allows the wiper to advance at a rate of 4Hz when an
input is held low from 1s up to 4s, and at a rate of 16Hz
if the contact is maintained for greater than 4s (see
Table 2). The SmartWiper control eliminates the need for
a microcomputer to increase the wiper transition rate.
The MAX5456 features independent control inputs for
volume and balance control while the MAX5457 MODE
input toggles between volume and balance control.
Each transition of MODEfrom high to low toggles the
MAX5457 between volume-control and balance-control
modes. MODEis internally pulled high with a 50kΩ
resistor to VLOGIC.
Volume Control
In volume-control mode, the MAX5456/MAX5457s’
wipers move simultaneously, maintaining the balance
separation between each wiper (Figure3a).
When either wiper reaches the maximum tap position
(position closest to H_), further commands to increase
the volume are ignored. Balance separation is main-
tained in the maximum volume configuration (Figure3b).
When either wiper reaches the minimum tap position
(position closest to L_), further commands to decrease
the volume adjust the other wiper until it also reaches
the minimum tap position (Figure3c).
Increasing the volume from this minimum position
restores the original balance separation of the wipers
(Figure3d).
When both wipers are in the 31st tap position (-62dB
attenuation), further commands to VOLDNplace the
wipers in the mute position (see Table1). VOLUPor
MUTEpulses return wipers to position 31.
MAX5456
MAX5457
Figure1. Potentiometer Model (Active)CW
MAX5456
MAX5457
Figure2. Potentiometer Model (Shutdown)
Stereo Audio Taper Potentiometers
with Pushbutton Interface
MAX5456/MAX5457
(a)W0W0W1W1PRESS VOLUP
TWICE
PRESS VOLDN
ONCE
NO CHANGEW1W0W0W1W1PRESS VOLUP
ONCEPRESS VOLUP
(b)W1W0W0W1W1PRESS VOLDN
ONCEPRESS VOLDN
(c)W1W0W0W1W1PRESS VOLUP
ONCE
(d)
PRESS VOLUP
ONCE
BALANCE SEPARATION
MAINTAINED
ORIGINAL BALANCE SEPARATION
MAINTAINED
TO 3d
FROM 3c
Figure3. Volume-Control Operation
Table1. Wiper Position and Attenuation
POSITIONATTENUATION (dB)…
6 (POR)12…6062
Stereo Audio Taper Potentiometers
with Pushbutton Interface
MAX5456/MAX5457
Balance Control
In balance-control mode, the MAX5456/MAX5457
adjust the balance between channel 0 and channel 1
while maintaining the set volume. For example, if the
volume of channel 0 equals the volume of channel 1,
forcing the balance towards channel 1 increases the
attenuation of channel 0 (Figure4a). If channel 1 is at a
higher attenuation than channel 0, adjusting the bal-
ance to channel 1 moves channel 1’s wiper up to the
same wiper position as channel 0 before attenuating
channel 0 (Figure4b).
To control the wiper quickly with a logic signal, main-
tain pulses at least 22.5ms wide and separated by at
least 40ms.
Table2. Wiper Action vs. Pushbutton
Contact Duration
CONTACT DURATIONWIPER ACTION
t < 22.5msNo motion (debouncing).
22.5ms < t ≤ 1sWiper changes position once.
1s < t ≤ 4sWiper changes position
at a rate of 4Hz.
t > 4sWiper changes position
at a rate of 16Hz.
(a)W0W0W1W1W1W0W0W1W1
(b)
VOLUME LEVEL IS SET
VOLUME LEVEL MAINTAINED
BALANCE SHIFTS TO W1
VOLUME LEVEL MAINTAINED
BALANCE SHIFTS TO W1VOLUME LEVEL IS SET BY W0
PRESS BAL1
ONCE
PRESS BAL1
ONCE
PRESS BAL1
ONCE
PRESS BAL1
ONCE
Figure4. Balance-Control Operation

Partno	Mfg	Dc	Qty	Available	Descript
MAX5456EEE+ \|MAX5456EEE	MAX	N/a	30	avai	Stereo Audio Taper Potentiometers with Pushbutton Interface
MAX5456EEE+T	MAXI	N/a	2500	avai	Stereo Audio Taper Potentiometers with Pushbutton Interface
MAX5457EEE+ \|MAX5457EEE	MAXIM	N/a	35	avai	Stereo Audio Taper Potentiometers with Pushbutton Interface
MAX5457EEE+T	MAXIM	N/a	194	avai	Stereo Audio Taper Potentiometers with Pushbutton Interface