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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5486 Datasheet

Stereo Volume Control

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MAX5486 pdf
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19-0672; Rev 0; 11/06
Stereo Volume Control with Pushbutton
Interface
General Description
The MAX5486 dual 40kΩ logarithmic taper volume con-
trol features a debounced pushbutton up/down interface
that controls volume and balance in audio applications.
Each potentiometer has 32 log-spaced tap points with a
buffered wiper output to replace mechanical potentiome-
ters. An integrated bias generator provides the required
((VDD + VSS) / 2) bias voltage, eliminating the need for
costly external op-amp circuits in unipolar audio applica-
tions. A mode-indicator LED output indicates volume or
balance control. Five integrated LED drivers indicate vol-
ume level or balance settings, depending on the status of
the mode indicator.
Use the MAX5486 digital inputs with momentary con-
tact single-pole/single-throw (SPST) pushbutton switch-
es. Each input includes internal debounced circuitry
and a pullup resistor to VLOGIC.
The MAX5486 advances the wiper setting once per but-
ton push. Maxim’s proprietary SmartWiper™ control
eliminates the need for a microcomputer to increase the
wiper transition rate. The accelerated auto-advance
feature provides a wiper-changing rate at 4Hz for hold-
ing the control input low for more than 250ms and at
8Hz after 500ms and then at 11Hz after 1000ms (see
Table 2).
All of the MAX5486’s pushbutton inputs are debounced.
The mute input allows a single pushbutton to change
between volume control and the -90dB (typ) mute set-
ting. The mode input toggles between volume and bal-
ance control. The click-and-pop suppression feature
minimizes the audible noise generated by wiper transi-
tions. The typical total harmonic distortion plus noise
(THD+N) for the device is 0.003%. The MAX5486 pro-
vides a nominal temperature coefficient of 35ppm/°C
end-to-end and 5ppm/°C ratiometrically and a nominal
resistance of 40kΩ per potentiometer. The MAX5486 is
available in a 24-pin TSSOP package and is specified
for operation over the -40°C to +85°C extended temper-
ature range.
Applications
Home-Theater Speakers
Desktop Speakers
Portable Media Players
Docking Stations
Automotive Rear-Seat Multimedia
Features
Debounced Pushbutton Interface
SmartWiper Control Advances Wiper Rate
Low-Power Wiper Buffers Provide 0.003% THD+N
Bias Generator Eliminates External Op Amps
Five-Segment LED Volume/Balance Indicator
Clickless Switching
Logarithmic Taper Volume Control with (31)
2dB Steps
Single +2.7V to +5.5V or Dual ±2.7V Supply
Voltage Operation
Power-On Reset to -12dBFS Wiper Position
MUTE Function Toggles to 90dB (typ)
Low 1µA Shutdown Supply Current
40kΩ End-to-End Fixed Resistance Value
Small, 24-Pin TSSOP Package
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX5486EUG+ -40°C to +85°C 24 TSSOP
+Denotes lead-free package.
PKG
CODE
U24-1
Typical Operating Circuit
VDD VLOGIC
1MΩ
VLOGIC
SHDN
MAX5486
(VDD + VSS) / 2
MODEIND
VPEAK
(VDD + VSS) / 2
HR
WR
RIGHT INPUT
LR
MAX9761
BIAS
LEDIND0
LEDIND1
LEDIND2
LEDIND3
LEDIND4
LL LEFT INPUT
WL
HL
BIASCAP
VPEAK
(VDD + VSS) / 2
GND VSS MUTE UP/BALL DN/BALR MODE
SmartWiper is a trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5486 Datasheet

Stereo Volume Control

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MAX5486 pdf
www.DataSheet4U.com
Stereo Volume Control with Pushbutton
Interface
ABSOLUTE MAXIMUM RATINGS
SHDN, MODE, MUTE, UP/BALL, and DN/BALR to
GND .................-0.3V to the lower of (VLOGIC + 0.3V and +6V)
H_, L_, W_, BIASCAP,
BIAS to GND .........-0.3V to the lower of (VDD + 0.3V and +6V)
LEDIND_, MODEIND to GND ...................................-0.3V to +6V
VLOGIC to GND.........................................................-0.3V to +6V
VDD to GND ..............................................................-0.3V to +6V
VDD to VLOGIC .............................................................-6V to +6V
GND to VSS...............................................................-0.3V to +6V
VDD to VSS ................................................................-0.3V to +6V
Average Current into H_, L_, and W_ .................................±1mA
Maximum Continuous Current into H_, L_ ..........................±4mA
Input and Output Latchup Immunity...............................±200mA
Continuous Power Dissipation (TA = +70°C)
24-Pin TSSOP (derate 8.3mW/°C above +70°C) ..........657mW
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-60°C to +150°C
Maximum Junction Temperature .....................................+150°C
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
(VDD = +2.7V to +5.5V, VSS = GND = 0, 2.7V (VDD - VSS) 5.5V, CBIASCAP = 1µF, BIAS = 3kΩ to GND, VLOGIC = +2.7V to VDD,
VH_ = VDD - 0.15V, VL_ = (VDD - VSS) / 2, SHDN = MUTE = VLOGIC, all LED outputs open, pushbutton interface inactive, VH = VBIAS
+ 1VRMS, VBIAS = (VDD - VSS) / 2, TA = TMIN to TMAX, unless otherwise specified. Typical values are at TA = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
RESISTOR LADDER
End-to-End Resistance
R
40 kΩ
Absolute Tolerance
±0.25
dB
Tap-to-Tap Tolerance
(Note 2)
±0.1
dB
VOLUME CONTROL
VDD = 5V, VSS = 0, VH = (VDD / 2) + 1VRMS,
VL = VDD / 2, 1kHz, tap at top, RL = 10kΩ to
VL = VDD / 2, 20Hz to 20kHz
0.003
Total Harmonic Distortion Plus
Noise
THD+N
VDD = 5V, VSS = 0, VH = (VDD / 2) + 1VRMS,
VL = VDD / 2, 1kHz, tap at top, RL = ∞Ω to
VL = VDD / 2, 20Hz to 20kHz
0.001
%
Channel Isolation
Interchannel Matching
Mute Attenuation
Power-Supply Rejection Ratio
H Terminal Capacitance
L Terminal Capacitance
End-to-End Resistance
Temperature Coefficient
VDD = 5V, VSS = 0, VH = (VDD / 2) +
1.5VRMS, VL = VDD / 2, 1kHz, tap at top,
RL = 10kΩ to VL = VDD / 2, 20Hz to 20kHz
VDD = +2.7V, VSS = -2.7V, VBIAS = GND
PSRR
CH
CL
SHDN = VDD
Input referred, 217Hz, 100mVP-P on VDD
0.012
100
±0.5
90
72
5
7
35
dB
dB
dB
dB
pF
pF
ppm/°C
Ratiometric Resistance
Temperature Coefficient
Bandwidth, -3dB
fCUTOFF CW = 50pF
5 ppm/°C
100 kHz
2 _______________________________________________________________________________________


Part Number MAX5486
Description Stereo Volume Control
Maker Maxim Integrated Products
Total Page 16 Pages
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