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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5486 Datasheet

Stereo Volume Control

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MAX5486
Stereo Volume Control with Pushbutton
Interface
General Description
The MAX5486 dual 40kΩ logarithmic taper volume control
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 potentiometers. An inte-
grated bias generator provides the required ((VDD + VSS)/2)
bias voltage, eliminating the need for costly external op-amp
circuits in unipolar audio applications. A mode-indicator
LED output indicates volume or balance control. Five inte-
grated LED drivers indicate volume level or balance settings,
depending on the status of the mode indicator.
Use the MAX5486 digital inputs with momentary contact
single-pole/single-throw (SPST) pushbutton switches.
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 elimi-
nates the need for a microcomputer to increase the wiper
transition rate. The accelerated auto-advance feature pro-
vides a wiper-changing rate at 4Hz for holding 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 setting.
The mode input toggles between volume and balance
control. The click-and-pop suppression feature minimizes
the audible noise generated by wiper transitions. The
typical total harmonic distortion plus noise (THD+N) for
the device is 0.003%. The MAX5486 provides 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 temperature range.
Applications
● Home-Theater Speakers
● Desktop Speakers
● Portable Media Players
● Docking Stations
SmartWiper is a trademark of Maxim Integrated Products, Inc.
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
MAX5486EUG+
TEMP RANGE
-40°C to +125°C
PIN-PACKAGE
24 TSSOP
+Denotes a lead(Pb)-free/RoHS-compliant package.
Typical Operating Circuit
VDD VLOGIC
VLOGIC
SHDN
MAX5486
MODEIND
HR
VPEAK
(VDD + VSS) / 2
1M
(VDD + VSS) / 2
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
19-0672; Rev 1; 4/14


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX5486 Datasheet

Stereo Volume Control

No Preview Available !

MAX5486
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 = 0V, 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
RESISTOR LADDER
End-to-End Resistance
Absolute Tolerance
Tap-to-Tap Tolerance
VOLUME CONTROL
Total Harmonic Distortion Plus
Noise
Channel Isolation
Interchannel Matching
Mute Attenuation
Power-Supply Rejection Ratio
H Terminal Capacitance
L Terminal Capacitance
End-to-End Resistance
Temperature Coefficient
Ratiometric Resistance
Temperature Coefficient
Bandwidth, -3dB
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
R
(Note 2)
40
±0.25
±0.1
dB
dB
THD+N
VDD = 5V, VSS = 0V, VH = (VDD/2) +
1VRMS, VL = VDD/2, 1kHz, tap at top, RL =
10kΩ to VL = VDD/2, 20Hz to 20kHz
VDD = 5V, VSS = 0V, VH = (VDD/2) +
1VRMS, VL = VDD/2, 1kHz, tap at top,
RL = Ω to VL = VDD/2, 20Hz to 20kHz
VDD = 5V, VSS = 0V, 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
fCUTOFF CW = 50pF
0.003
0.001
0.012
100
±0.5
90
72
5
7
35
5
100
%
dB
dB
dB
dB
pF
pF
ppm/°C
ppm/°C
kHz
www.maximintegrated.com
Maxim Integrated 2


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