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MAX5486EUG+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16
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
((V
DD
+ V
SS
) / 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 V
LOGIC
.
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
MAX5486
Stereo Volume Control with Pushbutton
Interface
________________________________________________________________
Maxim Integrated Products
1
19-0672; Rev 0; 11/06
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.
Ordering Information
V
DD
V
SS
(V
DD +
V
SS
) / 2
(V
DD +
V
SS
) / 2
V
LOGIC
V
PEAK
HR
L
R
WR
SHDN
LEFT INPUT
RIGHT INPUT
MODEIND
MAX9761
LL
HL
WL
V
LOGIC
LEDIND4
LEDIND3
LEDIND0
GND
MUTE
LEDIND1
LEDIND2
BIAS
BIASCAP
MAX5486
UP/BALL
DN/BALR
MODE
1MΩ
(V
DD +
V
SS
) / 2
V
PEAK
Typical Operating Circuit
PART TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX5486EUG+ -40°C to +85°C 24 TSSOP U24-1
SmartWiper is a trademark of Maxim Integrated Products, Inc.
+
Denotes lead-free package.
MAX5486
Stereo Volume Control with Pushbutton
Interface
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
DD
= +2.7V to +5.5V, V
SS
= GND = 0, 2.7V ≤ (V
DD
- V
SS
) ≤ 5.5V, C
BIASCAP
= 1µF, BIAS = 3kΩ to GND, V
LOGIC
= +2.7V to V
DD
,
VH_ = V
DD
- 0.15V, V
L_
= (V
DD
- V
SS
) / 2, SHDN = MUTE = V
LOGIC
, all LED outputs open, pushbutton interface inactive, V
H
= V
BIAS
+ 1V
RMS
, V
BIAS
= (V
DD
- V
SS
) / 2, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at T
A
= +25°C.) (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.
SHDN, MODE, MUTE, UP/BALL, and DN/BALR to
GND .................-0.3V to the lower of (V
LOGIC
+ 0.3V and +6V)
H_, L_, W_, BIASCAP,
BIAS to GND .........-0.3V to the lower of (V
DD
+ 0.3V and +6V)
LEDIND_, MODEIND to GND ...................................-0.3V to +6V
V
LOGIC
to GND.........................................................-0.3V to +6V
V
DD
to GND..............................................................-0.3V to +6V
V
DD
to V
LOGIC
.............................................................-6V to +6V
GND to V
SS
...............................................................-0.3V to +6V
V
DD
to V
SS
................................................................-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 (T
A
= +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
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
V
DD
= 5V, V
SS
= 0, V
H
= (V
DD
/ 2) + 1V
RMS
,
V
L
= V
DD
/ 2, 1kHz, tap at top, R
L
= 10kΩ to
V
L
= V
DD
/ 2, 20Hz to 20kHz
0.003
V
DD
= 5V, V
SS
= 0, V
H
= (V
DD
/ 2) + 1V
RMS
,
V
L
= V
DD
/ 2, 1kHz, tap at top, R
L
= ∞Ω to
V
L
= V
DD
/ 2, 20Hz to 20kHz
0.001
Total Harmonic Distortion Plus
Noise
THD+N
V
DD
= 5V, V
SS
= 0, V
H
= (V
DD
/ 2) +
1.5V
RMS
, V
L
= V
DD
/ 2, 1kHz, tap at top,
R
L
= 10kΩ to V
L
= V
DD
/ 2, 20Hz to 20kHz
0.012
%
Channel Isolation V
DD
= +2.7V, V
SS
= -2.7V, V
BIAS
= GND 100 dB
Interchannel Matching ±0.5 dB
Mute Attenuation SHDN = V
DD
90 dB
Power-Supply Rejection Ratio PSRR Input referred, 217Hz, 100mV
P-P
on V
DD
72 dB
H Terminal Capacitance C
H
5pF
L Terminal Capacitance C
L
7pF
End-to-End Resistance
Temperature Coefficient
35 ppm/°C
Ratiometric Resistance
Temperature Coefficient
5 ppm/°C
Bandwidth, -3dB f
CUTOFF
C
W
= 50pF 100 kHz
MAX5486
Stereo Volume Control with Pushbutton
Interface
_______________________________________________________________________________________ 3
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Output Noise e
N
20Hz to 20kHz, V
H
= V
L
= V
DD
/ 2 = AC
ground, tap = -6dB
2.2 µV
RMS
WIPER BUFFER
Output Voltage Swing V
O
R
L
= 3kΩ to V
BIAS
V
DD
-
0.3V
V
Output Current 3mA
Output Resistance R
OWB
110Ω
DC Offset V
OS
±2 ±14 mV
INTEGRATED BIAS GENERATOR
Output Voltage R
L
> 100kΩ
(V
DD
+
V
SS
) / 2
- 20mV
(V
DD
+
V
SS
) / 2
(V
DD
+
V
SS
) / 2
+ 20mV
V
Power-Supply Rejection Ratio At 1kHz, 100mV
P-P
on V
DD
60 dB
Minimum Load Resistance 3kΩ
Maximum Load Capacitance 100 pF
Output Resistance R
OBR
6 Ω
Noise Voltage 20Hz to 20kHz 2.2 µV
RMS
Minimum Output Current 2mA
CONTACT INPUTS (MUTE, MODE, UP/BALL, DN/BALR)
Internal Pullup Resistor R
PU
42 kΩ
Single-Pulse Input Low Time t
CPW
Time required for a single pulse to cause an
increment/decrement
16 ms
Repetitive Input Pulse Separation
Time
t
IPWS
1ms
Timeout Period t
WS
Click-and-pop suppression inactive 126 ms
Debounce Corner Frequency Internal analog filter 10 kHz
DIGITAL INPUTS (V
LOGIC
> 4.5V)
V
LOGIC
> 4.5V 2.4
Input High Voltage V
IH
V
LOGIC
< 4.5V
0.7 x
V
LOGIC
V
V
LOGIC
> 4.5V 0.8
Input Low Voltage V
IL
V
LOGIC
< 4.5V
0.3 x
V
LOGIC
V
Input Leakage Current
To GND for inputs with internal pullup
resistors
±1 µA
Input Capacitance 5pF
Digital Clock Feedthrough f
CLK
= 1Hz to 40Hz, tap = -6dB -90 dB
ELECTRICAL CHARACTERISTICS (continued)
(V
DD
= +2.7V to +5.5V, V
SS
= GND = 0, 2.7V ≤ (V
DD
- V
SS
) ≤ 5.5V, C
BIASCAP
= 1µF, BIAS = 3kΩ to GND, V
LOGIC
= +2.7V to V
DD
,
VH_ = V
DD
- 0.15V, V
L_
= (V
DD
- V
SS
) / 2, SHDN = MUTE = V
LOGIC
, all LED outputs open, pushbutton interface inactive, V
H
= V
BIAS
+ 1V
RMS
, V
BIAS
= (V
DD
- V
SS
) / 2, T
A
= T
MIN
to T
MAX
, unless otherwise specified. Typical values are at T
A
= +25°C.) (Note 1)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P16

MAX5486EUG+T

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Buy MAX5486EUG+T
Manufacturer:
Maxim Integrated
Description:
Digital Potentiometer ICs Stereo Vol Control w/Pushbutton Int
Lifecycle:
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