參數(shù)資料
型號(hào)： MAX5440EAG+T
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 1/16頁(yè)
文件大小： 0K
描述： IC CNTRL VOL STEREO 24-SSOP
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,000
類(lèi)型： 立體聲音量控制
應(yīng)用： 車(chē)載系統(tǒng)，臺(tái)式音頻，機(jī)頂盒
安裝類(lèi)型： 表面貼裝
封裝/外殼： 24-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 24-SSOP
包裝： 帶卷 (TR)
General Description
The MAX5440 dual, 40k logarithmic taper volume con-
trol features a debounced up/down interface for use
with a simple rotary encoder without using a microcon-
troller (C). Each potentiometer has 32 log-spaced tap
points with a buffered wiper output and replaces
mechanical potentiometers. An integrated bias genera-
tor 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 specifies volume or balance control. Five inte-
grated LED drivers indicate volume level or balance set-
tings, depending on the status of the mode indicator.
The MAX5440 includes debounced pushbutton inputs
for mute and mode. 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. A click-and-pop
suppression feature minimizes the audible noise gener-
ated by wiper transitions. The MAX5440 provides a
nominal temperature coefficient of 35ppm/°C end-to-
end and 5ppm/°C, ratiometrically. The MAX5440 is
available in a 24-pin SSOP package and is specified for
operation over the -40°C to +85°C extended tempera-
ture range.
Applications
Stereo Volume Control
Desktop Speakers
Multimedia Docking Stations
Set-Top Boxes
Automotive Back-Seat Multimedia
Features
Logarithmic Taper Volume Control with (31) 2dB
Steps
Low-Power Wiper Buffers Provide 0.003% THD
Single +2.7V to +5.5V or Dual ±2.7V Supply
Voltage Operation
Low 0.5A Shutdown Supply Current
Integrated Bias Voltage Generator
Five-Segment LED Volume/Balance Indicator
Clickless Switching
40k End-to-End Fixed Resistance Value
Mute Function Toggles to -90dB (typ)
Power-On Reset to -12dBFS Wiper Position
MAX5440
Stereo Volume Control
with Rotary Encoder Interface
________________________________________________________________
Maxim Integrated Products
1
24
23
22
21
20
19
17
1
2
3
4
5
6
8
GND
MODEIND
LEDIND4
LEDIND3
VLOGIC
VSS
VDD
MUTE
RENCODEA
RENCODEB
TOP VIEW
MAX5440
LEDIND2
LEDIND1
H1
H0
SHDN
18
7
LEDIND0
GND
15
10
W1
W0
16
9
L1
L0
13
12
BIAS
14
11
MIDBIAS
MODE
SSOP
Pin Configuration
VDD
VSS
(VDD + VSS) / 2
VLOGIC
VPEAK
H1
L1
W1
SHDN
LEFT INPUT
RIGHT INPUT
MODEIND
HEADPHONE
DRIVER
L0
H0
W0
VLOGIC
LEDIND4
LEDIND3
LEDIND0
GND
MUTE
MODE
RENCODEA
RENCODEB
LEDIND1
LEDIND2
ROTARY
ENCODER
MIDBIAS
BIAS
MAX5440
Typical Operating Circuit
19-0542; Rev 2; 11/08
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX5440EAG
-40°C to +85°C
24 SSOP
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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