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參數(shù)資料
| 型號(hào)： | MAX5486 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Stereo Volume Control with Pushbutton Interface |
| 中文描述： | 立體聲音量控制，提供按鍵接口 |
| 文件頁數(shù)： | 8/16頁 |
| 文件大?。?/td> | 232K |
| 代理商： | MAX5486 |
M
Stereo Volume Control with Pushbutton
Interface
8
_______________________________________________________________________________________
Detailed Description
The MAX5486 dual 40k
Ω
logarithmic taper digital vol-
ume control features a debounced pushbutton interface
that controls volume and balance in audio applications.
Each potentiometer has 32 log-spaced tap points with
a buffered wiper output and replaces mechanical
potentiometers.
Mode Control (
MODE
)
The MAX5486
MODE
input toggles between volume
and balance modes. Each time
MODE
is forced low,
the device switches between volume and balance
modes. For example, driving
MODE
low once while in
volume-control mode switches the MAX5486 to balance
mode. Driving
MODE
low again switches the MAX5486
back to volume mode.
MODE
is internally pulled high
with a resistor to V
LOGIC
. The MAX5486 powers up in
volume-control mode. Leave unconnected or connect
to V
LOGIC
if balance mode is not required.
Up-and-Down Interface
The MAX5486 interfaces with momentary contact SPST
switches. All switch inputs are internally debounced and
pulled up to V
LOGIC
through resistors. The wiper setting
advances once per button press up to 250ms. Maxim’s
SmartWiper control circuitry allows the wiper to advance
at a 4Hz rate after holding the button for approximately
250ms. After 500ms, the wiper moves at an 8Hz rate.
After 1s, the rate increases to 11Hz (see Table 2). The
SmartWiper control eliminates the need for a microcom-
puter to increase the wiper transition rate.
The MAX5486
MODE
input toggles the part between vol-
ume and balance-control modes. The
UP/BALL
and
DN/BALR
inputs control the wiper according to the
selected mode.
MODE
is internally pulled high with a
resistor to V
LOGIC
.
Volume Control
In volume-control mode, the MAX5486’s wipers move
simultaneously, maintaining the balance separation
between each wiper (Figure 2a).
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 (Figure 2b).
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 (Figure 2c). Increasing the
volume from this minimum position restores the original
balance separation of the wipers (Figure 2d).
GND
MOMENTARY
CONTACT
SPST
PUSHBUTTONS
DN
V
LOGIC
UP
MAX5486
Figure 1. Pushbutton Interface
POSITION
0
1
2
3
4
ATTENUATION (dB)
0
2
4
6
8
M
M
30
31
60
62
> 90
32 (mute)
Table 1. Wiper Position and Attenuation
CONTACT DURATION
t
≤
16ms
16ms < t
≤
250ms
WIPER ACTION
No motion.
Wiper changes position once.
250ms < t
≤
500ms
SmartWiper begins. Wiper
changes position at a rate of 4Hz.
500ms < t
≤
1000ms
Wiper changes position at a rate
of 8Hz.
t > 1000 ms
Wiper changes position at a rate
of 11Hz.
Table 2. Wiper Action vs. Pushbutton
Contact Duration
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX5486EUG+ | 功能描述:數(shù)字電位計(jì) IC Stereo Vol Control w/Pushbutton Int RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5486EUG+T | 功能描述:數(shù)字電位計(jì) IC Stereo Vol Control w/Pushbutton Int RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5487ETE | 制造商:Maxim Integrated Products 功能描述:DUAL 256-TAP SPI 10K DIGITAL POTENTIOMETER - Rail/Tube |
| MAX5487ETE#G16 | 功能描述:數(shù)字電位計(jì) IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
| MAX5487ETE#TG16 | 功能描述:數(shù)字電位計(jì) IC RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數(shù):35 PPM / C 容差:25 % POT 數(shù)量:Dual 每 POT 分接頭:256 弧刷存儲(chǔ)器:Volatile 緩沖刷: 數(shù)字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作電源電壓:1.7 V to 5.5 V 電源電流:27 uA 最大工作溫度:+ 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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