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參數(shù)資料
| 型號： | MAX5486EUG+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CNTRL VOL STEREO 24TSSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 類型： | 立體聲音量控制 |
| 應(yīng)用： | 車載系統(tǒng)，臺式音頻，機頂盒 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 24-TSSOP |
| 包裝： | 帶卷 (TR) |
MAX5486
Stereo Volume Control with Pushbutton
Interface
8
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8
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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 VLOGIC. The MAX5486 powers up in
volume-control mode. Leave unconnected or connect
to VLOGIC 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 VLOGIC 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 VLOGIC.
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
VLOGIC
UP
MAX5486
Figure 1. Pushbutton Interface
POSITION
ATTENUATION (dB)
00
12
24
36
48
MM
30
60
31
62
32 (mute)
> 90
Table 1. Wiper Position and Attenuation
CONTACT DURATION
WIPER ACTION
t
≤ 16ms
No motion.
16ms < t
≤ 250ms
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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| MAX5487ETE+ | 功能描述:數(shù)字電位計 IC Dual 256-Tap NV SPI-Interface 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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