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參數資料
| 型號： | DS1881E-045 |
| 廠商： | Maxim Integrated Products, Inc. |
| 元件分類： | 數字電位計 |
| 英文描述： | Dual NV Audio Taper Digital Potentiometer |
| 中文描述： | 錐形雙非易失數字電位器音頻 |
| 文件頁數： | 8/16頁 |
| 文件大?。?/td> | 234K |
| 代理商： | DS1881E-045 |
D
Dual NV Audio Taper Digital Potentiometer
8
_____________________________________________________________________
Detailed Description
The DS1881 is a dual-channel, digitally controlled,
audio potentiometer. The
Block Diagram
illustrates the
features of the DS1881. The following sections discuss
these features in detail.
Potentiometer Configurations
The DS1881 potentiometers have two possible attenua-
tion configuration options. The
Configuration Register
section discusses how to change between the two
options. Note that both potentiometers are always set to
the same option.
The factory default for both potentiometers is Option 1
(see Table 1). Option 1 provides 64 positions with 1dB
attenuation per step for positions 0 through 62 and
mute as position 63. Option 2 (see Table 2) is a 34-
position configuration. From position 0, the first 12
steps have 1dB attenuation per step, the next 12 have
2dB attenuation per step, and the following 8 steps
have 3dB attenuation per step. The last position, posi-
tion 33, is the mute setting.
Zero-Crossing Detection
Zero-crossing detection is a user-selectable feature
used to help eliminate clicking or popping noises dur-
ing changes of potentiometer settings. See the
Configuration Register
section to learn how to enable
the zero-crossing detection feature.
After the I
2
C master issues a command to change the
wiper position and the DS1881 has responded with an
acknowledge (ACK) to the command, the DS1881 has
a 50ms window to change the wiper position. The
DS1881 constantly monitors the voltage of the high and
low terminals of both potentiometers. During the 50ms
window, if the zero-crossing detection is enabled, then
each potentiometer’s wiper will change position if the
high and low terminals of the same potentiometer
become equal in potential (i.e., the magnitude of the
input signal is zero). If a zero-crossing event does not
occur within the 50ms window, then the wiper is
allowed to change to the new position regardless of the
state of the input signal. When the zero-crossing detec-
tion feature is not enabled, the DS1881 will allow wiper
movement as soon as the DS1881 has issued the
acknowledge to the master-controlling device.
Table 1. Configuration Option 1
TAP POSITION
0
1
2
3
4
5
6
7
8
…
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
ATTENUATION (dB)
0
1
2
3
4
5
6
7
8
…
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
80
相關PDF資料 |
PDF描述 |
|---|---|
| DS1881E-045R | Dual NV Audio Taper Digital Potentiometer |
| DS1881E-045T | Dual NV Audio Taper Digital Potentiometer |
| DS1881Z-045 | Dual NV Audio Taper Digital Potentiometer |
| DS1881Z-045R | Dual NV Audio Taper Digital Potentiometer |
| DS1881Z-045T | Dual NV Audio Taper Digital Potentiometer |
相關代理商/技術參數 |
參數描述 |
|---|---|
| DS1881E-045R | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual NV Audio Taper Digital Potentiometer |
| DS1881E-045T | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Dual NV Audio Taper Digital Potentiometer |
| DS1881E-050 | 制造商:Maxim Integrated Products 功能描述:DUAL NV 45K AUDIO POT TSSOP-16 - Rail/Tube |
| DS1881E-050/T&R | 制造商:Maxim Integrated Products 功能描述:DUAL NV 45K AUDIO POT TSSOP 16 TRL - Tape and Reel |
| DS1881E-050+ | 功能描述:數字電位計 IC Dual NV Audio Taper RoHS:否 制造商:Maxim Integrated 電阻:200 Ohms 溫度系數:35 PPM / C 容差:25 % POT 數量:Dual 每 POT 分接頭:256 弧刷存儲器:Volatile 緩沖刷: 數字接口: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 安裝風格:SMD/SMT 封裝 / 箱體:TQFN-16 封裝:Reel |
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