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參數(shù)資料
| 型號： | X9318 |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | Digitally Controlled Potentiometer (XDCP)(單DCP,抽頭位置掉電自動保存,高輸出端電壓,可部分替代X9312W) |
| 中文描述： | 數(shù)控電位器（數(shù)字電位器）（單應(yīng)課稅品許可證，抽頭位置掉電自動保存，高輸出端電壓，可部分替代X9312W） |
| 文件頁數(shù)： | 2/22頁 |
| 文件大小： | 269K |
| 代理商： | X9318 |
2 of 22
AN 139
Application Note
www.xicor.com
January, 2001
I. THEORY OF OPERATION
Digitally Controlled Potentiometer
The Xicor XDCP device is a potentiometer whose wiper
position is computer or digitally controlled. The XDCP
device also has memory where wiper settings and/or
data can be stored. It is an analog-digital or mixed-
signal, system level control device performing a compo-
nent level function.
The block diagram of a typical XDCP IC is shown in
Figure 1. The analog potentiometer is a variable three-
terminal, resistive-like device whose wiper is controlled
using one of three different serial buses. An example is
the 3-wire bus. The control signals for the 3-wire bus are
Up/Down (U/D), Increment (INC), and Device or Chip
Select (CS). The U/D input establishes the direction of
the wiper, the INC input advances the wiper, and the CS
input enables the device. One common way of using the
potentiometer is as a programmable voltage divider.
Figure 1: Digitally Controlled Potentiometer
Switching Power Supply
This section provides an overview of the reference
power supply design. It serves as a platform to under-
stand the operation at the component level as described
in the
Detailed Circuit Description, Section II
.
The reference design accepts either a 120Vac or 240Vac
(switch selectable), 47Hz to 63Hz input power and
delivers a regulated 12Vdc at 10A. The input voltage
range is 100Vac to 132Vac or 200Vac to 264Vac. The
output is a constant 12Vdc over the output current range
of 0.5A to 10A. A minimum load of 0.5A is necessary
for proper operation. Overcurrent protection will limit
the output current to just over 10A.
Front End
Refer to the Block Diagram in Figure 2. AC input line,
neutral and ground are connected to the Front End termi-
nals L, N and G respectively. The Front End includes
fuse protection, EMI filtering, input surge protection,
rectification, AC input voltage range switch selection
and DC capacitive energy storage and filtering. The
Front End output is an unregulated nominal 320Vdc.
The Front End output serves as the input to the Power
Mesh.
V
H
/R
H
V
SS
(Ground)
V
W
/R
W
V
L
/R
L
Control
and
Memory
Up/Down
(U/D)
V
CC
(Supply Voltage)
Increment
(INC)
Device Select
(CS)
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| X9318WP8 | 功能描述:IC XDCP 100-TAP 10K 8-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 接片:32 電阻（歐姆）:50k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 50 ppm/°C 存儲器類型:易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 供應(yīng)商設(shè)備封裝:TSOT-23-6 包裝:帶卷 (TR) |
| X9318WP8I | 功能描述:IC XDCP 100-TAP 10K 8-DIP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 接片:32 電阻（歐姆）:50k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 50 ppm/°C 存儲器類型:易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 供應(yīng)商設(shè)備封裝:TSOT-23-6 包裝:帶卷 (TR) |
| X9318WP8IZ | 功能描述:IC XDCP 100-TAP 10K 8-PDIP RoHS:是 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 接片:256 電阻（歐姆）:100k 電路數(shù):2 溫度系數(shù):標(biāo)準(zhǔn)值 35 ppm/°C 存儲器類型:易失 接口:6 線串行（芯片選擇，遞增，增/減） 電源電壓:2.6 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) |
| X9318WS8 | 功能描述:IC XDCP 100-TAP 10K 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 接片:32 電阻（歐姆）:50k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 50 ppm/°C 存儲器類型:易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 供應(yīng)商設(shè)備封裝:TSOT-23-6 包裝:帶卷 (TR) |
| X9318WS8I | 功能描述:IC XDCP 100-TAP 10K 8-SOIC RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,500 系列:- 接片:32 電阻（歐姆）:50k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 50 ppm/°C 存儲器類型:易失 接口:3 線串行（芯片選擇，遞增，增/減） 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 細(xì)型，TSOT-23-6 供應(yīng)商設(shè)備封裝:TSOT-23-6 包裝:帶卷 (TR) |
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