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參數(shù)資料
| 型號(hào)： | X9252WV24IZ-2.7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計(jì) |
| 英文描述： | KIT RF SHIELD LARGE MULTI-HEIGHT |
| 中文描述： | QUAD 10K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO24 |
| 封裝： | ROHS COMPLIANT, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 10/21頁 |
| 文件大小： | 126K |
| 代理商： | X9252WV24IZ-2.7 |
X9252
10 of 21
REV 1.4.1 7/29/03
www.xicor.com
PRINCIPLES OF OPERATION
The X9252 is an integrated circuit incorporating four
resistor arrays, their associated registers and counters,
and the serial interface logic providing direct communi-
cation between the host and the digitally controlled
potentiometers. This section provides detail description
of the following:
– Resistor Array
– Up/Down Interface
– 2-wire Interface
Resistor Array Description
The X9252 is comprised of four resistor arrays. Each
array contains 255 discrete resistive segments that are
connected in series. The physical ends of each array
are equivalent to the fixed terminals of a mechanical
potentiometer (R
Hi
and R
Li
inputs). (See Figure 1.)
At both ends of each array and between each resistor
segment is a switch connected to the wiper (R
Wi
) pin.
Within each individual array only one switch may be
turned on at a time.
These switches are controlled by a Wiper Counter
Register (WCR). The 8-bits of the WCR (WCR[7:0])
are decoded to select and enable one of 256 switches
(see Table 1). Note that each wiper has a dedicated
WCR. When all bits of a WCR are zeroes, the switch
closest to the corresponding R
L
pin is selected. When
all bits of a WCR are ones, the switch closest to the
corresponding R
H
pin is selected.
The WCR is volatile and may be written directly. There
are four non-volatile Data Registers(DR) associated
with each WCR. Each DR can be loaded into WCR. All
DRs and WCRs can be read or written.
Power Up and Down Requirements
During power up, CS must be high, to avoid inadvert-
ant “store” operations. At power up, the contents of
Data Registers DR00, DR10, DR20, and DR30, are
loaded into the corresponding wiper counter register.
Figure 1. Detailed Block Diagram of one DCP
One
of
256
WCR[7:0]
= FF hex
R
Hi
R
Wi
R
Li
255
254
253
252
Decoder
Volatile
8-bit
Wiper
Counter
Register
WCRi
Four
Non-Volatile
Data
Registers
DRi0, DRi1,
DRi2, and
DRi3
i = 0, 1, 2, and 3
Interface Control and
Volatile Status Register (SR)
WCR[7:0]
= 00 hex
2
1
0
(Shared by the Four DCPs)
WP
SCL
SDA
A2, A1, A0
CS
U/D
DS1, DS0
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| X9252YV24IZ-2.7 | 功能描述:IC POT DGTL QUAD 24-TSSOP 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:1 系列:- 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標(biāo)準(zhǔn)值 35 ppm/°C 存儲(chǔ)器類型:非易失 接口:3 線串口 電源電壓:2.7 V ~ 5.25 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-WDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-TDFN-EP（3x3） 包裝:剪切帶 (CT) 產(chǎn)品目錄頁面:1399 (CN2011-ZH PDF) 其它名稱:MAX5423ETA+TCT |
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