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參數(shù)資料
| 型號： | X9269UV24IZ-2.7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | Dual Digitally-Controlled Potentiometers |
| 中文描述： | DUAL 50K DIGITAL POTENTIOMETER, 2-WIRE SERIAL CONTROL INTERFACE, 256 POSITIONS, PDSO24 |
| 封裝： | 4.40 MM, ROHS COMPLIANT, PLASTIC, TSSOP-24 |
| 文件頁數(shù)： | 6/24頁 |
| 文件大?。?/td> | 354K |
| 代理商： | X9269UV24IZ-2.7 |
6
FN8173.4
April 17, 2007
PRINCIPLES OF OPERATION
The X9269 is a integrated microcircuit incorporating
four resistor arrays and their associated registers and
counters and the serial interface logic providing direct
communication between the host and the digitally
controlled potentiometers. This section provides detail
description of the following:
– Resistor Array Description
– Serial Interface Description
– Instruction and Register Description.
Array Description
The X9269 is comprised of a resistor array (See Figure
1). 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
H
and R
L
inputs).
At both ends of each array and between each resistor
segment is a CMOS switch connected to the wiper
(R
W
) output. 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).
The WCR may be written directly. These Data
Registers can the WCR can be read and written by the
host system.
Power-up and Down Requirements.
There are no restrictions on the power-up or power-
down conditions of V
CC
and the voltages applied to
the potentiometer pins provided that V
CC
is always
more positive than or equal to V
H
, V
L
, and V
W
, i.e.,
V
CC
≥
V
H
, V
L
, V
W
. The V
CC
ramp rate specification is
always in effect.
Figure 1. Detailed Potentiometer Block Diagram
SERIAL DATA PATH
FROM INTERFACE
CIRCUITRY
REGISTER 0
(DR0)
REGISTER 1
(DR1)
REGISTER 2
(DR2)
REGISTER 3
(DR3)
SERIAL
BUS
INPUT
PARALLEL
BUS
INPUT
COUNTER
REGISTER
(WCR)
INC/DEC
LOGIC
UP/DN
CLK
MODIFIED SCL
UP/DN
R
H
R
L
R
W
8
8
C
O
U
N
T
E
R
D
E
C
O
D
E
IF WCR = 00[H] THEN R
W
= R
L
IF
WCR = FF[H]
THEN
R
W
=
R
H
WIPER
One of Two Potentiometers
X9269
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| X9269UV24T1 | 功能描述:IC XDCP DUAL 256TAP 50K 24-TSSOP RoHS:否 類別:集成電路 (IC) >> 數(shù)據(jù)采集 - 數(shù)字電位器 系列:XDCP™ 標準包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數(shù):1 溫度系數(shù):標準值 ±300 ppm/°C 存儲器類型:非易失 接口:I²C（設備位址） 電源電壓:2.7 V ~ 5.5 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) |
| X9271 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Single Supply/Low Power/256-Tap/SPI Bus |
| X9271-2.7 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Single Supply/Low Power/256-Tap/SPI Bus |
| X9271TB | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Single Digitally-Controlled (XDCP) Potentiometer |
| X9271TB-2.7 | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Single Digitally-Controlled (XDCP) Potentiometer |
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