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參數資料
| 型號： | X9241 |
| 元件分類： | 數字電位計 |
| 英文描述： | Quad EEPOT Nonvolatile Digital Potentiometer(4個EEPOT,二線串行接口,直接寫入/讀出滑動端位置,非易失性數字電位器) |
| 中文描述： | 四EEPOT非易失數字電位器（4個EEPOT，二線串行接口，直接寫入/讀出滑動端位置，非易失性數字電位器） |
| 文件頁數： | 1/4頁 |
| 文件大小： | 135K |
| 代理商： | X9241 |
Application Note
1 of 4
www.xicor.com
July, 2002
AN50
Op Amp Gain and Offset Trim using
XICOR Digitally Controlled Potentiotiometers (XDCPs)
by Applications Staff
Many system configurations require multiple trans-
ducers to be normalized for gain or offset, prior to further
A to D conversion or signal processing. The Xicor
X9241A quad XDCPs can provide an elegant and effi-
cient solution for performing these tasks under
microprocessor control.
The configuration in Figure 1shows two dual op amps
being controlled by a single quad XDCP. The gain range
in this configuration can be trimmed between -0.5 to -2.0
over 64 steps. Increasing R5 and R6 (the feedback deter-
mining network in U2a for example) to 100K
change the gain trim range to between -0.91 to -1.1. The
inverting configuration shown is particularly suitable as
this allows input signals to vary from ±6V without
violating the digital pots terminal voltage specifications
of +5V/-3V.
will
An offset trimming configuration is shown in Figure 2
for the same pair of dual op amps. This configuration
yields an offset trimming range of ±300mV over 64
steps. The offset range can be increased or decreased by
changing the value of R13 (in amplifier U2a for
example). Changing R13 to 1M
offset range to ±40mV if finer resolution, but less range
is desired. This configuration also ensures that the
will decrease the
X9241A is operating within the specified terminal
voltage range of less than +5V/-3V.
Potpourri Amplifier
Figure 3 illustrates a microprocessor controlled circuit
that can provide adjustable gain from -1 to infinity with
two of the pots of the quad X9241AW XDCP. The other
two pots can be ganged together using the cascade mode
for extended offset range. The purpose of this circuit is
not to solve a particular analog signal processing
problem, but rather to demonstrate the analog control
flexibility that can be attained with the X9241A.
With R2 set to 0 and R1 set to 63, the overall gain from
input to output will be -1. Gain values in the range 0 to
-1 can be set over 64 steps by incrementing the value of
R1. Setting R1 back to 0 and setting R2 to 32 results in
an overall gain of +1. Increasing R2 to 63 yields a gain of
plus infinity. This is essentially a positive comparator
with the threshold level being set by the cascade combi-
nation of R0 and R3. National Semiconductor’s
LMC6482 is a nice amplifier for this application because
of its rail-to-rail input and output range.
相關PDF資料 |
PDF描述 |
|---|---|
| X9250TV24-2.7 | Quad Digitally Controlled Potentiometers (XDCP) |
| X9250TV24I | Quad Digitally Controlled Potentiometers (XDCP) |
| X9250TV24I-2.7 | Quad Digitally Controlled Potentiometers (XDCP) |
| X9250UB24 | Quad Digitally Controlled Potentiometers (XDCP) |
| X9250UB24-2.7 | Quad Digitally Controlled Potentiometers (XDCP) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| X9241A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Quad Digital Controlled Potentionmeters (XDCP?) |
| X9241A_06 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Quad Digital Controlled Potentionmeters (XDCP⑩) |
| X9241A_07 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Quad Digital Controlled Potentionmeters (XDCP?) |
| X9241AMP | 功能描述:IC XDCP QUAD 2/10/10/50K 20-D RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:XDCP™ 標準包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數:1 溫度系數: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) |
| X9241AMPI | 功能描述:IC XDCP QUAD 2/10/10/50K 20-D RoHS:否 類別:集成電路 (IC) >> 數據采集 - 數字電位器 系列:XDCP™ 標準包裝:2,500 系列:XDCP™ 接片:256 電阻（歐姆）:100k 電路數:1 溫度系數: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) |
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