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參數(shù)資料
| 型號： | X9C503 |
| 元件分類： | 數(shù)字電位計 |
| 英文描述： | EEPOT Nonvolatile Digital Potentiometer(100個抽頭,-5V~+5V,50K總電阻,非易失性數(shù)字電位器) |
| 中文描述： | EEPOT非易失數(shù)字電位器（100個抽頭，- 5V的?5V的，50K的總電阻，非易失性數(shù)字電位器） |
| 文件頁數(shù)： | 3/8頁 |
| 文件大小： | 87K |
| 代理商： | X9C503 |
Xicor Application Note
AN120-3
AN120
100Hz
.022
μ
R
5
24k
-5V
10k
R
2
V
W
V
H
+5V
Platinum
RTD
(100
@ 0
°
C)
+0.385%/
°
C
R
T
R
1
4870
+5V
249k
3
6
7
5110
3
4
-5
5
A
1
AD822
3
2
–
+
A
2
–
+
9
S
3
+5V
5
100pF
.001
+5V
U/D
CS
P
1
4
7
12
X9C102
P2
S
2
R
9
R
8
P
2
CALIBRATION/ADJ DATA
6
T
OUT
1k
S
1
C
1
10k
R
4
274k
5
.1
7
4
AD822
Acquire T
0
10
6
0
74HC4053
Oscillator
~10mV/
°
C
INC
1
P
1
200K
+9.625
@ 25
°
C
0
°
C
≤
to
≤
50
°
C
V
L
1
sec
1
R
3
2
16
8
+5
200K
8
13
1k
"0" = Output (T-T
0
)
"1" = Acquires T
0
improvement in measurement resolution can be gained
from the scale expansion made possible by acquisition of
the initial baseline temperature and subtracting it from
subsequent measurements before analog to digital
conversion.
Figure
3
presents
thermometric
circuit
that
automatically using digitally controlled potentiometers as
the baseline temperature memory.
an
auto-nulling
this
function
performs
The basis for temperature sensing in this circuit is Rt, a
standard 100ohm @ 25°C Pt RTD. Such devices have a
highly stable and accurate tempco of +0.385ohm/°C.
Therefore the -lmA of excitation current provided by R1
leads to a temperature-dependent signal of ~385uV/1°C.
R2, P1, and R3 complete a ratiometric bridge with A1 as
the bridge amplifier. The feature of the circuit that utilizes
the ability of digitally-controlled-pot’s to act as feedback
elements is the process that automatically captures and
holds the initial reference temperature that is subtracted
from subsequent readings. Acquisition of a reference
temperature is initiated by bringing the 5V logic signal
ACQUIRE low. This causes S3 to open the feedback loop
around A1 and simultaneously enables the S1-S2
multivibrator. The result is to cause P1 to sample A1’s
output at a 100Hz rate and drive A1 toward null.
Figure 3. Autonulling ‘
D
T” Thermometer—Detailed
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| X9C503DI | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Potentiometer |
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| X9C503P | 功能描述:IC DIGITAL POT 50K 100TP 8DIP 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(biāo)準(zhǔn)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(biāo)準(zhǔn)值 ±300 ppm/°C 存儲器類型:非易失 接口:I²C（設(shè)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(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) |
| X9C503PI | 功能描述:IC DIGITAL POT 50K 100TP 8DIP 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(biāo)準(zhǔn)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(biāo)準(zhǔn)值 ±300 ppm/°C 存儲器類型:非易失 接口:I²C（設(shè)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(yīng)商設(shè)備封裝:14-TSSOP 包裝:帶卷 (TR) |
| X9C503PIZ | 功能描述:IC XDCP 100-TAP 50K EE 8-DIP 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) |
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