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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)： | 8/8頁 |
| 文件大?。?/td> | 87K |
| 代理商： | X9C503 |
Xicor Application Note
AN120-8
AN120
On each measurement cycle, A1’s lower input pair
samples the bridge output. Depending on the result of the
comparison, they tend to drive the pin 4 output bit to 0 or
1, as the bridge reports an RTD-setpoint differential that’s
negative or positive. Thus, the solid-state relay (SSR) and
heater will most likely turn on when the temperature is low
and off when it’s high.
To make the resulting on/off heater drive have an average
duty-factor that’s nicely proportional to the magnitude of
the temperature error signal and not just a simple “bang-
bang” relationship, the bridge output voltage is summed
with a triangular dither signal produced by P2. The
combination of P2 and U2 causes P2 to output one full
triangular dither waveform every 128 measurement
cycles.
Thermal inertia of the hearer and the thermal load
averages over the heater cycle rate (1 Hz in this example).
Consequently, suitable selection of the R6-C1 oscillator
RC will avoid significant temperature ripple. R2 adjusts the
amplitude of the P2 dither signal and thereby sets the
effective controller P-term gain that relates heater duty
factor to temperature error to get adequate control loop
“stiffness” without oscillation.
Meanwhile, error integrator A2 + P1 also samples the
temperature difference signal. The integration sampling
frequency, and therefore the integrator time constant, is
set by the choice of which U2 output bit is connected to
P1’s clock. This arrangement causes the integrator to take
one step in the direction of zero setpoint error every 1, 2,
4, 8, 16, 32, 64, or 128 heater dither cycles. As a result, it
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| 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) |
| 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) |
| 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)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:2,500 系列:- 接片:256 電阻（歐姆）:100k 電路數(shù):2 溫度系數(shù):標準值 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） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) |
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