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參數(shù)資料
型號(hào)： TSC2111IRGZRG4
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 音頻／視頻放大
英文描述： 0.4 W, 1 CHANNEL, AUDIO AMPLIFIER, QCC48
封裝： PLASTIC, QFN-48
文件頁(yè)數(shù)： 37/99頁(yè)
文件大小： 1143K
代理商： TSC2111IRGZRG4
TSC2111
SLAS495A JUNE 2006 REVISED OCTOBER 2007
www.ti.com
42
Temperature Measurement
In some applications, such as battery charging, a measurement of ambient temperature is required. The
temperature measurement technique used in the TSC2111 relies on the characteristics of a semiconductor
junction operating at a fixed current level. The forward diode voltage (VBE) has a well-defined characteristic
versus temperature. The ambient temperature can be predicted in applications by knowing the 25
°C value of
the VBE voltage and then monitoring the variation of that voltage as the temperature changes.
The TSC2111 offers two modes of temperature measurement. The first mode requires a single reading to
predict the ambient temperature. A diode, as shown in Figure 29, is used during this measurement cycle. This
voltage is typically 600 mV at +25
°C with a 20-A current through it. The absolute value of this diode voltage
can vary a few millivolts. The temperature coefficient of this voltage is typically 2 mV/
°C. During the final test
of the end product, the diode voltage at a known room temperature should be stored in nonvolatile memory.
Further calibration can be done to calculate the precise temperature coefficient of the particular. This method
has a temperature resolution of approximately 0.3
°C/LSB and accuracy of approximately ±2°C with
two-temperature calibration. Figure 30 and Figure 31 shows typical plots with single and two-temperature
calibration respectively.
TEMP0
TEMP1
Temperature Select
X+
MUX
A/D
Converter
Figure 29. Functional Block Diagram of Temperature Measurement Mode
10
8
6
4
2
0
2
4
6
8
10
40
20
0
20
40
60
80
100
Error
in
Measurement
TA Free-Air Temperature 5C
C
°
Figure 30. Typical Plot of Single Measurement Method After Calibrating for Offset at Room Temperature
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TSC2111IRGZT 功能描述:觸摸屏轉(zhuǎn)換器和控制器 SMART 4-Wire with Audio RoHS:否 制造商:Microchip Technology 類(lèi)型:Resistive Touch Controllers 輸入類(lèi)型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類(lèi)型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20
TSC2111IRGZTG4 功能描述:觸摸屏轉(zhuǎn)換器和控制器 SMART 4-Wire with Audio RoHS:否 制造商:Microchip Technology 類(lèi)型:Resistive Touch Controllers 輸入類(lèi)型:3 Key 數(shù)據(jù)速率:140 SPS 分辨率:10 bit 接口類(lèi)型:4-Wire, 5-Wire, 8-Wire, I2C, SPI 電源電壓:2.5 V to 5.25 V 電源電流:17 mA 工作溫度:- 40 C to + 85 C 封裝 / 箱體:SSOP-20
TSC-2-1-15 制造商:Micrel Inc 功能描述:
TSC2117 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:Low-Power Audio Codec With Embedded miniDSP, Stereo Class-D Speaker Amplifier, and Smart Four-Wire Touch-Screen Controller
TSC2117EVM-K 功能描述:音頻 IC 開(kāi)發(fā)工具 TSC2117 Eval Mod RoHS:否 制造商:Texas Instruments 產(chǎn)品:Evaluation Kits 類(lèi)型:Audio Amplifiers 工具用于評(píng)估:TAS5614L 工作電源電壓:12 V to 38 V
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