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參數(shù)資料
| 型號(hào)： | INA330 |
| 元件分類： | 熱敏電阻 |
| 英文描述： | THERMISTOR SIGNAL AMPLIFIER FOR TEMPERATURE CONTROL |
| 中文描述： | 熱敏電阻溫度控制信號(hào)放大器 |
| 文件頁數(shù)： | 11/14頁 |
| 文件大?。?/td> | 245K |
| 代理商： | INA330 |
INA330
SBOS260
11
www.ti.com
FIGURE 10. Digitally Compensated Loop.
FIGURE 11. Traditional Bridge Circuit.
DIGITALLY COMPENSATED LOOP
The PID compensation can be replaced with a microcontroller
or DSP, as shown in Figure 10. An Analog-to-Digital (A/D)
converter would be used to digitize the output of the INA330.
The analog PID provides sufficient filtering inherently, and,
therefore requires no additional filtering. The digital control
loop shown in Figure 10 does not provide this inherent
filtering, requiring additional output filtering (R
O
and C
O
) as
shown to avoid sampling the internal chopping noise of the
INA330 and the A/D converter input and affecting accuracy.
High-frequency noise is created by internal auto-correction
circuitry and is highly dependent on the filter characteristics
chosen.
“
Spurs
”
occur at approximately 90kHz and its har-
monics which is reduced by additional filtering at or below
1kHz. This may be the dominant source of noise visible when
viewing the output on an oscilloscope. Low cutoff frequency
filters will provide lowest noise.
TRADITIONAL BRIDGE CIRCUIT
The traditional bridge circuit (Figure 11) uses three matched
resistors and a thermistor to detect temperature changes.
The INA326 and INA327 instrumentation amplifiers are well
suited to a bridge implementation for thermistor measure-
ment.
INA330
DSP
Loop Compensation
is performed in DSP.
TEC
+5V
Enable
+5V
R
SET
10k
R
200k
R
THERM
C
500pF
V
0V to 5V
D/A
Converter
Temp
Adjust
Ref
R
O
100
C
O
1
μ
F
A/D
Converter
D/A
Converter
+1V
V
2
V
1
3
2
9
5
6
8
7
5k
10k
(2)
10k
(1)
10k
(1)
10k
at set-point
temperature.
NOTES: (1) Requires ratio matching tracking.
(2) Requires absolute accuracy and stability.
V
EXCITE
PID CONTROLLER
INA326
+5V
100k
V
2.5V
1nF
V
ADJ
D/A
Converter
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| INA330AIDGSR | 功能描述:差分放大器 Thermistor Signal for Temp Control RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| INA330AIDGSRG4 | 功能描述:差分放大器 Thermistor Signal for Temp Control RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| INA330AIDGST | 功能描述:差分放大器 Thermistor Signal for Temp Control RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
| INA330AIDGST | 制造商:Texas Instruments 功能描述:IC AMP INST SMD VSSOP10 330 |
| INA330AIDGSTG4 | 功能描述:差分放大器 Thermistor Signal for Temp Control RoHS:否 制造商:Texas Instruments 通道數(shù)量:1 Channel 帶寬:2.4 GHz 可用增益調(diào)整:6 dB to 26 dB 輸入補(bǔ)償電壓: 共模抑制比（最小值）:- 40 dB 工作電源電壓:4.75 V to 5.25 V 電源電流:100 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WQFN-24 封裝:Reel |
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