- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄360865 > INA330AIDGST THERMISTOR SIGNAL AMPLIFIER FOR TEMPERATURE CONTROL PDF資料下載
參數(shù)資料
| 型號(hào)： | INA330AIDGST |
| 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)： | 8/14頁 |
| 文件大?。?/td> | 245K |
| 代理商： | INA330AIDGST |
INA330
SBOS260
8
www.ti.com
INA330 PIN 5
Pin 5 of the INA330 should be connected to V+ to ensure
proper operation.
COMPLETE TEMPERATURE CONTROLLER
See Figure 6 for a complete temperature control loop with a
TEC (thermoelectric cooler) for cooling and heating. PID
(proportional, integral, differential) control circuitry is shown
for loop compensation and stability.
The loop controls temperature to an adjustable set-point of
22.5
°
C to 27.5
°
C. The nominal 10k
at 25
°
C thermistor
ranges from approximately 11.4k
to 8.7k
over this range.
A 1V excitation voltage is applied to V
1
and V
2
, producing a
nominal 100
μ
A current in the 10k
R
SET
resistor. The ther-
The INA330 is designed and tested for amplifying 10k
thermistor signals used in the control of thermoelectric
coolers for optical networking applications. The simplified
schematic in Figure 5 shows the basic function of the
INA330. An excitation voltage is applied as V
1
and V
2
.
Typically, these voltages are equal. They generate cur-
rents I
1
and I
2
in the thermistor and R
SET
resistor.
Auto-corrected current mirror circuitry around A
1
and A
2
produce an output current, I
O
, equal to the difference
A1
V+
Enable
Current Mirror
Current Mirror
I
2
I
2
I
2
R
SET
R
THERM
R
G
C
FILTER
V
O
V
2
V
1
I
2
I
O
I
1
–
I
2
I
O
=
I
1
–
I
2
I
O
A3
A2
V
ADJUST
Current Mirror
Current Mirror
9
5
6
8
7
4
3
10
1
2
INA330
I
1
current I
1
–
I
2
. The gain is set by the value of R
G
. The
output voltage, V
O
, is the voltage resulting from I
O
flowing
through R
G.
The INA330 uses internal charge pumps to create volt-
ages beyond the power-supply rails. As a result, the
voltage on R
G
can actually swing 20mV below the nega-
tive power-supply rail, and 100mV beyond the positive
supply rail. An internal oscillator has a frequency of
90kHz and accuracy of
±
20%.
INSIDE THE INA330
FIGURE 5. INA330 Simplified Schematic.
mistor current is approximately 100
μ
A at 25
°
C, but will vary
above or below this value over the
±
2.5
°
C set-point tempera-
ture range. The difference of these two currents flows in the
gain-set resistor, R
G
. This produces a voltage output of
approximately 0.9V/
°
C.
The set-point temperature is adjusted with V
ADJ
. Thus, the
voltage at V
O
is the sum of (I
O
)(R
G
) + V
ADJ
. V
ADJ
can be
manually adjusted or set with a Digital-to-Analog (D/A) con-
verter. Optionally, set-point temperature can be adjusted by
choosing a different fixed value resistor more closely ap-
proximating the value of R
THERM
at the desired temperature.
The noninverting input of the integrator in the PID compen-
sation is connected to V
BIAS
. Thus, the feedback loop will
drive the heating or cooling of the TEC to force V
O
to equal
V
BIAS
. V
ADJ
= 2.5V will produce a set-point temperature of
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| INITIALPROGRAM | EM73201/EM73E00/EM73PE00 Application Note |
| INITIALTIMERPERIOD | EM56/57 - Speech & Music Synthesizer - Application Note - Application Note |
| INS1671D | USART |
| INS1671N | USART |
| INS1771N-1 | Floppy Disk Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| INA331 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:Low-Power, Single-Supply, CMOS INSTRUMENTATION AMPLIFIERS |
| INA331AIDGKR | 功能描述:儀表放大器 Lo-Pwr Single Sply CMOS RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
| INA331AIDGKRG4 | 功能描述:儀表放大器 Lo-Pwr Single Sply CMOS RoHS:否 制造商:Texas Instruments 通道數(shù)量: 輸入補(bǔ)償電壓:150 V 可用增益調(diào)整: 最大輸入電阻:10 kOhms 共模抑制比（最小值）:88 dB 工作電源電壓:2.7 V to 36 V 電源電流:200 uA 最大工作溫度:+ 125 C 最小工作溫度:- 40 C 封裝 / 箱體:MSOP-8 封裝:Bulk |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。