參數(shù)資料
型號(hào)： TL034AMN
廠商： Texas Instruments, Inc.
元件分類： 運(yùn)動(dòng)控制電子
英文描述： ENHANCED-JFET LOW-POWER LOW-OFFSET OPERATIONAL AMPLIFIERS
中文描述： 增強(qiáng)型場(chǎng)效應(yīng)低功耗低失調(diào)運(yùn)算放大器
文件頁(yè)數(shù)： 51/56頁(yè)
文件大?。?/td> 887K
代理商： TL034AMN
TL03x, TL03xA, TL03xY
ENHANCED-JFET LOW-POWER LOW-OFFSET
OPERATIONAL AMPLIFIERS
SLOS180B – FEBRUARY 1997 – REVISED FEBRUARY 1999
51
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
4-mA to 20-mA current loops
Often, information from an analog sensor must be sent over a distance to the receiving circuitry. For many
applications, the most feasible method involves converting voltage information to a current before transmission.
The following circuits give two variations of low-power current loops. The circuit in Figure 66 requires three wires
from the transmitting to receiving circuitry, while the second variation in Figure 67 requires only two wires, but
includes an extra integrated circuit. Both circuits benefit from the high input impedance of the TL03xA because
many inexpensive sensors do not have low output impedance.
Assuming that the voltage at the noninverting input of the TL03xA is zero, the following equation determines
the output current:
IO
VI
R3
R1
RS
5V
R3
R2
RS
0.16
VI
4mA
The circuits presently provide 4-mA to 20-mA output current for an input voltage of 0 to 100 mV. By modifying
R1, R2, and R3, the input voltage range or the output current range can be adjusted.
Including the offset voltage of the operational amplifier in the above equation clearly illustrates why the low offset
TL03xA was chosen:
IO
VI
R3
R1
RS
5V
R3
R2
RS
VI
VI
R3
R1
RS
R3
R2
RS
R1
RS
0.16
VI
4mA – 0.17
For example, an offset voltage of 1 mV decreases the output current by 0.17 mA.
Due to the low power consumption of the TL03xA, both circuits have at least 2 mA available to drive the actual
sensor from the 5-V reference node.
相關(guān)PDF資料
PDF描述
TL034MJ ENHANCED-JFET LOW-POWER LOW-OFFSET OPERATIONAL AMPLIFIERS
TL034Y ENHANCED-JFET LOW-POWER LOW-OFFSET OPERATIONAL AMPLIFIERS
TL034AMD ENHANCED-JFET LOW-POWER LOW-OFFSET OPERATIONAL AMPLIFIERS
TL034AMJ ENHANCED-JFET LOW-POWER LOW-OFFSET OPERATIONAL AMPLIFIERS
TL031AMJG ENHANCED-JFET LOW-POWER LOW-OFFSET OPERATIONAL AMPLIFIERS
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TL034CD 功能描述:運(yùn)算放大器 - 運(yùn)放 Enhanced HFET Lw Pwr RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
TL034CD 制造商:Texas Instruments 功能描述:IC OP AMP QUAD JFET SMD SOIC14
TL034CD 制造商:Texas Instruments 功能描述:IC SM OP-AMP QUAD JFET
TL034CDE4 功能描述:運(yùn)算放大器 - 運(yùn)放 Quad Enhanced JFET Low-Power Precision RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
TL034CDG4 功能描述:運(yùn)算放大器 - 運(yùn)放 Quad Enh JFET Lo- Pwr Prec Op Amp RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補(bǔ)償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-16 轉(zhuǎn)換速度:0.89 V/us 關(guān)閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel
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