參數(shù)資料
型號： TL051MD
廠商： Texas Instruments, Inc.
英文描述： ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
中文描述： 增強(qiáng)型場效應(yīng)低失調(diào)運(yùn)算放大器
文件頁數(shù)： 57/65頁
文件大小： 1022K
代理商： TL051MD
TL05x, TL05xA, TL05xY
ENHANCED-JFET LOW-OFFSET
OPERATIONAL AMPLIFIERS
SLOS178 – FEBRUARY 1997
57
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
precision constant-current source over temperature
A precision current source (see Figure 85) benefits from the high input impedance and stability of Texas
Instruments enhanced-JFET process. A low-current shunt regulator maintains 2.5 V between the inverting input
and the output of the TL05x. The negative feedback then forces 2.5 V across the current setting resistor R;
therefore, the current to the load is simply 2.5 V divided by R.
Possible choices for the shunt regulator include the LT1004, LT1009, and LM385. If the regulator’s cathode
connects to the operational amplifier output, this circuit sources load current. Similarly, if the cathode connects
to the inverting input, the circuit sinks current from the load. To minimize output current change with temperature,
R should be a metal film resistor with a low temperature coefficient. Also, this circuit must be operated with
split-voltage supplies.
+
–
+
–
150 pF
U2
+ 15 V
U1
– 15 V
R
100 k
IO
Load
V = 0 to 10 V
(a) SOURCE CURRENT LOAD
(b) SINK CURRENT LOAD
V = 0 to –10 V
Load
II
R
– 15 V
U1
+ 15 V
150 pF
U2
100 k
NOTE B: U1 = 1/2 TL05x
U2 = LM385, LT1004, or LT1009 voltage reference
I =2R
, R = Low temperature coefficient metal film resistor
Figure 85. Precision Constant-Current Source
相關(guān)PDF資料
PDF描述
TL051MFK ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
TL051MJG ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
TL051MP ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
TL051Y ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
TL052AMD Electrical Duct/Raceway Fitting;
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TL051MFK 制造商:TI 制造商全稱:Texas Instruments 功能描述:ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
TL051MJG 制造商:TI 制造商全稱:Texas Instruments 功能描述:ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
TL051MLB 制造商:Rochester Electronics LLC 功能描述:- Bulk
TL051MP 制造商:TI 制造商全稱:Texas Instruments 功能描述:ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
TL051Y 制造商:TI 制造商全稱:Texas Instruments 功能描述:ENHANCED-JFET LOW-OFFSET OPERATIONAL AMPLIFIERS
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