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TLE2425

更新时间： 2024-11-23 08:44:59
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德州仪器 - TI /
页数 文件大小 规格书
16页 232K
描述
PRECISION VIRTUAL GROUND

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TLE2425 数据手册

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TLE2425  
PRECISION VIRTUAL GROUND  
SLOS065D – MARCH 1991 – REVISED APRIL 2002  
2.5-V Virtual Ground for 5-V/GND Analog  
Systems  
Excellent Regulation Characteristics  
– Output Regulation  
–45 µV Typ at I = 0 to –10 mA  
O
High Output-Current Capability  
Sink or Source . . . 20 mA Typ  
+15 µV Typ at I = 0 to +10 mA  
O
– Input Regulation = 1.5 µV/V Typ  
Low-Impedance Output . . . 0.0075 Ω Typ  
Macromodel Included  
Micropower Operation . . . 170 µA Typ  
description  
OUTPUT REGULATION  
100  
In signal-conditioning applications using a single  
power source, a reference voltage is required for  
termination of all signal grounds. To accomplish  
this, engineers have typically used solutions  
consisting of resistors, capacitors, operational  
amplifiers, and voltage references. Texas Instru-  
ments has eliminated all of those components  
with one easy-to-use 3-terminal device. That  
device is the TLE2425 precision virtual ground.  
V = 5 V  
I
80  
60  
T
= –40°C  
A
T
A
= 0°C  
40  
T
A
= –55°C  
20  
0
T
A
= 125°C  
T
= 25°C  
A
T
A
= 25°C  
–20  
Use of the TLE2425 over other typical circuit  
solutions gives the designer increased dynamic  
signal range, improved signal-to-noise ratio,  
lower distortion, improved signal accuracy, and  
easier interfacing to ADCs and DACs. These  
benefits are the result of combining a precision  
micropower voltage reference and a high-perfor-  
mance precision operational amplifier in a single  
silicon chip. It is the precision and performance of  
these two circuit functions together that yield such  
dramatic system-level performance.  
–40  
–60  
T
= 125°C  
A
T
A
= –55°C  
–80  
–100  
–8 –6 –4 –2  
0
2
4
8
10  
–10  
6
I
– Output Current – mA  
O
The TLE2425 improves input regulation as well as output regulation and, in addition, reduces output impedance  
and power dissipation in a majority of virtual-ground-generation circuits. Both input regulation and load  
regulation exceed 12 bits of accuracy on a single 5-V system. Signal-conditioning front ends of data acquisition  
systems that push 12 bits and beyond can use the TLE2425 to eliminate a major source of system error.  
AVAILABLE OPTIONS  
PLASTIC  
TO-226AA  
(LP)  
SMALL OUTLINE  
T
A
(D)  
0°C to 70°C  
–40°C to 85°C  
–55°C to 125°C  
TLE2425CD  
TLE2425ID  
TLE2425MD  
TLE2425CD  
TLE2425ID  
—
†
The D package is available taped and reeled. Add R suffix to  
the device type (e.g., TLE2425CDR).  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
Copyright 2002, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251–1443  
1234567...16

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