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TLC27L1IDRG4 Datasheet(PDF) 23 Page - Texas Instruments

Part No. TLC27L1IDRG4
Description  LinCMOSE LOW-POWER OPERATIONAL AMPLIFIERS
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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TLC27L1IDRG4 Datasheet(HTML) 23 Page - Texas Instruments

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TLC27L1, TLC27L1A, TLC27L1B
LinCMOS LOW POWER
OPERATIONAL AMPLIFIERS
SLOS154B− DECEMBER 1995 − REVISED JUNE 2005
23
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
single-supply operation (continued)
(b) SEPARATE BYPASSED SUPPLY RAILS (preferred)
(a) COMMON SUPPLY RAILS
Logic
Logic
Logic
Power
Supply
Supply
Power
Logic
Logic
Logic
OUT
OUT
Figure 39. Common Versus Separate Supply Rails
input offset voltage nulling
The TLC27L1 offers external input-offset null control. Nulling of the input-offset voltage may be achieved by
adjusting a 25-k
Ω potentiometer connected between the offset null terminals with the wiper connected as shown
in Figure 40. Total nulling may not be possible.
25 k
N2
VDD
N2
N1
25 k
GND
(a) SINGLE SUPPLY
(b) SPLIT SUPPLY
+
+
N1
OUT
OUT
IN −
IN +
IN −
IN +
Figure 40. Input Offset-Voltage Null Circuit
input characteristics
The TLC27L1 is specified with a minimum and a maximum input voltage that, if exceeded at either input, could
cause the device to malfunction. Exceeding this specified range is a common problem, especially in
single-supply operation. Note that the lower range limit includes the negative rail, while the upper range limit
is specified at VDD − 1 V at TA = 25°C and at VDD − 1.5 V at all other temperatures.


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