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OP07DPE4 Fiches technique(PDF) 8 Page - Texas Instruments

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No de pièce OP07DPE4
Description  Precision Operational Amplifiers
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
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OP07DPE4 Fiches technique(HTML) 8 Page - Texas Instruments

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12 V
+
VIN
VOUT
10 k
OUT
VCC
VCC+
IN−
IN+
+
OFFSET N1
3
2
4
7
6
20 k
N2
OFFSET
8
1
OP07C, OP07D
SLOS099G – OCTOBER 1983 – REVISED NOVEMBER 2014
www.ti.com
10 Application and Implementation
10.1 General Application
The input offset voltage of operational amplifiers (op amps) arises from unavoidable mismatches in the
differential input stage of the op-amp circuit caused by mismatched transistor pairs, collector currents, current-
gain betas (
β), collector or emitter resistors, etc. The input offset pins allow the designer to adjust for these
mismatches by external circuitry. These input mismatches can be adjusted by putting resistors or a potentiometer
between the inputs as shown in Figure 2. A potentiometer can be used to fine tune the circuit during testing or for
applications which require precision offset control. More information about designing using the input-offset pins,
see Nulling Input Offset Voltage of Operational Amplifiers (SLOA045).
Figure 2. Input Offset-Voltage Null Circuit
10.2 Typical Application
The voltage follower configuration of the operational amplifier is used for applications where a weak signal is
used to drive a relatively high current load. This circuit is also called a buffer amplifier or unity gain amplifier. The
inputs of an operational amplifier have a very high resistance which puts a negligible current load on the voltage
source. The output resistance of the operational amplifier is almost negligible, so it can provide as much current
as necessary to the output load.
Figure 3. Voltage Follower Schematic
8
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Copyright © 1983–2014, Texas Instruments Incorporated
Product Folder Links: OP07C OP07D


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