LT1013_16 Datasheet, PDF (17/36 Pages) Texas Instruments – Dual Precision Operational Amplifier

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7 Detailed Description
LT1013, LT1013D, LT1013M, LT1013AM
SLOS018I – MAY 1988 – REVISED JULY 2016
7.1 Overview
The LT1013x device is a dual operational amplifier with low natural V_IO without programming memory that can be
erased. There are no side effects from active V_IO correction used by other op amps. The LT1013x has built-in
protection for input voltage below V_CC–. However, an external resistance must be add to protect the LT1013x
from input voltage greater than V_CC+.
7.2 Functional Block Diagram
VCC+
9 kΩ 9 kΩ 1.6 kΩ
1.6 kΩ 1.6 kΩ
100 Ω 1 kΩ
800 Ω
Q5
Q36
Q6
Q13
Q16
Q14
Q15 Q32
Q35
Q30
Q1
400 Ω
IN−
Q21
Q2
400 Ω
IN+
Q22
VCC−
Component values are nominal.
Q3
Q4
3.9 kΩ
Q27
2.5 pF
21 pF
Q28
Q12
Q11
Q9
Q29
Q8
Q7
75 pF
5 kΩ 5 kΩ
Q18
Q10
Q19
10 pF
Q17
2 kΩ
Q20
1.3 kΩ
Q25
Q37
Q33
2.4 kΩ
Q26
18 Ω
14 kΩ
OUT
J1
Q41
Q38
4 pF
Q31
Q39
Q40
2 kΩ
Q34
10 pF
Q23
Q24
2 kΩ
42 kΩ
30 Ω
600 Ω
Copyright © 2016, Texas Instruments Incorporated
7.3 Feature Description
7.3.1 Input Resistors
For voltages less than V_CC–, a pair of 400-Ω resistors limit input current. These resistors have parasitic diodes to
VCC+. Therefore, external series resistance is needed if input voltage exceed V_CC+
7.3.2 Output Stage
High output is provided by Q33 emitter for low output impedance. Q26 provides active current limiting for
sourcing current.
Low output is provided by Q34 collector for lower output voltage near V_CC– rail. Q24 provides active current
limiting for sinking current.
Copyright © 1988–2016, Texas Instruments Incorporated
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Product Folder Links: LT1013 LT1013D LT1013M LT1013AM