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LM4040CIM3-2.0 Datasheet(PDF) 35 Page - Texas Instruments

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Part No. LM4040CIM3-2.0
Description  LM4040-N/-Q1 Precision Micropower Shunt Voltage Reference
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LM4040CIM3-2.0 Datasheet(HTML) 35 Page - Texas Instruments

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IN _ MIN
OUT
S _ MAX
LOAD _ MAX
R _ MIN
V
V
R
I
I
-
=
+
IN _ MAX
OUT
S _ MIN
LOAD _ MIN
R _ MAX
V
V
R
I
I
-
=
+
35
LM4040-N, LM4040-N-Q1
www.ti.com
SNOS633K – OCTOBER 2000 – REVISED JUNE 2016
Product Folder Links: LM4040-N LM4040-N-Q1
Submit Documentation Feedback
Copyright © 2000–2016, Texas Instruments Incorporated
Typical Applications (continued)
9.2.1.1 Design Requirements
VIN > VOUT
Select RS such that:
IRMIN < IR < IRMAX where IRMAX = 15 mA
See Electrical Characteristics: 2-V LM4040-N VR Tolerance Grades 'A' And 'B'; Temperature Grade 'I'
for minimum operating current for each voltage option and grade.
9.2.1.2 Detailed Design Procedure
The resistor RS must be selected such that current IR will remain in the operational region of the part for the
entire VIN range and load current range. The two extremes to consider are VIN at its minimum, and the load at its
maximum, where RS must be small enough for IR to remain above IRMIN. The other extreme is VIN at its
maximum, and the load at its minimum, where RS must be large enough to maintain IR < IRMAX. For most
designs, 0.1 mA
≤ IR ≤ 1 mA is a good starting point.
Use Equation 2 and Equation 3 to set RS between RS_MIN and RS_MAX.
(2)
(3)
9.2.1.3 Application Curve
Figure 11. Reverse Characteristics And Minimum Operating Current


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