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LOG114 Datasheet(PDF) 27 Page - Texas Instruments

Part # LOG114
Description  LOG114 Single-Supply, High-Speed, Precision Logarithmic Amplifier
PDF  43 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

LOG114 Datasheet(HTML) 27 Page - Texas Instruments

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7.4.2 Layout Example
A
1
+
–
A
3
+
–
A
2
+
–
I2
I1
V
CM IN
COM
A
4
+
–
V
O4
–IN
4
+IN
4
V+
V
REF GND
I
2
I
1
LOG114
V
LOGOUT
REF
V
REF
A
5
–
+
V
O5
+IN
5
–IN
5
R
2
R
3
V–
R
1
R
4
R
5
I
REF
1 F
C
1
5V
C
2
–5V
Photodiode
Figure 7-15. LOG114 Example Circuit
V
REF GND
NC
I
2
4
I
1
1
2
3
V
O4
–IN
4
+IN
4
9
V
LOGOUT
12
11
10
PAD
GND
C
2
V
REF
Place bypass
capacitors as close to
device as possible
Consider using
thermal vias for
heatsinking
V
LOGOUT
V–
C
1
V+
R
2
R
3
Cutouts on ground planes
underneath the device
can reduce stray
capacitance and leakage
GND
Photodiode
R
5
GND
R
4
V
O4
R
1
V
REF
GND
GND
V
REF
Figure 7-16. LOG114 Layout Example
www.ti.com
LOG114
SBOS301B – MAY 2004 – REVISED MARCH 2025
Copyright © 2025 Texas Instruments Incorporated
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Product Folder Links: LOG114



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