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LOG114AIRGVT датащи(PDF) 16 Page - Texas Instruments

номер детали LOG114AIRGVT
подробное описание детали  LOG114 Single-Supply, High-Speed, Precision Logarithmic Amplifier
PDF  43 Pages
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производитель  TI2 [Texas Instruments]
домашняя страница  https://www.ti.com
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LOG114AIRGVT датащи(HTML) 16 Page - Texas Instruments

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R
REF
15V
3.6k
I
REF
–15V
6V
I
REF = 6V / RREF
Figure 7-3. Temperature-Compensated Current Source
7.1.4 Negative Input Currents
The LOG114 functions only with positive input currents (conventional current flows into input current pins). In
situations where negative input currents are needed, the example circuits in Figure 7-4, Figure 7-5, and Figure
7-6 can be referenced.
TLV9101
–
+
D
2
D
1
I
REF
I
OUT
Figure 7-4. Current Inverter/Current Source
1k
3.3V
10nA to 1mA
1.5k
LOG114
10nA to 1mA
Pin 3 or Pin 4
OPA2383
–
+
OPA2383
–
+
Figure 7-5. Precision Current Inverter/Current Source
100k
100k
100k
100k
1k
3.3V
10nA to 1mA
1.5k
3.3V
1.5k
LOG114
10nA to 1mA
Pin 3 or Pin 4
OPA2383
–
+
OPA2383
–
+
Figure 7-6. Precision Current Inverter/Current Source
7.1.5 Voltage Inputs
The LOG114 was optimized for current inputs. Voltage inputs may be handled directly by using a low-impedance
voltage source with series resistors, but the dynamic input range is limited to approximately three decades
LOG114
SBOS301B – MAY 2004 – REVISED MARCH 2025
www.ti.com
16
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Product Folder Links: LOG114



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