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MCP6V92 bảng dữ liệu(PDF) 24 Page - Microchip Technology

tên linh kiện MCP6V92
Giải thích chi tiết về linh kiện  Temperature Measurement
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nhà sản xuất  MICROCHIP [Microchip Technology]
Trang chủ  http://www.microchip.com
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MCP6V92 bảng dữ liệu(HTML) 24 Page - Microchip Technology

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MCP6V91/1U/2/4
DS20005434B-page 24
 2015-2016 Microchip Technology Inc.
4.4.3
OFFSET VOLTAGE CORRECTION
Figure 4-13 shows MCP6V91 (U2) correcting the input
offset voltage of another op amp (U1). R2 and C2
integrate the offset error seen at U1’s input. The
integration needs to be slow enough to be stable (with
the feedback provided by R1 and R3). R4 and R5
attenuate the integrator’s output. This shifts the
integrator pole down in frequency.
FIGURE 4-13:
Offset Correction.
4.4.4
PRECISION COMPARATOR
Use high gain before a comparator to improve the
latter’s performance. Do not use MCP6V91/1U/2/4 as
a comparator by itself; the VOS correction circuitry does
not operate properly without a feedback loop.
FIGURE 4-14:
Precision Comparator.
U1
MCP6XXX
C2
R2
R1
R3
VDD/2
R4
VIN
VOUT
R2
VDD/2
R5
U2
MCP6V91
+
-
+
-
VIN
R3
R2
VDD/2
VOUT
R5
R4
R1
U1
MCP6V91
U2
MCP6541
+
-
+
-



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