Figure 4-13 shows MCP6V11 (U
參數(shù)資料
型號: MCP6V11T-E/OT
廠商: Microchip Technology
文件頁數(shù): 18/40頁
文件大?。?/td> 0K
描述: IC OPAMP SGL ZERO DRIFT SOT23-5
標(biāo)準(zhǔn)包裝: 1
放大器類型: 零漂移
電路數(shù): 1
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 0.03 V/µs
增益帶寬積: 80kHz
電流 - 輸入偏壓: 5pA
電壓 - 輸入偏移: 8µV
電流 - 電源: 7.5µA
電流 - 輸出 / 通道: 17mA
電壓 - 電源,單路/雙路(±): 1.6 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
安裝類型: 表面貼裝
封裝/外殼: SC-74A,SOT-753
供應(yīng)商設(shè)備封裝: SOT-23-5
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: MCP6V11T-E/OTDKR
2012 Microchip Technology Inc.
DS25124A-page 25
MCP6V11/1U
4.4.3
OFFSET VOLTAGE CORRECTION
Figure 4-13 shows MCP6V11 (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 MCP6V11/1U 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
MCP6V11
VIN
R3
R2
VDD/2
VOUT
R5
R4
R1
U1
MCP6V11
U2
MCP6541
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