參數(shù)資料
型號: MCP6407T-H/SN
廠商: Microchip Technology
文件頁數(shù): 13/44頁
文件大小: 0K
描述: IC OPAMP DUAL 1.8V 1MHZ 8SOIC
標(biāo)準(zhǔn)包裝: 3,300
放大器類型: 通用
電路數(shù): 2
輸出類型: 滿擺幅
轉(zhuǎn)換速率: 0.5 V/µs
增益帶寬積: 1MHz
電流 - 輸入偏壓: 1pA
電壓 - 輸入偏移: 4500µV
電流 - 電源: 45µA
電流 - 輸出 / 通道: 15mA
電壓 - 電源,單路/雙路(±): 1.8 V ~ 6 V
工作溫度: -40°C ~ 150°C
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 8-SOICN
包裝: 帶卷 (TR)
MCP6401/1R/1U/2/4/6/7/9
DS22229D-page 20
2009-2011 Microchip Technology Inc.
4.7.2
BATTERY CURRENT SENSING
The MCP6401/1R/1U/2/4/6/7/9 op amps’ Common
Mode Input Range, which goes 0.3V beyond both
supply rails, supports their use in high-side and low-
side battery current sensing applications. The low
quiescent current (45 A, typical) helps prolong battery
life, and the rail-to-rail output supports detection of low
currents.
Figure 4-9 shows a high-side battery current sensor
circuit. The 10
Ω resistor is sized to minimize power
losses. The battery current (IDD) through the 10Ω
resistor causes its top terminal to be more negative
than the bottom terminal. This keeps the Common
Mode input voltage of the op amp below VDD, which is
within its allowed range. The output of the op amp will
also be below VDD, which is within its Maximum Output
Voltage Swing specification.
FIGURE 4-9:
Supply Current Sensing.
4.7.3
INSTRUMENTATION AMPLIFIER
The MCP6401/1R/1U/2/4/6/7/9 op amps are well
suited for conditioning sensor signals in battery-
powered applications. Figure 4-10 shows a two op amp
instrumentation amplifier, using the MCP6402, that
works well for applications requiring rejection of
Common Mode noise at higher gains. The reference
voltage (VREF) is supplied by a low impedance source.
In single supply applications, VREF is typically VDD/2.
FIGURE 4-10:
Two Op Amp
Instrumentation Amplifier.
VDD
IDD
100 k
Ω
1M
Ω
1.8V
VOUT
10
Ω
to
6.0V
I
DD
V
DD
V
OUT
10 V/V
() 10
Ω
()
------------------------------------------
=
To load
MCP6401
V
OUT
V
1
V
2
() 1
R
1
R
2
------
2R
1
R
G
---------
++
V
REF
+
=
VREF R1
R2
R1
VOUT
RG
V2
V1
MCP6402
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