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| 型号： | MCP6442T-E/MS |
| 厂商： | Microchip Technology |
| 文件页数： | 5/46页 |
| 文件大小： | 0K |
| 描述： | IC OPAMP DUAL 1.6V 9KHZ 8MSOP |
| 标准包装： | 2,500 |
| 放大器类型： | 通用 |
| 电路数： | 2 |
| 输出类型： | 满摆幅 |
| 转换速率： | 0.003 V/µs |
| 增益带宽积： | 9kHz |
| 电流 - 输入偏压： | 1pA |
| 电压 - 输入偏移： | 4500µV |
| 电流 - 电源： | 0.45µA |
| 电流 - 输出 / 通道： | 22mA |
| 电压 - 电源，单路/双路(±)： | 1.4 V ~ 6 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-MSOP |
| 包装： | 带卷 (TR) |
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2010-2012 Microchip Technology Inc.
DS22257C-page 13
MCP6441/2/4
4.0
APPLICATION INFORMATION
The MCP6441/2/4 op amp is manufactured using
Microchip’s state-of-the-art CMOS process, specifically
designed for low power applications.
4.1
Rail-to-Rail Input
4.1.1
PHASE REVERSAL
The MCP6441/2/4 op amp is designed to prevent
phase reversal, when the input pins exceed the supply
voltages.
shows
the
input
voltage
exceeding the supply voltage with no phase reversal.
4.1.2
INPUT VOLTAGE LIMITS
In order to prevent damage and/or improper operation
of the amplifier, the circuit must limit the voltages at the
input pins (see
Ratings ).
The Electrostatic Discharge (ESD) protection on the
inputs can be depicted as shown in Figure 4-1. This
structure was chosen to protect the input transistors
against many, but not all, over-voltage conditions, and
to minimize the input bias current (IB).
FIGURE 4-1:
Simplified Analog Input ESD
Structures.
The input ESD diodes clamp the inputs when they try
to go more than one diode drop below VSS. They also
clamp any voltages that go well above VDD; their
breakdown voltage is high enough to allow normal
operation, but not low enough to protect against slow
over-voltage (beyond VDD) events. Very fast ESD
events that meet the spec are limited so that damage
does not occur.
In some applications, it may be necessary to prevent
excessive voltages from reaching the op amp inputs;
Figure 4-2 shows one approach to protecting these
inputs.
FIGURE 4-2:
Protecting the Analog
Inputs.
A significant amount of current can flow out of the
inputs when the Common Mode voltage (VCM) is below
4.1.3
INPUT CURRENT LIMITS
In order to prevent damage and/or improper operation
of the amplifier, the circuit must limit the currents into
the input pins (see
Figure 4-3 shows one approach to protecting these
inputs. The resistors R1 and R2 limit the possible
currents in or out of the input pins (and the ESD diodes,
D1 and D2). The diode currents will go through either
VDD or VSS.
FIGURE 4-3:
Protecting the Analog
Inputs.
Bond
Pad
Bond
Pad
Bond
Pad
VDD
VIN+
VSS
Input
Stage
Bond
Pad
VIN–
V1
VDD
D1
V2
D2
MCP644X
VOUT
V1
R1
VDD
D1
min(R1,R2)>
VSS –min(V1, V2)
2mA
V2
R2
D2
MCP644X
VOUT
min(R1,R2)>
max(V1,V2)–VDD
2mA
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| MCP6444-E/SL | 功能描述:运算放大器 - 运放 450 nA, 9 kHz Op Amp RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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| MCP6444-E/ST | 功能描述:运算放大器 - 运放 450 nA, 9 kHz Op Amp RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
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