参数资料
型号: MCP6H04T-E/ST
厂商: Microchip Technology
文件页数: 11/46页
文件大小: 0K
描述: IC OPAMP QUAD16V 1.2MHZ 14TSSOP
标准包装: 2,500
放大器类型: 通用
电路数: 4
输出类型: 满摆幅
转换速率: 0.8 V/µs
增益带宽积: 1.2MHz
电流 - 输入偏压: 10pA
电压 - 输入偏移: 700µV
电流 - 电源: 135µA
电流 - 输出 / 通道: 50mA
电压 - 电源,单路/双路(±): 3.5 V ~ 16 V,±1.75 V ~ 8 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 14-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 14-TSSOP
包装: 带卷 (TR)
2010-2011 Microchip Technology Inc.
DS22243D-page 19
MCP6H01/2/4
4.6
PCB Surface Leakage
In applications where low input bias current is critical,
PCB surface leakage effects need to be considered.
Surface leakage is caused by humidity, dust or other
contamination on the board. Under low-humidity condi-
tions, a typical resistance between nearby traces is
1012
. A 15V difference would cause 15 pA of current
to flow; which is greater than the MCP6H01/2/4 family’s
bias current at +25°C (10 pA, typical).
The easiest way to reduce surface leakage is to use a
guard ring around sensitive pins (or traces). The guard
ring is biased at the same voltage as the sensitive pin.
An example of this type of layout is shown in
FIGURE 4-7:
Example Guard Ring Layout
for Inverting Gain.
1.
Non-inverting Gain and Unity-Gain Buffer:
a.
Connect the non-inverting pin (VIN+) to the
input with a wire that does not touch the
PCB surface.
b.
Connect the guard ring to the inverting input
pin (VIN–). This biases the guard ring to the
common mode input voltage.
2.
Inverting Gain and Trans-impedance Gain
Amplifiers (convert current to voltage, such as
photo detectors):
a.
Connect the guard ring to the non-inverting
input pin (VIN+). This biases the guard ring
to the same reference voltage as the op
amp (e.g., VDD/2 or ground).
b.
Connect the inverting pin (VIN–) to the input
with a wire that does not touch the PCB
surface.
4.7
Application Circuits
4.7.1
DIFFERENCE AMPLIFIER
The MCP6H01/2/4 op amps can be used in current
sensing applications. Figure 4-8 shows a resistor
(RSEN) that converts the sensor current (ISEN) to
voltage, as well as a difference amplifier that amplifies
the voltage across the resistor while rejecting common
mode noise. R1 and R2 must be well matched to obtain
an
acceptable
Common
Mode
Rejection
Ratio
(CMRR). Moreover, RSEN should be much smaller than
R1 and R2 in order to minimize the resistive loading of
the source.
To ensure proper operation, the op amp common mode
input voltage must be kept within the allowed range.
The reference voltage (VREF) is supplied by a
low-impedance source. In single-supply applications,
VREF is typically VDD/2.
.
FIGURE 4-8:
High Side Current Sensing
Using Difference Amplifier.
Guard Ring
VIN–VIN+
VSS
R1
VOUT
R2
R1
RSEN
ISEN
RSEN << R1, R2
V
OUT
V
1
V
2
R
2
R
1
------
V
REF
+
=
VREF
R2
VDD
MCP6H01
相关PDF资料
PDF描述
CSR1206FK75L0 RES .075 OHM 1/2W 1% 1206 SMD
2550-6002UG CONN HEADER 50POS STR GOLD T/
MCP6293-E/SN IC OPAMP 2.4V SNGL CS R-R 8SOIC
N2516-7003-UB CONN HEADER 16POS STR GOLD T/H
N2516-5003-UB CONN HEADER 16POS R/A GOLD T/H
相关代理商/技术参数
参数描述
MCP6H71-E/SN 功能描述:运算放大器 - 运放 16bit deltasigma ADC dual channel 15sps 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
MCP6H71-E/SN 制造商:Microchip Technology Inc 功能描述:Single 12V 2MHz Opamp 8 SOIC 制造商:Microchip Technology Inc 功能描述:Single, 12V, 2MHz Opamp 8 SOIC 3.90mm(.1
MCP6H71T-E/MNY 制造商:Microchip Technology Inc 功能描述:SINGLE, 12V, 2MHZ OPAMP - Tape and Reel 制造商:Microchip Technology Inc 功能描述:IC OPAMP GP 2.7MHZ RRO 8TDFN
MCP6H71T-E/SN 制造商:Microchip Technology Inc 功能描述:SINGLE, 12V, 2MHZ OPAMP - Tape and Reel 制造商:Microchip Technology Inc 功能描述:IC OPAMP GP 2.7MHZ RRO 8SOIC
MCP6H72-E/SN 功能描述:运算放大器 - 运放 Single 5MHz OP E tmp 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