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| 型号： | MIC842LBC5 TR |
| 厂商： | Micrel Inc |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR W/REFERENCE SC70-5 |
| 标准包装： | 3,000 |
| 系列： | Teeny™ |
| 类型： | 带电压基准 |
| 元件数： | 1 |
| 输出类型： | 推挽式 |
| 电压 - 电源，单路/双路(±)： | 1.5 V ~ 5.5 V |
| 电流 - 输出（标准）： | 20mA |
| 电流 - 静态（最大值）： | 3µA |
| 传输延迟（最大）： | 12µs |
| 磁滞： | 35mV |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 6-TSSOP（5 引线），SC-88A，SOT-353 |
| 安装类型： | 表面贴装 |
| 包装： | 带卷 (TR) |
| 其它名称： | MIC842LBC5TR MIC842LBC5TR-ND |
Micrel, Inc.
MIC841/842
October 29, 2013
6
Revision 4.1
Application Information
Output
The MIC841N and MIC842N outputs are an open-drain
MOSFET, so most applications will require a pull-up
resistor. The value of the resistor should not be too large
or leakage effects may dominate. 470kΩ is the maximum
recommended value. Note that the output of “N” version
may be pulled up as high as 6V regardless of the ICs
supply voltage. The “H” and “L” versions of the MIC841
and MIC842 have a push-pull output stage, with a diode
clamped to VDD. Thus, the maximum output voltage of
the
“H”
and
“L”
versions
is
When working with large resistors on the input to the
devices, a small amount of leakage current can cause
voltage offsets that degrade system accuracy. The
maximum recommended total resistance from VIN to
ground is 3MΩ. The accuracy of the resistors can be
chosen based upon the accuracy required by the system.
The inputs may be subjected to voltages as high as 6V
steady-state
without
adverse
effects
of
any
kind
regardless of the ICs supply voltage. This applies even if
the supply voltage is zero. This permits the situation in
which the IC’s supply is turned off, but voltage is still
present on the inputs (see Electrical Characteristics).
Programming the MIC841 Thresholds
The low-voltage threshold is calculated using Equation 1:
VIN(LO) = VREF
+
3
R
2
R
3
R
2
R
1
R
Eq. 1
The high-voltage threshold is calculated using Equation
2:
VIN(HI) = VREF
+
3
R
3
R
2
R
1
R
Eq. 2
Where, for both equations:
VREF = 1.240V
In order to provide the additional criteria needed to solve
for the resistor values, the resistors can be selected such
that they have a given total value, that is, R1 + R2 + R3 =
RTOTAL. A value such as 1M for RTOTAL is a reasonable
value because it draws minimum current but has no
significant effect on accuracy.
Figure 1. MIC841 Example Circuit
Once the desired trip points are determined, set the VIN(HI)
threshold first.
For example, use a total of 1M
= R1 + R2 + R3. For a
typical single-cell lithium ion battery, 3.6V is a good “high
threshold” because at 3.6V the battery is moderately
charged. Solving for R3:
VIN(HI) = 3.6V = 1.24V
3
R
M
1
Eq. 3
Where:
R3 = 344k
Once R3 is determined, the equation for VIN(LO) can be
used to determine R2. A single lithium-ion cell, for
example, should not be discharged below 2.5V. Many
applications limit the drain to 3.1V.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC842LYC5 | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC842LYC5 TR | 功能描述:校验器 IC 1.5 A Undervoltage Comparator with 1.25% 1.24V Reference, 20mV Hysteresis, Active-High Push-Pull Output in SC70-5 (Lead Free) RoHS:否 制造商:STMicroelectronics 产品: 比较器类型: 通道数量: 输出类型:Push-Pull 电源电压-最大:5.5 V 电源电压-最小:1.1 V 补偿电压（最大值）:6 mV 电源电流（最大值）:1350 nA 响应时间: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SC-70-5 封装:Reel |
| MIC842LYC5TR | 制造商:Rochester Electronics LLC 功能描述: 制造商:RF Micro Devices Inc 功能描述: |
| MIC842LYC5-TR | 功能描述:Comparator with Voltage Reference Push-Pull SC-70-5 制造商:microchip technology 系列:Teeny?? 包装:剪切带（CT） 零件状态:有效 类型:带电压基准 元件数:1 输出类型:推挽式 电压 - 电源，单/双（±）:1.5 V ~ 5.5 V 电压 - 输入失调（最大值）:- 电流 - 输入偏置（最大值）:- 电流 - 输出（典型值）:20mA 电流 - 静态（最大值）:3μA CMRR，PSRR（典型值）:- 传播延迟（最大值）:50μs 滞后:20mV 工作温度:-40°C ~ 85°C 封装/外壳:5-TSSOP，SC-70-5，SOT-353 安装类型:表面贴装 供应商器件封装:SC-70-5 标准包装:1 |
| MIC842LYMT-T5 | 功能描述:Comparator with Voltage Reference Push-Pull 4-TDFN (1.2x1.6) 制造商:microchip technology 系列:Teeny?? 包装:剪切带（CT） 零件状态:停产 类型:带电压基准 元件数:1 输出类型:推挽式 电压 - 电源，单/双（±）:1.5 V ~ 5.5 V 电压 - 输入失调（最大值）:- 电流 - 输入偏置（最大值）:- 电流 - 输出（典型值）:20mA 电流 - 静态（最大值）:3μA CMRR，PSRR（典型值）:- 传播延迟（最大值）:50μs 滞后:20mV 工作温度:-40°C ~ 85°C 封装/外壳:4-UFDFN 裸露焊盘 安装类型:表面贴装 供应商器件封装:4-TDFN（1.2x1.6） 标准包装:1 |
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