参数资料
| 型号： | TC1025CEPA |
| 厂商： | Microchip Technology |
| 文件页数： | 11/16页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR 1.8V DUAL 8DIP |
| 标准包装： | 60 |
| 类型： | 通用 |
| 元件数： | 2 |
| 输出类型： | 满摆幅 |
| 电压 - 电源，单路/双路(±)： | 1.8 V ~ 5.5 V |
| 电压 - 输入偏移（最小值）： | 5mV @ 3V |
| 电流 - 输入偏压（最小值）： | 100pA @ 5.5V |
| 电流 - 输出（标准）： | 2mA @ 5.5V |
| 电流 - 静态（最大值）： | 12µA |
| CMRR, PSRR（标准）： | 66dB CMRR，60dB PSRR |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 安装类型： | 通孔 |
| 包装： | 管件 |
TC1025
DS21656C-page 4
2005 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
The TC1025 is one of a series of very low-power, linear
building block products targeted at low-voltage, single-
supply applications. The TC1025 minimum operating
voltage is 1.8V, and typical supply current is only 8
μA.
It combines two comparators in a single package.
3.1
Comparators
The TC1025 contains two comparators. The compara-
tor’s input range extends beyond both supply voltages
by 200mV and the outputs will swing to within several
millivolts of the supplies depending on the load current
being driven.
The comparators exhibit propagation delay and supply
current which are largely independent of supply
voltage. The low input bias current and offset voltage
make them suitable for high impedance precision
applications.
4.0
TYPICAL APPLICATIONS
The TC1025 lends itself to a wide variety of
applications, particularly in battery-powered systems.
Typically, it finds application in power management,
processor supervisory, and interface circuitry.
4.1
External Hysteresis (Comparator)
Hysteresis can be set externally with two resistors
using positive feedback techniques (see Figure 4-1).
The design procedure for setting external comparator
hysteresis is as follows:
1.
Choose the feedback resistor RC. Since the
input bias current of the comparator is at most
100pA, the current through RC can be set to
100nA (i.e., 1000 times the input bias current)
and retain excellent accuracy. The current
through RC at the comparator’s trip point is VR/
RC where VR is a stable reference voltage.
2.
Determine the hysteresis voltage (VHY) between
the upper and lower thresholds.
3.
Calculate RA as follows:
EQUATION 4-1:
4.
Choose the rising threshold voltage for VSRC
(VTHR).
5.
Calculate RB as follows:
EQUATION 4-2:
6.
Verify
the
threshold
voltages
with
these
formulas:
VSRC rising:
EQUATION 4-3:
VSRC falling:
EQUATION 4-4:
R
A
R
C
V
HY
V
DD
-----------
=
R
B
1
V
THR
V
R
A
×
---------------------
1
R
A
-------
–
1
R
C
-------
–
-----------------------------------------------------------
=
V
THR
V
R
() R
A
()
1
R
A
-------
1
R
B
-------
1
R
C
-------
++
=
V
THF
V
THR
R
A
V
DD
×
R
C
-------------------------
–
=
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| TC1025CEUA | 功能描述:校验器 IC Dual Low-Pwr 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 |
| TC1025CEUATR | 功能描述:校验器 IC Dual Low-Pwr 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 |
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| TC1025CPA | 制造商:TELCOM 制造商全称:TelCom Semiconductor, Inc 功能描述:LINEAR BUILDING BLOCK - DUAL LOW POWER COMPARATOR |
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