参数资料
| 型号： | TC1027CEOR |
| 厂商： | Microchip Technology |
| 文件页数： | 13/18页 |
| 文件大小： | 0K |
| 描述： | IC COMPARATOR 1.8V QUAD 16SOIC |
| 标准包装： | 50 |
| 类型： | 带电压基准 |
| 元件数： | 4 |
| 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）： | 26µA |
| CMRR, PSRR（标准）： | 66dB CMRR，60dB PSRR |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 安装类型： | 表面贴装 |
| 包装： | 管件 |
TC1027
DS21284B-page 4
2002 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
The TC1027 is one of a series of very low-power, linear
building block products targeted at low-voltage, single-
supply applications. The TC1027 minimum operating
voltage is 1.8V, and typical supply current is only 18
A.
It combines four comparators and a voltage reference
inasinglepackage.
3.1
Comparators
The TC1027 contains four 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.
3.2
Voltage Reference
A 2.0% tolerance, internally biased, 1.20V bandgap
voltage reference is included in the TC1027. It has a
push pull output capable of sourcing and sinking at
least 50
A.
GND (Pin 9) is connected to VSS (Pin 14) through the
substrate of the integrated circuit. Large currents can
flow between GND and VSS if the pins are not at the
same voltage.
4.0
TYPICAL APPLICATIONS
The TC1027 lends itself to a wide variety of
applications, particularly in battery-powered systems. It
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 canbeset 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
TH R
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC1027CEORTR | 功能描述:校验器 IC Quad Low-Pwr & VR 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 |
| TC1027CEPE | 功能描述:校验器 IC Quad Low-Pwr & VR 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 |
| TC1027CEPR | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Linear Building Block - Quad Low Power Comparator and Voltage Reference |
| TC1027CEQR | 功能描述:校验器 IC Quad Low-Pwr & VR 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 |
| TC1027CEQRTR | 功能描述:校验器 IC Quad Low-Pwr & VR 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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