参数资料
| 型号： | TC1027CEOR |
| 厂商： | Microchip Technology |
| 文件页数： | 15/18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 6
2002 Microchip Technology Inc.
Capacitor C1 will charge up through R4. When the
voltage at the comparator’s inverting input is equal to
VH, the comparator output will switch. With the output
at ground potential, the value at the non-inverting input
terminal (VL) is reduced by the hysteresis network to a
value given by:
EQUATION 4-7:
Using the same resistors as before, capacitor C1 must
now discharge through R4 toward ground. The output
will return to a high state when the voltage across the
capacitor has discharged to a value equal to VL.The
period of oscillation will be twice the time it takes for the
RC circuit to charge up to one half its final value. The
period can be calculated from:
EQUATION 4-8:
The frequency stability of this circuit should only be a
function of the external component tolerances.
Figure 4-6 shows the circuit for a pulse width modulator
circuit. It is essentially the same as in Figure 4-4, but
with the addition of an input control voltage. When the
input control voltage is equal to one-half VDD, operation
is basically the same as described for the free-running
oscillator. If the input control voltage is moved above or
below one-half VDD, the duty cycle of the output square
wave will be altered. This is because the addition of the
control voltage at the input has now altered the trip
points. The equations for these trip points are shown in
Figure 4-6 (see VH and VL).
Pulse width sensitivity to the input voltage variations
can be increased by reducing the value of R6 from
10k
and conversely, sensitivity will be reduced by
increasing the value of R6. The values of R1 and C1
can be varied to produce the desired center frequency.
FIGURE 4-1:
COMPARATOR
EXTERNAL HYSTERESIS
CONFIGURATION
FIGURE 4-2:
PRECISION BATTERY MONITOR
V
L
V
DD
3
-----------
=
1
FREQ
-----------------
2 0.694
() R4
() C1
()
=
+
–
VR
VDD
VOUT
VSRC
RA
RB
RC
1/4
TC1027
VDD
R2, 330k, 1%
TC1034
1/4
R4, 470k, 1%
R5, 7.5M
1/4
R6, 7.5M
R3, 470k, 1%
R1, 270k, 1%
VR
To System DC/DC
Converter
3V
Alkaline
TC1027
BATTFAIL
BATTLOW
CMPTR1
+
–
CMPTR2
+
–
AMP1
+
–
+
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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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