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| 型号： | TC7135CBU713 |
| 厂商： | Microchip Technology |
| 文件页数： | 8/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 4 1/2DGT 64-MQFP |
| 标准包装： | 250 |
| 显示器类型： | LED |
| 配置： | 7 段显示 |
| 接口： | BCD |
| 数字或字符： | A/D，4.5 位数字 |
| 电流 - 电源： | 1mA |
| 电源电压： | 4 V ~ 6 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 64-BQFP |
| 供应商设备封装： | 64-PQFP（14x14） |
| 包装： | 带卷 (TR) |
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TC7135
4.0
ANALOG SECTION
4.3
Reference Voltage Input
FUNCTIONAL DESCRIPTION
The reference voltage input (REF IN) must be a
positive voltage with respect to ANALOG COMMON. A
4.1
Differential Inputs
The TC7135 operates with differential voltages
(+INPUT, pin 10 and -INPUT, pin 9) within the input
amplifier Common mode range, which extends from 1V
V+
below the positive supply to 1V above the negative
supply. Within this Common mode voltage range, an
86 dB Common mode rejection ratio is typical.
The integrator output also follows the Common mode
voltage and must not be allowed to saturate. A worst-
V+
TC7135
REF
IN
10 k Ω
10 k Ω
MCP1525
2.5 V REF
1 μF
case condition exists, for example, when a large
positive Common mode voltage with a near full scale
negative differential input voltage is applied. The
negative input signal drives the integrator positive when
most of its swing has been used up by the positive
ANALOG
COMMON
Analog Ground
Common mode voltage. For these critical applications,
the integrator swing can be reduced to less than the
recommended 4V full scale swing, resulting in some
loss of accuracy. The integrator output can swing within
0.3V of either supply without loss of linearity.
4.2
Analog Common Input
The ANALOG COMMON pin is used as the -INPUT
return during auto-zero and de-integrate. If -INPUT is
different from ANALOG COMMON, a Common mode
voltage exists in the system. However, this signal is
rejected by the excellent CMRR of the converter. In
most applications, –INPUT will be set at a fixed, known
voltage (power supply common, for instance). In this
application, ANALOG COMMON should be tied to the
same point, thus removing the Common mode voltage
from the converter. The reference voltage is referenced
to ANALOG COMMON.
DS21460D-page 8
FIGURE 4-1:
Reference.
Using An External
? 2007 Microchip Technology Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7135CKW | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit A/D Converter |
| TC7135CLI | 功能描述:LED显示驱动器 4-1/2 Digit A/D BCD RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7135CLI713 | 功能描述:LED显示驱动器 4-1/2 Digit A/D BCD RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7135CPI | 功能描述:LED显示驱动器 4-1/2 Digit A/D BCD RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7135CPL | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit A/D Converter |
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