参数资料
| 型号： | TC835CBU |
| 厂商： | Microchip Technology |
| 文件页数： | 8/26页 |
| 文件大小： | 0K |
| 描述： | IC ADC 4 1/2DGT BCD 64-MQFP |
| 标准包装： | 84 |
| 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： | 管件 |
TC835
4.0
ANALOG SECTION
4.3
Reference Voltage Input
FUNCTIONAL DESCRIPTION
The REF IN input must be a positive voltage with
respect to ANALOG COMMON. A reference voltage
4.1
Differential Inputs
The TC835 operates with differential voltages within
the input amplifier Common mode range. The input
amplifier Common mode range extends from 0.5V
V+
below the positive supply to 1V above the negative
supply. Within this Common mode voltage range, an
86dB Common mode rejection ratio is typical.
The integrator output also follows the Common mode
voltage. The integrator output must not be allowed to
V+
TC835
REF
IN
10 k Ω
10 k Ω
MCP1525
2.5 V REF
1 μF
saturate. An example of a worst case condition would
be 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
ANALOG
COMMON
Analog Ground
the positive Common mode voltage. For these critical
applications, the integrator swing can be reduced to
less than the recommended 4V full scale swing, with
the effect of reduced accuracy. The integrator output
can swing within 0.3V of either supply without loss of
linearity.
4.2
Analog Common Input
ANALOG COMMON is used as the -INPUT return dur-
ing auto zero and de-integrate. If -INPUT is different
from ANALOG COMMON, a Common mode voltage
exists in the system. 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.
DS21478C-page 8
FIGURE 4-1:
Reference.
Using An External
? 2007 Microchip Technology Inc.
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| TC835CBU713 | 功能描述:LED显示驱动器 4.5 D BCD A/D-PC Dat 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 |
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