- 您现在的位置：买卖IC网 > PDF目录20203 > TC7106CKW (Microchip Technology)IC ADC 3 1/2DGT LCD DVR 44-MQFP PDF资料下载
参数资料
| 型号： | TC7106CKW |
| 厂商： | Microchip Technology |
| 文件页数： | 8/34页 |
| 文件大小： | 0K |
| 描述： | IC ADC 3 1/2DGT LCD DVR 44-MQFP |
| 标准包装： | 96 |
| 显示器类型： | LCD |
| 配置： | 7 段显示 |
| 数字或字符： | A/D，3.5 位数字 |
| 电流 - 电源： | 800µA |
| 电源电压： | 9V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-QFP |
| 供应商设备封装： | 44-MQFP（10x10） |
| 包装： | 托盘 |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页
TC7106/A/TC7107/A
3.0
DETAILED DESCRIPTION
For a constant V IN :
( All Pin designations refer to 40-Pin PDIP. )
EQUATION 3-2:
3.1 Dual Slope Conversion Principles
The TC7106A and TC7107A are dual slope, integrating
V IN = V R
T RI
T SI
Analog-to-Digital Converters. An understanding of the
dual slope conversion technique will aid in following the
detailed operation theory.
The conventional dual slope converter measurement
cycle has two distinct phases:
? Input Signal Integration
? Reference Voltage Integration (De-integration)
The input signal being converted is integrated for a
fixed time period (T SI ). Time is measured by counting
clock pulses. An opposite polarity constant reference
voltage is then integrated until the integrator output
voltage returns to zero. The reference integration time
The dual slope converter accuracy is unrelated to the
integrating resistor and capacitor values as long as
they are stable during a measurement cycle. An
inherent benefit is noise immunity. Noise spikes are
integrated or averaged to zero during the integration
periods. Integrating ADCs are immune to the large
conversion errors that plague successive
approximation converters in high noise environments.
Interfering signals with frequency components at
multiples of the averaging period will be attenuated.
Integrating ADCs commonly operate with the signal
integration period set to a multiple of the 50/60Hz
power line period (see Figure 3-2 ).
is directly proportional to the input signal (T RI ). See
30
Analog
C
Input
Signal
Integrator
–
+
Comparator
–
+
20
+/–
REF
Voltage
Switch
Driver
Phase
Control
Polarity Control
Control
Logic
10
0
T = Measured Period
DISPLAY
Counter
0.1/T
1/T
Input Frequency
10/T
V IN μ V REF
V IN μ 1/2 V REF
FIGURE 3-2:
Normal Mode Rejection of
( 4000 ) ? ------------- ? ? ----------- ?
? F OSC ? ? R INT ?
C INT
Fixed Variable
Signal Reference
Integrate Integrate
Time Time
FIGURE 3-1: Basic Dual Slope Converter.
In a simple dual slope converter, a complete
Dual Slope Converter.
1 V FS
= ------------------------------------------------------
V INT
Where:
-------- ∫
V IN ( t ) dt = ---------------
conversion requires the integrator output to “ramp-up”
and “ramp-down.” A simple mathematical equation
relates the input signal, reference voltage and
integration time.
EQUATION 3-1:
1 T SI
V R T RI
RC 0
RC
F OSC
V FS
R INT
V INT
=
=
=
=
Clock Frequency at Pin 38
Full Scale Input Voltage
Integrating Resistor
Desired Full Scale Integrator Output
Swing
Where:
V R
T SI
T RI
=
=
=
Reference voltage
Signal integration time (fixed)
Reference voltage integration time
(variable).
DS21455D-page 8
? 2008 Microchip Technology Inc.
相关PDF资料 |
PDF描述 |
|---|---|
| NCV612SQ30T2G | IC REG LDO 3V .2A SC70-5 |
| TC7106CLW | IC ADC 3 1/2DGT LCD DVR 44-PLCC |
| ABC36DREF-S734 | CONN EDGECARD 72POS .100 EYELET |
| TC7107CKW713 | IC ADC 3 1/2DGT LED DVR 44-MQFP |
| TC7107CLW | IC ADC 3 1/2DGT LED DVR 44-PLCC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7106CKW713 | 功能描述:LCD 驱动器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| TC7106CLW | 功能描述:LCD 驱动器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| TC7106CLW713 | 功能描述:LCD 驱动器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| TC7106CPL | 功能描述:LCD 驱动器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 数位数量:4.5 片段数量:30 最大时钟频率:19 KHz 工作电源电压:3 V to 3.6 V 最大工作温度:+ 85 C 最小工作温度:- 20 C 封装 / 箱体:PDIP-40 封装:Tube |
| TC7106CPL | 制造商:Microchip Technology Inc 功能描述:ADC 3-1/2 DIGIT LCD DRIVER 40DIP 制造商:Microchip Technology Inc 功能描述:ADC, 3-1/2 DIGIT, LCD DRIVER, 40DIP 制造商:Microchip Technology Inc 功能描述:ADC, 3-1/2 DIGIT, LCD DRIVER, 40DIP; Resolution (Bits):3.5bit; Supply Current:800A; Digital IC Case Style:DIP; No. of Pins:40; Input Channel Type:Differential; Data Interface:Parallel; Operating Temperature Min:0C; Operating ;RoHS Compliant: Yes |
发布紧急采购，3分钟左右您将得到回复。