參數(shù)資料
型號： TC7106CLW
元件分類： ADC
英文描述： 1-CH DUAL-SLOPE ADC, PQCC44
封裝： PLASTIC, LCC-44
文件頁數(shù)： 25/26頁
文件大?。?/td> 623K
代理商： TC7106CLW
TC7106/A/TC7107/A
DS21455B-page 8
2002 Microchip Technology Inc.
3.0
DETAILED DESCRIPTION
(All Pin designations refer to 40-Pin PDIP.)
3.1
Dual Slope Conversion Principles
The TC7106A and TC7107A are dual slope, integrating
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 (TSI). 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
is directly proportional to the input signal (TRI). See
Figure 3-1.
FIGURE 3-1:
BASIC DUAL SLOPE
CONVERTER
In a simple dual slope converter, a complete conver-
sion 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:
For a constant VIN:
EQUATION 3-2:
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 inher-
ent benefit is noise immunity. Noise spikes are inte-
grated or averaged to zero during the integration
periods. Integrating ADCs are immune to the large con-
version errors that plague successive approximation
converters in high noise environments. Interfering sig-
nals 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).
FIGURE 3-2:
NORMAL MODE
REJECTION OF DUAL
SLOPE CONVERTER
+
–
REF
Voltage
Analog
Input
Signal
+
–
DISPLAY
Switch
Driver
Control
Logic
Integrator
Output
Clock
Counter
Polarity Control
Phase
Control
VIN ≈ VREF
VIN ≈ 1/2 VREF
Variable
Reference
Integrate
Time
Fixed
Signal
Integrate
Time
Integrator
C
Comparator
+/–
1
RC
VRTRI
RC
TSI
0
VIN(t)dt =
∫
Where:
VR = Reference voltage
TSI = Signal integration time (fixed)
TRI = Reference voltage integration time (variable).
VIN =VR
TRI
TSI
30
20
10
0
Normal
Mode
Rejection
(dB)
0.1/T
1/T
10/T
Input Frequency
T = Measured Period
相關(guān)PDF資料
PDF描述
TC7107AIJL 1-CH DUAL-SLOPE ADC, CDIP40
TC7106IJL 1-CH DUAL-SLOPE ADC, CDIP40
TC7107ACLW 1-CH DUAL-SLOPE ADC, PQCC44
TC7106CKW 1-CH DUAL-SLOPE ADC, PQFP44
TC7107CKWG 1-CH DUAL-SLOPE ADC, PQFP44
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TC7106CLW713 功能描述:LCD 驅(qū)動器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TC7106CPL 功能描述:LCD 驅(qū)動器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝: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
TC7106IJL 功能描述:LCD 驅(qū)動器 3-1/2 Digit A/D w/ LCD Driver RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
TC7106IKW 功能描述:LCD 驅(qū)動器 w/LCD Driver RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*