- 您現(xiàn)在的位置：買賣IC網 > PDF目錄98178 > TC7129CLWTR 1-CH 4-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PQCC44 PDF資料下載
參數(shù)資料
| 型號： | TC7129CLWTR |
| 元件分類： | ADC |
| 英文描述： | 1-CH 4-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PQCC44 |
| 封裝： | PLASTIC, MO-047, LCC-44 |
| 文件頁數(shù)： | 27/28頁 |
| 文件大?。?/td> | 544K |
| 代理商： | TC7129CLWTR |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當前第27頁第28頁
TC7129
DS21459D-page 8
2006 Microchip Technology Inc.
Figure 3-1:
Standard Circuit.
3.3
Integrating Capacitor (CINT)
The charge stored in the integrating capacitor during
the integrate phase is directly proportional to the input
voltage. The primary selection criterion for CINT is to
choose a value that gives the highest voltage swing
while remaining within the high-linearity portion of the
integrator output range. An integrator swing of 2V is the
recommended value. The capacitor value can be
calculated using the following equation:
EQUATION 3-1:
Using the values derived above (assuming 60 Hz
operation), the equation becomes:
EQUATION 3-2:
The capacitor should have low dielectric absorption to
ensure good integration linearity. Polypropylene and
Teflon capacitors are usually suitable. A good
measurement of the dielectric absorption is to connect
the
reference
capacitor
across
the
inputs
by
connecting:
Pin-to-Pin:
20
→ 33 (CREF+ to IN HI)
30
→ 32 (CREF– to IN LO)
A reading between 10,000 and 9998 is acceptable;
anything lower indicates unacceptably high dielectric
absorption.
3.4
Reference Capacitor (CREF)
The reference capacitor stores the reference voltage
during several phases of the measurement cycle. Low
leakage is the primary selection criterion for this com-
ponent. The value must be high enough to offset the
effect of stray capacitance at the capacitor terminals. A
value of at least 1
μF is recommended.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
9V
+
Low Battery
Continuity
V+
5 pF
120
kHz
10 pF
0.1 F
20
k
Ω
0.1
F
100 k
Ω
CINT
0.1 F
V+
VIN
–
+
330 k
Ω
Crystal
RO
CO2
CRF
DREF
RREF
CIF
RIF
CREF+
1 F
10 k
Ω
RBIAS
150 k
Ω
RINT
OSC1
OSC3
ANNUNC
V
DISP
DP
4
/OR
Display Drive Outputs
DP
3
/UR
LATCH/
HOLD
V–
V+
INT
IN
INT
OUT
CONTINUITY
COMMON
C
REF
+
C
REF
–
BUFF
IN
LO
IN
HI
REF
HI
REF
LO
DGND
RANGE
DP
2
DP
1
OSC2
TC7129
CO1
CINT =
tINT x IINT
VSWING
Where tINT is the integration time.
CINT =
= 0.1
μA
16.7 msec x 13.3
μA
2V
相關PDF資料 |
PDF描述 |
|---|---|
| TC7129CJL | 1-CH DUAL-SLOPE ADC, CDIP40 |
| TC7129IKW | 1-CH DUAL-SLOPE ADC, PQFP44 |
| TC7129ILW | 1-CH DUAL-SLOPE ADC, PQCC44 |
| TC7129IPL | 1-CH DUAL-SLOPE ADC, PDIP40 |
| TC7129CPL | 1-CH 4-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PDIP40 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TC7129CPL | 功能描述:LCD 驅動器 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 |
| TC7129CPL713 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129IJL713 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129IKW713 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129ILW713 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
發(fā)布緊急采購，3分鐘左右您將得到回復。