- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄361408 > TC7117CPL (Microchip Technology Inc.) 3-1/2 Digit Analog-to-Digital Converters with Hold PDF資料下載
參數(shù)資料
| 型號： | TC7117CPL |
| 廠商： | Microchip Technology Inc. |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | 3-1/2 Digit Analog-to-Digital Converters with Hold |
| 中文描述： | 3-1/2數(shù)字模擬數(shù)字轉(zhuǎn)換器與保持 |
| 文件頁數(shù)： | 8/14頁 |
| 文件大?。?/td> | 218K |
| 代理商： | TC7117CPL |
3-210
TELCOM SEMICONDUCTOR, INC.
TC7116
TC7116A
BP
TEST
37
21
V+
V+
GND
TO LCD
DECIMAL
POINT
TO LCD
BACK-
PLANE
4049
V+
REF
V+
1.2V
REF
COMMON
TC7116
TC7116A
TC7117
TC7117A
V+
6.8 k
TC9491CZM
20 k
Figure 4. Using an External Reference
recommended 2V full-scale swing with little loss of accu-
racy. The integrator output can swing within 0.3V of either
supply without loss of linearity.
Analog Common
This pin is included primarily to set the common-mode
voltage for battery operation (TC7116/TC7116A) or for any
system where the input signals are floating with respect to
the power supply. The analog common pin sets a voltage
approximately 2.8V more negative than the positive supply.
This is selected to give a minimum end-of-life battery voltage
of about 6V. However, analog common has some attributes
of a reference voltage. When the total supply voltage is large
enough to cause the zener to regulate (>7V), the analog
common voltage will have a low voltage coefficient (0.001%/
%), low output impedance (
15
), and a temperature coef-
ficient of less than 20 ppm/
°
C, typically, and 50 ppm maxi-
mum. The TC7116/TC7117 temperature coefficients are
typically 80 ppm/
°
C.
An external reference may be used, if necessary, as
shown in Figure 4.
Analog common is also used as V
–
zero and deintegrate. If V
–
a common-mode voltage exists in the system and is taken
care of by the excellent CMRR of the converter. However, in
some applications, V
–
(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 same holds true for the reference voltage; if it can be
conveniently referenced to analog common, it should be.
This removes the common-mode voltage from the reference
system.
Within the IC, analog common is tied to an N-channel
FET that can sink 30 mA or more of current to hold the
voltage 3V below the positive supply (when a load is trying
IN
return during auto-
IN
is different from analog common,
IN
will be set at a fixed, known voltage
to pull the analog common line positive). However, there is
only 10
μ
A of source current, so analog common may easily
be tied to a more negative voltage, thus overriding the
internal reference.
TEST
The TEST pin serves two functions. On the TC7117/
TC7117A, it is coupled to the internally-generated digital
supply through a 500
resistor. Thus, it can be used as a
Figure 7. Clock Circuits
TC7116/TC7116A
TC7117/TC7117A
TO
COUNTER
38
CRYSTAL
RC NETWORK
40
EXT
OSC
39
TO TEST PIN ON TC7116/TC7116A
TO GROUND PIN ON TC7117/TC7117A
Figure 6. Exclusive “OR” Gate for Decimal Point Drive
TC7116
TC7116A
DECIMAL
POINT
SELECT
V+
V+
TEST
GND
4030
TO LCD
DECIMAL
POINTS
BP
Figure 5. Simple Inverter for Fixed Decimal Point
3-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTERS WITH HOLD
TC7116
TC7116A
TC7117
TC7117A
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC7116AIJL | Circular Connector; No. of Contacts:53; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:18; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:18-53 RoHS Compliant: No |
| TC7117AIJL | JT 53C 53#22 SKT PLUG |
| TC7116CKW | 3-1/2 Digit Analog-to-Digital Converters with Hold |
| TC7116IJL | 3-1/2 Digit Analog-to-Digital Converters with Hold |
| TC7117CKW | 3-1/2 Digit Analog-to-Digital Converters with Hold |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC7117IJL | 功能描述:LED顯示驅(qū)動器 3-1/2 Digit A/D w/ Hold RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| TC7117RCPL | 功能描述:LED顯示驅(qū)動器 w/Hold RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube |
| TC711A | 制造商:Thomas & Betts 功能描述:Fittings Connector 0.5inch Steel |
| TC711A-RT | 制造商:Thomas & Betts 功能描述:Fittings Connector 0.5inch Steel |
| TC7126 | 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:3-1/2 Digit Analog-to-Digital Converters |
發(fā)布緊急采購，3分鐘左右您將得到回復。