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参数资料
| 型号： | TC7116AIJL |
| 元件分类： | ADC |
| 英文描述： | 1-CH 13-BIT DUAL-SLOPE ADC, ACCESS, CDIP40 |
| 封装： | CERDIP-40 |
| 文件页数： | 16/17页 |
| 文件大小： | 221K |
| 代理商： | TC7116AIJL |
8
3-1/2 DIGIT ANALOG-TO-DIGITAL
CONVERTERS WITH HOLD
TC7116
TC7116A
TC7117
TC7117A
TC7116
TC7116A
BP
TEST
37
21
V+
GND
TO LCD
DECIMAL
POINT
TO LCD
BACK-
PLANE
4049
V+
REF
V+
1.2V
REF
COMMON
TC7116
TC7116A
TC7117
TC7117A
6.8 k
V+
TC9491CZM
20k
Figure 4. Using an External Reference
tions, the integrator swing can be reduced to less than the
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
–
IN return during auto-
zero and deintegrate. If V
–
IN is different from analog common,
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
–
IN 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 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 30mA or more of current to hold the
voltage 3V below the positive supply (when a load is trying
to pull the analog common line positive). However, there is
only 10
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
CRYSTAL
RC NETWORK
40
38
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
相关PDF资料 |
PDF描述 |
|---|---|
| TC7116IJL | 1-CH 13-BIT DUAL-SLOPE ADC, ACCESS, CDIP40 |
| TC7116ACLWRT | 1-CH DUAL-SLOPE ADC, ACCESS, PQCC44 |
| TC7116CLWRT | 1-CH DUAL-SLOPE ADC, ACCESS, PQCC44 |
| TC7116CLWTR | 1-CH 13-BIT DUAL-SLOPE ADC, PQCC44 |
| TC7116CLW | 1-CH 13-BIT DUAL-SLOPE ADC, ACCESS, PQCC44 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7116CKW | 功能描述:LCD 驱动器 w/Hold 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 |
| TC7116CKW713 | 功能描述:LCD 驱动器 w/Hold 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 |
| TC7116CLW | 功能描述:LCD 驱动器 w/Hold 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 |
| TC7116CLW713 | 功能描述:LCD 驱动器 w/Hold 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 |
| TC7116CPL | 功能描述:LCD 驱动器 w/Hold 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 |
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