- 您现在的位置：买卖IC网 > PDF目录1880 > TC7129CLW713 (Microchip Technology)IC ADC 4 1/2DGT LCD DVR 44-PLCC PDF资料下载
参数资料
| 型号： | TC7129CLW713 |
| 厂商： | Microchip Technology |
| 文件页数： | 9/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 4 1/2DGT LCD DVR 44-PLCC |
| 标准包装： | 500 |
| 显示器类型： | LCD |
| 配置： | 7 段显示 |
| 数字或字符： | A/D，4.5 位数字 |
| 电流 - 电源： | 800µA |
| 电源电压： | 6 V ~ 12 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC |
| 包装： | 带卷 (TR) |
第1页第2页第3页第4页第5页第6页第7页第8页当前第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
TC7129
3.5
Voltage Reference
(D REF , R REF , R BIAS , C RF )
The reference potentiometer (R REF ) provides an
+5V
TC7129
adjustment for adjusting the reference voltage; any
value above 20 k Ω is adequate. The bias resistor
(R BIAS ) limits the current through D REF to less than
150 μ A. The reference filter capacitor (C RF ) forms an
RC filter with R BIAS to help eliminate noise.
0.1 μF
24
V+
REF HI
REF LO
34
35
0.1 μF
3.6 Input Filter (R IF , C IF )
For added stability, an RC input noise filter is usually
included in the circuit. The input filter resistor value
should not exceed 100 k Ω . A typical RC time constant
value is 16.7 msec to help reject line frequency noise.
36 DGND
COMMON
IN HI
0.1 μF IN LO
28
33
32
V IN
+
–
The input filter capacitor should have low leakage for a
high-impedance input.
V–
23
3.7
Battery
-5V
The typical circuit uses a 9V battery as a power source.
However, any value between 6V and 12V can be used.
Figure 4-1:
Powering the TC7129 From
For operation from batteries with voltages lower than
a ±5V Power Supply.
6V and for operation from power supplies, see
4.2.2
Low Voltage Battery Source
A battery with voltage between 3.8V and 6V can be
4.0
4.1
TYPICAL APPLICATIONS
TC7129 as a Replacement Part
used to power the TC7129 when used with a voltage
doubler circuit, as shown in Figure 4-2. The voltage
doubler uses the TC7660 DC-to-DC voltage converter
and two external capacitors.
The TC7129 is a direct pin-for-pin replacement part for
the ICL7129. Note, however, that the ICL7129 requires
a capacitor and resistor between pins 26 and 28 for
24
phase compensation. Since the TC7129 uses internal
phase compensation, these parts are not required and,
in fact, must be removed from the circuit for stable
operation.
+
3.8V
to
36
V+
REF HI
DGND
REF LO
34
35
4.2 Powering the TC7129
While the most common power source for the TC7129
is a 9V battery, there are other possibilities. Some of
the more common ones are explained below.
6V
8
2
COMMON
TC7129
IN HI
IN LO
V–
28
33
32
+
V IN
–
4.2.1
±5V Power Supply
TC7660
4
+
10 μF
23
Measurements are made with respect to power supply
ground. DGND (pin 36) is set internally to about 5V less
5
than V + (pin 24); it is not intended to be a power supply
input and must not be tied directly to power supply
ground. It can be used as a reference for external logic,
3
10 μF
+
? 2006 Microchip Technology Inc.
Figure 4-2: Powering the TC7129 From
a Low-Voltage Battery.
DS21459D-page 9
相关PDF资料 |
PDF描述 |
|---|---|
| TC7135CLI713 | IC ADC 4 1/2DGT 28-PLCC |
| TC7136CKW713 | IC ADC 3 1/2DGT LOW PWR 44-MQFP |
| TC7660MJA | IC REG SWITCHD CAP INV ADJ 8CDIP |
| TC820CKW713 | IC ADC 3 3/4DGT LGC PROBE 44MQFP |
| TC835CBU | IC ADC 4 1/2DGT BCD 64-MQFP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7129CPL | 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 |
| TC7129CPL713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129IJL713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129IKW713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
| TC7129ILW713 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit Analog-to-Digital Converters with On-Chip LCD Drivers |
发布紧急采购，3分钟左右您将得到回复。