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| 型号： | TC7129CKW |
| 厂商： | Microchip Technology |
| 文件页数： | 15/28页 |
| 文件大小： | 0K |
| 描述： | IC ADC 4 1/2DGT LCD DVR 44-MQFP |
| 标准包装： | 96 |
| 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-QFP |
| 供应商设备封装： | 44-PQFP（10x10） |
| 包装： | 托盘 |
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TC7129
4.11
Integrator Section
The integrator section includes the integrator, compar-
ator, input buffer amplifier and analog switches (see
–
during the separate measurement phases described
earlier. (See Figure 4-12).
TABLE 4-2:
SWITCH LEGENDS
IN HI
+
Buffer
Label
Label
DE
DE–
Description
Meaning.
Open during all de-integrate phases.
Closed during all de-integrate phases when
COM
IN LO
TC7129
DE+
input voltage is negative.
Closed during all de-integrate phases when
input voltage is positive.
200 mV
V
–
+
500 k Ω
To Display Driver
(Not Latched)
INT 1
Closed during the first integrate phase
(measurement of the input voltage).
CONT
INT 2
INT
REST
ZI
X10
Closed during the second integrate phase
(measurement of the amplifier offset).
Open during both integrate phases.
Closed during the rest phase.
Closed during the zero integrate phase.
Closed during the X10 phase.
Figure 4-13:
Continuity Indicator Circuit.
TC7129
X10 Open during the X10 phase.
The buffer amplifier has a common mode input voltage
range from 1.5V above V– to 1V below V+. The integra-
tor amplifier can swing to within 0.3V of the rails.
However, for best linearity, the swing is usually limited
to within 1V. Both amplifiers can supply up to 80 μ A of
output current, but should be limited to 20 μ A for good
linearity.
DP 4 /OR, Pin 20
DP 3 /UR, Pin 21
LATCH/HOLD Pin 22
CONTINUITY, Pin 27
Figure 4-14:
500 k Ω
Input/Output Pin Schematic.
4.12
Continuity Indicator
4.13
Common and Digital Ground
A comparator with a 200 mV threshold is connected
between IN HI (pin 33) and IN LO (pin 32). Whenever
the voltage between inputs is less than 200 mV, the
CONTINUITY output (pin 27) will be pulled high,
activating the continuity annunciator on the display.
The continuity pin can also be used as an input to drive
the continuity annunciator directly from an external
source (see Figure 4-13).
A schematic of the input/output nature of this pin is also
? 2006 Microchip Technology Inc.
The common and digital ground (DGND) outputs are
generated from internal Zener diodes. The voltage
between V+ and DGND is the internal supply voltage
for the digital section of the TC7129. Common can
source approximately 12 μ A; DGND has essentially no
source capability (see Figure 4-15).
DS21459D-page 15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7129CKW713 | 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 |
| TC7129CLW | 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 |
| TC7129CLW713 | 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 |
| 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 |
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