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参数资料
| 型号： | TC7135CPI |
| 厂商： | Microchip Technology Inc. |
| 英文描述： | 4-1/2 Digit A/D Converter |
| 中文描述： | 4-1/2位A / D转换 |
| 文件页数： | 7/13页 |
| 文件大小： | 224K |
| 代理商： | TC7135CPI |
3-119
TELCOM SEMICONDUCTOR, INC.
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6
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8
TC7135
4-1/2 DIGIT
ANALOG-TO-DIGITAL CONVERTER
Digital Section Functional Description
The major digital subsystems within the TC7135 are
illustrated in Figure 6, with timing relationships shown in
Figure 7. The multiplexed BCD output data can be displayed
on an LCD with the TC7211A.
The digital section is best described through a discus-
sion of the control signals and data outputs.
RUN/HOLD Input
When left open, the RUN/HOLD (R/H) input (pin 25)
assumes a logic "1" level. With R/H = 1, the TC7135
performs conversions continuously, with a new measure-
ment cycle beginning every 40,002 clock pulses.
When R/H changes to logic "0," the measurement cycle
in progress will be completed, and data held and displayed,
as long as the logic "0" condition exists.
A positive pulse (>300nsec) at R/H initiates a new
measurement cycle. The measurement cycle in progress
when R/H initially assumed logic "0" must be completed
before the positive pulse can be recognized as a single
conversion run command.
The new measurement cycle begins with a 10,001-
count auto-zero phase. At the end of this phase, the busy
signal goes high.
Figure 6. Digital Section Functional Diagram
Figure 5. Using an External Reference Voltage
LATCH
LATCH
LATCH
LATCH
LATCH
COUNTERS
CONTROL LOGIC
MULTIPLEXER
POLARITY
D5
D4
D3
D2
D1
13 B1
14 B2
15 B4
16 B8
POLARITY
FF
MSB
DIGIT
DRIVE
SIGNAL
LSB
DATA
OUTPUT
24
22
25
27
28
26
21
DIGITAL
GND
CLOCK
IN
RUN/
HOLD
OVER–
RANGE
STROBE
BUSY
UNDER–
RANGE
ZERO
CROSS
DETECT
FROM
ANALOG
SECTION
20
k
6.8 k
V+
1.25V REF
TC04
V+
REF
IN
2.5V
REF
V+
I
REF
TC7135
V–
V+
ANALOG
GROUND
ANALOG
COMMON
REF
IN
TC7135
ANALOG
COMMON
TC05
相关PDF资料 |
PDF描述 |
|---|---|
| TC7135CBU | 4-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTER |
| TC7135CLI | 4-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTER |
| TC7135CPI | 4-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTER |
| TC7136 | LOW POWER, 3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS |
| TC7136 | Low Power 3-1/2 Digit Analog-to-Digital Converter |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7135CPL | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit A/D Converter |
| TC7136 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Low Power 3-1/2 Digit Analog-to-Digital Converter |
| TC7136A | 制造商:TELCOM 制造商全称:TelCom Semiconductor, Inc 功能描述:LOW POWER, 3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS |
| TC7136ACKW | 功能描述:LCD 驱动器 Low Power 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 |
| TC7136ACKW713 | 功能描述:LCD 驱动器 Low Power 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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