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| 型号： | TC7135CBUTR |
| 元件分类： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, ACCESS, PQFP64 |
| 封装： | PLASTIC, QFP-64 |
| 文件页数： | 14/16页 |
| 文件大小： | 217K |
| 代理商： | TC7135CBUTR |
7
TC7135
4-1/2 DIGIT
ANALOG-TO-DIGITAL CONVERTER
TC7135-10 9/27/99
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 or LED display with the TC7211A (LCD) 4-digit
display driver.
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
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+
IREF
TC7135
V–
V+
ANALOG
GROUND
ANALOG
COMMON
REF
IN
TC7135
ANALOG
COMMON
TC05
相关PDF资料 |
PDF描述 |
|---|---|
| TC7135CPI | 1-CH 9-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PDIP28 |
| TC7135CBURT | 1-CH DUAL-SLOPE ADC, ACCESS, PQFP64 |
| TC7135CLI | 1-CH DUAL-SLOPE ADC, PQCC28 |
| TC7135CBUTR | 1-CH DUAL-SLOPE ADC, PQFP64 |
| TC7135CKW | 1-CH DUAL-SLOPE ADC, PQFP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7135CKW | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit A/D Converter |
| TC7135CLI | 功能描述:LED显示驱动器 4-1/2 Digit A/D BCD RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7135CLI713 | 功能描述:LED显示驱动器 4-1/2 Digit A/D BCD RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7135CPI | 功能描述:LED显示驱动器 4-1/2 Digit A/D BCD RoHS:否 制造商:Micrel 数位数量:5 片段数量: 安装风格:SMD/SMT 封装 / 箱体:PLCC-44 工作电源电压:4.75 V to 11 V 最大电源电流:10 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| TC7135CPL | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4-1/2 Digit A/D Converter |
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