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参数资料
| 型号： | TC7135C/LI |
| 元件分类： | ADC |
| 英文描述： | 1-CH 4-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PQCC28 |
| 封装： | PLASTIC, LCC-28 |
| 文件页数： | 3/28页 |
| 文件大小： | 443K |
| 代理商： | TC7135C/LI |
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2007 Microchip Technology Inc.
DS21460D-page 11
TC7135
5.3
BUSY Output
At the beginning of the signal integration phase, BUSY
goes high and remains high until the first clock pulse
after the integrator zero crossing. BUSY returns to the
logic ‘0’ state once the measurement cycle ends in an
overrange condition. The internal display latches are
loaded during the first clock pulse after BUSY and are
latched at the clock pulse end. The BUSY signal does
not go high at the beginning of the measurement cycle,
which starts with the auto-zero cycle.
5.4
OVERRANGE Output
If the input signal causes the reference voltage integra-
tion time to exceed 20,000 clock pulses, the OVER-
RANGE output is set to a logic ‘1’. The OVERRANGE
output register is set when BUSY goes low and is reset
at the beginning of the next reference integration
phase.
5.5
UNDERRANGE Output
If the output count is 9% of full scale or less (-1800
counts), the UNDERRANGE register bit is set at the
end of BUSY. The bit is set low at the next signal
integration phase.
5.6
POLARITY Output
A positive input is registered by a logic ‘1’ polarity
signal. The polarity bit is valid at the beginning of
reference integrate and remains valid until determined
during the next conversion.
The polarity bit is valid even for a zero reading. Signals
less than the converter's LSB will have the signal
polarity determined correctly. This is useful in null
applications.
5.7
Digit Drive Outputs
Digit drive signals are positive-going signals. The scan
sequence is D5 to D1. All positive pulses are 200 clock
pulses wide, with the exception D5, which is 201 clock
pulses wide.
All five digits are scanned continuously, unless an
overrange condition occurs. In an overrange condition,
all digit drives are held low from the final STROBE
pulse until the beginning of the next reference integrate
phase. The scanning sequence is then repeated. This
provides a blinking visual display indication.
5.8
BCD Data Outputs
The binary coded decimal (BCD) bits B8, B4, B2 and B1
are positive-true logic signals. The data bits become
active at the same time as the digit drive signals. In an
overrange condition, all data bits are at a logic ‘0’ state.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 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 |
| 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 |
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