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参数资料
| 型号： | TC820CLW |
| 元件分类： | ADC |
| 英文描述： | 1-CH DUAL-SLOPE ADC, PQCC44 |
| 封装： | PLASTIC, LCC-44 |
| 文件页数： | 4/24页 |
| 文件大小： | 185K |
| 代理商： | TC820CLW |
12
3-3/4 A/D Converter with Frequency
Counter and Logic Probe
TC820
TC820-10 10/17/96
2001 Microchip Technology Inc.
DS21476A
In systems where common-mode voltages exist, the
86dB common-mode rejection ratio minimizes error. Com-
mon-mode voltages do, however, affect the integrator out-
put level. A worst-case condition exists if a large, positive
VCM exists in conjunction with a full-scale, negative differ-
ential signal. The negative signal drives the integrator out-
put positive along with VCM (Figure 9). For such applica-
tions, the integrator output swing can be reduced below the
recommended 2V full-scale swing. The integrator output
will swing within 0.3V of VDD or VDD without increased
linearity error.
Reference (VDD, VSS)
The TC820 reference, like the analog signal input, has
true differential inputs. In addition, the reference voltage
can be generated anywhere within the power supply volt-
age of the converter. The differential reference inputs per-
mit ratiometric measurements and simplify interfacing with
sensors, such as load cells and temperature sensors.
DP3
DP2
DP1
0Hz – 3999Hz
4kHz – 39.99kHz
40kHz – 399.9kHz
400kHz
≥
DP3
DP2
DP1
NONE
DECIMAL POINT
fIN
Figure 5. TC820 Auto-Range Decimal Point Selection
vs. Frequency Counter Input
HIGH
LOW
LCD
DRIVERS
DISABLE A/D CONVERTER
TO
BUZZER
DP0/LO
DP1/HI
LOGIC
CMOS
LOGIC
LEVELS
EXTERNAL
LOGIC LEVEL
DETECTION
AND PULSE
STRETCHING
VDD
TC820
LOGIC
PROBE
INPUT
NC
LCD
Figure 6. Logic Probe Simplified Schematic
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC820CLW713 | 功能描述:LCD 驱动器 3-3/4 A/D Converter 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 |
| TC820CPL | 功能描述:LCD 驱动器 3-3/4 A/D Converter 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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| TC8-20S4805R | 制造商:TRUMPOWER 制造商全称:Tumbler Technologies + TRUMPower 功能描述:DC/DC CONVERTERS 2:1 Input, 12.5 to 20 Watt |
| TC-821-SC | 制造商:Thomas & Betts 功能描述:Cable Accessories Thin Wall Conduit Fitting Zinc Die Cast |
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