参数资料
型号: TC820C/PL
元件分类: ADC
英文描述: 1-CH 3-BIT DUAL-SLOPE ADC, PARALLEL ACCESS, PDIP40
封装: 0.600 INCH, PLASTIC, DIP-40
文件页数: 6/34页
文件大小: 435K
代理商: TC820C/PL
TC820
DS21476C-page 14
2007 Microchip Technology Inc.
FIGURE 3-7:
Common Mode Voltage Removed In Battery Operation With VIN = Analog Common.
FIGURE 3-8:
Common Mode Voltage Reduces Available Integrator Swing (VCOM VIN).
TC820
GND
V+ V-
V+
V-
Measured
System
Power
Source
9V
VIN+
VDD
VSS
VREF+
VREF-
VIN-
VBUF
CAZ
BP1
VINT
BP3
BP2
OSC1
OSC2
OSC3 NC
Segment
Drive
LCD
Analog
Common
+
+
RI
CI
VI
VIN
Integrator
Input Buffer
+
TI = Integration Time =
CI = Integration Capacitor
RI = Integration Resistor
4000
FOSC
VCM
Where:
VI =
[
VCM – VIN
TI
RI CI
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