参数资料
型号: TC820CPL
元件分类: ADC
英文描述: 1-CH DUAL-SLOPE ADC, PDIP40
封装: PLASTIC, DIP-40
文件页数: 6/28页
文件大小: 616K
代理商: TC820CPL
TC820
DS21476B-page 14
2002 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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