CHAPTER 3 METHODOLOGY 3.1 Overview The Water Monitoring ...

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ADC0802, ADC0803, ADC0804Functional DiagramRD2READCSWR13SETQ“1” = RESET SHIFT REGISTER“0” = BUSY AND RESET STATE RESETCLK R19CLK IN410DGNDV+ 20(V REF )9V REF /2CLK OSCCLKGENCLK ACLKSG1LADDERANDDECODERRESETSTART F/FINPUT PROTECTIONFOR ALL LOGIC INPUTSINPUTTO INTERNALCIRCUITSBV = 30VSUCCESSIVEAPPROX.REGISTERAND LATCHCLK BMSBCLKDDFF1QD8-BITSHIFTREGISTERRSTARTCONVERSIONIF RESET = “0”RESETINTR F/FAGND8DACV OUTLSBQV+CLK ADV IN (+)V IN (-)67+∑--+COMPMSBTHREE-STATEOUTPUT LATCHESLSBXFERG2DFF2QSETCONV. COMPL.Q5INTR11 12 13 14 15 16 17 18DIGITAL OUTPUTSTHREE-STATE CONTROL“1” = OUTPUT ENABLE8 X 1/f6-6
ADC0802, ADC0803, ADC0804Absolute Maximum RatingsSupply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5VVoltage at Any Input . . . . . . . . . . . . . . . . . . . . . . -0.3V to (V + +0.3V)Operating ConditionsTemperature RangeADC0802/03LD. . . . . . . . . . . . . . . . . . . . . . . . . . . -55 o C to 125 o CADC0802/03/04LCD . . . . . . . . . . . . . . . . . . . . . . . . -40 o C to 85 o CADC0802/03/04LCN . . . . . . . . . . . . . . . . . . . . . . . . . .0 o C to 70 o CADC0803/04LCWM . . . . . . . . . . . . . . . . . . . . . . . . -40 o C to 85 o C<strong>The</strong>rmal Information<strong>The</strong>rmal Resistance (Typical, Note 1) θ JA ( o C/W) θ JC ( o C/W)PDIP Package . . . . . . . . . . . . . . . . . . . . . 125 N/ACERDIP Package . . . . . . . . . . . . . . . . . . 80 20SOIC Package . . . . . . . . . . . . . . . . . . . . . 120 N/AMaximum Junction TemperatureHermetic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 o CPlastic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 o CMaximum Storage Temperature Range . . . . . . . . . .-65 o C to 150 o CMaximum Lead Temperature (Soldering, 10s) . . . . . . . . . . . . 300 o C(SOIC - Lead Tips Only)CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operationof the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.NOTE:1. θ JA is measured with the component mounted on an evaluation PC board in free air.Electrical Specifications (Notes 1, 7)PARAMETER TEST CONDITIONS MIN TYP MAX UNITSCONVERTER SPECIFICATIONS V+ = 5V, T A = 25 o C and f CLK = 640kHz, Unless Otherwise SpecifiedTotal Unadjusted ErrorADC0802 V REF /2 = 2.500V - - ± 1 / 2 LSBADC0803V REF /2 Adjusted for Correct FullScale Reading- - ± 1 / 2 LSBADC0804 V REF /2 = 2.500V - - ±1 LSBV REF /2 Input Resistance Input Resistance at Pin 9 1.0 1.3 - kΩAnalog Input Voltage Range (Note 2) GND-0.05 - (V+) + 0.05 VDC Common-Mode Rejection Over Analog Input Voltage Range - ± 1 / 16 ± 1 / 8 LSBPower Supply Sensitivity V+ = 5V ±10% Over Allowed InputVoltage Range- ± 1 / 16 ± 1 / 8 LSBCONVERTER SPECIFICATIONS V+ = 5V, 0 o C to 70 o C and f CLK = 640kHz, Unless Otherwise SpecifiedTotal Unadjusted ErrorADC0802 V REF /2 = 2.500V - - ± 1 / 2 LSBADC0803V REF /2 Adjusted for Correct FullScale Reading- - ± 1 / 2 LSBADC0804 V REF /2 = 2.500V - - ±1 LSBV REF /2 Input Resistance Input Resistance at Pin 9 1.0 1.3 - kΩAnalog Input Voltage Range (Note 2) GND-0.05 - (V+) + 0.05 VDC Common-Mode Rejection Over Analog Input Voltage Range - ± 1 / 8 ± 1 / 4 LSBPower Supply Sensitivity V+ = 5V ±10% Over Allowed InputVoltage Range- ± 1 / 16 ± 1 / 8 LSBCONVERTER SPECIFICATIONS V+ = 5V, -25 o C to 85 o C and f CLK = 640kHz, Unless Otherwise SpecifiedTotal Unadjusted ErrorADC0802 V REF /2 = 2.500V - - ± 3 / 4 LSBADC0803V REF /2 Adjusted for Correct FullScale Reading- - ± 3 / 4 LSBADC0804 V REF /2 = 2.500V - - ±1 LSBV REF /2 Input Resistance Input Resistance at Pin 9 1.0 1.3 - kΩAnalog Input Voltage Range (Note 2) GND-0.05 - (V+) + 0.05 VDC Common-Mode Rejection Over Analog Input Voltage Range - ± 1 / 8 ± 1 / 4 LSBPower Supply Sensitivity V+ = 5V ±10% Over Allowed InputVoltage Range- ± 1 / 16 ± 1 / 8 LSB6-7
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CHAPTER 3METHODOLOGY3.1 OverviewThe
Page 3 and 4:
3.2.2 Analog To Digital Conversion
Page 5 and 6:
Figure 3.5: Source Code for Convers
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3.2.4 Water Monitoring System Circu
Page 9 and 10:
3.3 Programming.Programming is the
Page 11 and 12:
ISP flash programmer in Figure 3.11
Page 13 and 14:
The Visual Basic program will start
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Distance(cm)ReadingVoltage Trial1 (
Page 17 and 18:
4.2 Signal ConversionA sensor has s
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4.3 User InterfaceBased on Table 4.
Page 21 and 22: Hardware DesignBasically, the const
Page 23 and 24: CHAPTER 5CONCLUSION5.1 SummaryWater
Page 25 and 26: This project can be expanded by usi
Page 27 and 28: APPENDICES41
Page 29 and 30: cjne a,volt,xsamejmp startxsame:mov
Page 31 and 32: xsame19:jnc more19mov dptr,#XVALIDc
Page 33 and 34: etrx:jnb ri,$clr rimov a,sbufretdel
Page 35 and 36: ElseShape8.FillColor = vbWhiteEnd I
Page 37 and 38: Private Sub Timer3_Timer()Label3.Ca
Page 39 and 40: APPENDIX EData Sheet AT89S5253
Page 41 and 42: Features• Compatible with MCS-51
Page 43 and 44: AT89S52Block DiagramP0.0 - P0.7P2.0
Page 45 and 46: AT89S52weakly pulled high. Setting
Page 47 and 48: AT89S52Table 3a. AUXR: Auxiliary Re
Page 49 and 50: AT89S52Watchdog Timer(One-time Enab
Page 51 and 52: AT89S52Figure 6. Timer 2 Auto Reloa
Page 53 and 54: AT89S52Baud Rate GeneratorTimer 2 i
Page 55 and 56: AT89S52Oscillator CharacteristicsXT
Page 57 and 58: AT89S52frequency should be less tha
Page 59 and 60: Figure 15. Flash Programming and Ve
Page 61 and 62: AT89S52Table 9. Serial Programming
Page 63 and 64: AT89S52Absolute Maximum Ratings*Ope
Page 65 and 66: AT89S52External Program Memory Read
Page 67 and 68: AT89S52Serial Port Timing: Shift Re
Page 69 and 70: Packaging Information44A, 44-lead,
Page 71: August 1997SemiconductorADC0802, AD
Page 75 and 76: ADC0802, ADC0803, ADC0804Electrical
Page 77 and 78: ADC0802, ADC0803, ADC0804Typical Pe
Page 79 and 80: ADC0802, ADC0803, ADC0804The device
Page 81 and 82: ADC0802, ADC0803, ADC0804V IN ±5VR
Page 83 and 84: ADC0802, ADC0803, ADC0804Figures 19
Page 85 and 86: ADC0802, ADC0803, ADC0804IRQ (4)†
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CHAPTER 3 METHODOLOGY 3.1 Overview The Water Monitoring ...

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