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TC811 Fiches technique(PDF) 1 Page - TelCom Semiconductor, Inc |
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TC811 Fiches technique(HTML) 1 Page - TelCom Semiconductor, Inc |
1 / 12 page 3-137 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 TC811 TC811CPL THOUSANDS HUNDREDS TENS UNITS 4 39 OSC V TEST TO SWITCH DRIVERS FROM COMPARATOR OUTPUT CLOCK 7 SEGMENT DECODE 40 2 OSC1 CONTROL LOGIC 26 500 Ω DATA LATCH + BUFF CREF – RINT V + CAZ VINT 28 29 27 34 36 35 10 µA 31 ZI & A/Z INT AZ & DE ( ±) 32 INT 26 INTEGRATOR TO DIGITAL SECTION DE (+) DE (–) DE (+) DE (–) ANALOG COMMON C REF + V IN + V IN – V CINT VREF + VREF – ZI & A/Z CREF + 33 + – LCD SEGMENT DRIVERS 200 BACKPLANE fOSC V – VTH = 1V V – + – INTERNAL DIGITAL GOUND LOW TEMPCO VREF COMPARATOR – A/Z ZI V+– 3.0V 38 470k 10pF 7 SEGMENT DECODE 7 SEGMENT DECODE 21 TYPICAL SEGMENT OUTPUT INTERNAL DIGITAL GROUND SEGMENT OUTPUT V + 0.5mA 2mA 6.2V LCD DISPLAY + – 38 20pF V + V + 22M Ω HLDR ≈70kΩ A/Z 30 kH 1 FUNCTIONAL BLOCK DIAGRAM ORDERING INFORMATION Temp. Max VREF Part No. Package Range Tempco TC811CKW 44-PQFP 0 °C to +70°C 75 ppm/°C TC811CPL 40-Pin Plastic DIP 0 °C to +70°C 75 ppm/°C 3-1/2 DIGIT A/D CONVERTER WITH HOLD AND DIFFERENTIAL REFERENCE INPUTS FEATURES s Differential Reference Input s Display Hold Function s Fast Over-Range Recovery, Guaranteed Next Reading Accuracy s Low Temperature Drift Internal Reference ....................................... 35ppm/ °C (Typ) s Guaranteed Zero Reading With Zero Input s Low Noise ..................................................... 15 µVp-p s High Resolution (0.05%) and Wide Dynamic Range (72 dB) s High Impedance Differential Input s Low Input Leakage Current ....................... 1pA Typ 10pA Max s Direct LCD Drive – No External Components s Precision Null Detection with True Polarity at Zero s Crystal Clock Oscillator s Available in DIP, Compact Flat Package or PLCC s Convenient 9V Battery Operation with Low Power Dissipation (600 µA Typical, 1mW Maximum) TYPICAL APPLICATIONS s Thermometry s Digital Meters — Voltage/Current/Power — pH Measurement — Capacitance/Inductance — Fluid Flow Rate/Viscosity — Humidity — Position s Panel Meters s LVDT Indicators s Portable Instrumentation s Digital Scales s Process Monitors s Gaussometers s Photometers TC811-7 11/5/96 |
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