TC811

TC811 3-1/2 Digit Analog-To-Digital Converter with Hold and Differential Reference Inputs FEATURES s s s s s s s s s s s s s s Differential Reference Input Display Hold Function Fast Over-Range Recovery, Guaranteed Next Reading Accuracy Low Temperature Drift Internal Reference ....................................... 35ppm/°C (Typ) Guaranteed Zero Reading With Zero Input Low Noise ..................................................... 15µVp-p High Resolution (0.05%) and Wide Dynamic Range (72 dB) High Impedance Differential Input Low Input Leakage Current .................... 1pA (Typ) 10pA Max Direct LCD Drive -No External Components Precision Null Detection with True Polarity at Zero Crystal Clock Oscillator Available in DIP, Compact Flat Package or PLCC Convenient 9V Battery Operation with Low Power Dissipation (600µA Typical, 1mW Maximum) TYPICAL APPLICATIONS s s Thermometry Digital Meters — Voltage/Current/Power — pH Measurement — Capacitance/Inductance — Fluid Flow Rate/Viscosity — Humidity — Position Panel Meters LVDT Indicators Portable Instrumentation Digital Scales Process Monitors Gaussometers Photometers s s s s s s s ORDERING INFORMATION Part No. TC811CKW TC811CPL Package Temp. Range Max VREF Temp. Co. FUNCTIONAL BLOCK DIAGRAM 44-Pin PQFP 0°C to +70°C 75 ppm/°C 40-Pin Plastic DIP 0°C to +70°C 75 ppm/°C TYPICAL SEGMENT OUTPUT + V 0.5mA SEGMENT OUTPUT 2mA LCD DISPLAY INTERNAL DIGITAL GROUND BACKPLANE TC811CPL CREF RINT – C REF V BUFF 34 28 V + 38 29 INTEGRAT...