GENERAL DESCRIPTION
The TC811 is a low power, 3-1/2 digit, LCD display analog-to-digital converter. This device incorporates both a display hold feature and differential reference inputs. A crystal oscillator, which only requires two pins, permits added features while retaining a 40-pin package. An additional feature is an "Integrator Output Zero" phase which guarantees rapid input overrange recovery.

FEATURES
■ 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
■ 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