GENERAL DESCRIPTION
The TC7136 and TC7136A are low-power, 3-1/2 digit with liquid crystal display (LCD) drivers with analog-to-digital converters. These devices incorporate an "integrator output zero" phase which guarantees overrange recovery. The performance of existing TC7126, TC7126A and ICL7126-based systems may be upgraded with minor changes to external, passive components.

FEATURES
■ Fast Overrange Recovery, Guaranteed First Reading Accuracy
■ Low Temperature Drift Internal Reference
    TC7136 ....................................... 70 ppm/°C Typ
    TC7136A ..................................... 35 ppm/°C Typ
■ Guaranteed Zero Reading With Zero Input
■ Low Noise .................................................... 15 µVP-P
■ High Resolution .............................................. 0.05%
■ Low Input Leakage Current ...................... 1 pA Typ
                                                                       10 pA Max
■ Precision Null Detectors With True Polarity at Zero
■ High-Impedance Differential Input
■ Convenient 9V Battery Operation With
    Low Power Dissipation ........................ 500 µW Typ
                                                                   900 µW Max

TYPICAL APPLICATIONS
■ Thermometry
■ Bridge Readouts: Strain Gauges, Load Cells, Null Detectors
■ Digital Meters: Voltage/Current/Ohms/Power, pH
■ Digital Scales, Process Monitors
■ Portable Instrumentation