FEATURES
s Low Temperature Drift Internal Reference TC7126 ....................................... 80 ppm/°C Typ TC7126A ..................................... 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 2 3 4 5 6 7 GENERAL DESCRIPTION
Seven-segment decoders, digit and polarity drivers, voltage reference, and clock circuit are integrated on-chip. A low-cost, high-resolution indicating meter requires only a display, four resistors, and four capacitors. The TC7126A reduces linearity error to less than 1 count. Roll-over error (the difference in readings for equal magnitude but opposite polarity input signals) is below ±1 count.
TelCom
