DESCRIPTION

· The TC7126A is a 3-1/2 digit CMOS Analog-to-Digital Converter (ADC) integrating seven-segment decoders, digit and polarity drivers, voltage reference, and clock circuit.

· It directly drives a Liquid Crystal Display (LCD) and includes a backplane driver, requiring only a display, four resistors, and four capacitors for a low-cost, high-resolution indicating meter.

· Ideal for portable applications due to its extremely low-power drain and 9V battery operation.

FEATURES

· Internal Reference with Low Temperature Drift: TC7126: 80ppm/°C, TC7126A: 35ppm/°C.

· Zero Reading with Zero Input and Low Noise: 15μVP-P.

· High Resolution: 0.05% and Low Input Leakage Current: 1pA Typ., 10pA Max.

· Precision Null Detectors with True Polarity at Zero and High-Impedance Differential Input.

· Convenient 9V Battery Operation with Low-Power Dissipation: 500μW Typ., 900μW Max.

APPLICATIONS

· Thermometry and Bridge Readouts: Strain Gauges, Load Cells, Null Detectors.

· Digital Meters and Panel Meters: Voltage/Current/Ohms/Power, pH.

· Digital Scales and Process Monitors.