GC7137AD Datasheet – 3.5-digit LED Display A/D Converter

GC7137AD is a high-performance, low-cost 3.5-digit A/D converter circuit. It contains seven-segment decoder, scan display driver, reference source and clock system, which can directly drive LED to display characters.

GC7137A combines high precision, versatility and low-cost applications together. It has an automatic zero calibration function of less than 10µV, a zero drift of less than 1µV/℃, an input current of less than 10pA, and a polarity conversion error of less than one digit. . The GC7137’s integrated differential input and differential reference works well in a variety of systems. It can be widely used in various single-chip measuring units and display heads.

GC7137A is designed according to the requirements of single power supply and low voltage power supply. When the single power supply is 5V power supply, all A/D conversion functions and parameter indicators can be realized. In order to realize low voltage operation, a 2.4V precision bandgap reference source is designed in the chip , ensuring symmetrical power supply and excellent temperature characteristics at low voltage. The choice of single/dual power supply is especially beneficial to the user’s application in different reference potential situations.

GC7137A can be used to assemble various digital instruments or monitoring instruments in CNC systems, and is widely used in the measurement of various physical quantities such as voltage, current, temperature, and pressure.