关键词: 高压模拟开关, 正负双电源, 使能控制

Abstract: At present, the market demand of analog switch is huge, and the analog switch is developing towards the direction of higher working voltage and diversified logic control. According to the market demand and based on the high voltage BCD process, a 16 out of 1 high voltage analog switch circuit with enable control is designed. Both positive and negative power supply and single power supply can be used in the circuit. The circuit can work normally in a wide range of high voltage power supply, which is ±4.5-±20 V for dual power supply and 4.5-40 V for single power supply. Its performance parameters can be perfectly realized in the range of ±4.5-±20 V for dual power supply and 4.5-40 V for single power supply. The circuit designed in this paper has 16 analog CMOS switches, an ultrafast transmission rate of 5 MHz, an ultralow power consumption of 28 mW, a low on resistance, a 10 MHz ultrafast read-write and zero clearing function, as well as an enabling control function. The circuit adopts the domestic high-voltage process tape out technology. The circuit has been tested and verified that the electrical parameters meet the design requirements. It has stable and reliable performance and strong practicability. It can be widely used in communication system, power control system, microprocessor interface and other fields.

Key words: highvoltageanalogswitch, positiveandnegativepowersupply, enablecontrol