Analog IC market, how many ups and downs in the past few years, the global economic instability, 2012 is one of the worst year . According to the market research agency ,Databean, the statistics show that in 2012 analog IC revenue is of less than $ 40 billion, down 7% from 2011, this is just the tip of the iceberg, the entire semiconductor market in 2012 fell an average of 3%. In addition to the cable market, the other analog field performance is poor. Power, automotive and communications, the most promising restore vitality, computer, interface and data conversion products were subjected to the most severe impact. Texas Instruments is still the largest manufacturer of analog market share, revenues in 2012 of approximately $ 6.6 billion, accounting for 16.7% of the entire market. In 2011 Texas Instruments acquisition of National Semiconductor Corporation, proved very cost-effective deal, Texas Instruments Interface Products market share jumped to 27% from 23%, the analog power IC market share increased from 21% to 24% . The Recent Texas Instruments decided to restructure the business, the simulated market devoted more efforts to be to the rule. Despite the slowdown in China as well as the European debt crisis continued to cause oversupply, Texas Instruments remains resilient. STMicroelectronics has revenues of $ 3.6 billion in 2012, with a market share of more than 9%, came in second. And Texas Instruments, STMicroelectronics also sought to better allocate its resources in a depressed market environment, to exit Ericsson joint venture that will shift the focus of analog and power management products. Europe's top chip maker, STMicroelectronics, are likely to face similar overproduction and other related issues with the European Economic. ADI has revenues of $ 2.3 billion, the market share of 5.7% in the third, still down 8% over the same period last year. ADI  maintains the largest market share in the field of data conversion, revenue reached $ 1.1 billion in the field in 2012, occupied nearly half of the market. 2012 data conversion market as a whole fell by 14%, while the ADI fell by only 12%, and increase in market share compared to 2011. In the field of data conversion, ADI easily occupies 84% of the high-speed ADC market, and occupy 60% of the revenue of the entire ADC market, making the company a leading position in these two areas.