当用户决定从双电源精密运算放大器转向单电源运算放大器时，势必会遇到问题。设计工程师们常 常面临成本高和必须采用全新器件的困惑。工程师们希望得到的运算放大器是在大批量产品市场中 既具有高性能又延长电池寿命。我们早期推出的低成本、自稳零运算放大器，由于牺牲了性能使工 程师们只好去购买价格很贵的新波放大器。为了解决这个问题， ＡＤＩ公司开发出ＯＰ７ｘ７系列和 ＡＤ８５５ｘ／ＡＤ８５７ｘ系列。 When a user decides to move from a dual-supply precision op amp to a single-supply op amp, there is bound to be a problem. Design engineers are often confused with the high costs and the need to introduce new devices. Engineers expect the op amps to deliver both high performance and extended battery life in high volume markets. Our earlier low-cost, self-zeroing op amps gave engineers the incentive to buy expensive new Boeing amplifiers at the expense of performance. To solve this problem, Analog Devices has developed the OP7x7 family and the AD855x / AD857x family.