Appreciation amplifier technology see amplifier market and application development trends

Texas Instruments Semiconductor Group business development engineer º Wang Sheng Jun¡¡8610 from analog and mixed-signal chips, particularly amplifier products development trend, high integration, taking into account the speed and precision, low power, wide temperature range, as well as software controllable performance, will be the future individual analog device vendor's new product rendering of the new features. For some, the low cost of electronic products, makes local pressure in small-scale IC vendor receives good development opportunity to break the American supplier are governed by, and this will also be including amplifiers, analog class characteristic of the product. Amplifier products development main characteristics are as follows: (1) new technology, new technology development; and (2) amplifier products in the electronic system more and more important, irreplaceable, high-precision zoom-structured integration of the circuit is very difficult to deal with the chip; (3) the "customization" needs the kind of the amplifier and an increasing number of one of the main driving force. Workmanship, TI BiCom3 is targeted at high speed simulation products and technology, pioneered by its high voltage versions to 36V Bipolar BiCom3HV SiGe process, taking into account the speed but also for high voltage applications; HPA07 technology is mainly used in high-precision simulation products, the application of this technology for devices with high precision, small package, high SNR characteristics, similar HPA07HV compatible application 36V; in addition to the above representative process, TI and LBC process, the main feature is the high voltage power; the main application is A035 process high-density devices. High precision operational amplifier generally refers to offset voltage is lower than the amplifier 1mV. TI recently introduced a new high precision operational amplifier OPA211, BiCom3HV process development for major products. At the high-speed amplifiers, TI can apply new technology to provide for different applications of all kinds of products, in addition to providing various voltage feedback and current feedback high speed amplifier products, you can provide high speed JFET-input, high-speed amplifier products, including a range of available models, such as OPA656, OPA657 and THS4631, they all have different bandwidth and slew rate, different stability gain range, including independent gain stability and other main choice of indicators, which can be widely used in test and measurement, and other broadband high input impedance applications. At the high-speed video amplifiers, TI has launched a series of flexible programmable and highly integrated amplifier products, such as for video applications THS73xx series products, tailored for different video standards, it integrates low-pass filter, some products have internal fixed-gain amplifier, filter bandwidth digital programmable options, as well as the input coupling mode select Properties. With the increasing tension in energy sources, energy efficiency requirements are also gradually increasing, especially for battery power, the power consumption requirements for more demanding, so the future for most efficient class d amplifier applications will gradually increase. However, class-d power amplifier and does not completely replace linear amplifier, high-end professional audio, due to the linear amplifier fidelity features Hi-Fi areas will assume linear amplifier products. But for intensive in the low-end market, class-d power amplifier is very optimistic about the prospects of the market. Engineers in the selection of amplifier types of IC, first global consideration of the entire system of performance requirements, and take full account of the need to adjust or received signal characteristics, while also taking into account the system of environmental and other factors, especially for industrial applications, this point is particularly important. In addition, you should consider the following: 1. high precision or high speed amplifiers, power must have a bypass capacitor, and as far as possible to bypass capacitor close to the amplifier power pins placed; 2. certain amplifier gain with minimum stability, if the gain is less than the recommended minimum stable gain, it is possible to produce oscillation. Current feedback amplifiers in direct feedback loop, do not use capacitors or other nonlinear components, especially for high speed amplifier design, this is particularly important; 3. in addition to high-speed application, bandwidth and slew rate is another important indicators, high signal-to-rail output frequency relationship with SR: F = Slew Rate/(0.707 p VoutPP), designed to take full account of this factor; 4. To decrease the input bias current of offset voltage, designers should remain operational amplifier-phase input and invert input impedance matching; 5. the noise factor, you need to consider the sources of noise include: input current noise, input voltage noise, and the gain setting of thermal noise, etc. Especially for single-supply applications, low voltage, in order to maintain system-to-noise ratio, low voltage allows designers to reduce noise. Amplifier design considered by many factors, engineers need according to the different design requirements, choosing the right amplifier products. At the same time, the amplifier vendor service and support can make the project designers to achieve a multiplier effect.