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Programmable instrumentation amplifier IC with the largest temperature deviation

by:Sure     2021-08-23
American Analog Devices (Analog Devices) released the instrumentation amplifier ICAD8231 with gain programmable function and the deviation of offset voltage with temperature variation is only 50nV/℃. This is the first time the company has put into production an instrumentation amplifier equipped with gain programming and zero offset that suppresses voltage deviations caused by temperature changes. Prior to this, the company's American analog devices (Analog Devices) with gain programmable power released the instrumentation amplifier IC 'AD8231' with a gain programmable function and the deviation of offset voltage with temperature changes of only 50nV/℃. This is the first time the company has put into production an instrumentation amplifier equipped with gain programming and zero offset that suppresses voltage deviations caused by temperature changes. Prior to this, the company's products with gain program control did not support zero offset. On the contrary, products that support zero offset did not have gain program control. Instrumentation amplifiers are generally used in fields that require high precision. 'The new products are expected to be used in this field under harsh temperature and noise environments' (analog devices). Specifically, it can be used in industrial applications such as pressure sensors, temperature sensors, and control equipment. Benefit can be set by 3bit digital control signal. Specifically, you can choose from 8 types of 1, 2, 4, 8, 16, 32, 64, and 128. The gain can be controlled to increase the gain when the signal amplitude of the input amplifier is small, and decrease the gain when the amplitude is large. The in-phase signal cancellation ratio (CMRR) is at least 80dB when the gain is equal to 1, and the minimum is 122dB when the gain is equal to 128. The operating temperature range is -40°C to +125°C. In addition to the main instrumentation amplifier, an operational amplifier is also integrated. With this structure, it is possible to reduce the number of components of peripheral circuits such as level shift circuits, gain adjustment circuits, thin film circuits, and differential output circuits that are conventionally composed of external components. With the 16-pin LFCSP small package, it can also reduce the package area and lower the price.   Prior to this, competitors of analog devices had introduced instrumentation amplifiers equipped with gain programming and zero offset. Analog devices point out that new products have several advantages over existing products. One of them is the integrated operational amplifier, lower noise and greater bandwidth. For example, the noise level is only 32nV/√Hz, and the bandwidth is 1MHz when the gain is equal to 1. 'Compared with the existing products, the noise of the new product is only about 5 points 1 of the existing product, and the bandwidth has reached 5 times' (analog device).  The manufacturing of products will use the company's self-developed iCMOS process for analog ICs. The power supply adopts +3.3~+5V single power supply, which can be easily installed on the same base plate with the A-D converter and microcontroller using the same power supply. Has started to supply samples,
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