AD7820KP-REEL

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AD7820KP-REEL is a 10-bit analog to digital (A/D) converter, which is suited for low power, high speed, and small size applications. Based on successive approximation technique, the AD7820KP-REEL can simultaneously convert and sample multiple analog signals with a nominal conversion time 100 us and can sample up to 10 times per sec. The breakout board of the AD7820KP-REEL comes with different analog input configurations. At the center of the board are two SMA connectors which carry the common signal references. The two signal inputs to the converter (positive input and the negative input) can be connected to the SMA connectors, or the user can wire the signal inputs to two adjacent breakouts. On the side of the breakout board, two potentiometers can be used to set the gain and the offset. The board also comes with two LEDs which indicate the state of the converter.

The AD7820KP-REEL operates on 5V single power supply, and consumes only 7 mW of power. It has a power down mode, in which the power consumption is reduced to 0.3 mW. The converter has an internal reference voltage of 4.096V and a full-scale input voltage of 2.048V for the 10-bit resolution. It also has a wide supply voltage range of 3.0 to 5.5V and a temperature range of –40°C to +85°C.

The AD7820KP-REEL is suitable for data acquisition systems and industrial process control systems. It is used in applications such as temperature monitoring and control systems, power supply and other power management systems, motor control systems, and industrial communication systems. It is also used in medical and automotive applications, where size and accuracy are important.

The AD7820KP-REEL works on the principle of successive approximation. The A/D converter is a multi-step process, first determining the most significant bit (MSB) then the least significant bit (LSB). The successive approximation logic (SAR) converts the analog input signal into a digital equivalent in four clock cycles. The SAR converter compares the input signal with an internally generated reference, and based on the result, adjusts the digital equivalent information. This continues till the transition of the output is the same as the input.

At the start of the conversion cycle, all the bits in the digital equivalent information are set to 0. During the first clock cycle, the converter compares the input signal with the mid-code between the MSB and the LSB; that is the logic level at which the most significant bit transitions from 0 to 1. This comparison is performed using a comparator. If the input is greater than the mid-code, the MSB is set to 1 and the remaining bits are also set to 1; otherwise, the MSB is set to 0 and the remaining bits are set to 0. The comparison is then repeated for the second bit, and the process continues till all the bits in the digital equivalent information are set.

The AD7820KP-REEL can convert and sample up to 24 channels of analog input simultaneously. Its conversion time is fast (100 us) and it can sample up to 10 times per second. It has a wide supply voltage range of 3.0 to 5.5V and a temperature range of –40°C to +85°C. With these features, the AD7820KP-REEL is an ideal solution for data acquisition systems, temperature monitoring and control systems, frame grabbers, motor control systems and industrial communication systems.

In summary, the AD7820KP-REEL is a 10-bit A/D converter suitable for low power, high speed, and small size applications. It operates on a single power supply, consuming only 7 mW of power and 0.3 mW in its power down mode. It has an internal reference voltage of 4.096V and a full-scale input voltage of 2.048V for the 10-bit resolution. The AD7820KP-REEL is suitable for data acquisition systems, temperature monitoring and control systems, power supply and other power management systems, motor control systems, and industrial communication systems. It works on the principle of successive approximation, comparing the input signal with an internally generated reference and based on the result, adjusting the digital equivalent information.

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