AD876JR

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AD876JR is a high temperature grade, low power, 16-bit, serial output, sample and hold, analog-to-digital converter. It is custom designed to provide signal conditioning and data conversion in harsh environments. With its low power consumption and wide operational temperature range, the AD876JR is ideal for use in applications such as medical devices and metering equipment that are exposed to extreme temperatures. The device provides a resolution of ±1 LSB with a linearity of +/- 0.2%.

The AD876JR provides low power consumption and is capable of operating at temperatures up to 105°C. It features a high-speed sample and hold circuit, a high-resolution, low power amplifier, and a 16-bit serial data output. The device incorporates a low power cut of feature which allows the device to operate at a reduced power level while maintaining a constant sample rate and signal resolution. The device also includes an adjustable voltage reference and a programmable gain amplifier (PGA). Additionally, the AD876JR includes a wide variety of programmable features such as auto-calibration, independent fast and slow power down, and temperature monitoring.

The primary application of the AD876JR is in the data acquisition, signal processing and control applications that require an accurate, low power and high temperature grade, analog-to-digital converter. It can be used for automated testing, data acquisition systems, automation, and control applications. The AD876JR can also be used in medical diagnostic/imaging equipment, automotive systems, as well as other applications that require low power and probing accuracy.

The working principle of the AD876JR is that it converts a signal from analog to digital form by applying a sample and hold operation, then performing a successive approximation conversion technique. First, the analog input voltage is sampled by the device’s sample and hold circuit. This sampled voltage is then applied to the comparator and compared with the voltage reference. When the reference voltage is greater than the sample voltage, the output is a logic 0, and when the reference voltage is less than the sample voltage, the output is a logic 1. This comparison is performed 16 times in sequence. At the end of the cycle, the output is a 16-bit binary word that represents the analog input.

The AD876JR provides a programmable gain amplifier (PGA) that allows for a gain of up to 4X. The device also features an adjustable voltage reference, 3.3V, 5V, and external reference. The device offers a high level of noise rejection for improved signal accuracy and reliability. It is available in a small 8-PIN DIP package and can be powered from a single +5V supply.

In conclusion, the AD876JR offers excellent performance in terms of low power consumption, wide operational temperature range and high resolution. The device provides maximum sampling rate of 250ksps and is ideal for data acquisition and signal processing applications that require low power and probing accuracy. It provides a resolution of ±1 LSB with a linearity of +/- 0.2%. The AD876JR also includes programmable features such as auto-calibration, independent fast and slow power down, and temperature monitoring.

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