ADS7817UBG4

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The ADS7817UBG4 is a low power CMOS, 8-channel, 12-bit analog-to-digital converter (ADC). It is part of a larger family of Analog Devices (AD) 8-channel, 8/10/12-bit analog-to-digital converters. It is a pin-compatible and functionally-equivalent replacement for other converters in the family and adds some new features. Device operation is fully specified over the temperature range of -40°C to +105°C.

The ADS7817UBG4 is designed for a variety of applications including low power data acquisition and remote data-logging. It has a serial interface, making it easy to connect to most microcontrollers. The input multiplexer features true single-ended input, allowing it to be used with many types of sensors (including thermocouples and resistive sensors). The input channels are DC-coupled, making them suitable for use with both AC and DC signals. The device includes an onboard reference and includes an optional built-in programmable gain amplifiers (PGA) for measuring small signals and adding gain in software.

The ADS7817UBG4 ADC allows for simultaneous sampling of all 8 channels, giving it a high data throughput rate. It features a dual-slope conversion architecture with an internal track-and-hold mechanism. This architecture allows for the ADC to operate with only 8 clock cycles per conversion, allowing for faster conversion rates and lower power consumption. Additionally, this device employs a reset technique that corrects for offset error and reduces non-linearity.

The ADS7817UBG4 also features programmable conversion mode and data rate options. It offers resistance against power spikes, brownout, and noise thereby, increasing system reliability and accuracy. In expanded mode it has 12-bit resolution and a programmable data rate up to 8.25 MSPS. When used in burst mode, up to 16 A/D conversions, in two frames, can be taken without a chip select signal.

To ensure accuracy, the device includes a test bus, which can be used to verify the conversion results as well as to test the internal registers. ADS7817UBG4 also incorporates a diagnostics feature, which can be used to detect any internal device errors. The user can also enable the watchdog to monitor critical components of the system.

Overall, the ADS7817UBG4 is a versatile and reliable 12-bit ADC for applications requiring low power, low noise, and excellent accuracy. It has many features that make it well-suited for a wide range of data acquisition needs. With its numerous features, the ADS7817UBG4 is an excellent choice for applications that require accurate, reliable, low power analog-to-digital conversion.

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