ADS8332IRGET

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Data Acquisition – Analog to Digital Converters (ADC) is used for the conversion of analog signals into digital signals for easy transmission across digital networks. ADC devices with integrated sample and hold and other advance features are widely used in many fields, ranging from healthcare to industrial control applications.

The ADS8332IRGET is a highly integrated, 12-bit, 4-channel, synchronous serial ADC. It contains an on-chip track-and-hold circuit, an 8:1 voltage input reference mux, and a 4-channel multiplexer, allowing conversion of up to four single-ended, or two differential signals. It is also optimized for low power consumption, with a wide operating range from 1.65 to 5.5 V. It is widely used in low-power and portable applications.

Application Field

The ADS8332IRGET is mainly used in portable medical, consumer, and industrial applications that require small form factor, low power, and low noise single-ended or differential analog-to-digital conversion. These applications include remote sensors, portable medical devices, consumer electronics, and wireless applications. It also supports a variety of digital interfaces for easy connection, including SPI, I2C, and Serial Peripheral Interface (SPI).

The device also features a 12-bit accuracy and a maximum conversion rate of 60 kSPS, making it suitable for fast and accurate data acquisition. It provides up to four single-ended channels for a variety of input types, including thermocouples, RTDs, strain gages, resistive sensors, and other common analog signals. It also supports two differential channels, which allows measurement of higher performing signals, such as two-wire transducers.

Working Principle

The working principle of the ADS8332IRGET is based on the successive approximation register (SAR) conversion method. The device uses a SAR register in conjunction with an analog comparator and other clock and control logic to convert the analog input into a corresponding digital output. The SAR register is a shift register that is used to compare the analog input to a set of discrete reference voltages.

The device samples the analog input signal with a track-and hold (T/H) circuit, stores the sample in an internal T/H capacitor, and updates the digital result according to the compared voltage level. The comparison process is repeated until the digital result converges to the analog input value. The digital output of the ADC is encoded using MSB (most significant bit) first serial protocol, which is compatible with many microprocessors and digital signal processors (DSPs).

The ADS8332IRGET also provides advanced features, such as differential measurements, temperature compensation, soft-start and single-shot mode, power-down mode, reference voltage, and selection of output data logic level. These features enable the device to deliver high levels of performance, accuracy, and stability for precise and reliable data acquisition.

In summary, the ADS8332IRGET is a low-power, highly integrated ADC that is suitable for a wide range of applications. It is optimized for low-power, portable applications and offers up to four single-ended or two differential analog-to-digital conversions with a maximum conversion rate of 60 kSPS. It also features a 12-bit accuracy and advanced features, such as differential measurements, temperature compensation, and reference voltage selection, which enable precise and reliable data acquisition.

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