AD7495BRZ-REEL

Analog to digital converters (ADC) are essential components for data acquisition to interpret analog data into digital signals for further manipulation. The AD7495BRZ-REEL is an ADC that is made by Texas Instruments, designed for medium to high resolution words. This type of ADC is ideal for the acquisition and conversion of signals that are coming from low frequency sources and require a high level of accuracy.

AD7495BRZ-REEL focuses on capturing low frequency signals with absolute accuracy. These signals are usually signals from thermocouples, electrochemical cells, and other low frequency signal types. This precision is provided by a high-performance 24-bit delta sigma ADC with no missing codes throughout the full range of the input signals. The AD7495BRZ-REEL is capable of achieving conversions of 0.03 Hz signal bandwidth with signal-to-noise ratios as high as 90 dB. The ADC also includes de-glitching protection and EMI shielding, making it more resistant to noise.

The device is provided in a TSOP package, making it suitable for small form factor applications. It also works with a supply voltage of 2.7V to 5.25V and operates at -40°C to +125°C. It supports a power-down mode and also a sleep mode for system power savings. Its supply current is typically 400µA, enabling greater system power efficiencies. For communication purposes, it supports a 3-wire system and electrical interface.

The working principle of the AD7495BRZ-REEL is based on the delta-sigma architecture. This architecture is based on the idea that low-resolution signals can be converted into high resolution signals by oversampling the signal and then sampling the output. The AD7495BRZ-REEL supports a 32x oversampling ratio. The signal is then passed through a low-pass filter, which removes out of range signals, and the final output is scaled down with a digital-to-analog converter to a resolution of 24 bits.

In summary, the AD7495BRZ-REEL is a 24-bit delta sigma ADC from Texas Instruments designed for medium to high resolution words. It is designed for particularly low frequency signals and is capable of achieving conversions of 0.03 Hz signal bandwidth. It is provided in a small TSOP package and provides low power consumption. It works on the delta-sigma architecture, which uses oversampling and then digitally converts the signal to 24-bit resolution.