ADS131A04IPBSR – TEXAS INSTRUMENTS

The Texas Instruments ADS131A04IPBSR is a low-power, 24-bit delta-sigma analog-to-digital converter (ADC) in a 4 mm x 4 mm QFN package. It features a single-ended input, operating from a 2.7V to 5.5V supply voltage, drawing a typical current of 650 µA. The device boasts a high input impedance of 10 MΩ, making it suitable for applications with high-source impedance sensors. Its internal oscillator eliminates the need for an external crystal, simplifying design. The ADS131A04IPBSR offers a configurable data rate up to 1000 SPS, with selectable filter settings allowing for noise reduction tailored to the application. Output data is provided via a SPI interface, enabling easy integration with microcontrollers. Its ±10mV input range, while limited, is ideal for precision measurements in low-voltage applications, such as biomedical sensors or strain gauge interfaces where small signal changes are crucial. The device’s low power consumption and high resolution make it advantageous in battery-powered systems requiring long operational life and high accuracy. However, designers should note the limited input voltage range and consider external amplification for larger signals.