ADS1248

The ADS1248 from Texas Instruments is a precision, 24-bit analog-to-digital converter (ADC) with a 2-kSPS sample rate. It is designed to reduce system cost and component count for sensor measurement applications.

Key electrical specifications include a 24-bit resolution, a maximum sample rate of 2 kSPS, and 8 independently selectable input channels. The device features a low-noise programmable gain amplifier (PGA) with a noise level of 48 nVRMS at PGA = 128. It supports an SPI-compatible serial interface and operates with analog supply voltages from 2.7 V to 5.25 V and digital supply voltages from 2.7 V to 5.25 V.

Integrated features include dual-matched programmable excitation current sources, a low-drift internal 2.048-V reference with a maximum drift of 10 ppm/°C, sensor burn-out detection, and an internal temperature sensor. The ADS1248 also includes power supply and VREF monitoring capabilities, along with self and system calibration. It offers 4 or 8 general-purpose I/Os.

Packaged in a TSSOP (PW) with dimensions of 9.7 mm x 6.4 mm, the ADS1248 is suitable for applications such as temperature sensor measurements (RTDs, thermocouples, thermistors), pressure measurements, flow meters, and factory automation.