ADS1292RIPBS

The ADS1292RIPBS from Texas Instruments is a multichannel, simultaneous sampling, 24-bit delta-sigma analog-to-digital converter (ADC) with a built-in programmable gain amplifier (PGA), internal reference, and onboard oscillator. It is designed for low-power medical biopotential measurements such as electrocardiogram (ECG) and respiration monitoring. The device integrates two low-noise PGAs and two high-resolution ADCs, providing a complete front-end solution.

Key specifications include a resolution of 24 bits, a data rate range from 125 SPS to 8 kSPS, and a common-mode rejection ratio (CMRR) of 120 dB. The input-referred noise is 8 µVpp at 150 Hz bandwidth with a gain of 6. The programmable gain can be set to 1, 2, 3, 4, 6, 8, or 12. The analog supply voltage range is 2.7V to 5.25V, and the digital supply range is 1.7V to 3.6V. Power dissipation is typically 335 µW per channel.

The device includes a built-in right leg drive amplifier, lead-off detection, test signals, and for the ADS1292R variant, integrated respiration impedance measurement. It operates over a temperature range of -40°C to 85°C and is available in a 32-TQFP (5x5 mm) surface-mount package. The SPI-compatible serial interface allows easy integration with microcontrollers.