ADS1293CISQ/NOPB

Analog Front End (AFE) Overview

The ADS1293CISQ/NOPB is a low-power, three-channel analog front end (AFE) designed for biopotential measurements. It integrates three 24-bit sigma-delta analog-to-digital converters (ADCs), an internal reference, and programmable gain amplifiers. The device operates on an analog supply voltage ranging from 2.7 V to 5.5 V and a digital supply voltage from 1.65 V to 3.6 V. It features a serial interface compatible with standard SPI protocols. Key electrical specifications include a maximum power consumption of 900 µW, a sampling rate of up to 25.6 kS/s per channel, and an integral nonlinearity (INL) of 2 ppm. The component is housed in a WQFN-28 package and supports operation within a temperature range of -20 °C to +85 °C.

Analog Front End (AFE) Feature Summary

• Three integrated 24-bit sigma-delta ADCs with differential inputs
• Low power consumption of 900 µW at typical operating conditions
• Internal reference voltage source eliminating external components
• Serial peripheral interface (SPI) compatibility for digital communication

Analog Front End (AFE) Applications

• Electrocardiogram (ECG) systems
• Electromyography (EMG) monitoring devices
• Electroencephalography (EEG) acquisition equipment

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'CISQ' against the manufacturer's official documentation to confirm the exact temperature grade and packaging configuration. Ensure that the digital and analog supply voltages match the system requirements of 1.65–3.6 V and 2.7–5.5 V respectively before integration. Confirm RoHS compliance status through the latest datasheet revision.

Analog Front End (AFE) Selection Notes

Select this component when a compact solution for multi-channel biopotential acquisition is required. The internal reference simplifies board layout compared to external reference designs. Consider the WQFN-28 package dimensions for PCB space constraints. Verify that the 25.6 kS/s maximum sampling rate meets the bandwidth requirements of the target physiological signals.

Analog Front End (AFE) Part Context

This part belongs to the ADS1293 family of analog front ends from Texas Instruments. It is specifically optimized for bio-potential applications requiring high resolution and low noise. The 'NOPB' suffix indicates lead-free construction and absence of certain prohibited substances, aligning with environmental standards.

Analog Front End (AFE) Replacement Considerations

Consult the Texas Instruments product migration guide for verified pin-compatible or functionally equivalent alternatives within the ADS129x series. Cross-reference specifications such as channel count, resolution, and package type to ensure compatibility.