ADS1293CISQE/NOPB

Analog Front End (AFE) Overview

The ADS1293CISQE/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 supports sampling rates up to 25.6 kS/s per channel with a maximum power consumption of 900 µW. It 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. Communication is handled via a standard 4-wire serial interface compatible with SPI. The component is housed in a WQFN-28 package and functions 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
• Supports data rates up to 25.6 kS/s per channel

Analog Front End (AFE) Applications

• Electrocardiogram (ECG) systems
• Electroencephalogram (EEG) monitoring devices
• Portable medical instrumentation
• Biomedical sensor interfaces

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'CISQE' against the manufacturer's official datasheet to confirm pinout compatibility and electrical specifications. Ensure that the required operating temperature range aligns with the -20°C to +85°C specification provided for this variant. Cross-reference the RoHS compliance status with current regulatory requirements before finalizing procurement decisions.

Analog Front End (AFE) Selection Notes

Select this component when designing systems requiring high-resolution biopotential acquisition with strict power constraints. The integrated nature of the AFE reduces external component count compared to discrete amplifier and ADC solutions. Verify that the system's microcontroller supports the necessary 4-wire SPI interface timing and voltage levels for reliable communication with the device.

Analog Front End (AFE) Part Context

This part belongs to the ADS1293 family of analog front ends from Texas Instruments. The 'NOPB' suffix indicates lead-free packaging compliant with RoHS standards. The 'CISQE' designation specifies the commercial temperature grade and the WQFN-28 package type. This family is optimized for applications where size, power, and signal integrity are critical factors in biopotential signal conditioning.

Analog Front End (AFE) Replacement Considerations

Consult the official TI product selection guide for direct replacements or pin-compatible alternatives within the ADS129x series. Verify that any substitute component maintains the same 24-bit resolution and 3-channel configuration to ensure circuit board compatibility without redesign.