ADS1294RIZXGR

ADS1294RIZXGR is TI’s four-channel, 24-bit bio-signal front-end (AFE) for EEG/ECG/EMG. It integrates four ΔΣ ADC channels with programmable gains, an on-chip reference and bias drive, lead-off detection, and a right-leg drive, all accessible via a SPI-compatible interface. It supports adjustable data rates and low-noise, low-power operation, ideal for wearable or portable medical sensing.
Key features
- 4-channel, 24-bit delta-sigma ADCs with programmable gain
- Integrated reference, bias drive, lead-off detection, and right-leg drive
- SPI-compatible control interface, programmable data rate
- Low power, suitable for battery-powered devices
Typical applications
- EEG/ECG/EMG biosensing, sleep monitoring, neurophysiology research, compact medical devices
Packaging/grade
- Industrial-grade, RoHS-compliant (lead-free) variant (suffix IZXGR), covering wide-temperature operation
Note: For exact electrical specs, data rates, gains, and package options, consult the TI ADS1294R datasheet.

Key features of ADS1294RIZXGR (biopotential AFE):
- 8 differential input channels with 24-bit delta-sigma ADC
- Per-channel programmable gain amplifiers (PGAs)
- Internal voltage reference and bias drive for EEG/ECG
- Lead-off detection and impedance measurement
- Integrated right-leg drive (RLD) for improved CMRR
- Low-noise front end optimized for biopotentials
- SPI-compatible serial control and data interface
- Programmable data rate and flexible input multiplexing
- On-chip calibration, self-test, and diagnostic features
- Suitable for EEG/ECG and other biomedical measurements
- RoHS-compliant packaging option (IZXGR variant)

Pin count: 28 pins.
Function: 4-channel, 24-bit delta-sigma analog-front-end for biopotentials (EEG/ECG) with integrated programmable-gain amplifiers, bias/lead-off features, and a SPI-compatible control/data interface.

- Manufacturer: Texas Instruments (TI)
- Company type: An American multinational corporation that designs and manufactures semiconductors and integrated circuits, including analog front-end ICs and other embedded processing solutions for various industries.

ADS1294RIZXGR is a 4‑channel, 24‑bit biopotential front‑end with integrated PGAs for low-noise biosignal acquisition. Typical applications include: EEG/ERP and sleep monitoring equipment; ECG/ambulatory long‑term monitoring; EMG and neuromuscular research; portable/wearable medical devices and battery-powered biosignal recorders; neurophysiology research and brain–computer interfaces; multi‑channel biopotential data acquisition for clinical and home healthcare.

ADS1294RIZXGR uses a 28-pin VQFN package (4×4 mm). It is RoHS-compliant (Pb-free).