Overview
The Texas Instruments ADS1299-6PAGR is a low-noise, 6-channel, 24-bit analog-to-digital converter (ADC) optimized for biopotential measurements. It is part of the ADS1299 family, which includes four-, six-, and eight-channel variants. This device is designed to provide high accuracy and low noise levels, making it ideal for applications such as electrocardiography (ECG), electromyography (EMG), and electrophysiology. The ADS1299-6PAGR integrates all commonly required features for extracranial electroencephalogram (EEG) and ECG applications, enabling the creation of scalable medical instrumentation systems with reduced size, power, and overall cost.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 6 |
| Resolution (Bits) | 24 |
| Input-Referred Noise | 1 µV PP (70-Hz BW) |
| Input Bias Current | 300 pA |
| Data Rate | 250 SPS to 16 kSPS |
| CMRR | –110 dB |
| Programmable Gain | 1, 2, 4, 6, 8, 12, or 24 |
| Analog Supply Voltage | 4.75 V to 5.25 V |
| Digital Supply Voltage | 1.8 V to 3.6 V |
| Package Type | TQFP-64 (10x10 mm) |
| Operating Temperature Range | –40°C to +85°C |
| Interface Type | SPI-Compatible Serial Interface |
| Power Consumption | 15 mW (typical) |
Key Features
- Up to eight low-noise programmable gain amplifiers (PGAs) and eight high-resolution simultaneous-sampling ADCs.
- Built-in bias drive amplifier, lead-off detection, and test signals.
- Built-in oscillator and internal or external reference options.
- Flexible power-down and standby mode.
- Pin-compatible with the ADS129x family.
- SPI-compatible serial interface.
- Optional SRB pins for referential montage configuration.
- Low power consumption of 15 mW (typical).
Applications
- Electrocardiography (ECG): High accuracy and low noise levels make it suitable for ECG measurements.
- Electromyography (EMG): Ideal for EMG signal measurements with high accuracy and low noise levels.
- Electrophysiology: Suitable for measuring electrophysiological signals such as EEG, ECG, and EMG.
- Medical Instrumentation: Includes applications like EEG studies, fetal ECG, sleep study monitors, Bispectral Index (BIS), and Evoked Audio Potential (EAP).
Q & A
- Q: What is the input-referred noise of the ADS1299-6PAGR?
A: The input-referred noise is 1 µV PP with a bandwidth of 70 Hz. - Q: Can the ADS1299-6PAGR be used for ECG measurements?
A: Yes, it can be used for ECG measurements due to its high accuracy and low noise levels. - Q: What is the power consumption of the ADS1299-6PAGR?
A: The power consumption is 15 mW (typical). - Q: Can the ADS1299-6PAGR be used for EMG measurements?
A: Yes, it can be used for EMG measurements due to its high accuracy and low noise levels. - Q: What is the data rate range of the ADS1299-6PAGR?
A: The data rate range is from 250 SPS to 16 kSPS. - Q: What is the common-mode rejection ratio (CMRR) of the ADS1299-6PAGR?
A: The CMRR is –110 dB. - Q: What are the programmable gain options for the ADS1299-6PAGR?
A: The programmable gain options are 1, 2, 4, 6, 8, 12, or 24. - Q: Does the ADS1299-6PAGR have built-in lead-off detection?
A: Yes, it has built-in lead-off detection using an excitation current sink or source. - Q: Can multiple ADS1299-6PAGR devices be cascaded?
A: Yes, multiple devices can be cascaded in a daisy-chain configuration for high channel count systems. - Q: What is the operating temperature range of the ADS1299-6PAGR?
A: The operating temperature range is –40°C to +85°C.
