Overview
The ADS1299-4PAG is a low-noise, 4-channel, 24-bit analog-to-digital converter (ADC) designed by Texas Instruments for high-resolution biopotential measurements. This device is part of the ADS1299-x family, which includes four-, six-, and eight-channel variants. It is particularly suited for medical instrumentation such as electroencephalogram (EEG) and electrocardiography (ECG) applications. The ADS1299-4PAG integrates a programmable gain amplifier (PGA), an internal reference, and an onboard oscillator, making it a comprehensive solution for scalable medical systems with reduced size, power, and cost.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | |
| Resolution | 24 Bits | |
| Data Rate | 250 SPS to 16 kSPS | |
| Input-Referred Noise | 1 μVPP (70-Hz BW) | |
| Input Bias Current | 300 pA | |
| Common-Mode Rejection Ratio (CMRR) | –110 dB | |
| Programmable Gain | 1, 2, 4, 6, 8, 12, or 24 | |
| Analog Supply Voltage | 4.75 V to 5.25 V | V |
| Digital Supply Voltage | 1.8 V to 3.6 V | V |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Type | TQFP-64 |
Key Features
- Up to four low-noise PGAs and four 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
- Flexible input multiplexer per channel for test, temperature, and lead-off detection
- Optional SRB pins for referential montage configuration
Applications
- Medical instrumentation, including EEG, fetal ECG, sleep study monitors, and bispectral index (BIS) monitors
- Portable ECG recorders and patient monitoring systems
- Industrial control systems and automation equipment
- Aerospace and defense applications requiring high-resolution data acquisition
Q & A
- What is the resolution of the ADS1299-4PAG?
The ADS1299-4PAG has a resolution of 24 bits. - What are the data rate options for the ADS1299-4PAG?
The data rate options range from 250 SPS to 16 kSPS. - What is the input-referred noise of the ADS1299-4PAG?
The input-referred noise is 1 μVPP (70-Hz BW). - What are the programmable gain settings available on the ADS1299-4PAG?
The programmable gain settings are 1, 2, 4, 6, 8, 12, or 24. - What is the operating temperature range of the ADS1299-4PAG?
The operating temperature range is –40°C to +85°C. - What type of package does the ADS1299-4PAG come in?
The ADS1299-4PAG comes in a TQFP-64 package. - Does the ADS1299-4PAG support SPI interface?
Yes, the ADS1299-4PAG supports an SPI-compatible serial interface. - Can multiple ADS1299-4PAG devices be cascaded?
Yes, multiple devices can be cascaded in a daisy-chain configuration for high channel count systems. - What are some common applications of the ADS1299-4PAG?
Common applications include EEG, ECG, portable ECG recorders, patient monitoring systems, and industrial control systems. - Does the ADS1299-4PAG have built-in lead-off detection?
Yes, the ADS1299-4PAG has built-in lead-off detection capabilities.
