ADS1293EVM
Evaluation module for ADS1293 analog front-end development
Manufacturer： ti
series introduction
# Introduction to the ADS1293EVM Product Series
## 1. Overview
The ADS1293EVM is an evaluation module (EVM) that plays a crucial role in the field of medical and bio - signal processing. It is designed to provide engineers, researchers, and developers with a convenient and efficient way to evaluate the performance and capabilities of the ADS1293 integrated circuit. The ADS1293 is a high - performance, low - power, 3 - channel analog - to - digital converter (ADC) specifically tailored for biopotential measurement applications such as electrocardiogram (ECG), electromyogram (EMG), and electroencephalogram (EEG).
## 2. Key Features
### 2.1 High - Performance ADC
- **Resolution and Accuracy**: The ADS1293 within the EVM offers a high - resolution 24 - bit ADC. This high resolution enables the capture of very small biopotential signals with great precision. For example, in ECG measurements, it can accurately detect the subtle electrical changes in the heart's activity, which are often in the microvolt range.
- **Low Noise**: It has extremely low input referred noise, which is essential for capturing clean and reliable biopotential signals. The low noise floor ensures that the measured signals are not corrupted by unwanted electrical interference, allowing for more accurate analysis and diagnosis.
### 2.2 Low - Power Design
- **Battery - Friendly**: The ADS1293EVM is designed with low - power consumption in mind. This makes it ideal for portable and battery - powered medical devices. For instance, in a wearable ECG monitor, the low - power nature of the ADS1293EVM can significantly extend the battery life, providing long - term continuous monitoring without frequent battery replacements.
### 2.3 Multiple Channels
- **Simultaneous Signal Acquisition**: With three channels, the ADS1293EVM can simultaneously measure multiple biopotential signals. This is useful in applications where multiple electrodes are used to capture different aspects of the physiological activity. For example, in a multi - lead ECG system, different channels can be used to record signals from different positions on the chest, providing a more comprehensive view of the heart's electrical activity.
### 2.4 Integrated Features
- **Programmable Gain Amplifier (PGA)**: The EVM includes a PGA that allows for adjustable gain settings. This is beneficial as different biopotential signals have different amplitudes. For example, EEG signals are typically much smaller in amplitude compared to ECG signals. By adjusting the gain of the PGA, the ADS1293EVM can amplify the weak signals to a level that can be accurately digitized by the ADC.
- **Internal Reference**: It has an internal voltage reference, which simplifies the design of the measurement system. The internal reference provides a stable and accurate voltage source for the ADC, eliminating the need for an external reference and reducing the overall complexity of the circuit.
## 3. Hardware Design
### 3.1 Evaluation Board Layout
- **Compact and User - Friendly**: The ADS1293EVM comes with a well - designed evaluation board. The layout is compact, making it easy to handle and integrate into different test setups. It has clearly labeled connectors and components, which simplifies the process of connecting electrodes and other external devices.
- **Signal Conditioning Circuits**: The board includes signal conditioning circuits that are optimized for biopotential measurements. These circuits help to filter out unwanted noise and interference, and also perform functions such as level shifting to ensure that the input signals are within the acceptable range of the ADC.
### 3.2 Connectivity
- **Communication Interfaces**: The EVM supports standard communication interfaces such as SPI (Serial Peripheral Interface). This allows for easy connection to a
Images for reference
ADS1293EVM