Overview
The ADS1294RIZXGT is a highly integrated, 4-channel analog front-end (AFE) IC produced by Texas Instruments. This device is designed for medical applications, particularly for electrocardiogram (ECG) and electroencephalogram (EEG) systems. It features 24-bit delta-sigma analog-to-digital converters (ADCs) with built-in programmable gain amplifiers (PGAs), an internal reference, and an onboard oscillator. The ADS1294RIZXGT is known for its high performance, low power consumption, and compact design, making it ideal for scalable medical instrumentation systems.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Bits | 24 |
| Number of Channels | 4 |
| Power Consumption (per channel) | 0.75 mW |
| Voltage - Supply Analog (AVDD) | 2.7 V ~ 5.25 V |
| Voltage - Supply Digital (DVDD) | 1.65 V ~ 3.6 V |
| Input-Referred Noise | 4 μV (150 Hz BW, G = 6) |
| Input Bias Current | 200 pA |
| Data Rate | 250 SPS to 32 kSPS |
| CMRR | –115 dB |
| Programmable Gain | 1, 2, 3, 4, 6, 8, or 12 |
| Package Type | 64-NFBGA (8x8) |
Key Features
- Eight low-noise PGAs and eight high-resolution ADCs.
- Integrated respiration impedance measurement function.
- Built-in right leg drive amplifier, lead-off detection, Wilson center terminal, pace detection, and test signals.
- Digital pace detection capability.
- Built-in oscillator and reference.
- SPI™-compatible serial interface.
- Flexible input multiplexer per channel for test, temperature, and lead-off detection.
- Supports systems meeting AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 standards.
Applications
The ADS1294RIZXGT is primarily used in medical instrumentation systems, including:
- Electrocardiogram (ECG) systems.
- Electroencephalogram (EEG) systems.
- Respiration impedance measurement systems.
- Pace detection and other cardiac monitoring applications.
- Scalable medical instrumentation systems requiring high integration and low power consumption.
Q & A
- What is the primary application of the ADS1294RIZXGT?
The primary application of the ADS1294RIZXGT is in medical instrumentation systems, particularly for ECG and EEG applications.
- How many channels does the ADS1294RIZXGT have?
The ADS1294RIZXGT has 4 channels.
- What is the resolution of the ADCs in the ADS1294RIZXGT?
The ADCs in the ADS1294RIZXGT have a resolution of 24 bits.
- What is the power consumption per channel of the ADS1294RIZXGT?
The power consumption per channel is 0.75 mW.
- What are the voltage supply ranges for the ADS1294RIZXGT?
The analog supply voltage (AVDD) ranges from 2.7 V to 5.25 V, and the digital supply voltage (DVDD) ranges from 1.65 V to 3.6 V.
- What is the data rate range of the ADS1294RIZXGT?
The data rate range is from 250 SPS to 32 kSPS.
- Does the ADS1294RIZXGT support respiration impedance measurement?
- What standards does the ADS1294RIZXGT comply with?
The ADS1294RIZXGT supports systems meeting AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 standards.
- What is the package type of the ADS1294RIZXGT?
The package type is 64-NFBGA (8x8).
- Does the ADS1294RIZXGT have built-in test signals and lead-off detection?
