Overview
The ADS1294RIZXGR, produced by Texas Instruments, is a member of the ADS129xR family of multichannel, simultaneous sampling, 24-bit delta-sigma (ΔΣ) analog-to-digital converters (ADCs). This device is designed for high-performance medical instrumentation, particularly for electrocardiogram (ECG) and electroencephalogram (EEG) applications. It features built-in programmable gain amplifiers (PGAs), an internal reference, and an onboard oscillator, making it ideal for developing scalable and cost-effective medical systems.
Key Specifications
| Parameter | Value |
|---|---|
| Data Resolution | 24-bit |
| Number of Channels | 4 (ADS1294R) |
| Data Rate | 250 SPS to 32 kSPS |
| Input-Referred Noise | 4 μV PP (150 Hz BW, G = 6) |
| Input Bias Current | 200 pA |
| CMRR | –115 dB |
| Programmable Gain | 1, 2, 3, 4, 6, 8, or 12 |
| Power Consumption | 0.75 mW/channel |
| Supply Voltage | AVDD = 2.7 V to 5.25 V, DVDD = 1.65 V to 3.6 V |
| Operating Temperature Range | –40°C to +85°C |
| Package Type | NFBGA (ZXG) with 64 pins |
Key Features
- Eight low-noise PGAs and eight high-resolution ADCs
- Low power consumption: 0.75 mW/channel
- Built-in right leg drive amplifier, lead-off detection, Wilson center terminal, pace detection, and test signals
- Integrated respiration impedance measurement
- Digital pace detection capability
- Built-in oscillator and reference
- SPI™-compatible serial interface
- Supports systems meeting AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 standards
Applications
- Medical Instrumentation: ECG, EMG, EEG, patient monitoring, Holter, event, stress, and vital signs including ECG, AED, telemedicine
- Bispectral index (BIS), Evoked audio potential (EAP), Sleep study monitor
- High-precision, simultaneous, multichannel signal acquisition
Q & A
- What is the primary application of the ADS1294RIZXGR? The primary application is in medical instrumentation, particularly for ECG and EEG systems.
- How many channels does the ADS1294RIZXGR have? The ADS1294RIZXGR has 4 channels.
- What is the data resolution of the ADS1294RIZXGR? The data resolution is 24-bit.
- What are the supported data rates for the ADS1294RIZXGR? The supported data rates range from 250 SPS to 32 kSPS.
- What is the input-referred noise of the ADS1294RIZXGR? The input-referred noise is 4 μV PP (150 Hz BW, G = 6).
- Does the ADS1294RIZXGR support integrated respiration impedance measurement? Yes, it includes a fully integrated respiration impedance measurement function.
- What are the power supply requirements for the ADS1294RIZXGR? The device requires AVDD = 2.7 V to 5.25 V and DVDD = 1.65 V to 3.6 V.
- What is the operating temperature range of the ADS1294RIZXGR? The operating temperature range is –40°C to +85°C.
- Can multiple ADS1294RIZXGR devices be cascaded? Yes, multiple devices can be cascaded in a daisy-chain configuration for high channel count systems.
- What standards does the ADS1294RIZXGR support? It supports systems meeting AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 standards.
