Overview
The ADS1298RIZXGR from Texas Instruments is part of the ADS129x and ADS129xR family of multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs). These devices are designed with built-in programmable gain amplifiers (PGAs), internal reference, and an onboard oscillator, making them highly integrated and performance-driven for medical instrumentation systems. They are particularly suited for electrocardiogram (ECG) and electroencephalogram (EEG) applications, enabling the development of scalable systems with reduced size, power, and overall cost.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 8 | |
| Resolution | 24-bit | |
| Data Rate | 250 SPS to 32 kSPS | SPS |
| Input-Referred Noise | 4 μV (150 Hz BW, G = 6) | μV |
| Input Bias Current | 200 pA | pA |
| CMRR | –115 dB | dB |
| Programmable Gain | 1, 2, 3, 4, 6, 8, or 12 | |
| Analog Supply Voltage (AVDD) | 2.7 V to 5.25 V | V |
| Digital Supply Voltage (DVDD) | 1.65 V to 3.6 V | V |
| Operating Temperature Range | –40°C to +85°C | °C |
| Package Type | 64-ball BGA (ZXG) |
Key Features
- Eight Low-Noise PGAs and Eight High-Resolution ADCs
- Low Power: 0.75 mW/channel
- Built-In Right Leg Drive Amplifier, Lead-Off Detection, Wilson Center Terminal, Pace Detection, Test Signals
- Integrated Respiration Impedance Measurement (ADS129xR versions)
- 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
- Flexible input multiplexer per channel for test, temperature, and lead-off detection
- Configurable for internal and external clock and reference via jumper settings
Applications
The ADS1298R is primarily used in medical instrumentation systems, particularly for electrocardiogram (ECG) and electroencephalogram (EEG) applications. It is also suitable for other biosensing applications that require high-resolution, low-noise, and low-power conversion. The device's integrated features and scalability make it ideal for developing compact and efficient medical devices.
Q & A
- What is the resolution of the ADS1298R ADC?
The ADS1298R has a 24-bit resolution. - What is the data rate range of the ADS1298R?
The data rate range is from 250 SPS to 32 kSPS. - What is the input-referred noise of the ADS1298R?
The input-referred noise is 4 μV (150 Hz BW, G = 6). - What are the programmable gain options for the ADS1298R?
The programmable gain options are 1, 2, 3, 4, 6, 8, or 12. - What are the operating temperature ranges for the ADS1298R?
The operating temperature range is from –40°C to +85°C. - Does the ADS1298R support both unipolar and bipolar supplies?
Yes, it supports both unipolar and bipolar supplies. - What are some of the integrated features of the ADS1298R?
It includes built-in right leg drive amplifier, lead-off detection, Wilson center terminal, pace detection, test signals, and integrated respiration impedance measurement (for ADS129xR versions). - How does the ADS1298R comply with medical standards?
It supports systems meeting AAMI EC11, EC13, IEC60601-1, IEC60601-2-27, and IEC60601-2-51 Standards. - What type of serial interface does the ADS1298R use?
The ADS1298R uses an SPI™-Compatible Serial Interface. - Can multiple ADS1298R devices be cascaded?
Yes, multiple devices can be cascaded in a daisy-chain configuration for high channel count systems.
