ADS1294 具有集成 ECG 前端的 4 通道 24 位模数转换器
ADS1294 说明
The ADS1294/6/8 are a family of multichannel, simultaneous sampling, 24-bit, delta-sigma (
) analog-to-digital converters (ADCs) with a built-in programmable gain amplifier (PGA), internal reference, and an onboard oscillator. The ADS1294/6/8 incorporate all of the features that are commonly required in medical electrocardiogram (ECG) and electroencephalogram (EEG) applications.
With its high levels of integration and exceptional performance, the ADS1294/6/8 family enables the creation of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.
The ADS1294/6/8 have a flexible input multiplexer per channel that can be independently connected to the internally-generated signals for test, temperature, and lead-off detection.
| ADS1194 | ADS1196 | ADS1198 | ADS1294 | ADS1296 | ADS1298 | |
| ADC Resolution(Bits) | 16 | 16 | 16 | 24 | 24 | 24 |
| ADC: Sampling Rate(Max)(KSPS) | 32 | 32 | 32 | 32 | 32 | 32 |
| # Input Channels | 4 | 6 | 8 | 4 | 6 | 8 |
| Input-referred Noise(Typ)(uVpp) | 12.5 | 12.5 | 12.5 | 4 | 4 | 4 |
| PGA Gain(Typ)(V/V) | 1,2,3,4,6,8,12 | 1,2,3,4,6,8,12 | 1,2,3,4,6,8,12 | 1,2,3,4,6,8,12 | 1,2,3,4,6,8,12 | 1,2,3,4,6,8,12 |
| IAVDD Supply Current(Typ)(mA) | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 |
| IDVDD Supply Current(Typ)(mA) | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 | 0.5 |
| Power/Channel(Typ)(mW) | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 | 0.75 |
| Reference Mode | Int/Ext | Int/Ext | Int/Ext | Int/Ext | Int/Ext | Int/Ext |
| INL(Typ)(ppm) | 20 | 20 | 20 | 20 | 20 | 20 |
| Offset Error(Typ)(uV) | 500 | 500 | 500 | 500 | 500 | 500 |
| Offset error drift(Typ)(uV/C) | 2 | 2 | 2 | 2 | 2 | 2 |
| Gain Error(Typ)(%) | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Gain Drift(Typ)(ppm/degC) | 5 | 5 | 5 | 5 | 5 | 5 |
| SNR(Typ)(dB) | 97 | 97 | 97 | 118 | 118 | 118 |
| THD(Typ)(dB) | -95 | -95 | -95 | -98 | -98 | -98 |
| Analog Voltage AV/DD(Min)(V) | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 | 2.7 |
| Analog Voltage AV/DD(Max)(V) | 5.25 | 5.25 | 5.25 | 5.25 | 5.25 | 5.25 |
| Logic Voltage DV/DD(Min)(V) | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 | 1.65 |
| Logic Voltage DV/DD(Max)(V) | 3.6 | 3.6 | 3.6 | 3.6 | 3.6 | 3.6 |
| Rating | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
| Pin/Package | 64NFBGA, 64TQFP | 64NFBGA, 64TQFP | 64NFBGA, 64TQFP | 64NFBGA, 64TQFP | 64NFBGA, 64TQFP | 64NFBGA, 64TQFP |
ADS1294 特性
- Eight Low-Noise PGAs and Eight High-Resolution ADCs (ADS1298)
- Low Power: 0.75mW/channel
- Input-Referred Noise: 5uVPP (150Hz BW, G = 6)
- Input Bias Current: 200pA
- Data Rate: 250SPS to 32kSPS
- CMRR: –110dB
- Programmable Gain: 1, 2, 3, 4, 6, 8, or 12
- Supplies: Unipolar or Bipolar
- Analog: 2.7V to 5.25V
- Digital: 1.65V to 3.6V
- Built-In Right Leg Drive Amplifier, Lead-Off Detection, WCT, Test Signals
- Pace Detection
- Digital Pace Detection Capability
- Built-In Oscillator and Reference
- Flexible Power-Down, Standby Mode
- SPITM-Compatible Serial Interface
- Operating Temperature Range: 0°C to +70°C (–40°C to +85°C grade available soon)
- APPLICATIONS
- Medical Instrumentation (ECG and EEG) including:
- Patient monitoring; Holter, event, stress, and vital signs ECG, AED, telemedicine, fetal ECG
- Medical Instrumentation (ECG and EEG) including:
ADS1294 芯片订购指南
| 器件 | 状态 | 温度 (oC) | 封装 | 引脚 | 丝印标记 |
| ADS1294CZXGR | PREVIEW | 0 to 70 | NFBGA (ZXG) | 64 | |
| ADS1294CZXGT | PREVIEW | 0 to 70 | NFBGA (ZXG) | 64 | |
| ADS1294IPAG | PREVIEW | -40 to 85 | TQFP (PAG) | 64 | |
| ADS1294IPAGR | PREVIEW | -40 to 85 | TQFP (PAG) | 64 |
ADS1294 应用技术支持与电子电路设计开发资源下载
- ADS1294 数据资料 dataSheet 下载.PDF
- TI 德州仪器ECG/EEG 模拟前端产品选型与价格参考 . xls
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
- 触摸屏系统中的校准 (PDF 393 KB)
- Using a touch-screen controller’s auxiliary inputs (PDF 149 KB)
- Q4 2007 Issue Analog Applications Journal (PDF 325 KB)
- Reducing Analog Input Noise in Touch Screen Systems (PDF 535 KB)
- Operation Schemes of Touch Screen Controllers (PDF 846 KB)
- Apply TI TSC for Various and Multiple Functions (PDF 316 KB)
- How to Use TI's 4-Wire TSC to Control an 8-Wire Resistive Touch Screen (PDF 271 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF 1305 KB)
- Analog-to-Digital Converter Grounding Practices Affect System Performance (PDF 56 KB)
- Principles of Data Acquisition and Conversion (PDF 50 KB)
- Interleaving Analog-to-Digital Converters (PDF 64 KB)
- What Designers Should Know About Data Converter Drift (PDF 95 KB)
- Touch Screen Controller Tips (PDF 86 KB)
- Giving Delta-Sigma Converters a Gain Boost with a Front End Analog Gain Stage (PDF 70 KB)
- Programming Tricks for Higher Conversion Speeds Utilizing Delta Sigma Converters (PDF 105 KB)