AFE4950
- Supports simultaneous and synchronized acquisition of up to 24 PPG and a single-lead ECG signal.
- Flexible allocation of 8 LED, 4 PD in each phase
- ECG signal chain:
- 1-lead ECG signal acquisition up to 2 kHz
- RLD output to drive a third electrode
- Input noise : 0.7 µV-rms
- Supports up to ±0.65 V differential DC offset and +/-0.55 V common mode range
- Programmable INA gain: 11, 21
- High-pass filter with quick saturation recovery
- Integrated 300 Hz anti-aliasing low pass filter
- AC, DC lead-off detect: 2.9 nA to 92.5 nA
- Low power continuous lead-on detection
- Impedance signal chain
- Continuous low-power monitoring of impedance between 2 electrodes
- 7 MΩ range
- 300 Ω noise on 620 kΩ
- PPG Transmitter:
- 8-Bit Programmable LED Current with range adjustable from 25 mA to 250 mA
- Mode to fire two LEDs in parallel
- Support of 8 LEDs in Common Anode configuration for SpO2, Multi-Wavelength HRM
- PPG Receiver:
- 2 parallel receivers (two sets of TIA/ filter)
- Supports 4 Time-Multiplexed Photodiode Inputs to each Receiver
- 8-bit Ambient Offset subtraction at each TIA input with 256 µA range
- 8-bit LED Offset Subtraction DAC with 64 µA range
- Automatic ambient cancellation and dynamic LED DC cancellation at TIA input
- Ambient rejection close to 100 dB up to 10 Hz
- Noise filtering with programmable bandwidth
- Trans-impedance Gain: 3.7 kΩ to 1 MΩ
- Accurate, Continuous Heart-Rate Monitoring:
- System SNR up to 109-dB at 16 µA PD current
- Low Current for Continuous Operation on a Wearable Device with a Typical Value: 15-µA for an LED, 20-µA for the Receiver
- External clock and internal oscillator modes
- Acquire data synchronized with system master clock
- FIFO with 256-sample Depth
- SPI, I2C interfaces: Selectable by pin
- 2.6-mm × 2.5-mm DSBGA, 0.4-mm Pitch
- Supplies: Rx:1.7-1.9V (LDO Bypass); 1.9-3.6V (LDO Enabled), Tx:3-5.5V, IO:1.7-RX_SUP
The AFE4950 device is an analog front-end (AFE) for synchronized signal acquisition of PPG and ECG signals. The device can also be used for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The ECG signal chain supports 2- and 3-electrode configurations and has an integrated Right leg drive (RLD) buffer. The ECG signal chain can also be used to do a continuous, low-power monitoring of the impedance between pair of electrodes.
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檢視所有 8 | 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | AFE4950 Ultra-Small, Integrated AFE for Wearable Optical Heart-Rate Monitoring, SpO2 and Electrical Bio-sensing datasheet (Rev. B) | PDF | HTML | 2021年 7月 15日 |
| Product overview | ECG and Cuffless Blood Pressure Monitoring With Integrated AFE | PDF | HTML | 2023年 10月 30日 | |
| Product overview | Photoplethysmography (PPG) With Integrated AFE for Optical Biosensing | PDF | HTML | 2023年 10月 30日 | |
| Application brief | ECG Signal Acquisition on Wearables | PDF | HTML | 2022年 11月 15日 | |
| Application brief | Measuring Oxygen Saturation (SpO2) on Wearables | PDF | HTML | 2022年 11月 14日 | |
| Application brief | Optical Heart Rate Monitoring (OHRM) on Wearables | PDF | HTML | 2022年 11月 14日 | |
| Application brief | Cuffless Blood Pressure Monitoring on Wearables | PDF | HTML | 2022年 11月 9日 | |
| Technical article | Solving 5 challenges of ECG signal acquisition in wearables | PDF | HTML | 2021年 7月 21日 |
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開發板
AFE4950EVM — 適用於穿戴式光學心率監控之超小型整合式 AFE 的 AFE4950 評估模組
The AFE4950 evaluation module (EVM) is designed to expedite evaluation and system-development activities related to the AFE4950 product. AFE4950 is an analog front end (AFE) for synchronized signal acquisition of PPG and ECG signals. AFE4950 can also be used for optical biosensing applications, (...)
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BSECUR-3P-ALGORITHMS — B SECUR ECG 演算法和電極設計服務
HeartKey is a powerful and accurate set of ECG algorithms, ready for integration into the next generation low power low memory consumer / IoT & medical devices such as smartwatches, smart clothing, medical, automotive, smart home devices and hand-held devices. HeartKey is comprised of advanced (...)
從：B Secur
模擬工具
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YBG) | 36 | Ultra Librarian |
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