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AFE4900 Ultra Low Power 燁弘軒電子優勢供應 AFE4900YZR AFE4900YZT 有現貨 可添加我們聯系方式獲取最優惠價格
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描述
The AFE4900 device is an analog front-end (AFE) for synchronized electrocardiogram (ECG), photoplethysmogram (PPG) signal acquisition. 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 PPG signal chain supports up to four switching light-emitting diodes (LEDs) and up to three photodiodes (PDs). The LEDs can be switched on using a fully integrated LED driver. The current from the photodiode is converted into voltage by the transimpedance amplifier (TIA) and digitized using an analog-to-digital converter (ADC). The ECG signal chain has an instrumentation amplifier (INA) with a programmable gain that interfaces to the same ADC. A right-leg drive (RLD) amplifier set can be used to the bias for the ECG input pins. AC and dc lead-off detect schemes are supported. The ADC codes from the PPG and ECG phases can be stored in a 128-sample first in, first out (FIFO) block and read out using either an I2C or a serial programming interface (SPI) interface.
特性
Synchronized PPG, ECG Signal Acquisition at Data Rates Up to 1 kHz
ECG Signal Chain:
Standalone ECG Acquisition Up to 4 kHz
Input Bias: 1-Lead ECG With RLD Bias
Programmable INA Gain: 2 to 12
Input Noise (1 Hz to 150 Hz): 2.5 μVrms at 1kHz, 1.25 μVrms at 4-kHz Data Rate
AC, DC Lead-Off Detect: 12.5-nA to 100-nA
PPG Receiver:
Supports Three Time-Multiplexed PD Inputs
24-Bit Representation of Current From PD
DC Offset Subtraction DAC (Up to ±126-μA) at TIA Input for Each LED, Ambient
Digital Ambient Subtraction at ADC Output
Noise Filtering With Programmable Bandwidth
Transimpedance Gain: 10 kΩ to 2 MΩ
Dynamic Range Up to 100 dB
Receiver Operates in PPG-Only mode at Approximately 1-μA/Hz Sampling Rate
Power-Down Mode: Approximately 0 μA
PPG Transmitter:
20-mA Setting, 60-μs Pulse Duration,
25-Hz Sampling Rate
Four LEDs in Common Anode Configuration
8-Bit LED Current Up to 200 mA
Mode to Fire Two LEDs in Parallel
Programmable LED On-Time
Simultaneous Support of Three LEDs for SpO2, or Multiwavelength HRM
Average Current of 30 μA Adequate for a
Typical Heart-Rate Monitoring Scenario:
Clocking Using an External or Internal Clock
FIFO With 128-Sample Depth for ECG and PPG
I2C, SPI™Interfaces: Selectable by Pin
Operating Temperature Range: –20°C to +70°C
2.6-mm × 2.1-mm, 0.4-mm Pitch DSBGA Package
Supplies:
Rx: 1.8 V to 1.9 V (LDO Bypass),
2.0 V to 3.6 V (LDO Enabled)
Tx: 3 V to 5.25 V
IO: 1.7 V to Rx_SUP
深圳市燁弘軒電子有限公司，我司2011年成立于中國經濟特區深圳.我司專注于為全球電子企業提供優質的電子零件供應服務，竭力打造全球品牌元器件零售與批量供應中心。專業經營各類電子元器件（集成電路IC，存儲芯片，分立器件,電源,無源元件,連接器,繼電器,傳感器,光電子,開關,保險元件,緊固件,開發工具,變壓器,測試與測量等）。 我們以低成本提供全方位一站式電子元件供應鏈采購方案，包括但不僅限于電子元件緊急物料搜尋，電子元件齊套供應、電子元件降低成本的長期供應，庫存寄售等一系列供應鏈解決方案。優勢供應各類電子組件.
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深圳市燁弘軒電子有限公司 重點客戶遍布中國內地 港 澳 臺地區，另外歐美發達國家以及 一代一路沿線發展中國家我司也有大量長期合作的優質客戶。
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深圳市燁弘軒電子有限公司 為一般納稅人 可開具17%增值稅票 有合作基礎可申請月結，延長賬期等多種供貨付款方式。
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阿里旺旺：cd_prety
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銷售經理：朱宜華 深圳市燁弘軒電子有限公司 深圳市福田區上步工業區204棟5樓東座516室
電話: 0755-82548684 多線
傳真: 0755-82523504
手機: 13410068358
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