AFE4460
- Supports signal acquisition of up to 16 phase sets
- Supports up to 32 LEDs, 4 PDs
- Flexible allocation of LEDs, PDs in each phase
- Simultaneous signal acquisition from different sensors at different data rates
- Accurate, continuous PPG monitoring:
- Low current for continuous heart-rate monitoring on a wearable device with a typical value: 15 µA for an LED, 15 µA for the receiver
- Peak system SNR of 115 dB
- Transmitter:
- 8-Bit Programmable LED current with range adjustable from 25 mA to 250 mA
- Mode to fire two LEDs in parallel with independent per-phase current control
- Programmable LED on-time per-phase
- Simultaneous support of 32 LEDs for SpO2, Multi-Wavelength HRM, and Spectroscopy
- Receiver:
- Supports 4 Time-Multiplexed PD Inputs
- 4 parallel receivers (4 sets of TIA/filter)
- Individual ambient offset subtraction DAC at each TIA Input with 8-bit per-phase control and range adjustable up to 255-µA
- Individual LED offset subtraction DAC at each TIA input with 9-bit per-phase control and 64-µA range
- Digital ambient subtraction at ADC output
- Noise filtering with programmable bandwidth
- Transimpedance gain: 3.7 kΩ to 1 MΩ
- Supports external clock or internal oscillator
- Option to acquire data synchronized with a system clock
- Automatic cancellation of DC from Ambient, LED
- FIFO with 256-sample depth
- SPI™ interface/ I2C interface
- 2.6-mm × 2.6-mm DSBGA, 0.4-mm Pitch
- Supplies: Rx:1.7 - 1.9 V (LDO Bypass); 1.9 - 3.6 V (LDO Enabled), Tx: 3-5.5 V, IO: 1.7-RX_SUP
The AFE4460 is an analog front-end for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports up to 32 switching light-emitting diodes (LEDs) and up to four photodiodes (PDs). The AFE has two LED drivers each with 8-bit current control. The device has a high dynamic range transmit-and-receive circuitry that helps with the sensing of very small signal levels. Up to 16 signal phase sets can be defined, each phase set comprising a combination of LED and Ambient phases. Low noise offset DACs at the receiver inputs can be automatically controlled to cancel DC from Ambient and LED light. The current from each of the 4 PDs in each phase is converted into voltage by TIAs, filtered, and then digitized using a common ADC. The ADC code can be stored in a 256-sample FIFO block. The FIFO can be read out using a SPI or I2C interface.
索取更多資訊
在 NDA 下提供完整的產品規格表及其他設計資源。立即索取
您可能會感興趣的類似產品
功能相同，但引腳輸出與所比較的裝置不同
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | AFE4460 Ultra-Small, Integrated AFE for Optical Bio-Sensing datasheet | PDF | HTML | 2022年 6月 21日 |
| Product overview | Photoplethysmography (PPG) With Integrated AFE for Optical Biosensing | PDF | HTML | 2023年 10月 30日 | |
| Certificate | AFE4460EVM EU RoHS Declaration of Conformity (DoC) | 2022年 6月 27日 |
設計與開發
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
AFE4460EVM — 適用於高 SNR、超低功耗、整合式類比前端 (AFE) 的 AFE4460 評估模組
AFE4460 評估模組 (EVM) 是評估 AFE4460 的平台，此為光學生物感測應用領域的類比前端 (AFE)，如心率監控與周邊微血管氧飽和度 (SpO2)。
AFE4460 支援多達 32 個切換發光二極體 (LED) 和多達四個光二極體 (PD)。AFE 配備兩個具 8 位元電流控制功能的 LED 驅動器。本裝置具有高動態範圍傳輸與接收電路，可協助感測極小訊號位準。最多可定義 16 個訊號相位集，每個相位集由 LED 和環境相位組成。接收器輸入的低雜訊偏移數位轉類比轉換器 (DAC) 可自動控制，以抵銷環境與 LED 燈的 DC。每個相位中四個 PD 各自的電流透過轉阻放大器 (...)
AFE4462-DESIGN — AFE4462 design resources
支援產品和硬體
產品
生物感測 AFE
硬體開發
開發板
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YBG) | 36 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。