AFE4403
- Fully-Integrated AFE for Pulse Oximeter and Heart Rate Monitoring Applications:
- Transmit:
- Integrated Dual LED Driver (H-Bridge or Common Anode)
- Option for a Third LED Support for Optimized SPO2, HRM, or Multi-Wavelength HRM
- Up to 110-dB Dynamic Range
- LED Current:
- Programmable to 100 mA with 8-Bit Current Resolution
- 30 µA + Average LED Current
- Programmable LED On-Time
- Independent LED2 and LED1 Current Reference
- Receive Channel with High Dynamic Range:
- 22-Bit Output in Twos Complement Format
- Up to 105-dB Dynamic Range
- Low Power: < 650 µA
- Dynamic Power-Down Mode to Reduce Current to 300 µA
- Adaptable to a Very Wide Range of Signal
Amplitudes:
- Total Programmable Gain: 10 kΩ to 4 MΩ
- Integrated Digital Ambient Estimation and Subtraction
- Flexible Clocking by External Clock or Crystal:
- Pulse Frequency: 62.5 SPS to 2000 SPS
- Flexible Pulse sequencing and Timing Control
- Input Clock Range: 4 MHz (Min) to 60 MHz (Max)
- Integrated Fault Diagnostics:
- Photodiode and LED Open and Short Detection
- Supplies:
- Rx = 2.0 V to 3.6 V
- Tx = 3.0 V to 5.25 V
- Package: Compact DSBGA-36 (3.07 mm × 3.07 mm × 0.5 mm)
- Specified Temperature Range: 0°C–20°C to 70°C
The AFE4403 is a fully-integrated analog front-end (AFE) ideally suited for pulse oximeter applications. The device consists of a low-noise receiver channel with an integrated analog-to-digital converter (ADC), an LED transmit section, and diagnostics for sensor and LED fault detection. The device is a very configurable timing controller. This flexibility enables the user to have complete control of the device timing characteristics. To ease clocking requirements and provide a low-jitter clock to the AFE4403, an oscillator is also integrated that functions from an external crystal. The device communicates to an external microcontroller or host processor using an SPI™ interface.
The device is a complete AFE solution packaged in a single, compact DSBGA-36 (3.07 mm × 3.07 mm × 0.5 mm) and is specified over the operating temperature range of –20°C to 70°C.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | AFE4403 Ultra-Small, Integrated Analog Front-End for Heart Rate Monitors and Low-Cost Pulse Oximeters datasheet (Rev. C) | PDF | HTML | 2020/11/18 | ||
| 白皮書 | 持續進化的現代遠距照護應用半導 體技術 | Download English Version | 2020/10/28 | |||
| 技術文章 | Designing compact, efficient and high performing multiparameter patient monitors | PDF | HTML | 2019/6/25 | |||
| 應用說明 | How to Design an SpO2 and OHRM System Using AFE4403 | 2015/3/2 |
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)。
AFE4403EVM — 適用於心率監控器和脈搏血氧儀的 AFE4403 整合式 AFE 評估模組
AFE4403EVM 旨在評估 AFE4403 裝置。完全整合的 AFE 非常適合脈搏血氧儀和心率監測應用，其中包含低雜訊接收通道、LED 發射區段以及感測器和 LED 故障偵測的診斷功能。AFE4403 具備高度可設定的時序控制器，讓使用者能完全控制裝置的時序特性。此裝置亦內建整合式振盪器，可使用兩種時脈來源（外部晶體或來自外部主機處理器的時脈）運作，以減輕時脈需求，並為 AFE4403 提供低抖動時脈。該裝置使用序列週邊設備介面 (SPI) 與外部主機處理器進行通訊。 AFE4403EVM 旨在加速與 AFE4403 裝置相關的評估及系統開發活動。
AFE4403SW-DESIGN — 適用 AFE4403 的 Linux 驅動程式
SLAC713 — AFE4403 Driver Code for CC2640
SLAC677 — AFE4403EVM Firmware Source v2.3
SLAC703 — AFE4403 WristWatch EVM Firmware Source v2.3
SLAC672 — AFE4403EVM GUI v2.2
TIDA-00301 — 最小化光學心律參考設計
此參考設計適用於小型化的光學心率監測量測解決方案（無需胸帶！），專為穿戴式與行動應用所設計。小型模組可輕鬆介接智慧型手機、平板電腦和穿戴式裝置。運用 TI 的 AFE4403 AFE，您可加速及簡化光學 HRM 設計，同時仍能確保嚴苛健身設計所需的量測性能。 此設計的外形尺寸比 TIDA-00011 更小。
TIDA-00311 — 小型化脈搏血氧儀參考設計
此參考設計是專為高階臨床應用設計的最小化脈搏血氧儀。小巧外型模組可輕鬆簡化並加速脈搏血氧儀系統設計。此設計也搭載用於介接 LED 和光二極體感測器的 TI AFE4403 類比前端，其中也包含用於處理 AFE 資訊的 MCU。此設計的外形尺寸比 TIDA-00010 更小。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| DSBGA (YZP) | 36 | Ultra Librarian |
訂購與品質
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。