AFE4405
- Transmitter:
- Supports Common Anode LED Configuration
- Dynamic Range: 100 dB
- 8-Bit Programmable LED Current to 50 mA (Extendable to 100 mA)
- Programmable LED On-Time
- Simultaneous Support of 3 LEDs for Optimized SpO2, HRM, or Multi-Wavelength HRM
- Receiver:
- Supports 2 Time-Multiplexed Photodiode Inputs
- 24-Bit Representation of the Current Input from the Photodiode in Twos Complement Format
- Individual DC Offset Subtraction DAC
(±15.75-µA Range) at TIA Input for Each LED, Ambient - Digital Ambient Subtraction at ADC Output
- Transimpedance Gain: 10 kΩ to 2 MΩ
- Dynamic Range: 100 dB
- Dynamic Power-Saving Mode to Reduce Receiver Current to 200 µA
- Pulse Frequency: 5 SPS to 1000 SPS
- Flexible Pulse Sequencing and Timing Control
- Flexible Clock Options:
- External Clocking:
4-MHz to 60-MHz Input Clock - Internal Clocking: 4-MHz Oscillator
- External Clocking:
- FIFO with 240 Sample Depth:
- Programmable Partitioning Across Phases
- I2C, SPI Interfaces: Selectable by Pin
- Operating Temperature Range: –20°C to +70°C
- 2.6-mm × 2.1-mm DSBGA, 0.4-mm Pitch
- Supplies: Rx: 2 V to 3.6 V, Tx: 3 V to 5.25 V,
IO: 1.8 V to 3.6 V
The AFE4405 is an analog front-end (AFE) for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports three switching light-emitting diodes (LEDs) and up to two photodiodes. The current from the photodiode is converted into voltage by the transimpedance amplifier (TIA) and digitized using an analog-to-digital converter (ADC). The ADC code can be stored in a 240-sample first in, first out (FIFO) block with programmable depth. The FIFO depth can be partitioned to accommodate the phases that must be stored. The FIFO can be read out using either an I2C or a SPI interface. The AFE also has a fully-integrated LED driver with an 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.
To request a full data sheet or other design resources: request AFE4405
更多資訊
在 NDA 下提供完整資料表及其他設計資源。立即索取
您可能會感興趣的類似產品
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | AFE4405 Ultra-Small, Integrated AFE with FIFO for Wearable, Optical Heart-Rate Monitoring and Bio-Sensing datasheet (Rev. C) | PDF | HTML | 2019年 7月 31日 |
| EVM User's guide | AFE4405EVM Introduction User's Guide | 2016年 4月 13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)。
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
The AFE4403EVM is intended for evaluating the AFE4403 device. The fully integrated AFE is ideally suited for Pulse Oximeter and Heart rate monitoring applications and consists of low noise receive channel, the LED transmit section and diagnostics for sensor and LED fault detection. The AFE4403 has (...)
AFE4405EVM — 具有 FIFO 且適用於穿戴式光學心率監測的 AFE4405 整合式 AFE 評估模組
The AFE4405 is an analog front-end (AFE) for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The device supports three switching light-emitting diodes (LEDs) and a single photodiode. The current from the photodiode is (...)
AFE4490SPO2EVM — 適用於脈搏血氧儀的 AFE4490 整合式類比前端 (AFE) 評估模組
The AFE44x0SPO2EVM is intended for evaluating AFE4400 and AFE4490 devices. The family of devices are fully integrated AFE ideally suited for Pulse Oximeter applications and consist of low noise receive channel, the LED transmit section and diagnostics for sensor and LED fault detection. The (...)
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
| 封裝 | 引腳 | 下載 |
|---|---|---|
| DSBGA (YZ) | 30 | 檢視選項 |
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
- 資格摘要
- 進行中可靠性監測
- 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。