AFE4405

Name: AFE4405
Brand: TI
SKU: AFE4405
Price: 1.2 USD

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Ultrakleiner integrierter AFE mit FIFO für die optische Herzfrequenzüberwachung und Biosensorik

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Datenblatt

document-pdfAcrobat AFE4405 Ultra-Small, Integrated AFE with FIFO for Wearable, Optical Heart-Rate Monitoring and Bio-Sensing datasheet (Rev. C) (Englisch) PDF | HTML

AFE4405

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Datenblatt

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Produktdetails

Applications

Optical-HRM

Number of input channels

2

Resolution (Bits)

24

Number of LEDs

3

Interface type

I2C, SPI

Operating temperature range (°C)

-20 to 70

Rating

Catalog

Applications

Optical-HRM

Number of input channels

2

Resolution (Bits)

24

Number of LEDs

3

Interface type

I2C, SPI

Operating temperature range (°C)

-20 to 70

Rating

Catalog

DSBGA (YZ)

30

4.8 mm² 2.4 x 2

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
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

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
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

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

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	Typ	Titel		Datum
*	Data sheet	AFE4405 Ultra-Small, Integrated AFE with FIFO for Wearable, Optical Heart-Rate Monitoring and Bio-Sensing datasheet (Rev. C)	PDF \| HTML	31 Jul 2019

AFE4405

Ultrakleiner integrierter AFE mit FIFO für die optische Herzfrequenzüberwachung und Biosensorik

AFE4405

Produktdetails

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