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- 2017-03-23
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- 王广龙
Description: The AFE4400 is a fully-integrated analog front-end
(AFE) ideally suited for pulse oximeter applications. (H-Bridge, Push, or Pull)
The device consists of a low-noise receiver channel
– Dynamic Range: 95 dB with an integrated analog-to-digital converter (ADC),
– LED Current: an LED transmit section, and diagnostics for sensor
– Programmable to 50 mA with 8-Bit Current and LED fault detection. The device is a very
Resolution configurable timing controller. This flexibility enables
the user to have complete control of the device timing
– Low Power: characteristics. To ease clocking requirements and
– 100 μA+ Average LED Current provide a low-jitter clock to the AFE4400, an oscillator
– Programmable LED On-Time is also integrated that functions an external
crystal. The device communicates to an external
– Independent LED2 and LED1 Current microcontroller or host processor using an SPI™ Reference interface.
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