See datasheet for actual packaging/pinout drawings

Packaging

Package | PIN:

RHA | 40

Temp:

I (-40 to 85)

ECO Plan:

Green (RoHS & no Sb/Br)

AFE4490RHAT


Integrated Analog Front End (AFE) for Pulse Oximeters

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Texas Instruments AFE4490RHAT

The AFE4490 is a fully-integrated analog front-end (AFE) that is ideally suited for pulse-oximeter applications. The device consists of a low-noise receiver channel with a 22-bit 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 device, 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 VQFN-40 package (6 mm × 6 mm) and is specified over the operating temperature range of –40°C to 85°C.

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