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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|Approx. Price (US$)|
|Part #||Name||Product Family||Comments|
|AFE4400||Integrated Analog Front End for Heart Rate Monitors and Low Cost Pulse Oximeters||ANALOG FRONT END - Medical Analog Front End||AFE4400 is similar to the AFE4490, but has a lower performance spec|
|BQ2026||1.5K-Bit Serial EPROM with SDQ Interface||BATTERY MANAGEMENT PRODUCTS - Battery Monitor, Protection & Authentication Solutions||BQ2026 is used for Authentication of medical cables and accessories|
|AFE4300||Weigh Scale / Body Composition Analog Front End||ANALOG FRONT END - Medical Analog Front End||AFE4300 is AFE for body comp/weigh scales|
|ADS1293||Complete Low Power Integrated Analog Front End for ECG Applications||ANALOG FRONT END - Medical Analog Front End||ADS1293 is AFE for wireless ECG|