ADPD103BCPZRL

AFE General Purpose 1ADC 14Bit 1.8V 28Pin LFCSP EP T/R

Product Details

The ADPD103 is a highly efficient photometric front end with an integrated 14-bit analog-to-digital converter ADC and a 20-bit burst accumulator that works in concert with flexible light emitting diode LED drivers. It is designed to stimulate an LED and measure the corresponding optical return signal. The data output and functional configuration occur over a 1.8 V I2C interface. The control circuitry includes flexible LED signaling and synchronous detection.

The analog front end AFE features best-in-class rejection of signal offset and corruption due to modulated interference commonly caused by ambient light.

Couple the ADPD103 with a low capacitance photodiode of <100 pF for optimal performance. The ADPD103 can be used with any LED.

**Aplications**

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Body worn health and fitness monitors, for example, heart rate monitoring

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Clinical measurements, for example, SpO2

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Industrial monitoring

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Background light measurements

### Features and Benefits

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Multifunction photometric front end

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Fully integrated AFE, ADC, LED drivers, and timing core

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Usable in a broad range of optical measurement applications, including photoplethysmography

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Enables best-in-class ambient light rejection capability without the need for photodiode optical filters

* Three 8 mA to 250 mA LED drivers

* Separate data registers for each LED//photodiode combination

* 1 to 8 optical inputs

* Flexible, multiple, short LED pulses per optical sample

* 20-bit burst accumulator enabling 20 bits per sample period

* See data sheet for additional features