ADPD1080WBCPZR7

ADPD1080WBCPZR7 FEATURES

Multifunction photometric front endFully integrated AFE, ADC, LED drivers, and timing coreEnables ambient light rejection capability without the needfor photodiode optical filtersThree 370 mA LED peak current driversFlexible, multiple, short LED pulses per optical sample20-bit burst accumulator enabling 20 bits per sample periodOn-board sample to sample accumulator, enabling up to27 bits per data readLow power operationSPI, I2C interface, and 1.8 V analog/digital coreFlexible sampling frequency ranging from 0.122 Hz to 2700 HzFIFO data operationQualified for automotive applications

ADPD1080WBCPZR7 GENERAL DESCRIPTION

The ADPD1080/ADPD1081 are highly efficient, photometricfront ends, each with an integrated 14-bit analog-to-digitalconverter (ADC) and a 20-bit burst accumulator that workswith flexible light emitting diode (LED) drivers. The ADPD1080/ADPD1081 stimulate an LED and measures the correspondingoptical return signal. The data output and functional configurationoccur over a 1.8 V I2C interface on the ADPD1080 or a serialport interface (SPI) on the ADPD1081. The control circuitryincludes flexible LED signaling and synchronous detection.The analog front end (AFE) features rejection of signal offset andcorruption due to modulated interference commonly caused byambient light without the need for optical filters or dc cancellationcircuitry that requires external control.Couple the ADPD1080/ADPD1081 with a low capacitancephotodiode of <100 pF for optimal performance. The ADPD1080/ADPD1081 can be used with any LED. The ADPD1080 is availablein a 16-ball, 2.46 mm × 1.4 mm WLCSP and a 28-lead, 4 mm ×4 mm LFCSP. The SPI only version, ADPD1081, is available ina 17-ball, 2.46 mm × 1.4 mm WLCSP.

ADPD1080WBCPZR7 APPLICATIONS

Wearable health and fitness monitorsClinical measurements, for example, SpO2Industrial monitoringBackground light measurements