ADPD107 Photometric Front End with SPI _ BDTIC a Leading Distributor in China

ADPD107 Photometric Front End with SPI

The ADPD105/ADPD107 are highly efficient, photometric front ends, each 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 on the ADPD105 or SPI on the ADPD107. 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 ADPD105/ADPD107 with a low capacitance photodiode of <100 pF for optimal performance. The ADPD105/ ADPD107 can be used with any LED. The ADPD105 is available in a 2.46 mm × 1.4 mm WLCSP. The SPI only version, ADPD107, is available in a 2.46 mm × 1.4 mm WLCSP.

Applications

Wearable health and fitness monitors
Clinical measurements, for example, SpO2
Industrial monitoring
Background light measurements

Features and Benefits

Multifunction photometric front end

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

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

Three 8 mA to 370 mA LED drivers

2 optical inputs

Flexible, multiple, short LED pulses per optical sample

20-bit burst accumulator enabling 20 bits per sample period

On-board sample to sample accumulator, enabling up to 27 bits per data read

Low power operation

SPI, I2C interface and 1.8 V analog/digital core

Flexible sampling frequency ranging from 0.122 Hz to 3820 kHz

FIFO data operation

Optical

Optical Sensors

Data Sheets

Document	note
ADPD105/ADPD107: Photometric Front Ends Data Sheet (Rev. 0)	PDF 1.11 M

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADPD107BCBZ Obsolete	CHIPS W/SOLDER BUMPS/WLCSP	OTH 0	-40 to 85C	0	0	Y
ADPD107BCBZR7 Production	CHIPS W/SOLDER BUMPS/WLCSP	REEL 3000	-40 to 85C	0	2.51	Y

Evaluation Boards

Part Number	Description	Price	RoHS
EVAL-ADPD105Z-GEN	ADPD105 Generic Evaluation board	135	Y

ADPD105/ADPD107: Photometric Front Ends Data Sheet (Rev. 0) adpd105