HX3695 is an ultra-low power integrated AFE for Wearable, Optical, Heart-Rate Monitor and Bio sensor with I2C/SPI interface. HX3695 include transmitter and receiver two parts. The receiver have four PPG input channels ,±172uA offset IDAC and a high resolution ADC. The transmitter has eight fully integrated LED drivers with 8-bit current control. The device has a high dynamic range transmit and receive circuitry that helps with the sensing of very small signal.
1.Ultra-low power ,4 PD input, 8 LED drives Biological sign monitoring analog AFE.
2.The dynamic range of the optical signal path is up to 110dB, which can accurately process small signals.
3.Support 8-phase data conversion each time, each phase PD input is dynamically selectable, and LED emission is dynamically selectable.
4.Ultra-low power : @FS=25Hz，LED(32uS)25mA:LED20uA,Receiver 25uA.
5.Transmitter: 8 LED drivers (internal 2 independent LED driver cores), supporting a maximum 200mA 8-bit programmable LED drive current; When the configurable LED is lit Receiving Support 2-way or multiplex PD input, built-in accuracy ADC 8uA. 8BITS configurable ALS elimination IDAC± 64uA, 8bits configurable DC elimination IDAC each phase.
6.FIFO depth is 256 PPG data, which is applicable to the algorithm scheme of power consumption optimization.
1.Voltage: TX_SUP =3.3 V~5.25V VDDA =2.7 V~3.6 V IO_SUP = 1.8 V~VDDA
2.Communication interface: IIC/SPI
3.Temperature range: -20℃~85℃
4.Superiority: Ultra High Performance，High end dynamic HRM ,SPO2 and HRV
5.Compact Size: Package1：WLCSP25 2.1*2.1*0.5mm
Package2：WLCSP42 2.93*2.63*0.55mm
Headquarter：9/F, Building 5, No 150 Pubin Road, PuKou District, Nanjing,China
Shanghai office：203, Building 5, Lane 88, Shengrong Road, Pudong New Area, Shanghai,China
Shenzhen office：13D, Anhongji Tianyao Square, the intersection of Zhongmei Road and Xinqu Avenue, Minzhi Street, Longhua District, Shenzhen,China
