RT1025WS

RT1025 Integrated AFE Solution Richtek

Richtek's integrated AFE solutions are designed for heart rate monitoring and measurement

Image of Richtek RT1025 Integrated AFE Solution Richtek's RT1025 is an integrated AFE solution for heart rate monitoring and measurement. The RT1025 integrates low-noise voltage and current detection channels and is capable of simultaneously sensing ECG (electrocardiogram) and PPG (photoplethysmography). With a dynamic range of >100 dB, the RT1025 can accurately sense the pulse by detecting the electrical signal of the heart. The RT1025's high-accuracy voltage and current sense channels are configurable with a sampling rate between 64 kHz and 4 kHz. The RT1025 solution requires only a few discrete components and is easy to use in low power medical ECG/PPG, sports and fitness applications. The RT1025 solution features high integration and high precision voltage and current sensing channels for scalable medical instrumentation systems. The RT1025 is available in a 3.1 mm x 3.4 mm 41-ball 0.4 mm pitch WL-CSP package.

The Daughter Board (DTB) is developed for all RT1025 pins to be pinned out to DIP pins. The daughter board includes the RT1025 and the required 32 kHz Xtal and passive components to quickly evaluate the RT1025's operation and performance. The detailed schematic, hardware and benchmark measurement steps are described in the datasheet. The daughter board is numbered PCB107_V1 and measures 3.3 cm x 3.3 cm.

characteristic

ECG channel function

Supports two-electrode (2E) mode and right leg drive (RLD) mode

Low Noise PGA and High Resolution ADC

Input Impedance: 125 MΩ to 500 MΩ in dual electrode mode, > 1 GΩ in right leg drive mode

Low input-referred noise: 0.67 μVRMS (64 Hz ODR, gain = 12)

Dynamic Range: 110 dB at Gain = 6

CMRR > 85 dB at 60 Hz

Data rate: 64 SPS to 4k SPS

Other features

2-in-1 Biosensing AFE (Voltage/Current)

Built-in heartbeat interval estimation

Integrated oscillator, providing high precision clock and external crystal

Supports I2C and SPI I/F for MCU

On-chip SRAM for data buffering

Ultra low power consumption

Operating temperature range: -20°C to +65°C

Small 3.1 mm x 3.4 mm 41-ball 0.4 mm pitch WL-CSP package

RoHS Compliant and Halogen Free

Daughter board function

Evaluation board number: PCB107_V1

Dimensions: 3.3 cm x 3.3 cm

32 DIP pins

PPG Channel Features

Flexible timing control to support dynamic power down

TX supports H-bridge and push/pull mode

TX LED current range: 10 mA/25 mA/35 mA/50 mA/65 mA/75 mA/90 mA/105 mA, each with 8-bit current resolution

Input Maximum Current Range: 0.5 μA to 50 μA

Input Maximum Capacitance: 1 nF

Input referred noise: 50 pARMS at 5μA input current

CMRR >80 dB at 60 Hz

PGA Gain: 1 V/V to 6V/V

Ambient DAC1/DAC2 range: 1 μA to 6 μA

Digit 24

Number of channels 2

Power (W) 2.18mW

Voltage - Power, Analog 2.66V ~ 2.94V, 3.4V ~ 4.5V

Voltage - Power, Digital 1.62V ~ 3.3V

Package/Enclosure 41-UFBGA, WLCSP

Package 41-WLCSP (3.1x3.48)