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General Description

The RT1025 is an integrated AFE solution for Heart-Rate monitoring and measurements. The RT1025 integrates low noise voltage and current sensing channels and is capable of sensing ECG (Electrocardiography) and PPG (Photoplethysmography) simultaneously. The RT1025 have > 100dB dynamic range and can sense pulses accurately by detecting the heart’s electric signals. The sampling rates of the high-precision voltage and current sensing channels in the RT1025 are configurable between 64 to 4kHz. The RT1025 solution need only few discrete components and is easy to use for low-power medical ECG/PPG, sports, and fitness applications. With high levels of integration and high-precision voltage and current sensing channels, the RT1025 solution is suitable for scalable medical instrumentation systems.

The RT1025 is available in a 3.1mm x 3.4mm, 41-Ball, 0.4mm pitch, WL-CSP package.

Features

? ECG Channel Feature

?Supports Two-Electrode (2E) Mode and RightLeg Drive (RLD) Mode

?Low Noise PGA and High Resolution ADC

?Input Impedance : 125M to 500MΩ atTwo-Electrode Mode and > 1GΩ at Right LegDrive Mode

?Low Input-Referred Noise : 0.67μVrms (64HzODR, Gain = 12)

?Dynamic Range : 110dB at Gain = 6

?CMRR > 85dB at 60Hz

?Data rate : 64SPS to 4k SPS

? PPG Channel Feature

?Flexible Timing Control and Support DynamicPower Down

?TX Supports H-bridge and Push/Pull Mode

?TX LED Current Range : 10 / 25 / 35 / 50 / 65 / 75/ 90 / 105mA, Each with 8-bit CurrentResolution

?Input Maximum Current Range : 0.5 to 50μA

?Input Maximum Capacitance : 1nF

?Input-Referred Noise : 50pArms at 5μA InputCurrent

?CMRR > 80dB at 60Hz

?PGA Gain : 1 to 6V/V

?Ambient DAC1/DAC2 Range : 1 to 6μA

? Others

?2-in-1 Bio-Sensing AFE (Voltage/Current)

?Built-In Heartbeat Interval Estimation

?Integrates an Oscillator to offer High-PrecisionClock with External Crystal

?Support 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 3.1mm x 3.4mm, 41-Ball, 0.4mm Pitch,and WL-CSP Package

?RoHS Compliant and Halogen Free

Applications

? Medical Instrumentation (ECG) including :

? Heart Rate, Respiration, and Single-Lead ECG

? Medical Instrumentation (PPG) including :

? Optical Heart-Rate Monitoring (HRM)

? Heart-Rate Variability (HRV)

? Pulse Oximetry (SpO2 Measurement)

? VO2 Max

? Sports and Fitness Wearable Devices

? High-Precision, Simultaneous, Multichannel Signal Acquisition