Low-Power, Integrated ECG/PPG AFE for Heart-Rate Monitoring and Measurements


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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


  • 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
  • Internet of Things
Key Spec.
Status NRND
Controller No
Package Type WL-CSP3.10x3.48-41
  • ECG Channel Feature
    ► Supports Two-Electrode (2E) Mode and Right Leg Drive (RLD) Mode
    ► Low Noise PGA and High Resolution ADC
    ► Input Impedance : 125M to 500MΩ at Two-Electrode Mode and > 1GΩ at Right Leg Drive Mode
    ► Low Input-Referred Noise : 0.67μVrms (64Hz ODR, 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 Dynamic Power Down
    ► TX Supports H-bridge and Push/Pull Mode
    ► Thermal Shutdown Protection
    ► TX LED Current Range : 10 / 25 / 35 / 50 / 65 / 75 / 90 / 105mA, Each with 8-bit Current Resolution
    ► Input Maximum Current Range : 0.5 to 50μA
    ► Input Maximum Capacitance : 1nF
    ► Input-Referred Noise : 50pArms at 5μA Input Current
    ► 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-Precision Clock 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
TitleLast UpdateShareDownload
Low-Power, Integrated ECG/PPG AFE for Heart-Rate Monitoring and Measurements2018/07/04
Technical Documents
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Power IC Solutions for IoT/Portable/Wearable/Battery-Powered Applications2020/12/30
Richtek Selection Guide [Oct., 2020]2020/12/30
ECG/PPG Measurement Solution2018/10/16
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Introducing Richtek integrated ECG/PPG AFE solution for heart rate sensors2018/08/27 310
Power management for IoT applications2018/07/18 127
Design Tool
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RT1025 Evaluation Board Design Notice2020/09/23