legendsemi

EEG

LH001-99 is a high-precision and low-cost analog front end, which supports EEG, ECG measurement and other functions. A low-noise PGA and a 24-bit, 8 kSPS analog-to-digital converter are integrated on the chip. A signal source is integrated on the chip, which can be used for continuous lead break detection, channel path test and temperature measurement. In addition, the right leg drive output function which can realize closed-loop control is integrated on the chip, thus improving the loop CMRR.
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EEG

LH001-99 is a high-precision and low-cost analog front end, which supports EEG, ECG measurement and other functions. A low-noise PGA and a 24-bit, 8 kSPS analog-to-digital converter are integrated on the chip. A signal source is integrated on the chip, which can be used for continuous lead break detection, channel path test and temperature measurement. In addition, the right leg drive output function which can realize closed-loop control is integrated on the chip, thus improving the loop CMRR.


01. Features
Low Noise Programmable Gain Amplifier (PGA) and High Resolution 24-Bit Analog-to-Digital Converter (ADC)
− Programmable gain: 1/2/4/6/8/12/24/48
− 4 differential inputs
− Integral nonlinearity: 2 PPM/FS
Electroencephalogram/Electrocardiogram Measurement (ECG/EEG)
− Input referred noise: 1.02 μVpp (250 SPS, gain 24)
− ECG channel input bias current: 200pA
− Data Rate: 125SPS to 8kSPS
− Common Mode Rejection Ratio (CMRR): 117dB
− Measuring current: 640uA
− Built-in right leg drive amplifier, continuous disconnection detection, test signal
Built-in oscillator and voltage reference
Standby Mode
− Current 0.1 μA
Power
− Analog: 2.4V to 3.6V
− Digital: 1.7V to 3.6V
Built-in integrated excitation current source
4-wire SPI interface
Operating temperature range: -40°C ~+85°C
Packaging
− 40 pins, 5mm x5mm QFN package
− 30 pins, 2.95mm x2.95mm WLCSP package

 

02. Apply

Electroencephalogram (EEG)
Biosafety certification and specific ECG applications, including:
− Wearable Heart Rate Monitor
− Single lead event monitoring, arrhythmia detection
− Single lead wireless patch, inpatient/outpatient monitoring