LH001-99 is a 24 bit high-precision Δ - ∑ analog-to-digital converter (ADC) developed by Legendsemi, mainly aimed at medical electronics and bioelectric potential measurement applications, such as electroencephalography (EEG), electrocardiogram (ECG) and other devices. The following are its main features and application scenarios:
1. Main characteristics
·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-channel differential input
-Integral nonlinearity: 2 PPM/FS
·Electroencephalogram/Electrocardiogram Measurement (ECG/EEG)
-Input reference noise: 1.02 μ Vpp (250 SPS, gain 24)
-ECG channel input bias current: 200pA
-Data rate: 125SPS to 8kSPS
-Common mode rejection ratio (CMRR): 117dB
-Measurement current: 640uA
-Built in right leg driver amplifier, continuous disconnection detection, test signal
·Built in oscillator and reference voltage
·Standby mode
-Current 0.2 μ A
·Power supply
-Simulation: 2.4V to 3.6V
-Number: 1.7V to 3.6V
·Built in integrated excitation current source
·4-wire SPI interface
·Working temperature range:- 40°C~+85°C
·Encapsulation type:
-40 feet, 5mm x5mm QFN package
-30 feet, 2.95mm x2.95mm WLCSP package
2. Application scenarios
·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
3. Encapsulation and compatibility
QFN40 and WLCSP30 are packaged for easy PCB layout.
Compatible with TI's ADS1299 and suitable for domestic substitution needs.
4. Manufacturer background
Linghui Lixin (Suzhou) focuses on high-performance analog and mixed signal chips, with products widely used in medical, industrial control, automotive electronics, and other fields.
Summary: LH001-99 is a highly integrated, low-noise, multi-channel ADC that is particularly suitable for medical electronics and biological signal acquisition. It has excellent noise performance and flexibility, which can reduce system design complexity and cost.
|
