LH001-55 is a low-noise 24 bit ∑△ ADC that provides a complete high-resolution measurement solution. Integrating multiple selection MUXes and gain adjustable PGAs, it can flexibly process differential or single ended signals. Programmable filters allow users to make optimal choices between resolution and output rate. The chip integrates a programmable excitation current source and a temperature sensor internally. Simultaneously integrated with a 12 bit voltage output DAC. 4-wire SPI interface, supporting daisy chain extended multi-channel ADC for simultaneous sampling.



Product 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 differential inputs or 8 single ended inputs



Support self calibration of gain error and offset error



Maximum integral nonlinearity: 13 PPM/FS



Programmable output rate: 2.5SPS-30kSPS



Continuous sampling mode: 525 µ A



Standby current: 0.2 μ A



12 bit voltage output type digital to analog converter (DAC)



Output range: 0~2.5V



Supports a maximum resistance load of 1k Ω and a capacitance load of 200pF



Integrated Temperature Sensor



TIA transimpedance amplifier



Integrate two programmable excitation current sources:



100nA/50μA/100μA/250μA/500μA/750μA/1mA



Built in low-temperature drift reference source: 25ppm/℃



Built-in oscillator



power supply



Simulation: 2.4V to 3.6V



- Number: 1.7V to 3.6V



4-wire SPI interface



Working temperature range: -40 ° C~+125 ° C



Package: 5mm x5mm QFN40



Application scenarios



Bridge transmitter



Portable devices



battery monitor



Industrial temperature measurement



Factory automation process control



Compatible with TI's ADS1256, ADS1258, AD7124 for domestic substitution needs