The LH001-55 is a low noise 24-bit ΣΔADC that provides a complete high resolution measurement solution. Integrated multiplexer MUX and gain-adjustable PGA for flexible processing of differential or single-ended signals. Programmable filters allow the user to optimally choose between resolution and output rate. The chip integrates a programmable excitation current source and a temperature sensor. A 12-bit voltage output DAC is also integrated. 4-wire SPI interface, supports daisy chain expansion of multiple ADCs to achieve simultaneous sampling.

Product 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 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: 525µA

− Standby current: 0.2 μA

  • 12-Bit Voltage Output Digital-to-Analog Converter (DAC)

− Output range: 0~2.5V

− Supports a maximum resistive load of 1kΩ and a capacitive load of 200pF

  • Integrated temperature sensor
  • TIA Transimpedance Amplifier
  • Integrates 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

− Analog: 2.4V to 3.6V

− Digital: 1.7V to 3.6V

  • 4-wire SPI interface
  • Operating temperature range: -40°C ~+125°C
  • Package: 5mmx5mm QFN40

Application Scenario

  • Bridge transmitter
  • Portable device
  • Battery monitoring
  • Industrial temperature measurement
  • Factory Automation Process Control