Product details:
With external voltage regulator, use external voltage chip TL431 (2.5V) as the trigger source of external pressure sensor, the voltage will be more stable.
Chip function description:
The CS1237 is a high-precision, low-power ADC chip with one differential input channel, an integrated temperature sensor, and a high-precision oscillator.
The PGA of CS1237 can be 1, 2, 64, or 128. The default is 128.
The CS1237 ADC data output rate in normal mode can be 10Hz, 40Hz, 640Hz, or 1.28kHz by default.
It is 10Hz;
The MCU can communicate with the CS1237 via the 2-wire SPI interface SCLK and DRDY/DOUT for progress.
Row configuration such as channel selection, PGA selection, and output rate selection.
Main functions and features of the chip:
Built-in crystal oscillator
Built-in temperature sensor
With power off function
2-wire SPI interface, maximum speed is 1.1MHz.
ADC Working Characteristics:
24-bit no loss of code
PGA expansion: 1, 2, 64, 128
1 24-bit differential input without loss of ENOB code is 20 bit (5V) 19.5 bit (3.3V) when PGA=128.
Noise PP: PGA=128, 10Hz: 180nV;
INL less than 0.0015%
The output rate can be 10Hz, 40Hz, 640Hz, or 1.28kHz.
Short function in a circle
1.2 Chip usage scenarios
industrial process control
electronic scales
Liquid/gas chemical analysis
Blood pressure monitor
Smart Converter
Portable devices