CS1238 24-bit ADC Module on-board TL431 External Reference Chip Dual-Channel Weighing Sensor

With an external voltage regulator, the TL431 chip external voltage (2.5V) is used as the excitation source of the external pressure sensor, and the voltage is more stable.

Description:

CS1238 is a high-precision, low-power analog-to-digital converter chip with two differential input channels, built-in temperature sensor and High precision oscillator.
PGA of CS1238 is optional: 1, 2, 64, 128, and the default is 128.
The ADC data output rate of CS1238 is optional: 10Hz, 40Hz, 640Hz, 1.28kHz, and the default is 10Hz;
MCU can communicate with CS1238 through 2-wire SPI interface SCLK, DRDY/DOUT
Line configuration, such as channel selection, PGA selection, output rate selection, etc.

Characteristics: 

• Built-in crystal oscillator
• Integrated temperature sensor With power down function
  
• 2-wire SPI interface, the fastest rate is 1.1MHz
• 24-bit lossless code
• PGA magnification options: 1, 2, 64, 128
• Integrated 2-channel 24-bit lossless differential input, ENOB is 20.7 bits (working at 5V)  20.2 when PGA=128
• Bit (working at 3.3V)
• P-P noise: PGA=128, 10Hz: 150nV;
• INL is less than 0.0015%
• Output rate options: 10Hz, 40Hz, 640Hz, 1.28kHz
• In-band short function