CS1238 24 bit ADC module Onboard TL431 external reference chip dual channel weighing sensing
PRODUCT INFORMATION
CS1238 is a high precision, low power consumption ADC chip, two differential input channels, built-in temperature sensor and High precision oscillator.
The PGA of the CS1238 can be 1, 2, 64, or 128.
The default value is 128.
The ADC data output rate of CS1238 is optional: 10Hz, 40Hz, 640Hz, 1.28kHz.
The default is 10Hz.
MCU can communicate with CS1238 through
2-wire SPI interface SCLK and DRDY/DOUT to perform configurations, such as channel selection, PGA selection, output rate selection, etc.
1.1 Main functions and features of the chip
Built-in crystal oscillator
Integrated temperature sensor
With Power down function
2 line SPI interface, the fastest rate is 1.1MHz
ADC functional characteristics
24 bits without loss of code
PGA magnification optional: 1, 2, 64, 128
Integrated 2 channel 24 bit difference input without loss of code, in PGA=128 ENOВ 20.7
bit (working 5V)\20.2
Bit (working at 3.3V)
P-P noise: PGA=128, 10Hz: 150nV
INL is less than 0.0015%
Output rate optional: 10Hz, 40Hz, 640Hz, 1.28kHz
Short in-band function
1.2 Chip Application Scenarios
Industrial process control
Electronic scale
Liquid/gas chemical analysis
Hematometer
Intelligent convert
Portable devices
Weight:3.15g
Datasheet: CS1238
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