Product Description

Product details

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

Chip function description

CS1237 is a high precision, low power ADC chip, a differential input channel, built-in temperature sensor and

High precision oscillator.

The PGA of CS1237 can be 1, 2, 64, or 128. The default value is 128.

The CS1237 ADC data output rate in normal mode defaults to 10Hz, 40Hz, 640Hz, or 1.28kHz

It's 10 Hertz;

SCM can communicate with CS1237 through 2-wire SPI interface SCLK and DRDY/dot to make it advance

Row configuration, such as channel selection, PGA selection, and output rate selection.

1.1 Main functions and features of the chip

Built-in crystal oscillator

Integrated temperature sensor

Power off function

2-wire SPI interface with a maximum speed of 1.1MHz

ADC Features:

24-bit lossless code

PGA magnification: 1,2,64,128

1 24-bit differential input with no code loss, ENOB 20 bits (5V) 19.5 bits (3.3V) when PGA = 128

P-p noise: PGA = 128,10 Hz: 180nV;

INL is less than 0.0015%

The output rate can be 10Hz, 40Hz, 640Hz or 1.28kHz

In-band short function

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