ADC
CS1237
MAIN PARAMETERS

24-bit no missing code, ENOB is 20 bits

2-line SPI interface


Introduction

CS1237 is a high-precision and low power consumption analog-to-digital conversion chip. It provides one differential input channels and embeds a temperature sensor and a high-precision oscillator. The MCU can communicate with CS1237 through 2-line SPI interface to configure CS1237, for example, channel selection, PGA selection, and output rate selection.

Features

Built-in crystal oscillator

Integrating a temperature sensor

Supporting the power-down function

2-line SPI interface, with the rate of up to 1.1 MHz

ADC Features

24-bit no missing code

PGA amplification times: 1, 2, 64, and 128

Integrating a 1-channel 24-bit differential input. When the gain of PGA is 128, ENOB is 20 bits (working under 5 V) or 19.5 bits (working under 3.3 V).

P-P noise: PGA=128, 10 Hz: 150 nV

INL smaller than 0.0015%

Output rate options: 10 Hz, 40 Hz, 640 Hz, and 1.28 kHz

Supporting internal short-circuit function

Applications

Poidometer

Precision measurement and control system

Package Type

SOP8

Block Diagram
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