CS1237 24 bit analog-to-digital ADC converter IC SMD SOP8

Description

CS1237 24 bit analog-to-digital ADC converter IC SMD SOP8

General Description

The CS1237 is a high-precision, low-power 24-bit Δ-Σ (delta-sigma) ADC designed for measuring small analog signals such as load cells, pressure sensors, and other bridge-type sensors.
It integrates a programmable gain amplifier (PGA), voltage reference, oscillator, and control logic in a compact SOP-8 package, minimizing external component requirements.

It is ideal for weighing scales, industrial sensors, and data acquisition systems requiring high accuracy and low noise.

⚙️ Key Features

• 24-bit Delta-Sigma ADC

• Programmable Gain Amplifier (PGA): 1, 2, 64, 128

• Integrated Oscillator (no external crystal needed)

• Low Noise, High Resolution Conversion

• Single Conversion or Continuous Mode

• Internal Voltage Reference (2.5 V)

• Low Power Consumption

• Simple 2-wire serial interface (PD_SCK, DOUT)

• Compact SOP-8 Package

⚡ Electrical Characteristics

📦 Pin Configuration (SOP-8)

🔧 Functional Overview

• The CS1237 continuously samples the differential input voltage (AIN+ – AIN–) using a Δ-Σ modulator, followed by a digital filter.

• Data is output through the DOUT pin using a clock from PD_SCK, similar to the HX711 interface.

• When PD_SCK is held high for >1 ms, the device enters power-down mode.

• The gain and sampling rate are selectable through internal registers or configuration programming.

🧠 Key Internal Blocks

• 24-bit Δ-Σ ADC

• PGA (Programmable Gain Amplifier)

• Voltage reference (2.5V)

• Oscillator and digital filter

• Serial data output logic

🧪 Typical Performance