مدار مجتمع (آی سی) آی‌سی جمع‌آوری داده مبدل آنالوگ به دیجیتال (ای‌دی‌سی)

Product Attributes

Introduction

A single-channel, 24-bit high-precision ADC with SPI interface, integrating a programmable low-noise amplifier (1×/32×/64×/128× gain), high-precision Sigma-Delta ADC, and high-frequency internal RC clock. Effective resolution reaches 19.8 bits at 128× PGA gain, with equivalent input noise as low as 16nV/√Hz and zero drift of 5μV. Suitable for applications requiring high precision and low zero drift.

Features

• Operating voltage range: 2.5~5.5V
• Operating current: 0.7mA in active mode, 0.3μA in low-power mode
• Built-in low-noise amplifier with configurable gain of 1/32/64/128×
• 24-bit high-precision, low-offset Sigma-Delta ADC; supports 10/20Hz data rates; linearity 0.001% FS; noise level 16nV/√Hz at 128× PGA; offset voltage 5μV at 64/128× PGA
• Integrated 3.9MHz internal high-frequency RC oscillator; temperature drift 1% over -40~85℃
• Integrated voltage reference with 20ppm/V temperature coefficient; defaults to external reference input
• Built-in low-resistance power switch for controlling bridge sensor resistor path to reduce power consumption
• SPI interface; supports 2-wire SPI; maximum clock 2MHz; supports single-register read/write and CRC protection
• Operating temperature range: -40~+85℃
• Storage temperature range: -40~+125℃
• Package: SOP8

Applications

• Electronic scales
• Analytical balances
• Industrial process control
• DC/AC power measurement
• Ear thermometers