MAXREFDES75# 24-bit electronic scale with 16-bit DAC, 0 to 10V output

Overview

Electronic scales are widely used in the weight measurement industry. From ultra-lightweight reagents to large shipping containers, weighing provides critical information for processes ranging from chemical reactions to commodity management. The key component of all modern electronic scales is the analog-to-digital converter. The MAXREFDES75# integrates a complete 24-bit ADC into a high-performance system, performing small-signal (down to ±25mV full-scale) 24-bit measurements while generating high-voltage sensor power to produce a 0 to 10V output proportional to the input signal.

Features of the MAXREFDES75# reference design include:

• Ratio measurement or comparison measurement with high precision voltage reference
• Offset and gain calibration of user programmable sensors (load cells)
• User-programmable DAC offset and gain calibration
• User programmable voltage output range mapping

MAX11270

• 24-bit resolution, 64ksps
• 6nV/√Hz integrated programmable gain amplifier (PGA) with gain up to 128

MAX542

• 16-bit resolution, no missing codes
• High accuracy INL ±2 LSB (maximum)