MAXREFDES75#

MAXREFDES75# Datasheet

MAXREFDES75# 24-BIT WEIGH SCALE WITH A 16-BIT DAC, 0 TO 10V OUTPUT

Part	Datasheet
MAXREFDES75#	MAXREFDES75# (pdf)

PDF Datasheet Preview
System Board 5985 MAXREFDES75# 24-BIT WEIGH SCALE WITH A 16-BIT DAC, 0 TO 10V OUTPUT Active In Production. OVERVIEW MAXREFDES75# System Board Enlarge+ Introduction Weigh scales perform the critical function of mass measurement for a wide variety of industrial applications. From ultra-small reactant amounts to large cargo containers, weighing provides key information in an array of processes from chemical reactions to commodity management. The critical component of any modern weigh scale is the analog-to-digital converter. The MAXREFDES75# brings a full 24bit ADC into a high-performance system performing small-signal down to ±25mV full scale 24-bit measurements, while generating the high-voltage sensor supply, and producing a 0 to 10V output proportional to the input signal. The MAXREFDES75# reference design features: • Ratiometric measurement or measurement compared to a precision voltage reference • User-programmable offset and gain calibration for sensor load cell • User-programmable offset and gain calibration for DAC • User-programmable voltage output range mapping MAX11270 • 24-bit resolution, 64ksps • Integrated programmable-gain amplifier PGA with gains up to 128 MAX542 • 16-bit resolution with no missing codes • High accuracy INL ±2 LSB max Introduction Weigh scales perform the critical function of mass measurement for a wide variety of industrial applications. From ultra-small reactant amounts to large cargo containers, weighing provides key information in an array of processes from chemical reactions to commodity management. The critical component of any modern weigh scale is the analog-to-digital converter. The MAXREFDES75# brings a full 24bit ADC into a high-performance system performing small-signal down to ±25mV full scale 24-bit measurements, while generating the high-voltage sensor supply, and producing a 0 to 10V output proportional to the input signal. The MAXREFDES75# reference design features: • Ratiometric measurement or measurement compared to a precision voltage reference • User-programmable offset and gain calibration for sensor load cell • User-programmable offset and gain calibration for DAC • User-programmable voltage output range mapping MAXREFDES75# System Board Enlarge+ MAX11270 • 24-bit resolution, 64ksps • Integrated programmable-gain amplifier PGA with gains up to 128 MAX542 • 16-bit resolution with no missing codes • High accuracy INL ±2 LSB max Detailed Description Figure 1 shows the block diagram of the MAXREFDES75#. Figure The MAXREFDES75# reference design block diagram. The signal chain begins with the sensor signal feeding directly into the MAX11270. No external op amp is necessary because the PGA is integrated in the MAX11270. Following isolation via the MAX14850, the MAXQ622 reads the input signal, applies zero-offset and weightfactor, and presents the resulting weight. The MAXQ622 calculates a DAC value, based on DAC calibration and output range mapping and writes this to the DAC. A variety of sensor power options are available, outlined in Table Table Sensor Supply Configuration ADC Input Configuration Connectors Shunt Positions 10V generated on MAXREFDES75# 3.3V generated on MAXREFDES75# Sensor supplied externally ratiometric measurement Sensor supplied externally use voltage reference Output S+ Bridge Output SBridge Ratiometric setup Ratiometric setup Output S+ Bridge Output SBridge Ratiometric setup Ratiometric setup

PDF Datasheet Preview

System Board 5985

MAXREFDES75# 24-BIT WEIGH SCALE WITH A 16-BIT DAC, 0 TO 10V OUTPUT

Active In Production.

OVERVIEW

MAXREFDES75# System Board

Enlarge+

Introduction

Weigh scales perform the critical function of mass measurement for a wide variety of industrial applications. From ultra-small reactant amounts to large cargo containers, weighing provides key information in an array of processes from chemical reactions to commodity management. The critical component of any modern weigh scale is the analog-to-digital converter. The MAXREFDES75# brings a full 24bit ADC into a high-performance system performing small-signal down to ±25mV full scale 24-bit measurements, while generating the high-voltage sensor supply, and producing a 0 to 10V output proportional to the input signal. The MAXREFDES75# reference design features:
• Ratiometric measurement or measurement compared to a precision voltage reference
• User-programmable offset and gain calibration for sensor load cell
• User-programmable offset and gain calibration for DAC
• User-programmable voltage output range mapping

MAX11270
• 24-bit resolution, 64ksps
• Integrated programmable-gain amplifier PGA with
gains up to 128

MAX542
• 16-bit resolution with no missing codes
• High accuracy INL ±2 LSB max

Introduction

Weigh scales perform the critical function of mass measurement for a wide variety of industrial applications. From ultra-small reactant amounts to large cargo containers, weighing provides key information in an array of processes from chemical reactions to commodity management. The critical component of any modern weigh scale is the analog-to-digital converter. The MAXREFDES75# brings a full 24bit ADC into a high-performance system performing small-signal down to ±25mV full scale 24-bit measurements, while generating the high-voltage sensor supply, and producing a 0 to 10V output proportional to the input signal. The MAXREFDES75# reference design features:
• Ratiometric measurement or measurement compared to a precision voltage reference
• User-programmable offset and gain calibration for sensor load cell
• User-programmable offset and gain calibration for DAC
• User-programmable voltage output range mapping

MAXREFDES75# System Board

Enlarge+ MAX11270
• 24-bit resolution, 64ksps
• Integrated programmable-gain amplifier PGA with gains up to 128

MAX542
• 16-bit resolution with no missing codes
• High accuracy INL ±2 LSB max

Detailed Description

Figure 1 shows the block diagram of the MAXREFDES75#.

Figure The MAXREFDES75# reference design block diagram.

The signal chain begins with the sensor signal feeding directly into the MAX11270. No external op amp is necessary because the PGA is integrated in the MAX11270. Following isolation via the MAX14850, the MAXQ622 reads the input signal, applies zero-offset and weightfactor, and presents the resulting weight. The MAXQ622 calculates a DAC value, based on DAC calibration and output range mapping and writes this to the DAC. A variety of sensor power options are available, outlined in Table

Table Sensor Supply Configuration

ADC Input Configuration

Connectors

Shunt Positions
10V generated on MAXREFDES75#
3.3V generated on MAXREFDES75#

Sensor supplied externally ratiometric measurement

Sensor supplied externally use voltage reference

Output S+ Bridge Output SBridge Ratiometric setup Ratiometric setup

Output S+ Bridge Output SBridge Ratiometric setup Ratiometric setup

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAXREFDES75# Datasheet file may be downloaded here without warranties.

Datasheet ID: MAXREFDES75# 647480