GXC900

1 Features 
• Complete front-end for high resolution applications 
• 24 bits without missing code 
• Internal amplifier, gain of 1-to-128 
• Internal oscillator 
• Internal LDOs 
• Selectable 10, 40, 500, 1,000 (SPS) data rates • External voltage reference up to 5V for ratiometric measurements 
• Simple, pin-driven control 
• 2-wire serial interface (SPI or I²C) with power down function. 
• Supply Range: 2.7V to 5.5V 
• Temperature Range: –40°C to +105°C 
• Package Information： 

2 Applications 
• Weigh Scales 
• Strain Gauges 
• Pressure Sensors 
• Industrial Process Control 
• Electronic Scales

3 Description 
 The GXC900 is a precision, 24-bit analog-to-digital converter (ADC). With an onboard low-noise amplifier, onboard oscillator, precision second-order 24-bit delta-sigma (ΔΣ) modulator, the GXC900 provides a complete front-end solution for bridge sensor applications including weigh scales, strain gauges, and load cells. 
The low-noise amplifier has a gain of 1/2/64/128, supporting a full-scale differential input of ±4.5V. The ΔΣ ADC has 24-bit resolution and is comprised of a second-order modulator and third-order digital filter. 
Four data rates are supported: 10, 40, 500, and 1,000SPS. The GXC900 can be put in power down mode. The GXC900 is available in an SOP-8 package and is specified from -40°C to +105°C. 

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