GXC400

1 Basic Performance
• Chip operating temperature range: -55°C ~ +150°C 
• Handles 100ohm to 1kohm (at 0°C)  Platinum RTDs (PT100 to PT1000) 
• Internal ADC resolution: 15bits 
• ADC Full-scale error: ±1LSB 
• 50 / 60Hz noise rejection: 80dB 
• Single measurement conversion Time: 
50Hz notch: 20.0ms 
60Hz notch: 16.7ms 
• Compatible with Mode 1/3 SPI interface • Supports 2-wire, 3-wire, and 4-wire 
RTD connection 
• Supply voltage range: 2.7V ~ 3.9V 
• Supports RTD fault detection 
• Package Information: 

2 Application Scenarios
•Industrial equipment
• Medical equipment
• Instruments

3. Description
GXC400 is an RTD-to-Digital converter that supports PT100 to PT1000 RTD inputs. GXC400 provides a precise external bias voltage via its BIAS pin and achieves accurate measurement by quantifying the ratio between the RTD and the Reference Resistor (RREF) connected in series to this bias voltage through the built-in ADC. 
GXC400 can provide noise rejection for 50Hz / 60Hz frequency based on the user's operating environment, minimizing the impact of external noise on measurement results. GXC400 supports 2-, 3-, and 4-wire RTD connections to accommodate different RTD measurement schemes. 
GXC400 supports RTD fault detection and can identify various misconnections, including RTD open circuits, RTD short circuits, and RTD shorts to power supply or ground, facilitating users in quickly locating RTD faults. 

Ordering Information

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