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Pressure Sensor Interface Signal Conditioning Chip Compatible with Analog and Digital Output
NSA2300 is a low-cost pressure sensor interface chip, with both analog output and digital output supported. It integrates pressure sensor bridge driver, with high precision PGA, 24-bit ADC, customer programmable digital calibration logic and customer-writable OTP. NSA2300 supports sensor nonlinear fitting calibration as well as temperature compensation for sensor sensitivity and bias errors. The packaging mode of this chip is SO8 or MSOP10, and the shipment mode of wafer Know Good Die can also be provided.
Product Features
• Integrated bridge drive, high precision PGA, 24-bit high precision ADC, supporting proportional measurement, strain gauge type or resistance bridge sensor input
• Support sensor diagnosis and output clamp function
• Excellent noise performance: 600nV@OSR = 1024X, Gain = 32X (equivalent to input noise) Calibration accuracy: 0.05% FSO (support second order temperature coefficient and third order nonlinear calibration)
• High-precision internal temperature sensor, (absolute accuracy < 0.5℃, resolution < 0.01℃); support a variety of external temperature sensors (diode, two-terminal thermistor, three terminal thermistor, etc.)
• Support 1.8V to 5.5V power supply
• Support sleep working mode to greatly reduce MCU load. The static current under sleep is at 200nA level at room temperature, and supports Power Down of external bridge power supply.
• Support SPI BUS or I2C digital interface output, with analog proportional/fixed output mode.
Application
• Consumer/industrial pressure sensor modules (washing machine level/pressure cooker/coffee machine/soybean milk machine, etc.)
• Barometer/altimeter/weather forecaster
• Automobile additional pressure sensor module
• Electronic weight scale
Functional Block Diagram
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