The Z250 is a highly integrated, low-powered conditioning sensor chip designed for bridge resistance sensors; The chip performs high-precision amplification and 14-bit analog-to-digital conversion of the sensor input signal, and then calculates the coefficient stored by the on-chip EEPROM through DSP to achieve accurate and fast calibration of the sensor, and the final calibration result can be output analog signal by the on-chip DAC, or calibrated digital signal through I2C output. For the bridge resistive sensor signal, the Z250 digitally calibrates the zero-bias, gain and nonlinearity of the bridge; The Z250 has an integrated temperature sensor, which can realize digital calibration of the sensor's temperature linearity or nonlinearity.

The Z250 chips are specially designed for calibration production, making them suitable for large-scale batch calibration.

Features

• No external compensation components required;
• Automatic large-scale chip configuration and calibration via I2C or one-bit serial digital interface at a simple and low cost;
• High accuracy (-25°C~85°C error at ±0.1% FSO; The error at -40°C~125°C is ±0.25% FSO);
• Suitable for battery-powered applications;
• 12-bit DAC output

Technical Support

• Development kits available;
• Support large-scale calibration operations;
• Provide customized calibration procedures according to customer needs.

Physical Characteristics

• Operating temperature range: -40°C~+125°C;
• Withstand voltage range: 10V;
• ESD protection: HBM > 6000V;

Basic Performance Index

• Digital compensation of sensor bias, sensitivity, temperature drift and nonlinearity;
• Built-in EEPROM: reprogramming to improve system yield;
• Set the analog/digital gain through EEPROM, suitable for differential sensors with input signal range of 1.2~60mV/V;
• Set the zero bias of the sensor through EEPROM, suitable for sensors with large zero bias;
• EEPROM data protection; EEPROM automatic error correction;
• Massive calibration design: one calibration board can simultaneously verify up to 7680 sets of sensing modules;
• User ID settings: up to 24 bits reserved;
• Power supply voltage: +3.3V~+5.5V;
• If an external JFET is used, the power supply voltage is +4.5V~+30V;
• Typical operating current value of 1.8mA:
• Typical response time is 0.25mS;
• Wide operating temperature range: -40°C~+125°C;
• Built-in sensor power connection, wire break, short circuit, and EEPROM integrity diagnostics;
• Analog output clamp setting;
• On-chip integrated oscillator and temperature measurement unit, no external components required;
• Optional external temperature compensation;
• Output mode optional: analog proportional voltage output, digital I2C output, one-bit serial digital output.