MCP3422A1T-E/SN

MCP3422A1T-E/SN is a low-noise and high-accuracy 18-bit delta-sigma analogue-to-digital (ΔΣ A/D) converter. This device can output analogue-to-digital conversion results at rates of 240 samples per second depending on the user-controllable configuration bit settings using the two-wire I²C serial interface. During each conversion, this device calibrates offset and gain errors automatically. This provides accurate conversion results from conversion to conversion over variations in temperature and power supply fluctuation. The user can select the PGA gain of x1, x2, x4, or x8 before the analogue-to-digital conversion takes place. This allows the device to convert a very weak input signal with high resolution. It is used in applications such as portable instrumentation and consumer goods, temperature sensing with RTD, thermistor, and, thermocouple, bridge sensing for pressure, strain, and force, weigh scales, battery fuel gauges, and factory automation equipment.

• Differential input full scale range: -VREF to +VREF
• Self calibration of internal offset and gain per each conversion
• Single supply operation range from 2.7V to 5.5V
• 2-channel 18-bit ADC
• Differential full scale input voltage range is ±2.048V typical at (TA = -40°C to +85°C)
• Output noise is 1.5µVRMS typical at (TA = -40°C to +85°C)
• Integral non-linearity is 10ppm of FSR typical at (TA = -40°C to +85°C)
• Gain error is 0.05% typical at (PGA = 1, DR = 3.75SPS)
• Supply current during conversion is 145µA typical at (VDD = 5.0V)
• Operating temperature range from -40°C to +125°C, 8-lead DFN package