MCP3551

MCP3551/3 Low-Power, Single-Channel 22-Bit Delta-Sigma ADCs Features 22-bit ADC in Small 8-pin MSOP Package with Automatic Internal Offset and Gain Calibration Low-Output Noise of 2.5 µVRMS with Effective Resolution of 21.9 bits (MCP3551) 3 µV Typical Offset Error 2 ppm Typical Full-Scale Error 6 ppm Maximum INL Error Total Unadjusted Error Less Than 10 ppm No Digital Filter Settling Time, Single-Command Conversions through 3-wire SPI™ Interface Ultra-Low Conversion Current (MCP3551): - 100 µA typical (VDD = 2.7V) - 120 µA typical (VDD = 5.0V) Differential Input with VSS to VDD Common Mode Range 2.7V to 5.5V Single-Supply Operation Extended Temperature Range: - -40°C to +125°C Description The Microchip Technology Inc. MCP3551/3 devices are 2.7V to 5.5V low-power, 22-bit Delta-Sigma Analog-to-Digital Converters (ADCs). The devices offer output noise as low as 2.5 µVRMS, with a total unadjusted error of 10 ppm. The family exhibits 6 ppm Integral Non-Linearity (INL) error, 3 µV offset error and less than 2 ppm full-scale error. The MCP3551/3 devices provide high accuracy and low noise performance for applications where sensor measurements (such as pressure, temperature and humidity) are performed. With the internal oscillator and high oversampling rate, minimal external components are required for high-accuracy applications. This product line has fully differential analog inputs, making it compatible with a wide variety of sensor, industrial control or pro...