MICROCHIP MCP3551-E/SN

22-Bit ADC in Small 8-pin MSOP Package with Automatic Internal Offset and Gain Calibration Low output noise of 2.5 μV RMS, effective resolution of 21.9 bits (MCP3550/1) 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 conversion via 3-wire SPI interface Ultra-low conversion current (MCP3550/1):

• 100 μA typical (VDD = 2.7V)
• 120 μA typical (VDD = 5.0V) Differential input with common-mode range from VSS to VDD Single power supply from 2.7V to 5.5V Extended temperature range: -40°C to +125°C

2.7V to 5.5V low-power, 22-bit Delta-Sigma analog-to-digital converters (ADCs). The device features an output noise as low as 2.5 μV RMS and a total unadjusted error of 10 ppm. The products in this series have an integral nonlinearity (INL) error of 6 ppm, an offset error of 3 μV, and a full-scale error of less than 2 ppm. The MCP3550/1/3 devices offer high-precision and low-noise performance for sensor measurement applications such as pressure, temperature, and humidity. With an internal oscillator and a high oversampling rate, very few external components are required for high-precision applications. This product line has fully differential analog inputs and is suitable for various sensor, industrial control, or process control applications. The MCP3550/1/3 devices operate over a temperature range of -40°C to +125°C and are available in space-saving 8-pin MSOP and SOIC packages.

• 22-bit ADC in compact 8-pin MSOP package with automatic internal offset and gain calibration
• Low output noise 2.5 μV RMS, effective resolution 21.9 bits (MCP3550/1)
• 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 conversion via 3-wire SPI interface
• Ultra-low conversion current (MCP3550/1):
  • 100 μA typical (VDD = 2.7V)
  • 120 μA typical (VDD = 5.0V)
• Differential input, common-mode range VSS to VDD
• 2.7V to 5.5V single-supply operation
• Extended temperature range: -40°C to +125°C

• Weighing scales
• Direct temperature measurement
• 6-digit digital voltmeter
• Instrumentation
• Data acquisition
• Strain gauge measurement