Description

The Microchip Technology Inc. MCP3550/1/3 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 MCP3550/1/3 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.

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 (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 Conversions through 3-wire SPI Interface

• Ultra-Low Conversion Current (MCP3550/1):

-100µA typical (VDD= 2.7V)

-120µA typical (VDD= 5.0V)

• Differential Input with VSSto VDDCommon Mode Range

• 2.7V to 5.5V Single-Supply Operation

• Extended Temperature Range: - -40°C to +125°C

Applications

• Weigh Scales

• Direct Temperature Measurement

• 6-digit DVMs

• Instrumentation

• Data Acquisition

• Strain Gauge Measurement

MCP3551属于集成电路（IC） > 模数转换器（ADC）。微芯科技股份有限公司制造生产的MCP3551模数转换器（ADC）模数转换器（ADC、A/D 或 A 转 D）对模拟信号进行采样，例如由麦克风采集的声音或传感器的输出，然后将其转换为数字信号。一般来说，数字输出是二进制补码二进制数，与输入成比例。输入类型可能是差分、伪差分或单端输入。模数转换器可按照位数、采样率、输入数、接口、转换器数和架构（例如自适应增量、双斜率、折叠、流水线、SAR、三角积分、两步式）进行选择。