MCP3551屬于集成電路（IC）的模數(shù)轉(zhuǎn)換器（ADC）。由美國(guó)微芯科技公司制造生產(chǎn)的MCP3551模數(shù)轉(zhuǎn)換器（ADC）模數(shù)轉(zhuǎn)換器（ADC、A/D 或 A 轉(zhuǎn) D）對(duì)模擬信號(hào)進(jìn)行采樣，例如由麥克風(fēng)采集的聲音或傳感器的輸出，然后將其轉(zhuǎn)換為數(shù)字信號(hào)。一般來(lái)說(shuō)，數(shù)字輸出是二進(jìn)制補(bǔ)碼二進(jìn)制數(shù)，與輸入成比例。輸入類型可能是差分、偽差分或單端輸入。模數(shù)轉(zhuǎn)換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉(zhuǎn)換器數(shù)和架構(gòu)（例如自適應(yīng)增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進(jìn)行選擇。

描述 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.

特性 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