描述 Description

The MCP3221 is a successive approximation A/D converter with 12-bit resolution. Available in the SOT-23 package, this device provides one single-ended input with very low power consumption. The MCP3221 provides a low maximum conversion current and standby current of 250 μA and 1 μA respectively. Low current consumption combined with the small SOT-23 package make this device ideal for battery powered and remote data acquisition applications. Communication to the MCP3221 is performed using a 2-wire I2C?Compatible compatible interface. Standard (100 kHz) and Fast (400 kHz) I2C?Compatible modes are available with the device. An on-chip conversion clock enables independent timing for the I2C?Compatible clock and the conversion clock.The device is also addressable allowing up to eight devices on a single 2-wire bus. The MCP3221 runs on a single supply voltage that operates over a broad range of 2.7 V to 5.5 V. This device also provides excellent linearity of ±1 LSB differential non-linearity and ±2 LSB integral non-linearity. Operating temperature range for this device is -40°C to +125°C.

特性 Features

?12-bit resolution
?I2C? Compatible serial interface
?±1 LSB DNL
?±2 LSB INL max
?22.3 ksps in I2C Fast Mode
?Single-ended analog input channel
?On-chip sample and hold
?On-chip conversion clock
? AEC-Q100 Grade 1

簡介

MCP3221屬于集成電路（IC）的模數(shù)轉換器（ADC）。由制造生產(chǎn)的MCP3221模數(shù)轉換器（ADC）模數(shù)轉換器（ADC、A/D 或 A 轉 D）對模擬信號進行采樣，例如由麥克風采集的聲音或傳感器的輸出，然后將其轉換為數(shù)字信號。一般來說，數(shù)字輸出是二進制補碼二進制數(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)轉換器可按照位數(shù)、采樣率、輸入數(shù)、接口、轉換器數(shù)和架構（例如自適應增量、雙斜率、折疊、流水線、SAR、三角積分、兩步式）進行選擇。