MCP3421数据手册集成电路（IC）的模数转换器（ADC）规格书PDF

描述 Description

The MCP3421 ADC can be used for various high accuracyanalog-to-digital data conversion applications where ease of use, lowpower consumption and small footprint are major considerations.TheMCP3421 is a single channel low-noise, high accuracy delta-sigma A/Dconverter with differential inputs and up to 18 bits of resolution in asmall SOT-23-6 package. Please consider the MCP3425 version forresolutions up to 16 bits. The on-board precision 2.048V referencevoltage enables a differential input range of ±2.048V. The device uses atwo-wire I2C™ compatible interface and operates from asingle power supply ranging from 2.7V to 5.5V.The MCP3421 ADC performs conversions at rates of 3.75, 15, 60 or 240samples per second with corresponding resolutions of 18, 16, 14 and 12 bits.The onboard programmable gain amplifier (PGA) provides gain up to 8x.The device has two conversion modes: Continuous mode and One-Shot mode.In One-Shot mode, the device enters a low current standby modeautomatically after a conversion, greatly reducing power use.

特性 Features

18-bit resolution
Small 6-lead SOT-23 packaging
Differential input operation
On-board voltage reference with 5 ppm/°C drift
On-board PGA, gains of 1, 2, 4, 8
3.75 SPS (18 bits)
15 SPS (16 bits)
60 SPS (14 bits)
240 SPS (12 bits)
INL 10 ppm of FSR max
Low current consumption, 145 µA at 3V
One-shot or continuous conversion options
Supports I2C™ serial interface
Extended temperature range: -40°C to +125°C

简介

MCP3421属于集成电路（IC）的模数转换器（ADC）。由制造生产的MCP3421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。