• Low Current Consumptio購商n: - 145 µA typical (VDD=如下 3V, Continuous Conversi校中on) - 39 µA typical (VDD= 3森視V, One-Shot Conversion 村船with 1 SPS) • Supports I2C Serial Inte朋下rface: - Standard, Fast and High Speed 一從Modes • Single Suppl生船y Operation: 2.7V to 5.5V • Ext通森ended Temperature Range: -40°C to +125°來近C Typical Applications • Portable Ins但快trumentation • Weigh Scales and Fuel視書 Gauges • Temperature Sensing 拿微with RTD, Thermistor, and火笑 Thermocouple • Bridge Sensing for Pres關風sure, Strain, and Force. P著玩ackage Types Description The又請 MCP3421 is a single channel low-no答司ise, high accuracy ΔΣ A你森/D converter with differentia愛音l inputs and up to 18 bits of resolu為老tion in a small SOT-23-6 pa個那ckage. The on-board precision 2.04術理8V reference voltage enables an生場 input range of ±2.048V differentially 花票(Δ voltage = 4.096V). The device u在來ses a two-wire I2C com舞習patible serial interfa林木ce and operates from a s友暗ingle 2.7V to 5.5V power 匠地supply. The MCP3421 device performs co雜拿nversion at rates of 3女錢.75, 15, 60, or 240 samples per離白 second (SPS) depending on樂花 the user controllable configurat兒黑ion bit settings using the tw兒校o-wire I2C serial interface. This dev拍商ice has an on-board programmable ga樹還in amplifier (PGA). The user can selec機畫t the PGA gain of x1,信家 x2, x4, or x8 before the anal農技og-to-digital conversion takes pl近鐵ace. This allows the MCP3421 放為device to convert a 議拿smaller input signal with high r放金esolution. The device has two 器很conversion modes: (a) Continuous mo和通de and (b) One-Shot mode. In One-Sh去鄉ot mode, the device enters a 業好low current standby mode automatic務關ally after one conversion. This re明如duces current consumption 分醫greatly during idle 自新periods. The MCP3421 device 資作can be used for various high accuracy 東說analog-to-digital data conversion app新們lications where design山文 simplicity, low power, and small footp睡頻rint are major consideratio話志ns.