MCP3421

The MCP3421 is a single channel low-noise, high accuracy delta-sigma A/D converter with differential inputs and up to 18 bits of resolution in a small SOT-23-6 package. The on-board precision 2.048V reference voltage enables an input range of ±2.048V differentially. The device uses a two-wire I2C™ compatible serial interface and operates from a single power supply ranging from 2.7V to 5.5V. The MCP3421 device performs conversions at rates of 3.75, 15, 60 or 240 samples per second depending on user controllable configuration bit settings using the two-wire I2C™ compatible serial interface. This device has an onboard programmable gain amplifier (PGA). User can select the PGA gain of x1, x2, x4, or x8 before the analog-to-digital conversion takes place. This allows the MCP3421 device to convert a smaller input signal with high resolution. The device has two conversion modes: (a) Continuous mode and (b) One-Shot mode. In One-Shot mode, the device enters a low current standby mode automatically after one conversion. This reduces current consumption greatly during idle periods. The MCP3421 device can be used for various high accuracy analog-to-digital data conversion applications where ease of use, low power consumption and small footprint are major considerations.

产品特性
  • 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
  • Programmable data rate options 3.75 SPS (18 bits) 15 SPS (16 bits) 60 SPS (14 bits) 240 SPS (12 bits)
  • 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
技术参数
Parameter Name Value Value
Typical Supply Current (µA) 155 155
Typical INL (ppm) 10 10
Max Sample Rate (samples/sec) 4 4
Input Type 1 Differential 1 Differential
Interface I²C™ I²C™
Resolution (bits) 18 18
Supply Voltage Range (V) 2.7 to 5.5 2.7 to 5.5
文档资料
18-Bit ADC with I2C Interface and Onboard ReferenceData Sheets08/10/2009722KB
AN1156 - Battery Fuel Measurement Using Delta-Sigma ADC DevicesAppNote01/25/2008318KB
Automotive Recommended Product Selector GuideBrochures09/16/20147598KB
Signal Chain Design GuideBrochures11/10/20123229KB
Utility Metering BrochureBrochures10/06/20143370KB
Low Power Analog SolutionsSell Sheets05/16/2011120KB
Analog & Interface Product Selector GuideProduct Line Card03/21/20164116KB
MCP3421 SOT-23-6 Evaluation Board User's GuideUser Guides02/03/2009584KB
Thermocouple Reference DesignUser Guides01/22/2010372KB
订购型号
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MCP3421A0T-E/CH6SOT-23-40C to +125CT/R2.391.991.811.751.73
MCP3421A1T-E/CH6SOT-23-40C to +125CT/R2.391.991.811.751.73
MCP3421A2T-E/CH6SOT-23-40C to +125CT/R2.391.991.811.751.73
MCP3421A3T-E/CH6SOT-23-40C to +125CT/R2.391.991.811.751.73
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