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MCP3421

Status: In Production

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
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The MCP3421 ADC 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.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. Please consider the MCP3425 version for resolutions up to 16 bits. The on-board precision 2.048V reference voltage enables a differential input range of ±2.048V. The device uses a two-wire I2C™ compatible interface and operates from a single power supply ranging from 2.7V to 5.5V. The MCP3421 ADC performs conversions at rates of 3.75, 15, 60 or 240 samples 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 mode automatically after a conversion, greatly reducing power use.

Additional 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
    • Programmable data rate options
      • 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
Parametrics
Name
Value
Typical Supply Current (µA)
155
Typical INL (ppm)
10
Max Sample Rate (samples/sec)
4
Input Type
1 Differential
Interface
I²C™
Resolution (bits)
18
Supply Voltage Range (V)
2.7 to 5.5

Documents

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Brochures

Product Line Card

Brochures

05/16/2011
120KB

Development Environment

  • Demo & Evaluation Boards
  • Application Examples
Demo & Evaluation Boards
MCP3421 Battery Fuel Gauge Demo Board
MCP3421 Battery Fuel Gauge Demo Board ( MCP3421DM-BFG )

The MCP3421 Battery Fuel Gauge Demo Board demonstrates how to measure the battery voltage and discharging current using the MCP3421.

The MCU algorithm calculates the battery fuel being used. This demo board is shipped with 1.5V AAA non-rechargeable battery. The demo board displays the following parameters:

Measured battery voltage.
Measured battery

...

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MCP3421 SOT23-6 Eval Board
MCP3421 SOT23-6 Eval Board ( MCP3421EV )

The MCP3421 SOT23-6 Evaluation Board (P/N MCP3421EV) contains a MCP3421 18-bit Delta-Sigma Analog-to-Digital Converter (ADC). The MCP3421 is an 18-bit single channel ADC device with various options. The MCP3421 SOT23-6 Evaluation Board has analog input connection pads and VDD, SDA, and SCL test pads. The user can connect any sensor input signal to this evaluation board and test the ADC conversion...

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Thermocouple Reference Design Board
Thermocouple Reference Design Board ( TMPSNSRD-TCPL1 )

The Thermocouple Reference Design demonstrates how to instrument a Thermocouple and accurately sense temperature over the entire Thermocouple measurement range. This solution uses the MCP3421 18-Bit Analog-to-Digital Converter (ADC) to measure voltage across the Thermocouple.

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MCP3421A2T-E/CH
0.017000
0.046667
6
SOT-23
-
Matte Tin
e3
MCP3421A0T-E/CH
0.017000
0.046667
6
SOT-23
-
Matte Tin
e3
MCP3421A1T-E/CH
0.017000
0.046667
6
SOT-23
-
Matte Tin
e3
MCP3421A3T-E/CH
0.017000
0.046667
6
SOT-23
-
Matte Tin
e3
MCP3421A0T-E/CHVAO
0.017000
0.046667
6
SOT-23
-
Matte Tin
e3
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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