MCP3421 Series

18-Bit, 240SPS, Single Channel ADC

Catalog

18-Bit, 240SPS, Single Channel ADC

Part	Sampling Rate (Per Second)	Data Interface	Input Range	Utilized IC / Part	Number of A/D Converters	Supplied Contents	Voltage - Supply, Analog [Min]	Voltage - Supply, Analog [Max]	Input Type	Package / Case	Supplier Device Package	Reference Type	Configuration	Mounting Type	Number of Inputs	Features	Operating Temperature [Min]	Operating Temperature [Max]	Voltage - Supply, Digital [Max]	Voltage - Supply, Digital [Min]	Architecture
Microchip Technology MCP3421EV	4 Per Second	Serial	2.5 V	MCP3421	1	Board(s)
Microchip Technology MCP3421A1T-E/CH	3.75 Per Second	I2C			1		2.7 V	5.5 V	Differential	SOT-23-6	SOT-23-6	Internal	PGA-ADC	Surface Mount	1	PGA	-40 °C	125 °C	5.5 V	2.7 V	Sigma-Delta
Microchip Technology MCP3421A2T-E/CH	3.75 Per Second	I2C			1		2.7 V	5.5 V	Differential	SOT-23-6	SOT-23-6	Internal	PGA-ADC	Surface Mount	1	PGA	-40 °C	125 °C	5.5 V	2.7 V	Sigma-Delta
Microchip Technology MCP3421A0T-E/CH	3.75 Per Second	I2C			1		2.7 V	5.5 V	Differential	SOT-23-6	SOT-23-6	Internal	PGA-ADC	Surface Mount	1	PGA	-40 °C	125 °C	5.5 V	2.7 V	Sigma-Delta
Microchip Technology MCP3421A3T-E/CH	3.75 Per Second	I2C			1		2.7 V	5.5 V	Differential	SOT-23-6	SOT-23-6	Internal	PGA-ADC	Surface Mount	1	PGA	-40 °C	125 °C	5.5 V	2.7 V	Sigma-Delta

Catalog

18-Bit, 240SPS, Single Channel ADC

Key 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

Description

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.