MCP3425 datasheet(1/38 Pages) MICROCHIP

部件名	MCP3425

功能描述	16-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference

PDF	38 Pages

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制造商	MICROCHIP [Microchip Technology]

网页	http://www.microchip.com

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1 / 38 page

DS22072B-page 1

MCP3425

Features

• 16-bit

ΔΣ ADC in a SOT-23-6 package

• Differential Input Operation

• Self Calibration of Internal Offset and Gain per

each conversion

• On-Board Voltage Reference:

- Accuracy: 2.048V ± 0.05%

• On-Board Programmable Gain Amplifier (PGA):

- Gains of 1, 2, 4 or 8

• On-Board Oscillator

• INL: 10 ppm of FSR (FSR = 4.096V/PGA)

• Programmable Data Rate Options:

- 15 SPS (16 bits)

- 60 SPS (14 bits)

- 240 SPS (12 bits)

• One-Shot or Continuous Conversion Options

• Low Current Consumption:

- 145 µA typical

(VDD= 3V, Continuous Conversion)

• One-Shot Conversion (1 SPS) with VDD = 3V:

- 9.7 µA typical with 16 bit mode

- 2.4 µA typical with 14 bit mode

- 0.6 µA typical with 12 bit mode

• Supports I2C Serial Interface:

- Standard, Fast and High-Speed Modes

• Single Supply Operation: 2.7V to 5.5V

• Extended Temperature Range: -40°C to 125°C

Typical Applications

• Portable Instrumentation

• Weigh Scales and Fuel Gauges

• Temperature Sensing with RTD, Thermistor, and

Thermocouple

• Bridge Sensing for Pressure, Strain, and Force.

Package Types

Description

The MCP3425 is a single channel low-noise, high

accuracy

ΔΣ A/D converter with differential inputs and

up to 16 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

(

Δ voltage = 4.096V). The device uses a two-wire I2C

compatible serial interface and operates from a single

2.7V to 5.5V power supply.

The MCP3425 device performs conversion at rates of

15, 60, or 240 samples per second (SPS) depending

on the user controllable configuration bit settings using

the two-wire I2C serial interface. This device has an

on-board programmable gain amplifier (PGA). The

user can select the PGA gain of x1, x2, x4, or x8 before

the analog-to-digital conversion takes place. This

allows the MCP3425 device to convert a smaller input

signal with high resolution. The device has two conver-

sion modes: (a) Continuous mode and (b) One-Shot

mode. In One-Shot mode, the device enters a low

current standby mode automatically after one conver-

sion. This reduces current consumption greatly during

idle periods.

The MCP3425 device can be used for various high

accuracy analog-to-digital data conversion applications

where design simplicity, low power, and small footprint

are major considerations.

Block Diagram

1

2

3

4

5

6

VIN+

VSS

SCL

VIN-

VDD

SDA

MCP3425

SOT-23-6

VSS

VDD

VIN+

VIN-

SCL

SDA

Voltage Reference

Clock

(2.048V)

I2C Interface

Gain = 1, 2, 4, or 8

VREF

ΔΣ ADC

Converter

PGA

Oscillator

16-Bit Analog-to-Digital Converter

with I2C Interface and On-Board Reference

类似零件编号 - MCP3425

制造商	部件名	数据表	功能描述
Microchip Technology	MCP3425	497Kb / 30P	16-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference 2007
	MCP3425A0TECH	497Kb / 30P	16-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference 2007
	MCP3425A1TECH	497Kb / 30P	16-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference 2007
	MCP3425A2TECH	497Kb / 30P	16-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference 2007
	MCP3425A3TECH	497Kb / 30P	16-Bit Analog-to-Digital Converter with I2C Interface and On-Board Reference 2007

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