描述 Description

The MCP3422, MCP3423 and MCP3424 devices (MCP3422/3/4) are the low noise and high accuracy 18-Bit delta-sigma analog-to-digital (ΔΣ A/D) converter family members of the MCP342X series from Microchip Technology Inc. These devices can convert analog inputs to digital codes with up to 18 bits of resolution.

特性 Features

? 18-bit ΔΣ ADC with Differential Inputs:

- 2 channels: MCP3422 and MCP3423

- 4 channels: MCP3424

? Differential Input Full Scale Range: -VREF to +VREF

? Self Calibration of Internal Offset and Gain per Each Conversion

? On-Board Voltage Reference (VREF):

- Accuracy: 2.048V ± 0.05

- Drift: 15 ppm/°C

? On-Board Programmable Gain Amplifier (PGA):

- Gains of 1, 2, 4 or 8

? INL: 10 ppm of Full Scale Range

? Programmable Data Rate Options:

- 3.75 SPS (18 bits)

- 15 SPS (16 bits)

- 60 SPS (14 bits)

- 240 SPS (12 bits)

? One-Shot or Continuous Conversion Options

? Low Current Consumption:

- 135 μA typical (VDD= 3V, Continuous Conversion)

- 36 μA typical (VDD= 3V, One-Shot Conversion with 1 SPS)

? On-Board Oscillator

? I2C? Interface:

- Standard, Fast and High Speed Modes

- User configurable two external address pins for MCP3423 and MCP3424

? Single Supply Operation: 2.7V to 5.5V

? Extended Temperature Range: -40°C to +125°C

Typical Applications

? Portable Instrumentation and Consumer Goods

? Temperature Sensing with RTD, Thermistor, and Thermocouple

? Bridge Sensing for Pressure, Strain, and Force

? Weigh Scales

? Battery Fuel Gauges

? Factory Automation Equipment