DESCRIPTION

· The MCP3422/3/4 are 18-bit ΔΣ ADCs with differential inputs, offering 2 or 4 channels.

· Features include a 2.048V ±0.05% on-board reference, programmable gain amplifier (PGA), and self-calibration.

· Supports one-shot or continuous conversion modes with configurable data rates from 3.75 to 240 SPS.

· Operates on a single 2.7V to 5.5V supply with an I2C interface in standard, fast, or high-speed modes.

· Suitable for applications requiring high accuracy and low noise in extended temperature ranges (-40°C to +125°C).

FEATURES

· 18-bit resolution with differential inputs: 2 channels (MCP3422/3) or 4 channels (MCP3424).

· On-board 2.048V reference with ±0.05% accuracy and 15 ppm/°C drift.

· PGA with selectable gains of 1, 2, 4, or 8.

· Programmable data rates: 3.75 SPS (18-bit), 15 SPS (16-bit), 60 SPS (14-bit), 240 SPS (12-bit).

· Low power consumption: 135 µA (continuous), 36 µA (one-shot at 1 SPS).

· I2C interface with configurable address pins for MCP3423/4.

APPLICATIONS

· Portable instrumentation and consumer electronics.

· Temperature sensing with RTDs, thermistors, and thermocouples.

· Bridge sensing for pressure, strain, and force measurements.

· Weigh scales and battery fuel gauges.

· Factory automation equipment.