Microchip | MCP3426A0-E/SN

The MCP3426 series of two channel low-noise, high accuracy delta-sigma A/D converter with differential inputs and up to 16 bits of resolution. The on-board precision 2.048 V reference voltage enables an input range of ±2.048 V differentially. The device uses a two-wire I2C™ compatible serial interface and operates from a single power supply ranging from 2.7 V to 5.5 V. The MCP3426 device performs conversions at rates of 15, 60 or 240 samples per second depending on user controllable configuration bit settings using the two-wire I2C™Compatible Compatible serial interface.

This device has an onboard programmable gain amplifier (PGA). User can select the PGA gain of x1, x2, x4, or x8 before the analog-to-digital conversion takes place. This allows the MCP3426 device to convert a smaller input signal with high resolution. The device has two conversion modes: (a) Continuous mode and (b) One-Shot mode. In One-Shot mode, the device enters a low current standby mode automatically after one conversion. This reduces current consumption greatly during idle periods. The MCP3426 device 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. 

Features:

• 16-bit resolution
• 2-channel differential input operation
• On-board voltage reference with 15 ppm/°C drift
• On-board PGA, gains of 1, 2, 4, 8
• Programmable data rate options
• 15 SPS (16 bits)
• 60 SPS (14 bits)
• 240 SPS (12 bits)
• INL 10 ppm of FSR typ.
• Low current consumption, 135 µA at 3 V
• One-shot or continuous conversion options
• Supports I2C™ interface
• Extended temperature range -40°C to +125°C

Applications:

• Portable Instrumentation and Consumer Goods
• Temperature Sensing with RTD, Thermistor, and Thermocouple
• Bridge Sensing for Pressure, Strain, and Force
• Weigh Scales and Battery Fuel Gauges
• Factory Automation Equipment