General Description
The TC3405 is a low cost, low power analog-to-digital converter based on Microchip’s Sigma-Delta technology. It will perform 16-bit conversions (15-bit plus sign) at up to eight per second. The TC3405 is optimized for use as a microcontroller peripheral in low cost, battery operated systems. A voltage reference is included, or an external reference can be used. A VDD monitor with a reset generator provides Power-on Reset and Brownout protection while an extra threshold detector is suitable for use as an early warning power fail detector, or as a Wake-up Timer.

Features
• 16-bit Resolution at Eight Conversions Per Second, Adjustable Down to 10-bit Resolution at 512 Conversions Per Second
• 1.8V – 5.5V Operation, Low Power Operating 250µA; Sleep: 35µA
• microPort™ Serial Bus Requires only two Interface Lines
• Uses Internal or External Reference
• Automatically Enters Sleep Mode when not in use
• One Differential and Three Single-ended Inputs with Built-In Multiplexer
• VDD Monitor and Reset Generator Operational in Shutdown Mode

Applications
• Consumer Electronics, Thermostats, CO Monitors, Humidity Meters, Security Sensors
• Embedded Systems, Data Loggers, Portable Equipment
• Medical Instruments