TC7109ACPL

The TC7109 is a 12-bit plus sign, CMOS low power Analog-to-Digital Converter (ADC). Only eight passive components and a crystal are required to form a complete dual slope integrating ADC. The improved VOH source current and other TC7109 features make it an attractive per-channel alternative to analog multiplexing for many data acquisition applications. These features include typical input bias current of 1pA, drift of less than 1µV/°C, input noise typically 15µVP-P, and auto-zero. True differential input and reference allow measurement of bridge type transducers, such as load cells, strain gauges and temperature transducers. The TC7109 provides a versatile digital interface. In the Direct mode, Chip Select and HIGH/LOW byte enable control parallel bus interface. In the Handshake mode, the TC7109 will operate with industry standard UARTs in controlling serial data transmission – ideal for remote data logging. Control and monitoring of conversion timing is provided by the RUN/HOLD input and Status output.

• Zero Integrator Cycle for Fast Recovery from Input Overloads
• Eliminates Cross-Talk in Multiplexed Systems
• 12-Bit Plus Sign Integrating A/D Converter with Over Range Indication
• Sign Magnitude Coding Format
• True Differential Signal Input and Differential Reference Input
• Low Noise: 15µVP-P Typ.
• Input Current: 1pA Typ.
• No Zero Adjustment needed
• TTL Compatible, Byte Organized Tri-State Outputs
• UART Handshake Mode for simple Serial Data Transmissions