TC7109A

TC7109/A 12-Bit A-Compatible Analog-to-Digital Converters Features: 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: 15VP-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 Device Selection Table Part Number (TC7109X)* Package Temperature Range TC7109CKW TC7109CLW TC7109CPL TC7109IJL 44-Pin PQFP 44-Pin PLCC 40-Pin PDIP 40-Pin CERDIP 0°C to +70°C 0°C to +70°C 0°C to +70°C -25°C to +85°C *The “A” version has a higher IOUT on the digital lines. General Description: The TC7109A 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 TC7109A 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 1V/°C, input noise typically 15VP-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 TC7109A provides a ...