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TC7109CPL Datasheet(PDF) 1 Page - Microchip Technology |
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TC7109CPL Datasheet(HTML) 1 Page - Microchip Technology |
1 / 30 page © 2006 Microchip Technology Inc. DS21456C-page 1 TC7109/A 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 μVP-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 *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 applica- tions. These features include typical input bias current of 1pA, drift of less than 1 μV/°C, input noise typically 15 μVP-P, and auto-zero. True differential input and ref- erence allow measurement of bridge type transducers, such as load cells, strain gauges and temperature transducers. The TC7109A 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 TC7109A will operate with industry standard UARTs in controlling serial data transmission – ideal for remote data logging. Control and monitoring of conver- sion timing is provided by the RUN/HOLD input and Status output. For applications requiring more resolution, see the TC500, 15-bit plus sign ADC data sheet. The TC7109A has improved over range recovery performance and higher output drive capability than the original TC7109. All new (or existing) designs should specify the TC7109A wherever possible. Part Number (TC7109X)* Package Temperature Range TC7109CKW 44-Pin PQFP 0°C to +70°C TC7109CLW 44-Pin PLCC 0°C to +70°C TC7109CPL 40-Pin PDIP 0°C to +70°C TC7109IJL 40-Pin CERDIP -25°C to +85°C 12-Bit μA-Compatible Analog-to-Digital Converters |
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