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TC7109

TelCom
Part Number TC7109
Manufacturer TelCom
Description 12-BIT UP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS
Published Aug 21, 2005
Detailed Description 1 TC7109 TC7109A 12-BIT µP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES s s s s s s s s s s Zero-Integrator Cycle fo...
Datasheet PDF File TC7109 PDF File

TC7109
TC7109

Overview
1 TC7109 TC7109A 12-BIT µP-COMPATIBLE ANALOG-TO-DIGITAL CONVERTERS FEATURES s s s s s s s s s s Zero-Integrator Cycle for Fast Recovery From Input Overloads Eliminates Cross -Talk in Multiplexed Systems 12-Bit Plus Sign Integrating A/D Converter With Overrange Indication Sign Magnitude Coding Format True Differential Signal Input and Differential Reference Input Low Noise .
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15 µVP-P Typ Input Current .
1 pA Typ No Zero Adjustment Needed TTL-Compatible, Byte-Organized Tri-State Outputs UART Handshake Mode for Simple Serial Data Transmission 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 TC7109A has features that 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 TC7109A provides a versatile digital interface.
In the direct mode, chip select and HIGH/LOW byte enables 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 conversion 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 overrange recovery performance and higher output drive capability than the original TC7109.
All new (or existing) designs should specify the TC7109A wherever possible.
2 3 4 5 6 18 19 20 LBEN HBEN CE/LOAD ...


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