Datenblatt-Suchmaschine für elektronische Bauteile |
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TC7116CKW Datenblatt(PDF) 1 Page - Microchip Technology |
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TC7116CKW Datenblatt(HTML) 1 Page - Microchip Technology |
1 / 22 page © 2002 Microchip Technology Inc. DS21457B-page 1 TC7116/A/TC7117/A Features • Low Temperature Drift Internal Reference - TC7116/TC7117 80 ppm/°C Typ. - TC7116A/TC7117A 20 ppm/°C Typ. • Display Hold Function • Directly Drives LCD or LED Display • Zero Reading with Zero Input • Low Noise for Stable Display - 2V or 200mV Full Scale Range (FSR) • Auto-Zero Cycle Eliminates Need for Zero • Adjustment Potentiometer • True Polarity Indication for Precision Null Applications • Convenient 9V Battery Operation: (TC7116/TC7116A) • High Impedance CMOS Differential Inputs: 1012 Ω • Low Power Operation: 10mW Applications • Thermometry • Bridge Readouts: Strain Gauges, Load Cells, Null Detectors • Digital Meters: Voltage/Current/Ohms/Power, pH • Digital Scales, Process Monitors • Portable Instrumentation Device Selection Table General Description The TC7116A/TC7117A are 3-1/2 digit CMOS analog- to-digital converters (ADCs) containing all the active components necessary to construct a 0.05% resolution measurement system. Seven-segment decoders, polarity and digit drivers, voltage reference, and clock circuit are integrated on-chip. The TC7116A drives liq- uid crystal displays (LCDs) and includes a backplane driver. The TC7117A drives common anode light emit- ting diode (LED) displays directly with an 8mA drive current per segment. These devices incorporate a display hold (HLDR) func- tion. The displayed reading remains indefinitely, as long as HLDR is held high. Conversions continue, but output data display latches are not updated. The refer- ence low input (VREF-) is not available, as it is with the TC7106/7107. VREF- istiedinternallytoanalogcom- mon in the TC7116A/7117A devices. The TC7116A/7117A reduces linearity error to less than 1 count. Rollover error (the difference in readings for equal magnitude but opposite polarity input signals) is below ±1 count. High-impedance differential inputs offer 1pA leakage current and a 1012 Ω input imped- ance. The 15 µVP-P noise performance enables a “rock solid” reading. The auto-zero cycle ensures a zero dis- play reading with a 0V input. The TC7116A and TC7117A feature a precision, low drift internal reference, and are functionally identical to the TC7116/TC7117. A low drift external reference is not normally required with the TC7116A/TC7117A. Package Code Package Temperature Range CPL 40-Pin PDIP 0 °Cto +70°C IJL 40-Pin CERDIP -25 °Cto +85°C CKW 44-Pin PQFP 0 °Cto +70°C CLW 44-Pin PLCC 0 °Cto +70°C 3-1/2 Digit Analog-to-Digital Converters with Hold |
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