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TC7116A датащи(PDF) 1 Page - Microchip Technology |
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TC7116A датащи(HTML) 1 Page - Microchip Technology |
1 / 26 page 2002-2012 Microchip Technology Inc. DS21457D-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 • 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 Liquid Crystal Displays (LCDs) and includes a back- plane driver. The TC7117A drives common anode Light Emitting Diode (LED) displays directly with an 8mA drive current per segment. These devices incorporate a display hold (HLDR) function. 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- is tied internally to analog common 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 input imped- ance. The 15 V P-P noise performance enables a “rock solid” reading. The auto-zero cycle ensures a zero display 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 C to +70C IJL 40-Pin CERDIP -25 C to +85C CKW 44-Pin PQFP 0 C to +70C CLW 44-Pin PLCC 0 C to +70C 3-1/2 Digit Analog-to-Digital Converters with Hold |
Аналогичный номер детали - TC7116A |
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Аналогичное описание - TC7116A |
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