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TC7107 데이터시트(PDF) 1 Page - Microchip Technology |
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TC7107 데이터시트(HTML) 1 Page - Microchip Technology |
1 / 34 page © 2008 Microchip Technology Inc. DS21455D-page 1 TC7106/A/TC7107/A Features: • Internal Reference with Low Temperature Drift: - TC7106/TC7107: 80 ppm/°C (Typical) - TC7106A/TC7107A: 20 ppm/°C (Typical) • Drives LCD (TC7106) or LED (TC7107) Display Directly • Zero Reading with Zero Input • Low Noise for Stable Display • Auto-Zero Cycle Eliminates Need for Zero Adjustment • True Polarity Indication for Precision Null Applications • Convenient 9V Battery Operation (TC7106A) • High-Impedance CMOS Differential Inputs: 1012 Ω • Differential Reference Inputs Simplify Ratiometric Measurements • Low-Power Operation: 10 mW Applications: • Thermometry • Bridge Readouts: Strain Gauges, Load Cells, Null Detectors • Digital Meters: Voltage/Current/Ohms/Power, pH • Digital Scales, Process Monitors • Portable Instrumentation General Description: The TC7106A and TC7107A 3-1/2 digit direct display drive Analog-to-Digital Converters allow existing TC7106/TC7107 based systems to be upgraded. Each device has a precision reference with a 20 ppm/°C maximum temperature coefficient. This represents a 4 to 7 times improvement over similar 3-1/2 digit converters. Existing TC7106 and TC7107 based systems may be upgraded without changing external passive component values. The TC7107A drives common anode light emitting diode (LED) displays directly with 8 mA per segment. A low cost, high resolution indicating meter requires only a display, four resistors, and four capacitors. The TC7106A low-power drain and 9V battery operation make it suitable for por- table applications. The TC7106A/TC7107A 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 1 pA leakage current and a 1012 Ω input impedance. The differential reference input allows ratiometric measurements for ohms or bridge transducer measurements. The 15 µVP–P noise performance ensures a “rock solid” reading. The auto- zero cycle ensures a zero display reading with a zero volts input. 3-1/2 Digit Analog-to-Digital Converters |
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