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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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TC818A 데이터시트(PDF) 1 Page - Microchip Technology |
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TC818A 데이터시트(HTML) 1 Page - Microchip Technology |
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1 / 24 page  © 2002 Microchip Technology Inc. DS21475B-page 1 TC818A Features • Auto-Ranging Analog-to-Digital Converter with 3-1/2 Digit Display • Annunciator Outputs Permit Customizing of LCD • Auto-Range Operation for AC and DC Voltage and Resistance Measurements • Two User Selected AC/DC • Current Ranges: 20mA and 200mA • 22 Operating Ranges: 9 DC/AC Voltage •4 AC/DC Current • 9 Resistance and Low Power Ohms • Display Hold Function • 3-1/2 Digit Resolution in Auto-Range Mode: 1/2000 • Extended Resolution in Manual Range Mode: 1/3000 • Internal AC-to-DC Conversion Op Amp • Triplex LCD Drive for Decimal Points, Digits, • Bar Graphs, and Annunciators • Continuity Detection and Piezoelectric Transducer Driver • Low Drift Internal Reference: 75ppm/°C • 9V Battery Operation: 10mW • Low Battery Detection and LCD Annunciator Device Selection Table General Description The TC818A is an integrating analog-to-digital con- verter (ADC) with a 3-1/2 digit numeric LCD driver, automatic ranging, and single 9V battery operation. The numeric display provides 0.05% resolution and a full set of annunciators that spell out the TC818A's many operating modes. Automatic range selection is provided for both voltage (DC and AC) and ohms (high and low power) measure- ments. Expensive and bulky mechanical range switches are not required. Five full scale ranges are available, with automatic selection of external volt/ohm attenuators over a 1 to 10,000 range. Two current ranges, 20mA and 200mA, can be manually selected. The auto-range feature can be bypassed, allowing input attenuator selection through a single line input. During Manual mode operation, resolution is extended to 3000 counts full scale. Extended resolution is also available during 2000k Ω and 2000V full scale auto- range operation. The extended range operation is indi- cated by a flashing 1 MSD and by the fully extended bar graph. The TC818A includes an AC-to-DC converter for AC voltage and current measurements. Only external diodes/resistors/capacitors are required. Other fea- tures include a Memory mode, low battery detection, display HOLD input, and continuity buzzer driver. The 3-1/2 digit numeric display includes a full set of annunciators. Decimal points are adjusted as auto- matic or manual range changes occur, and Voltage, Current, and Ohms Operating modes are displayed. Additional annunciators are activated for manual, auto, memory, HOLD, AC, low power ohms, and low battery conditions. The TC818A is available in a surface mounted 64-pin flat package. Combining a numeric display driver, sin- gle 9V battery operation, internal range switching, and compact surface mounting, the TC818A is ideal for advanced portable instruments. Part Number Package Operating Temperature Range TC818ACBU 64-Pin PQFP 0 °Cto +70°C Auto-Ranging Analog-to-Digital Converter with 3-1/2 Digit Display |
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