TC811 TelCom Semiconductor, TC811 Datasheet
TC811
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TC811 Summary of contents
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... Fluid Flow Rate/Viscosity — Humidity — Position p-p Panel Meters LVDT Indicators Portable Instrumentation Digital Scales 10pA Max Process Monitors Gaussometers Photometers ORDERING INFORMATION Part No. TC811CKW 44-PQFP TC811CPL TYPICAL SEGMENT OUTPUT + V 0.5mA SEGMENT OUTPUT 2mA TC811CPL INTERNAL DIGITAL GROUND INT R INT – ...
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... This represents an improvement of two to four times over similar 3-1/2 digit converters, eliminating the need for a costly, space consuming external reference source. The TC811 limits linearity error to less than one count on both the 200mV and the 2.00V full-scale ranges. Rollover error—the difference in readings for equal magnitude but opposite polarity input signals— ...
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... V INT – 10 100 (BACKPLANE) TC811 = 25 C, unless otherwise noted. A Min Typ Max Unit — ppm/ C — — — — — — — — — ppm/ C — 35 ...
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... TC811 PIN DESCRIPTION Pin No. 40-Pin Plastic DIP Symbol 1 HLDR POL ...
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... Pin Designations Refer to 40-Pin DIP Package) The TC811 is a dual slope, integrating analog-to-digital converter. An understanding of the dual slope conversion technique will aid the user in following the detailed TC811 theory of operation following this section. A conventional dual slope converter measurement cycle has two distinct ...
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... V and V . The differential input signal is then integrated IN IN for a fixed time period which, in the TC811 is 1000 counts (4000 clock periods). The externally set clock frequency is divided by four before clocking the internal counters. The integration time period is: 4000 T = INT ...
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... If V this indicator would reverse. TEST Function (TEST) On the TC811, when TEST is pulled to a logical “HIGH”, all segments are turned “ON”. The display will read “-1888”. During this mode the LCD segments have a constant DC voltage impressed ...
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... Other crystal frequen- cies, from 16kHz to 48kHz, can also be used. Pins 39 and 40 make up the oscillator section of the TC811. Figures 6a and 6b show some typical conversion rate component values. The LCD backplane frequency is derived by dividing the oscillator frequency by 800. Capacitive loading of the LCD may compromise display performance if the oscillator is run much over 48kHz ...
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... The typical range 1.5V. Common-mode voltages are removed from the sys- tem when the TC811 operates from a battery or floating power source (isolated from measured system) and V connected to Analog Common. (see Figure 8) In systems where common-mode voltages exist, the 86dB common-mode rejection ratio minimizes error. Com- mon-mode voltages do, however, affect the integrator out- put level ...
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... TEST (Pin 37) The TEST pin potential is 5V less the V used as the negative power supply connection when inter- facing the TC811 to external CMOS logic. The TEST pin is tied to the internally generated negative logic supply through a 500 resistor. The TEST pin may be used to sink up to 1mA ...
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... DIGIT A/D CONVERTER WITH HOLD AND DIFFERENTIAL REFERENCE INPUTS Liquid Crystal Display Sources Several LCD manufactures supply standard LCD dis- plays to interface with the TC811 3-1/2 digit analog-to-digital converter. Manufacturer Address/Phone Crystaloid 5282 Hudson Dr., Electronics Hudson, OH 44236 216-655-2429 AND 770 Airport Blvd., ...
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... DIGIT A/D CONVERTER WITH HOLD AND DIFFERENTIAL REFERENCE INPUTS + 9V V – TC811 0.7%/°C PTC V + HLDR 9V + 5.6 k 160 – 1N914 TC811 REF 20 k – V REF COMMON HLDR Figure 13. Positive Temperature Coefficient Resistor Temperature Sensor TELCOM SEMICONDUCTOR, INC. – ...