TC7107 TelCom, TC7107 Datasheet
TC7107
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TC7107 Summary of contents
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... DIGIT A/D CONVERTERS FEATURES Internal Reference with Low Temperature Drift TC7106/7 ....................................... 80ppm/ C Typical TC7106A/7A .................................. 20ppm/ C Typical Drives LCD (TC7106) or LED (TC7107) Display Directly Guaranteed Zero Reading With Zero Input Low Noise for Stable Display Auto-Zero Cycle Eliminates Need for Zero Adjustment True Polarity Indication for Precision Null ...
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... Exceeded 95% of Time) Leakage Current @ Input Zero Reading Drift Scale Factor Temperature Coefficient Supply Current (Does Not Include LED Current For TC7107/A) 3-184 Analog Input Voltage (either input) (Note 1) ......... V Reference Input Voltage (either input) ................. V Clock Input ....................................................... GND to V Power Dissipation (Note – ...
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... NOTES: 1. Input voltages may exceed the supply voltages provided the input current is limited to 100 A. 2. Dissipation rating assumes device is mounted with all leads soldered to printed circuit board. 3. Unless otherwise noted, specifications apply to both the TC7106/A and TC7107 circuit of Figure 1. 4. Refer to “Differential Input” discussion. ...
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... DIGIT A/D CONVERTERS REVERSE PIN CONFIGURATION 1 TC7106AIJL TC7107AIJL 10 100 1000's 21 POL (MINUS SIGN ...
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... AB Activates both halves of the 1 in the thousands display. 4 POL Activates the negative polarity display. BP LCD Backplane drive output (TC7106A). GND Digital ground (TC7107A). G Activates the G section of the hundreds display Activates the A section of the hundreds display Activates the C section of the hundreds display. ...
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... GENERAL THEORY OF OPERATION DUAL SLOPE CONVERSION PRINCIPLES (All Pin Designations Refer to the 40-Pin DIP) The TC7106A and TC7107A are dual slope, integrating analog-to-digital converters. An understanding of the dual slope conversion technique will aid in following the detailed operation theory. The conventional dual slope converter measurement cycle has two distinct phases: • ...
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... LCD segment. This insures long LCD display life. The polarity segment driver is “ON” for negative analog inputs – V and V are reversed, this indicator will reverse TC7106 TC7106A TC7107 TC7107A 2 + – and V . The differential input 1000 f OSC 3 – ...
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TC7106A C REF R INT + + – – C REF V REF V REF C REF V BUFF – 10 A/Z A (–) (+) INT LOW ...
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... This supply is made stiff to absorb the large capacitive currents when the backplane voltage is switched. DIGITAL SECTION (TC7107A) Figure 5 shows the TC7107A designed to drive common anode LEDs identical to the TC7106A except that the regulated supply and backplane drive have been eliminated and the segment drive is typically 8mA ...
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... TC7107A C REF R INT + + – – C REF V REF V REF C REF V BUFF – A/Z A (–) (+) INT LOW – A/Z TEMPCO V REF + 32 DE (+) DE (–) ANALOG V + – 3.0V COMMON AZ & – INT – V TYPICAL SEGMENT OUTPUT + V 0.5mA SEGMENT OUTPUT 8mA INTERNAL DIGITAL GROUND ...
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... F analog common will normally be used to supply the convert- er's reference. This potential is stable whenever the supply potential is greater than approximately 7V. In applications where an externally-generated reference voltage is desired, refer to Figure 7. TC7106 TC7106A TC7107 TC7107A 0. OSC RC of 48kHz 100pF nominally. OSC is divided by four to generate the TC7106A OSC by 800 ...
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... The typical range – –1 Common-mode voltages are removed from the system when the TC7106A/TC7107A operates from a battery or floating power source (isolated from measured – system) and V is connected to analog common (V IN See Figure 8. ...
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... Analog common the industry standard circuits allow users to upgrade old systems and design new systems without external voltage references. External R and C values do not need changed. Figure 11 shows analog common supplying the necessary voltage reference for the TC7106A/TC7107A. + – and V inputs 200 IN ...
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... TC7107CPL. Since a typical LED has 1.8 volts across it at 7mA, and its common anode is con- nected to +5V, the TC7107A output is at 3.2V (point A on Figure 13). Maximum power dissipation is 8.1mA x 3. segments = 622mW. ...
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... digits with and without decimal point annunciators for the TC7107A. 20 Manufacturer Hewlett-Packard Components AND TC7106 TC7106A TC7107 TC7107A Address/Phone Part Numbers 5282 Hudson Dr. C5335, H5535, Hudson, OH 44236 T5135, SX440 216/655-2429 720 Palomar Ave. FE 0201,0701 Sunnyvale, CA 94086 FE 0203, 2201 408/523-8200 FE 0501 3415 Kashikawa St ...
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... TC7106 TC7106A TC7107 TC7107A Decimal Point and Annunciator Drive The TEST pin is connected to the internally-generated digital logic supply ground through a 500 TEST pin may be used as the negative supply for external CMOS gate segment drivers. LCD display annunciators for decimal points, low battery indication, or function indication may be added without adding an additional supply ...
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... Figure 18. 3 1/2 Digit True RMS AC DMM + – – TC7106A 0.7 REF PTC – V REF COMMON Figure 20. Positive Temperature Coefficient Resistor TC7106 TC7106A TC7107 TC7107A + – 24k TC7106A REF – REF 32 ANALOG COMMON 1M 10 0.01 ...
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... C TEMPERATURE DEPENDENT 1.3k OUTPUT Figure 21. Integrated Circuit Temperature Sensor 22k 0.01 F TC7107A + – 9V – Figure 23. TC7107A Internal Reference (200mV Full-Scale, 3-1/2 DIGIT A/D CONVERTERS REF TC7106A 50k V – REF 2.00V V – 50k COMMON – PIN 1 SET V REF = 100mV ...
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... TC7107A 0. 47k DISPLAY Figure 26. TC7107A With a 1.2V External Band-Gap Reference. – (V Tied to Common.) IN TELCOM SEMICONDUCTOR, INC LOGIC GND TC7106A TC7106A – V TC7107A 21 Figure 25. TC7106A/TC7107A: Recommended Component Values for 2.00V Full-Scale 10k + V TC04 + ...