tc7136a Microchip Technology Inc., tc7136a Datasheet

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... Microchip Technology Inc.  TC7136/TC7136A General Description The TC7136 and TC7136A are low power, 3-1/2 digit with liquid crystal display (LCD) drivers and analog-to- digital converters. These devices incorporate an "inte- grator output zero" phase, which enables over range recovery. The performance of existing TC7126, ...

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... PDIP Reverse Pin Configuration 1 TC7136RCPL TC7136ARCPL 10 100 ...

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... Analog 0.01µF Input – 0.47 180kΩ µF 0.15µF 2002 Microchip Technology Inc.  TC7136/TC7136A 0.1µ REF REF 31 9-19 Segment 22-25 Drive TC7136 20 TC7136A 30 POL Minus Sign 21 BP ANALOG 32 COMMON 240kΩ BUFF REF REF 27 ...

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... TC7136/TC7136A Functional Block Diagram DS21461B-page 4 2002 Microchip Technology Inc.  ...

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... Plastic DIP ................................................... 1.23W Plastic Quad Flat Package .......................... 1.00W PLCC ........................................................... 1.23W Operating Temperature Range: C Devices.......................................... 0°C to +70°C I Devices ........................................ -25°C to +85°C Storage Temperature Range .............. -65° +150° C TC7136 AND TC7136A ELECTRICAL SPECIFICATIONS Electrical Characteristics 9V CLK Symbol Parameter Input ...

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... TC7136/TC7136A TC7136 AND TC7136A ELECTRICAL SPECIFICATIONS (CONTINUED) Electrical Characteristics 9V CLK Symbol Parameter Analog Common V Analog Common Temperature CTC Coefficient TC7136A TC7136 TC7136A TC7136 V Analog Common Voltage C LCD Drive V LCD Segment Drive Voltage SD V LCD Backplane Drive Voltage BD Power Supply ...

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... COMMON 33 (8) C REF 2002 Microchip Technology Inc.  TC7136/TC7136A Description Positive supply voltage. Activates the D section of the units display. Activates the C section of the units display. Activates the B section of the units display. Activates the A section of the units display. Activates the F section of the units display. ...

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... TC7136/TC7136A TABLE 2-1: PIN DESCRIPTION (CONTINUED) Pin Number (40-Pin PDIP) (Reverse) Symbol Normal 34 (7) C REF 35 (6) V REF (5) V REF 36 (4) TEST 37 (3) OSC3 38 (2) OSC2 39 (1) OSC1 DS21461B-page 8 Description + A 0.1µF capacitor is used in most applications large Common mode voltage exists (for example, the V ...

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... Signal integration time (fixed Reference voltage integration time RI (variable) For a constant EQUATION 3- ------- - 2002 Microchip Technology Inc.  TC7136/TC7136A FIGURE 3-1: Analog Input Signal REF Voltage Polarity Control ). Fixed Variable RI Signal Reference Integrate Integrate Time Time FIGURE 3- ...

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... ANALOG SECTION In addition to the basic integrate and de-integrate dual slope cycles discussed above, the TC7136 and TC7136A designs incorporate an "integrator output zero cycle" and an "auto-zero cycle." These additional cycles ensure the integrator starts at 0V (even after a severe over range conversion) and that all offset volt- age errors (buffer amplifier, integrator and comparator) are removed from the conversion ...

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... Reference integrate 2000 counts 4. Zero integrator 640 counts The TC7136 is a drop-in replacement for the TC7126 and ICL7126. The TC7136A offers a greatly improved internal reference temperature coefficient. Minor com- ponent value changes are required to upgrade existing designs and improve the noise performance. ...

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... A compen- sating offset voltage can be applied between analog common and V between V + and analog common selected from the OSC 0. OSC RC is ÷ generate the TC7136A's inter- by 800. V REF 100mV REF 400mV. Rather is not equal to zero. This is common IN - ...

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... Microchip Technology Inc.  TC7136/TC7136A V+ – 1V. Common mode voltages are removed from the system when the TC7136A operates from a battery or floating power source (isolated from measured system), Common mode voltage removed in battery operation with V is connected to analog common (V Figure 7-1) ...

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... V- > 7V), analog common is a very stable poten- tial with excellent temperature stability (typically 35ppm/°C for TC7136A. This potential can be used to generate the TC7136A's reference voltage. An external voltage reference will be unnecessary in most cases, because of the 35ppm/°C temperature coefficient. See Section 7 ...

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... TYPICAL APPLICATIONS 8.1 Liquid Crystal Display Sources Several manufacturers supply standard LCDs to inter- face with the TC7136A 3-1/2 digit analog-to-digital converter. Representative Manufac. Address/Phone Part Numbers* Crystaloid 5282 Hudson Dr. C5335, H5535, Electronics Hudson, OH 44236 T5135, SX440 216-655-2429 AND 720 Palomar Ave. FE 0201, 0501 ...

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... V REF COMMON DS21461B-page 16 FIGURE 8-4: 5.6kΩ 1N4148 LCD 0.7%/°C R PTC + 9V V- TC7136 TC7136A + - POSITIVE TEMPERATURE COEFFICIENT RESISTOR TEMPERATURE SENSOR + 9V 160kΩ 20kΩ TC7136 TC7136A REF 20kΩ REF COMMON 2002 Microchip Technology Inc.  ...

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... PIN 1 Carrier Tape, Number of Components Per Reel and Reel Size Package 44-Pin PLCC Note: Drawing does not represent total number of pins. 2002 Microchip Technology Inc.  TC7136/TC7136A User Direction of Feed PIN 1 P Standard Reel Component Orientation for TR Suffix Device Carrier Width (W) ...

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... TC7136/TC7136A 9.3 Package Dimensions 40-Pin PDIP (Wide) 2.065 (52.45) 2.027 (51.49) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .070 (1.78) .090 (2.29) .045 (1.14) 44-Pin PLCC .695 (17.65) .685 (17.40) .656 (16.66) .650 (16.51) .656 (16.66) .650 (16.51) .695 (17.65) .685 (17.40) DS21461B-page 18 PIN 1 .555 (14.10) .530 (13.46) .040 (1.02) .020 (0.51) .015 (0.38) .008 (0.20) .022 (0.56) .015 (0.38) PIN 1 .050 (1.27) TYP. .180 (4.57) .165 (4.19) ...

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... Package Dimensions (Continued) 44-Pin PQFP PIN 1 .018 (0.45) .012 (0.30) .031 (0.80) TYP. .398 (10.10) .390 (9.90) .557 (14.15) .537 (13.65) 2002 Microchip Technology Inc.  TC7136/TC7136A 7° MAX. .009 (0.23) .005 (0.13) .398 (10.10) .390 (9.90) .557 (14.15) .537 (13.65) .096 (2.45) MAX. Dimensions: inches (mm) .041 (1.03) .026 (0.65) .010 (0.25) TYP. .083 (2.10) .075 (1.90) DS21461B-page 19 ...

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... TC7136/TC7136A SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom- mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. Your local Microchip sales office 2 ...

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... Microchip. No licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. 2002 Microchip Technology Inc.  TC7136/TC7136A Trademarks The Microchip name and logo, the Microchip logo, FilterLab microID, MPLAB, PIC, PICmicro, PICMASTER, ...

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... Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883 United Kingdom Arizona Microchip Technology Ltd. 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44 118 921 5869 Fax: 44-118 921-5820 03/01/ 2002 Microchip Technology Inc.  ...