TC7136 Microchip, TC7136 Datasheet
TC7136
Available stocks
Related parts for TC7136
TC7136 Summary of contents
Page 1
... 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, ...
Page 2
... (Backplane) (Backplane Internal Connection 44-Pin PQFP TC7136CKW TC7136ACKW 28 BP POL 40-Pin PDIP Reverse Pin Configuration ...
Page 3
... 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 ...
Page 4
... TC7136/TC7136A Functional Block Diagram DS21461B-page 4 2002 Microchip Technology Inc. © ...
Page 5
... A 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°C to +150°C TC7136 AND TC7136A ELECTRICAL SPECIFICATIONS Electrical Characteristics 9V CLK Symbol Parameter Input Zero Input Reading ...
Page 6
... 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 ...
Page 7
... 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. ...
Page 8
... 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 ...
Page 9
... DETAILED DESCRIPTION (All Pin Designations Refer to 40-Pin PDIP.) 3.1 Dual Slope Conversion Principles The TC7136 dual slope, integrating analog-to- digital converter. An understanding of the dual slope conversion technique will aid in following detailed TC7136/A operational theory. The conventional dual slope converter measurement cycle has two distinct phases (see Figure 3-1). ...
Page 10
... V + and V -. The differential IN IN input signal is integrated for a fixed time period. The TC7136/A signal integration period is 1000 clock peri- ods or counts. The externally set clock frequency is divided by four before clocking the internal counters. The integration time period is: EQUATION 4-1: 4 ...
Page 11
... V - are reversed, this indicator would IN IN reverse. On the TC7136/A, when the TEST pin is pulled to V+, all segments are turned ON. The display reads -1888. During this mode, the LCD segments have a constant DC voltage impressed. Note: Do not leave the display in this mode for more than several minutes ...
Page 12
... 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 - ...
Page 13
... To prevent rollover type errors being induced by large (see Common mode voltages pared to stray node capacitance. The TC7136/A offers a significantly improved analog common temperature coefficient. This potential provides a very stable volt- age, suitable for use as a voltage reference. The temperature coefficient of analog common is typically 35ppm/° ...
Page 14
... V The analog common pin serves to set the analog sec- tion reference, or common point. The TC7136A is spe- cifically designed to operate from a battery any measurement system where input signals are not refer- enced (float), with respect to the TC7136A power source. The analog common potential of V+ – ...
Page 15
... 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 ...
Page 16
... 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. © ...
Page 17
... 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) ...
Page 18
... 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) ...
Page 19
... 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 ...
Page 20
... 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 ...
Page 21
... 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, ...
Page 22
... Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea Microchip Technology Korea 168-1, Youngbo Bldg. 3 Floor Samsung-Dong, Kangnam-Ku Seoul, Korea 135-882 Tel: 82-2-554-7200 Fax: 82-2-558-5934 Singapore Microchip Technology Singapore Pte Ltd. 200 Middle Road #07-02 Prime Centre Singapore, 188980 Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan Microchip Technology Taiwan 11F-3, No. 207 ...