TC7129CKW713 Microchip Technology, TC7129CKW713 Datasheet
TC7129CKW713
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TC7129CKW713 Summary of contents
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... RC network between pins 26 and 28 is not required. © 2006 Microchip Technology Inc. On-Chip LCD Drivers General Description: The TC7129 is a 4-1/2 digit Analog-to-Digital Converter (ADC) that directly drives a multiplexed Liquid Crystal Display (LCD). Fabricated in high-performance, low- power CMOS, the TC7129 ADC is designed specifi- cally for high-resolution, battery-powered digital multi- meter applications ...
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... TC7129CPL BUFF MINUS REF REF COMMON CONTINUITY INT OUT INT LATCH/HOLD DISP REF REF BATT MINUS 11 BUFF REF REF COMMON CONTINUITY INT OUT 44-Pin PLCC REF REF BUFF 34 NC TC7129CLW REF REF 31 COMMON 30 CONTINUITY 29 INT OUT © 2006 Microchip Technology Inc. ...
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... Dissipation ratings assume device is mounted with all leads soldered to printed circuit board. © 2006 Microchip Technology Inc. *Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These ...
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... A — 40 — A — 3 — A Test Conditions V+ to pin 28 Common = +0.1V Common = -0. pin 36 V– DGND = +0. V– V– DISP V+ to V– V pin 27 = High OUT V pin 27 = Low OUT Pins 37, 38, 39 Pins 20, 21 sink/source Pin 27 sink/source © 2006 Microchip Technology Inc. ...
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... Microchip Technology Inc. Symbol OSC1 Input to first clock inverter. OSC3 Output of second clock inverter. ANNUNCIATOR Backplane square wave output for driving annunciators CONT Output to display segments Output to display segments Output to display segments Output to display segments BATT Output to display segments. ...
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... A pull-down for 200 mV scale. Pulled high externally for 2V scale. DP Internal 3 A pull-down. When high, decimal point 2 will be on Internal 3 A pull-down. When high, decimal point 1 will be on. 1 OSC2 Output of first clock inverter. Input of second clock inverter connection. Function © 2006 Microchip Technology Inc. ...
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... This equation gives an oscillator frequency of 120 kHz. A similar calculation gives an optimum frequency of 100 kHz for 50 Hz rejection. © 2006 Microchip Technology Inc. The resistor and capacitor values are not critical; those shown work for most applications. In some situations, the capacitor values may have to be adjusted to compensate for parasitic capacitance in the circuit ...
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... The value must be high enough to offset the effect of stray capacitance at the capacitor terminals. A value of at least recommended 120 Crystal kHz 330 kΩ REF 0.1 µF across the inputs HI) REF – LO) REF ) REF © 2006 Microchip Technology Inc. ...
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... It can be used as a reference for external logic, as explained in Section 4.3 “Connecting to External Logic”, (see Figure 4-1). © 2006 Microchip Technology Inc. + provides an to less than ) forms an 0.1 µ ...
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... The diode between DGND and V DISP have a low turn-on voltage because V exceed 0.3V below DGND TC7129 36 DGND 23 V- External Logic Referenced V+ 24 TC7129 – DGND 23 V– External Logic Referenced (pin 19) can be connected DISP should DISP cannot DISP © 2006 Microchip Technology Inc. ...
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... For 120 kHz frequency and pF, the calculated value The RC oscillator and the crystal oscillator circuits are shown in Figure 4- 270 120 kHz Figure 4-7: Oscillator Circuits. © 2006 Microchip Technology Inc TC7129 DISP 36 DGND V– 4.6 Measuring Techniques Two important techniques are used in the TC7129: ...
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... Note: Shaded area greatly expanded in time and amplitude. Figure 4-10: Integration Waveform. DS21459D-page 12 De-integrate Overshoot due to zero-crossing between clock pulses Integrator Residue Voltage Overshoot caused by comparator delay of 1 clock pulse Clock Pulses DE 1 De-integrate REST X10 DE REST 2 Integrator Residual Voltage X10 DE Zero Integrate 3 © 2006 Microchip Technology Inc. ...
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... DE Integrator voltage is ramped to zero. Counter 3 counts up until zero-crossing to correct reading to 5-1/2 digits. Residue is discarded. © 2006 Microchip Technology Inc. TC7129 4.9 Digital Auto-Zeroing To eliminate the effect of amplifier offset errors, the TC7129 uses a digital auto-zeroing technique. After the input voltage is measured as described above, the measurement is repeated with the inputs shorted internally ...
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... Sequence Counter/Decoder Control Logic Analog Section BUFF INT INT Integrator – 10 – Buffer + 100 pF ZI, X10 REST 500 k TC7129 To Display Driver Annunciator Drive V DISP UR/DP 3 OR/DP 4 REF HI REF LO INT OUT INT IN X10 Comparator Digital Section – Comparator 2 © 2006 Microchip Technology Inc. ...
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... The continuity pin can also be used as an input to drive the continuity annunciator directly from an external source (see Figure 4-13). A schematic of the input/output nature of this pin is also shown in Figure 4-14. © 2006 Microchip Technology Inc. TC7129 IN HI COM IN LO – ...
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... The ANNUNCIATOR DRIVE output (pin square wave, running at the backplane frequency (100 Hz or 83.3 Hz) with a peak-to-peak voltage equal to DGND voltage. Connecting an annunciator to pin 3 turns it on; connecting it to its backplane turns it off (pins 16 © 2006 Microchip Technology Inc. ...
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... Low Battery MINUS 3 3 Figure 4-16: Display Segment Assignments Figure 4-17: Backplane Waveforms. © 2006 Microchip Technology Inc. Continuity Low Battery Continuity Segment Line All Off a Segment Off Off All On Figure 4-18: Typical Display Output Waveforms. TC7129 1 2 Backplane Connections Continuity ...
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... Us er Direction of F eed itch R evers e R eel C omponent Orientation User Direction of Feed Pin 1 P Standard Reel Component Orientation for 713 Suffix Device Carrier Width (W) Pitch (P) Part Per Full Reel Width of C arrier ape W Reel Size 500 13 in © 2006 Microchip Technology Inc. ...
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... Mold Draft Angle Bottom * Controlling Parameter § Significant Characteristic Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010” (0.254mm) per side. JEDEC Equivalent: MO-011 Drawing No. C04-016 © 2006 Microchip Technology Inc INCHES* MIN ...
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... Microchip Technology Inc. ...
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... Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed .010" (0.254mm) per side. BSC: Basic Dimension. Theoretically exact value shown without tolerances. See ASME Y14.5M REF: Reference Dimension, usually without tolerance, for information purposes only. See ASME Y14.5M JEDEC Equivalent: MO-112 AA-1 Drawing No. C04-119 © 2006 Microchip Technology Inc CHAMFER VARIES ...
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... TC7129 NOTES: DS21459D-page 22 © 2006 Microchip Technology Inc. ...
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... I = -25°C to +85°C Package 40-Pin PDIP KW = 40-Pin PQFP LW = 44-Pin PLCC JL = 40-Pin CDIP Taping Direction: 713 = Standard Taping © 2006 Microchip Technology Inc. TC7129 . Examples: a) TC7129CPL: 40-Pin PDIP b) TC7129CKW713: 44-Pin PQFP Tape and Reel c) TC7129CLW: 44-Pin PLCC DS21459D-page 23 ...
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... TC7129 NOTES: DS21459D-page 24 © 2006 Microchip Technology Inc. ...
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... To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions. © 2006 Microchip Technology Inc. CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • Distributor or Representative • ...
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... What deletions from the document could be made without affecting the overall usefulness there any incorrect or misleading information (what and where)? 7. How would you improve this document? DS21459D-page 26 Total Pages Sent ________ FAX: (______) _________ - _________ N Literature Number: DS21459D © 2006 Microchip Technology Inc. ...
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... PowerMate, PowerTool, REAL ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. ...
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