TC820CLW713 Microchip Technology, TC820CLW713 Datasheet

IC ADC 3 3/4DGT LGC PROBE 44PLCC

TC820CLW713

Manufacturer Part Number
TC820CLW713
Description
IC ADC 3 3/4DGT LGC PROBE 44PLCC
Manufacturer
Microchip Technology
Datasheet

Specifications of TC820CLW713

Display Type
LCD
Configuration
7 Segment + 2 Annunciators
Digits Or Characters
A/D 3.75 Digits
Current - Supply
1mA
Voltage - Supply
9V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Request inventory verification / Request inventory verification
Interface
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
TC820CLW713
Manufacturer:
Microchip Technology
Quantity:
10 000
Features
• Multiple Analog Measurement System
• Low Noise A/D Converter:
• Frequency Counter:
• Logic Probe:
• 3-3/4 Digit Display with Over Range Indicator
• LCD Display Driver with Built-in Contrast Control
• Data Hold Input for Comparison Measurements
• Low Battery Detect with LCD Annunciator
• Under Range and Over Range Outputs
• On-Chip Buzzer Driver with Control Input
• 40-Lead Plastic DIP, 44-Lead Plastic Flat Pack, or
© 2007 Microchip Technology Inc.
- Digit A/D Converter
- Frequency Counter
- Logic Probe
- Differential Inputs: (1 pA Bias Current)
- On-Chip 50 ppm/°C Voltage Reference
- 4 MHz Maximum Input Frequency
- Auto-Ranging Over Four Decade Range
- Two LCD Annunciators
- Buzzer Driver
44-Lead PLCC Packages
3-3/4 Digit A/D Converter with Frequency Counter
and Logic Probe
General Description
The TC820 is a 3-3/4 digit, multi-measurement system
especially suited for use in portable instruments. It
integrates a dual slope A/D converter, auto-ranging fre-
quency counter and logic probe into a single 44-pin sur-
face mount, or 40-pin through hole package. The
operates from a single 9V input voltage (battery) and
features a built-in battery low flag. Function and
decimal point selection are accomplished with simple
logic inputs designed for direct connection to an
external microcontroller or rotary switch.
Obsolete Device
TC820
DS21476C-page 1

Related parts for TC820CLW713

TC820CLW713 Summary of contents

Page 1

... Under Range and Over Range Outputs • On-Chip Buzzer Driver with Control Input • 40-Lead Plastic DIP, 44-Lead Plastic Flat Pack, or 44-Lead PLCC Packages © 2007 Microchip Technology Inc. Obsolete Device and Logic Probe General Description The TC820 is a 3-3/4 digit, multi-measurement system especially suited for use in portable instruments ...

Page 2

... C BP1 BUFF DGND ANNUNC LOGIC RANGE/FREQ REF DP0/LO REF REF REF 25 COM 40-Pin PDIP OSC3 3 38 OSC2 37 OSC1 INT BUFF TC820CPL REF REF REF REF 27 COM PKHOLD 24 17 FREQ/VOLTS 18 23 BUZIN 19 22 BUZOUT 21 20 DP1/HI © 2007 Microchip Technology Inc. ...

Page 3

... Common Low Batt Detect V DD A/D Control Under Range Over Range Range Frequency V SS DGND UR OR © 2007 Microchip Technology Inc. Triplex LCD Logic High Over Range PKHold Logic Low Annunciator Drive Clock Triple LCD Oscillator Drivers Peak Hold Comparator Low ...

Page 4

... Common and COM — 25 kΩ Between Common and V DD 0°C ≤ T ≤ +70°C ppm/°C A -40°C ≤ T ≤ +85°C — A — 0°C ≤ T ≤ +70°C — A -40°C ≤ T ≤ +85°C — A © 2007 Microchip Technology Inc. ...

Page 5

... Input voltages may exceed the supply voltages provided that input current is limited to ±100 µA. Current above this value may result in invalid display readings, but will not destroy the device if limited to ±1 mA. 2: Dissipation ratings assume device is mounted with all leads soldered to printed circuit board. © 2007 Microchip Technology Inc +25°C SS ...

Page 6

... None 0 1 DP1 1 0 DP2 1 1 DP3 will turn on the "high" LCD segment. There is an internal 5 μ may also be used to DISP DISP . DD , the converter is in Logic mode. The DD , the integration time DD turns the buzzer on. BUZIN is logically © 2007 Microchip Technology Inc. ...

Page 7

... OSC3 © 2007 Microchip Technology Inc. Description Voltage or frequency measurement select input. When unconnected, or connected VOLTS to DGND, the A/D converter function is active. When connected to V frequency counter function is active. This pin has an internal 5 μA pull-down to DGND. , the converter will only update the display new conversion value is greater than the preceding value ...

Page 8

... DEINT input voltage ( COMPETITIVE EVALUATION TC820 7106 Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No Yes No "OL" "1" Yes No Triplexed Direct 3-1, the unknown input signal to be © 2007 Microchip Technology Inc. ...

Page 9

... Interfering signals, with frequency components at multiples of the averaging (integrating) period, will be attenuated (Figure 3-2). Integrating ADCs commonly operate with the signal integration period set to a multiple of the 50/60Hz power line period. © 2007 Microchip Technology Inc Measurement Period 20 t DEINT 10 ...

Page 10

... TC820 "acquisition time" will not be a limitation. If true peak detection is required, a simple circuit will suffice. See the applications section for details. MEASUREMENT CYCLE PHASE LENGTH Counts 1500 2000 1 to 4001 499 to 4499 = 2000 counts. OSC is the clock oscillator OSC , DD © 2007 Microchip Technology Inc. ...

Page 11

... RANGE/ FREQ ( ÷1, 10, 100, 1000) FIGURE 3-3: TC820 Counter Operation. © 2007 Microchip Technology Inc. The frequency counter derives its time-base from the clock oscillator. The counter time-base is: EQUATION 3-5: Thus, the counter will operate with a 1-second time- base when a 40 kHz oscillator is used. The frequency counter accuracy is determined by the oscillator accuracy ...

Page 12

... Logic Probe Simplified Schematic. DS21476C-page 12 DP3 DP2 DP1 f IN Decimal Point 0Hz - 3999Hz DP3 4kHz - 39.99kHz DP2 40kHz - 399.9kHz DP1 400kHz NONE TC820 CMOS Logic Levels DP0/LO LCD Drivers DP1/HI LOGIC LCD High Low Disable A/D Converter To Buzzer © 2007 Microchip Technology Inc. ...

Page 13

... The differential reference inputs permit ratiometric measurements and simplify interfacing with sensors, such as load cells and temperature sensors. © 2007 Microchip Technology Inc. To prevent rollover type errors from being induced by large Common mode voltages, C compared to stray node capacitance. A 0.1 µF capacitor is typical ...

Page 14

... Drive BP1 BP2 BUF AZ INT OSC1 TC820 Analog OSC2 Common REF REF DD SS OSC3 Input Buffer – – + Integrator – Where: 4000 T = Integration Time = I F OSC C = Integration Capacitor Integration Resistor I LCD BP3 = Analog Common ≠ COM IN © 2007 Microchip Technology Inc. ...

Page 15

... F OSC this input has CMOS input levels (V DGND +1.5V), an external buffer is recommended. © 2007 Microchip Technology Inc. When the TC820 analog-to-digital converter function is selected, connecting RANGE/FREQ to V the integration time by 10. Therefore, the RANGE/ FREQ input can be used to perform a 10:1 range change without changing external components ...

Page 16

... P-P separate V DISP variable or temperature compensated LCD drive volt- age. See the applications information for suggested circuits. (Figure 4-2). TC820 * * * *74HC132 Generating Under Range is connected DISP . The 44-pin package includes a input for applications requiring a © 2007 Microchip Technology Inc. ...

Page 17

... FIGURE 5-2: Powering the Low Voltage Battery. © 2007 Microchip Technology Inc. 5.2 Digital Ground (DGND) Digital ground is generated from an internal zener diode (Figure DGND is the internal supply voltage for the digital section of the TC820. DGND will sink a minimum ...

Page 18

... A good quality, low leakage capacitor (such as Mylar) should be used. TC820 OSC2 OSC3 A/D ÷ 2 Counter ÷ Buzzer 8 LCD ÷ Backplane 240 Driver Counter ÷ 40,000 Time-Base System Clock Generation has some AZ REF . A 0.1 µF REF © 2007 Microchip Technology Inc. ...

Page 19

... INT 5.7 Reference Voltage Selection A full-scale reading (4000 counts for TC820) requires the input signal be twice the reference voltage. See Reference Voltage Selection, Table 5-1 © 2007 Microchip Technology Inc. TABLE 5-1: INT Full Scale Input Voltage (V ) (Note 1) FS 200 mV ...

Page 20

... TC820 1µ FREQ/VOLTS RANGE/FREQ 74HC14 DGND Frequency Counter External TC820 + LOGIC DP1/ DP0/LO DGND *74HC14 Simple External Logic Probe Figure 5-11 shows a © 2007 Microchip Technology Inc. ...

Page 21

... The LCD can include decimal points, polarity sign, and annunciators for over range, peak hold, high and low logic levels, and low battery. © 2007 Microchip Technology Inc. Table 5-2 shows the assignment of the display segments to the backplanes and segment drive lines. ...

Page 22

... No. 312, Sec, 4, Jen Ai Rd. Taipei, Taiwan R.O.C. Phone: (02) 754-2677 Fax: 886-2-708-4124 Part #: QRT-38-40.0kHz LCD. ) DISP – DD DISP . P-P . Figure 5-16 shows TC820 circuits DISP and V . The DD DISP should have a low turn DISP cannot exceed 0.3V below DISP © 2007 Microchip Technology Inc. ...

Page 23

... TL071 1N5817 75kΩ Note: Pin numbers shown are for 44-pin flat package. FIGURE 5-16: Temperature Compensating Circuits. © 2007 Microchip Technology Inc. V+ 39kΩ 39 200kΩ 20kΩ TC820 11 V DISP 12 DGND 18kΩ TC820 ...

Page 24

... In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. DS21476C-page 24 Example: M TC820CLW e 3 ^^0743256 Example TC820CPL^^ 0743256 *h Example: M TC820CKW e ^^0743256 © 2007 Microchip Technology Inc. ...

Page 25

... NOTE © 2007 Microchip Technology Inc. CH2 x 45° CH1 x 45° CH3 x 45° TC820 A1 A3 DS21476C-page 25 ...

Page 26

... TC820 N NOTE DS21476C-page © 2007 Microchip Technology Inc. c ...

Page 27

... NOTE β © 2007 Microchip Technology Inc NOTE 2 φ TC820 α A2 DS21476C-page 27 ...

Page 28

... TC820 NOTES: DS21476C-page 28 © 2007 Microchip Technology Inc. ...

Page 29

... Updated Package Marking Information 3. Added Package Outline Drawings 4. Added Appendix A - History page 5. Added Product Identification System page Revision B (May 2002) The following is the list of modifications: 1. Undocumented Changes Revision A (April 2002) • Original Release of this Document. © 2007 Microchip Technology Inc. TC820 DS21476C-page 29 ...

Page 30

... TC820 NOTES: DS21476C-page 30 © 2007 Microchip Technology Inc. ...

Page 31

... Temperature Range C = 0°C to +70°C Package LW = Plastic Leaded Chip Carrier (PLCC), 44-lead PL = Plastic DIP, (600 mil Body), 40-lead KW = Plastic Metric Quad Flatpack, (MQFP), 44-lead © 2007 Microchip Technology Inc. TC820 . Examples: a) TC820CLI: 3-3/4 A/D Converter, 44LD PLCC package. b) TC820CPI: 3-3/4 A/D Converter, 40LD PDIP package ...

Page 32

... TC820 NOTES: DS21476C-page 32 © 2007 Microchip Technology Inc. ...

Page 33

... PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, 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. ...

Page 34

... Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350 © 2007 Microchip Technology Inc. EUROPE Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 ...

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