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TC820

Microchip Technology
Part Number TC820
Manufacturer Microchip Technology
Description 3-3/4 Digit A/D Converter
Published Apr 23, 2005
Detailed Description Obsolete Device TC820 3-3/4 Digit A/D Converter with Frequency Counter and Logic Probe Features • Multiple Analog Mea...
Datasheet PDF File TC820 PDF File

TC820
TC820

Overview
Obsolete Device TC820 3-3/4 Digit A/D Converter with Frequency Counter and Logic Probe Features • Multiple Analog Measurement System - Digit A/D Converter - Frequency Counter - Logic Probe • Low Noise A/D Converter: - Differential Inputs: (1 pA Bias Current) - On-Chip 50 ppm/°C Voltage Reference • Frequency Counter: - 4 MHz Maximum Input Frequency - Auto-Ranging Over Four Decade Range • Logic Probe: - Two LCD Annunciators - Buzzer Driver • 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 44-Lead PLCC Packages 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 frequency counter and logic probe into a single 44-pin surface 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.
© 2007 Microchip Technology Inc.
DS21476C-page 1 TC820 Package Type: 44-Pin PLCC AGD3 HFE3 BC4P3 AGD4 L-E4 VDD OSC3 OSC2 OSC1 EOC/HOLD VINT 6 5 4 3 2 1 44 43 42 41 40 BC3P2 7 OFE2 8 39 CAZ 38 VBUFF AGD2 9 BC2P1 10 37 VIN+ 36 VIN- PKFE1 11 AGD1 12 BP1BT 13 TC820CLW 35 VREF34 VREF+ 33 CREF- 40-Pin PDIP BP3 14 32 CREF+ Segments L-E4 1 BP2 15 BP1 16 31 COM 30 VSS Segments AGD4 2 Segments BC4P3 3 VDISP 17 29 OR Segments HFE3 4 18 19 20 21 22 23 24 25 26 27 28 Segments AGD3 5 Segments BC3P2 6 Segments OFE2 7 40 VDD 39 OSC3 38 OSC2 37 OSC1 36 VINT 35 CAZ 34 VBUFF DGND ANNUNC LOGIC RANGE/FREQ DP0/LO DP1/HI BUZOUT BUZIN FREQ/VOLTS PKHOLD UR 44-Pin...


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