TC820 Datasheet, PDF (1/28 Pages) TelCom Semiconductor, Inc – 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE

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: (1pA Bias Current)
- On-Chip 50ppm/°C Voltage Reference
• Frequency Counter:
- 4MHz 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-Pin Plastic DIP, 44-Pin Plastic Flat Pack, or
44-Pin PLCC Packages
Device Selection Table
Part
Number
Resolution
Package
Operating
Temp. Range
TC820CPL 3-3/4 Digits 40-Pin PDIP 0°C to +70°C
TC820CKW 3-3/4 Digits 44-Pin PQFP 0°C to +70°C
TC820CLW 3-3/4 Digits 44-Pin PLCC 0°C to +70°C
General Description
The TC820 is a 3-3/4 digit, multi-measurement system
especially suited for use in portable instruments. It inte-
grates a dual slope A/D converter, auto-ranging fre-
quency counter and logic probe into a single 44-pin
surface mount, or 40-pin through hole package. The
TC820 operates from a single 9V input voltage (bat-
tery) and features a built-in battery low flag. Function
and decimal point selection are accomplished with sim-
ple logic inputs designed for direct connection to an
external microcontroller or rotary switch.
© 2002 Microchip Technology Inc.
DS21476B-page 1