TC820 Datasheet, PDF (1/22 Pages) TelCom Semiconductor, Inc – 3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY COUNTER AND LOGIC PROBE

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TC820
3-3/4 DIGIT A/D CONVERTER WITH FREQUENCY
COUNTER AND LOGIC PROBE
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FEATURES
s Multiple Analog Measurement System
— Digit A/D Converter
— Frequency Counter
— Logic Probe
s Low Noise A/D Converter:
— Differential Inputs, (1pA Bias Current)
— On-Chip 50PPM/°C Voltage Reference
s Frequency Counter:
— 4Mhz Maximum Input Frequency
— Auto-ranging Over Four Decade Range
s Logic Probe:
— Two LCD Annunciators
— Buzzer Driver
s 3-3/4 Digit Display with Overrange Indicator
s LCD Display Driver with Built-in Contrast Control
s Data Hold Input for Comparison Measurements
s Low Battery Detect with LCD Annunciator
s Underrange and Overrange Outputs
s On-Chip Buzzer Driver with Control Input
s 44-Pin Plastic Flat Pack or PLCC or 40-Pin Plastic
DIP Packages
FUNCTIONAL BLOCK DIAGRAM
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 frequency
counter and logic probe into a single 44-pin surface mount
3 ^{or 40-pin through hole package. The TC820 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.
Ease of use, low power operation and high functional
integration make the TC820 desirable in a variety of analog
measurement applications.
ORDERING INFORMATION
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Part No. Resolution Package
Temperature
Range
TC820CKW 3-3/4 Digits 44-Pin Plastic
0°C to +70°C
Quad Flat Package
TC820CLW 3-3/4 Digits
44-Pin Plastic
Leadless Chip
Carrier
0°C to +70°C
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TC820CPL 3-3/4 Digits 40-Pin Plastic DIP 0°C to +70°C
TRIPLEX LCD
LOGIC HIGH
LOGIC LOW
OVERRANGE PKHOLD
LOW BATT
ANNUNCIATOR DRIVE
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EOC
UNDERRANGE
OVERRANGE
ANALOG
INPUT
FULL-SCALE
SELECT
FREQUENCY
INPUT
LOGIC
PROBE
INPUT
LOW DRIFT VOLTAGE
DIFFERENTIAL
REFERENCE
CLOCK
OSCILLATOR
TRIPLE LCD
DRIVERS
3-3/4 DIGIT
A/D CONVERTER
ANALOG GND
AUTORANGING
FREQUENCY
COUNTER
LOGIC
PROBE
DIGITAL GROUND
PEAK HOLD
COMPARATOR
TC820
TO LCD
AND BUZZER
LOW
BATTERY
DETECT
PEAK
HOLD
+
9V
TELCOM SEMICONDUCTOR, INC.
DECIMAL
POINT
DRIVERS
DECIMAL
POINT
SELECT
BUZZER
DRIVER
FUNCTION
SELECT
VOLTS
FREQUENCY
LOGIC
BUZZER
CONTROL
FUNCTION
SELECT
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TC820-10 10/17/96
3-149