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TC14433 Datasheet(PDF) 1 Page - TelCom Semiconductor, Inc

Part # TC14433
Description  3-1/2 DIGIT A/D CONVERTERS
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Manufacturer  TELCOM [TelCom Semiconductor, Inc]
Direct Link  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC14433 Datasheet(HTML) 1 Page - TelCom Semiconductor, Inc

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TELCOM SEMICONDUCTOR, INC.
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TC14433
TC14433A
3-1/2 DIGIT A/D CONVERTERS
APPLICATIONS
s
Portable Instruments
s
Digital Voltmeters
s
Digital Panel Meters
s
Digital Scales
s
Digital Thermometers
s
Remote A/D Sensing Systems
s
MPU Systems
s
See Application Notes 19 and 21
TC14433/A-6 10/21/96
FEATURES
s
Accuracy ...................
±0.05% of Reading ±1 Count
s
Two Voltage Ranges ............. 1.999V and 199.9 mV
s
Up to 25 Conversions Per Second
s
ZIN > 1000M Ohms
s
Single Positive Voltage Reference
s
Auto-Polarity and Auto-Zero
s
Overrange and Underrange Signals Available
s
Operates in Auto-Ranging Circuits
s
Uses On-Chip System Clock or External Clock
s
Wide Supply Range .................... e.g.,
±4.5V to ±8V
s
Package Available .................................. 24-Pin DIP
24-Pin CerDIP, 28-Pin SOIC and 28-Pin PLCC
GENERAL DESCRIPTION
The TC14433 is a low power, high-performance, mono-
lithic CMOS 3-1/2 digit A/D converter. The TC14433 com-
bines both analog and digital circuits on a single IC, thus
minimizing the number of external components. This dual-
slope A/D converter provides automatic polarity and zero
correction with the addition of two external resistors and two
capacitors. The full-scale voltage range of this ratiometric IC
extends from 199.9 millivolts to 1.999 volts. The TC14433
can operate over a wide range of power supply voltages,
including batteries and standard 5-volt supplies.
The TC14433 will interface with the TC7211A LCD
display driver.
The TC14433A features improved performance over
the industry standard TC14433. Rollover, which is the
measurement of identical positive and negative signals, is
guaranteed to have the same reading within one count for
the TC14433A. Power consumption of the TC14433A is
typically 4 mW, approximately one-half that of the industry
standard TC14433.
ORDERING INFORMATION
Part No.
Package
Temp.Range
TC14433AEJG
24-Pin CerDIP
– 40
°C to +85°C
TC14433AELI
28-Pin PLCC
– 40
°C to +85°C
TC14433AEPG
24-Pin Plastic DIP
– 40
°C to +85°C
TC14433COG
24-Pin SOIC
0
°C to +70°C
TC14433EJG
24-Pin CerDIP
– 40
°C to +85°C
TC14433ELI
28-Pin PLCC
– 40
°C to +85°C
TC14433EPG
24-Pin Plastic DIP
– 40
°C to +85°C
FUNCTIONAL BLOCK DIAGRAM
LATCHES
1'S
10'S
100'S
1,000'S
CLOCK
RC
CONTROL
LOGIC
CMOS
ANALOG
SUBSYSTEM
DISPLAY
UPDATE
9
DU
END OF
CONVERSION
EOC
R1 C1
/
14
R1
C1
45
6
CO
1
CO2
78
2
1
3
VREF
VAG
VX
REFERENCE VOLTAGE
ANALOG GROUND
ANALOG INPUT
VDD
VSS
VEE
= PIN 24
= PIN 13
= PIN 12
OFFSET
POLARITY DETECT
10
CLK1
11
CLK0
OR
OVERRANGE
MULTIPLEXER
20–23
16–19
DS
DIGIT STROBE
1 –DS4
Q
BCD DATA
0 –Q3
INTEGRATOR
15
OVERFLOW


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