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TelCom Semiconductor
TelCom Semiconductor

TC14433 Datasheet Preview

TC14433 Datasheet

3-1/2 DIGIT A/D CONVERTERS

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TC14433 pdf
1
TC14433
TC14433A
3-1/2 DIGIT A/D CONVERTERS
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
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
FUNCTIONAL BLOCK DIAGRAM
RC
10 11
CLK1 CLK0
MULTIPLEXER
LATCHES
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.
TC14433AEJG
TC14433AELI
TC14433AEPG
TC14433COG
TC14433EJG
TC14433ELI
TC14433EPG
Package
24-Pin CerDIP
28-Pin PLCC
24-Pin Plastic DIP
24-Pin SOIC
24-Pin CerDIP
28-Pin PLCC
24-Pin Plastic DIP
Temp.Range
– 40°C to +85°C
– 40°C to +85°C
– 40°C to +85°C
0°C to +70°C
– 40°C to +85°C
– 40°C to +85°C
– 40°C to +85°C
20–23
16–19
Q0 – Q3
BCD DATA
DS1 –DS4
DIGIT STROBE
POLARITY DETECT
2
3
4
5
6
CLOCK
1'S
10'S
100'S
1,000'S
7
OVERFLOW
15 OR OVERRANGE
CONTROL
LOGIC
CMOS
ANALOG
SUBSYSTEM
4
R1
DISPLAY
END OF
UPDATE 9 14 CONVERSION
DU EOC
5
R1 / C1
6
C1
INTEGRATOR
7
CO1
8
CO2
OFFSET
2
1
3
VREF REFERENCE VOLTAGE
VAG ANALOG GROUND
VX ANALOG INPUT
VDD = PIN 24
VSS = PIN 13
VEE = PIN 12
TELCOM SEMICONDUCTOR, INC.
8
TC14433/A-6 10/21/96
3-127



TelCom Semiconductor
TelCom Semiconductor

TC14433 Datasheet Preview

TC14433 Datasheet

3-1/2 DIGIT A/D CONVERTERS

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TC14433 pdf
3-1/2 DIGIT A/D CONVERTERS
TC14433
TC14433A
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage (VDD – VEE) ...................... – 0.5V to +18V
Voltage on Any Pin,
Reference to VEE ....................... – 0.5V to (VDD + 0.5)
DC Current, Any Pin .............................................. ±10mA
Operating Temperature Range ............... – 40°C to +85°C
Power Dissipation (TA < 70°C)
Plastic PLCC .......................................................1.0W
Plastic DIP .......................................................940mW
SOIC ................................................................ 940mW
CerDIP ............................................................... 1.45W
Storage Temperature Range ................ – 65°C to +160°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
*This is a stress rating only and functional operation of the device at these
or any other conditions above those indicated in the operation sections of
the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS: VDD = +5V, VEE = – 5V, C1 = 0.1µF (mylar), CO = 0.1µF, RC = 300k, R1 =
470k@ VREF = 2V, R1 = 27k@ VREF = 200mV, unless otherwise specified.
Symbol Parameter
Test Conditions
TA = +25°C
– 40°C < TA < +85°C
Min Typ Max Min Typ Max Unit
Analog Input
SYE
Rollover Error (Positive
and Negative Full
Scale Symmetry
200mV Full Scale VIN
–VIN = +VIN
–1 — +1 — — — Counts
NL Linearity Output
Reading (Note 1)
VREF = 2V
VREF = 200mV
– 0.05 +0.05 +0.05 — — — %rdg
– 1 count — +1 count — — —
SOR
Stability Output Reading VX = 1.99V, VREF = 2V
(Note 2)
VX = 199mV, VREF = 200mV
2 — — — LSD
3 ———
ZOR
Zero Output Reading
VX = 0V, VREF = 2V
—0
0 — — — LSD
IIN Bias Current:
Analog Input
Reference Input
Analog Ground
±20 ±100 — — — pA
±20 ±100 — — —
±20 ±500 — — —
CMRR Common-Mode Rejection VX = 1.4V, VREF = 2V,
fOC = 32kHz
— 65 — — — — dB
Digital
VOL
VOH
IOH
IOL
fCLK
IDU
Power
Output Voltage
Pins 14 to 23 (Note 3)
Output Voltage
Pins 14 to 23 (Note 3)
Output Current
Pins 14 to 23
Output Current
Pins 14 to 23
Clock Frequency
Input Current – DU
VSS = 0V, "0" Level
VSS = – 5V, "0" Level
— 0 0.05 — — 0.05 V
– 5 –4.95 —
— – 4.95
VSS = 0V, "1" Level
VSS = – 5V, "1" Level
4.95 5
4.95 5
— 4.95 — —
— 4.95 — —
V
VSS = 0V, VOH = 4.6V Source – 0.2 – 0.36 — – 0.14 — — mA
VSS = – 5V, VOH = 5V Source – 0.5 – 0.9
— – 0.35 —
VSS = 0V, VOL = 0.4V Sink
0.51
VSS = – 5V, VOL = – 4.5V Sink 1.3
0.88
2.25
— 0.36 — — mA
0.9 —
RC = 300k
— 66 — — — — kHz
±0.00001 ±0.3 — — ±1 µA
IQ Quiescent Current
PSRR Supply Rejection
VDD to VEE, ISS = 0, 14433A:
VDD = 5, VEE = – 5
— 0.4 2 — — 3.7 mA
VDD = 8, VEE = –8
— 1.4 4 — — 7.4
VDD to VEE, ISS = 0, 14433:
VDD = 5, VEE = – 5
— 0.9 2 — — 3.7
VDD = 8, VEE = –8
— 1.8 4 — — 7.4
VDD to VEE, ISS = 0, VREF = 2V — 0.5 — — — — mV/V
VDD = 5, VEE = – 5
3-128
TELCOM SEMICONDUCTOR, INC.


Part Number TC14433
Description 3-1/2 DIGIT A/D CONVERTERS
Maker TelCom Semiconductor
Total Page 10 Pages
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