© 2006 Microchip Technology Inc. DS21394C-page 1
TC14433/A
Features:
Accuracy: ±0.05% of Reading ±1 Count
Two Voltage Ranges: 1.999V and 199.9 mV
Up to 25 Conversions Per Second
•Z
IN
> 1000M Ohms
Single Positive Voltage Reference
Auto-Polarity and Auto-Zero
Overrange and Underrange Signals Available
Operates in Auto-Ranging Circuits
Uses On-Chip System Clock or External Clock
Wide Supply Range: ±4.5V to ±8V
Applications:
Portable Instruments
Digital Voltmeters
Digital Panel Meters
Digital Scales
Digital Thermometers
Remote A/D Sensing Systems
MPU Systems
Device Selection Table
Package Type
Part Number Package
Temperature
Range
TC14433AEJG 24-Pin CERDIP
(Wide)
-40°C to +85°C
TC14433AELI 28-Pin PLCC -40°C to +85°C
TC14433AEPG 24-Pin PDIP
(Wide)
-40°C to +85°C
TC14433COG 24-Pin SOIC
(Wide)
0°C to +70°C
TC14433EJG 24-Pin CERDIP
(Wide)
-40°C to +85°C
TC14433ELI 28-Pin PLCC -40°C to +85°C
TC14433EPG 24-Pin PDIP
(Wide)
-40°C to +85°C
1
2
3
4
16
15
14
5
6
7
8
13
19
18
17
9
10
11
12
20
21
22
23
24
V
DD
Q
3
Q
2
Q
1
Q
0
DS
1
DS
3
DS
2
DS
4
EOC
OR
R
1
C
1
CO
1
CO
2
R
1
/C
1
CLK0
CLK1
DU
V
EE
V
SS
V
AG
V
X
V
REF
T
C
14433
/
A
24-Pin PDIP (Wide)
24-Pin CERDIP (Wide)
24-Pin SOIC (Wide)
V
REF
NC
V
DD
Q
3
Q
1
Q
0
DS
2
DS
3
DS
1
DS
4
Q
2
V
AG
V
X
CO
1
V
EE
CO
2
R
1
/C
1
C
1
R
1
V
SS
EOC
NC NC
NC
DU
CLK0
CLK1
19
20
21
22
23
24
25
11
10
9
8
7
6
5
TC14433/A
12 13 14 15 17 18
4 3 2 1 27 2628
16
28-Pin PLCC
OR
Note 1: NC = No internal connection (In 28-Pin
PLCC).
2: 24-Pin SOIC (Wide) package, only for
TC14433 device.
3-1/2 Digit, Analog-to-Digital Converter
TC14433/A
DS21394C-page 2 © 2006 Microchip Technology Inc.
General Description
The TC14433 is a low-power, high-performance,
monolithic CMOS 3-1/2 digit A/D converter. The
TC14433 combines 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 TC14433A features improved performance over
the industry standard TC14433. Rollover, which is the
measurement of identical positive and negative
signals, is specified 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.
The TC14433/A is available in 24-Pin PDIP, 24-Pin
CERDIP, 24-Pin SOIC (TC14433 device only), and
28-Pin PLCC packages.
Typical Application
3
1
4
5
6
7
8
23
22
21
20
13
9
14
15
19 18 17 16
11 10 2 12 24
4
2
3
5
9
10
11
12
13
14
15
1
7
6
5
4
3
2
1
10
11
12
13
14
15
16
0.1 μF**
0.1 μF
0.1 μF
50 μF
0.1 μF**
R
1
*
*R
1
= 470 kΩ for 2V Range
R
1
= 27 kΩ for 200 mV Range
**Mylar Capacitor
V
X
20k
D
C
S
R
TC14433
Q
Q
D
C
S
R
+5V
-5V
16
+5V
+5V
Segment
Resistors
150Ω (7)
+5V
Q
Q
-5V
-5V
-5V
-5V
8
Minus Sign
200Ω
51k
67
+5V
-5V
-5V
-5V
MPS-A12
(4)
Common
Anode Led
Display
MPS-A12
300k
R
C
0.1
14013B
5
3
9
11
1
2
13
12
6
714
10
fgedcba
+5V
1 μF
1 μF
4
8
DS
4
DS
3
DS
2
DS
1
-5V
MCP1525
4543B
1413
V
IN
V
OUT
V
SS
Plus Sign
110Ω
© 2006 Microchip Technology Inc. DS21394C-page 3
TC14433/A
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage (V
DD
– V
EE
)................... -0.5V to +18V
Voltage on Any Pin:
Reference to V
EE
.....................-0.5V to (V
DD
+ 0.5)
DC Current, Any Pin: .......................................±10 mA
Power Dissipation (T
A
70°C):
Plastic PLCC .................................................1.0W
Plastic PDIP..................................................940W
SOIC.............................................................940W
CERDIP.......................................................1.45W
Operating Temperature Range ...............0°C to +70°C
Storage Temperature Range..............-65°C to +160°C
*Stresses above those listed under “Absolute
Maximum Ratings” may cause permanent damage to
the device. These are stress ratings 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.
TABLE 1-1: TC14433/A ELECTRICAL SPECIFICATIONS
Electrical Characteristics: V
DD
= +5V, V
EE
= -5V, C
1
= 0.1 μF, (Mylar), C
0
= 0.1 μF, R
C
= 300 kΩ, R
1
= 470 kΩ @ V
REF
= 2V, R
1
=
27 kΩ @ V
REF
= 200 mV, T
A
= 25°C, unless otherwise specified.
Symbol Parameter
Min Typ Max Min Typ Max Units Test Conditions
Analog Input
SYE Rollover Error (Positive) and
Negative Full Scale
Symmetry
-1 +1 Count
s
200 mV Full Scale
V
IN
-V
IN
= +V
IN
NL Linearity Output Reading
(Note 1)
-0.05 +0.05 +0.05 %rdg V
REF
= 2V
-1 count +1 count %rdg V
REF
= 200 mV
SOR Stability Output Reading
(Note 2)
—— 2 LSDV
X
= 1.99V,
V
REF
= 2V
—— 3 LSDV
X
= 199 mV,
V
REF
= 200 mV
ZOR Zero Output Reading
—0 0 LSDV
X
= 0V, V
REF
= 2V
I
IN
Bias Current: Analog Input
Reference Input
Analog Ground
—±20±100pA
—±20±100pA
—±20±100pA
CMRR Common mode Rejection
—65 dBV
X
= 1.4V, V
REF
= 2V,
F
OC
= 32 kHz
Note 1: Accuracy – The accuracy of the meter at full scale is the accuracy of the setting of the reference voltage. Zero is
recalculated during each conversion cycle. The meaningful specification is linearity. In other words, the deviation from
correct reading for all inputs other than positive full scale and zero is defined as the linearity specification.
2: The LSD stability for 200 mV scale is defined as the range that the LSD will occupy 95% of the time.
3: Pin numbers refer to 24-pin PDIP.

TC14433COG

Mfr. #:
Manufacturer:
Microchip Technology
Description:
LED Display Drivers 3-1/2 Digit A/D BCD
Lifecycle:
New from this manufacturer.
Delivery:
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