OMO ElectronicOMO Electronic
Expand menu
Hello, Sign inMy Account
0 Cart

TC14433AELI713

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24
TC14433/A
DS21394D-page 4 © 2008 Microchip Technology Inc.
TEMPERATURE SPECIFICATIONS
Digital
Output Voltage
(Pins 14 to 23) (Note 3)
V
OL
— 0 0.05 — — 0.05 V V
SS
= 0V, “0” Level
— -5 -4.95 — — -4.95 V V
SS
= -5V, “0” Level
Output Voltage
(Pins 14 to 23) (Note 3)
V
OH
4.95 5 — 4.95 — — V V
SS
= 0V, “1” Level
4.95 5 — 4.95 — — V V
SS
= -5V, “1” Level
Output Current
(Pins 14 to 23)
I
OH
-0.2 -0.36 — -0.14 — — mA V
SS
= 0V, V
OH
= 4.6V
Source
- 0.5 -0.9 — -0.35 — — mA V
SS
= -5V, V
OH
= 5V
Source
Output Current
(Pins 14 to 23)
I
OL
0.51 0.88 — 0.36 — — mA V
SS
= 0V, V
OL
= 0.4V
Sink
1.3 2.25 — 0.9 — — mA V
SS
= -5V,
V
OL
= -4.5V Sink
Clock Frequency f
CLK
—66—— — — kHzR
C
= 300 kΩ
Input Current -DU I
DU
— ±0.00
001
±0.3 — — ±1 µA
Power
Quiescent Current:
TC14433A:
I
Q
———————V
DD
to V
EE
, I
SS
= 0
— 0.4 2 — — 3.7 mA V
DD
= 5, V
EE
= -5
— 1.4 4 — — 7.4 mA V
DD
= 8, V
EE
= -8
Quiescent Current:
TC14433
———————V
DD
to V
EE
, I
SS
= 0
— 0.9 2 — — 3.7 mA V
DD
= 5, V
EE
= -5
— 1.8 4 — — 7.4 mA V
DD
= 8, V
EE
= -8
Supply Rejection PSRR — 0.5 — — — — mV/V V
DD
to V
EE
, I
SS
= 0,
V
REF
= 2V,
V
DD
= 5, V
EE
= -5
TC14433/A ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Unless otherwise specified, 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.
Parameter Symbol Min Typ Max Min Typ Max Units Test Conditions
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.
Electrical Characteristics: Unless otherwise indicated, V
DD
= +5V and V
EE
= -5V.
Parameters Sym Min Typ Max Units Conditions
Temperature Ranges
Operating Temperature Range T
A
-40 — +85 °C Note
Storage Temperature Range T
A
-65 — +150 °C
Thermal Package Resistances
Thermal Resistance, 24LD PDIP θ
JA
— 60.5 — °C/W
Thermal Resistance, 24LD CERDIP θ
JA
—N/A—°C/W
Thermal Resistance,24LD SOIC Wide θ
JA
—70—°C/W
Thermal Resistance, 28LD PLCC θ
JA
— 61.2 — °C/W
Note: The internal junction temperature (T
J
) must not exceed the absolute maximum specification of +150°C.
© 2008 Microchip Technology Inc. DS21394D-page 5
TC14433/A
2.0 TYPICAL PERFORMANCE CURVES
Note: Unless otherwise specified, 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.
FIGURE 2-1: Rollover Error vs. Power
Supply Skew
FIGURE 2-2: Sink Current at V
DD
= 5V.
FIGURE 2-3: Clock Frequency vs.
Resistor (R
C
)
FIGURE 2-4: Quiescent Power Supply
Current vs. Ambient Temperature.
FIGURE 2-5: Sink Current at VDD = 5V.
FIGURE 2-6: % Change to Clock
Frequency vs. Ambient Temperature.
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
ROLLOVER ERROR (IN LSD)
AT FULL SCALE
(PLUSE COUNT LESS MINUS COUNT)
-3
-2
-1
0
1
-4
-3 -2 -1
Typical Rollover Error vs. Power Supply Skew
(V
DD
I-IV
EE
I) - SUPPLY VOLTAGE SKEW (V)
01
234
2
3
4
Note: Rollover Error is the Difference in Output
Reading for the same Analog Input Switched
from Positive to Negative.
0
1
2
3
4
5
01234 5
-40°C
+25°C
+85°C
Typical N-Channel Sink Current at V
DD
– V
SS
= 5 Volts
I
D
- SINK CURRENT (mA)
V
DS
- DRAIN TO SOURCE VOLTAGE (V
DC
)
1M
10k
10kΩ 100kΩ 1MΩ
100k
CLOCK FREQUENCY
16,400
±1.5%
CONVERSION RATE =
Typical Clock Frequency vs. Resistor (R
C
)
I
CLK
- CLOCK FREQUENCY (Hz)
R
C
- CLOCK FREQUENCY RESISTOR
Note: ±5% Typical Variation over
Supply Voltage Range
of ±4.5V to ±8V
CLOCK FREQUENCY
80
MULTIPLEX RATE =
Typical Quiescent Power Supply Current vs.Temp.
I
Q
- QUIESCENT CURRENT (mA)
T
A
- TEMPERATURE (°C)
0
1
2
3
4
-40 -20 0 20 40 60 80 10
0
V
EE
= -8V
V
DD
= +8V
V
EE
= -5V
V
DD
= +5V
0
-1
-2
-3
0-1-2-3-4-5
Typical P-Channel Sink Current at V
DD
– V
SS
= 5 Volts
I
D
- SINK CURRENT (mA)
V
DS
- DRAIN TO SOURCE VOLTAGE (V
DC
)
-40°C
+25°C
+85°C
4
3
2
1
0
-1
-2
-3
-4
-40 -20 0 20 40 60 80
Normalized at 25°C
±5V Supply
±8V Supply
I
CLK
- CLOCK FREQUENCY
(% CHANGE)
Typical % Change fo Clock Frequency vs. Temp.
CLOCK FREQUENCY
16,400
±1.5%
CONVERSION RATE =
CLOCK FREQUENCY
80
MULTIPLEX RATE =
T
A
- TEMPERATURE (°C)
TC14433/A
DS21394D-page 6 © 2008 Microchip Technology Inc.
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
Pin No.
24-Pin PDIP,
SOIC
Pin No.
28-Pin
PLCC
Symbol Description
12V
AG
This is the analog ground. It has a high input impedance. The pin determines
the reference level for the unknown input voltage (V
X
) and the reference
voltage (V
REF
).
23V
REF
Reference voltage – Full scale output is equal to the voltage applied to V
REF
.
Therefore, full scale voltage of 1.999V requires 2V reference and 199.9 mV
full scale requires a 200 mV reference. V
REF
functions as system reset also.
When switched to V
EE
, the system is reset to the beginning of the
conversion cycle.
34V
X
The unknown input voltage (V
X
) is measured as a ratio of the reference
voltage (V
REF
) in a ratiometric A/D conversion.
45R
1
This pin is for external components used for the integration function in the
dual slope conversion. Typical values are 0.1 µF (Mylar) capacitor for C
1
.
56R
1
/C
1
R
1
= 470 kΩ (resistor) for 2V full scale.
67C
1
R
1
= 27 kΩ (resistor) for 200 mV full scale. Clock frequency of 66 kHz gives
250 ms conversion time.
79CO
1
These pins are used for connecting the offset correction capacitor. The
recommended value is 0.1 µF.
810CO
2
These pins are used for connecting the offset correction capacitor. The
recommended value is 0.1 µF.
9 11 DU Display update input pin. When DU is connected to the EOC output, every
conversion is displayed. New data will be strobed into the output latches
during the conversion cycle if a positive edge is received on DU, prior to the
ramp down cycle. When this pin is driven from an external source, the
voltage should be referenced to V
SS
.
10 12 CLK
1
Clock input pins. The TC14433 has its own oscillator system clock.
Connecting a single resistor between CLK
1
and CLK
0
sets the clock
frequency.
11 13 CLK
0
A crystal or OC circuit may be inserted in lieu of a resistor for improved
CLK
1
, the clock input, can be driven from an external clock source, which
need only have standard CMOS output drive. This pin is referenced to V
EE
for external clock inputs. A 300 kΩ resistor yields a clock frequency of about
66 kHz. See Section 2.0 “Typical Performance Curves”. (Also see
Figure 5-3 for alternate circuits.)
12 14 V
EE
Negative power current. Connection pin for the most negative supply. Please
note the current for the output drive circuit is returned through V
SS
. Typical
supply current is 0.8 mA.
13 16 V
SS
Negative power supply for output circuitry. This pin sets the low voltage level
for the output pins (BCD, Digit Selects, EOC, OR). When connected to
analog ground, the output voltage is from analog ground to V
DD
. If
connected to V
EE
, the output swing is from V
EE
to V
DD
. The recommended
operating range for V
SS
is between the V
DD
-3 volts and V
EE
.
14 17 EOC End of conversion output generates a pulse at the end of each conversion
cycle. This generated pulse width is equal to one half the period of the
system clock.
15 18 OR Overrange pin. Normally this pin is set high. When V
X
exceeds V
REF
the OR
is low.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24

TC14433AELI713

Mfr. #:
Buy TC14433AELI713
Manufacturer:
Microchip Technology
Description:
LED Display Drivers 3-1/2 Digit A/D BCD
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet