MICROCHIP TC14433AELI

TC14433/A
3-1/2 Digit, Analog-to-Digital Converter
Package Type
Features
Accuracy: ±0.05% of Reading ±1 Count
Two Voltage Ranges: 1.999V and 199.9 mV
Up to 25 Conversions Per Second
ZIN > 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
VAG
1
24 VDD
VREF
2
23 Q3
VX
3
22 Q2
R1 4
21 Q1
R1/C1
5
CO1
Portable Instruments
Digital Voltmeters
Digital Panel Meters
Digital Scales
Digital Thermometers
Remote A/D Sensing Systems
MPU Systems
18 DS2
CO2 8
17 DS3
9
16 DS4
DU
CLK1 10
15 OR
CLK0
11
14 EOC
VEE 12
13 VSS
24-Pin PDIP
(Wide)
24-Pin SOIC
(Wide)
0°C to +70°C
24-Pin CERDIP
(Wide)
-40°C to +85°C
2
1
Q2
28-Pin PLCC
3
Q3
TC14433AELI
TC14433AEPG
4
VDD
-40°C to +85°C
NC
24-Pin CERDIP
(Wide)
VAG
TC14433AEJG
VREF
Temperature
Range
Package
VX
28-Pin PLCC
Part Number
28 27 26
R1 5
25 Q1
-40°C to +85°C
R1/C1 6
24 Q0
-40°C to +85°C
C1 7
20 DS
DU 11
19 DS4
3
12 13 14 15 16 17 18
OR
-40°C to +85°C
CO2 10
EOC
-40°C to +85°C
24-Pin PDIP
(Wide)
22 NC
21 DS2
NC
28-Pin PLCC
NC 8
CO1 9
VSS
TC14433ELI
TC14433EPG
23 DS1
TC14433/A
CLK1
TC14433EJG
19 DS1
7
Device Selection Table
TC14433COG
20 Q0
TC14433/A
C1 6
VEE
•
•
•
•
•
•
•
24-Pin PDIP (Wide)
24-Pin CERDIP (Wide)
24-Pin SOIC (Wide)
CLK0
•
•
•
•
•
•
•
•
•
•
Note 1: NC = No internal connection (In 28-Pin PLCC).
2: 24-Pin SOIC (Wide) package, only for
TC14433 device.
 2002 Microchip Technology Inc.
DS21394B-page 1
TC14433/A
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 4mW, approximately onehalf that of the industry standard TC14433.
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 TC14433/A is available in 24-Pin PDIP, 24-Pin
CERDIP, 24-Pin SOIC (TC14433 device only), and
28-Pin PLCC packages.
Typical Application
MCP1525
+5V
20k
VOUT
VIN
1µF
VSS
1µF
-5V
+5V
0.1
300k
RC
VX
11 10 2 12 24
23
22
21
4
20
TC14433
5
6
13
1
0.1µF**
7
8
0.1µF**
16
4
2
3
5
-5V
9
14
15 19 18 17 16
-5V
*R1 = 470kΩ for 2V Range
R1 = 27kΩ for 200mV Range
**Mylar Capacitor
14013B
DS4
DS3
DS2
DS1
7
6
5
4
3
2
1
10
11
12
13
14
15
16
1413
-5V
-5V
-5V
6
5 S 1
Q
2
3 D
C RQ
4
8
9 D S Q 13
11 C Q 12
R
710 14
-5V
+5V
Segment
Resistors
150Ω (7)
9
10
11
12
13
4543B 14
15
8 6 7
3
1
R1*
DS21394B-page 2
+5V
0.1µF
+5V
Minus Sign
f g e d c b a
200Ω
MPS-A12 Plus Sign
-5V
110Ω
51k
Common
Anode Led
+5V
Display
50µF
0.1µF
MPS-A12
(4)
-5V
 2002 Microchip Technology Inc.
TC14433/A
1.0
ELECTRICAL
CHARACTERISTICS
*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.
Absolute Maximum Ratings*
Supply Voltage (V DD – VEE) ................... -0.5V to +18V
Voltage on Any Pin:
Reference to VEE .....................-0.5V to (VDD + 0.5)
DC Current, Any Pin: ........................................ ±10mA
Power Dissipation (TA ≤ 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
TC14433/A ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VDD = +5V, VEE = -5V, C1 = 0.1µF, (Mylar), C 0 = 0.1µF, RC = 300kΩ, R1 = 470kΩ @ VREF = 2V,
R1 = 27kΩ @ VREF = 200mV, unless otherwise specified.
Symbol
Parameter
Min
Max
Min
SYE
Rollover Error (Positive) and
Negative Full Scale
Symmetry
NL
Linearity Output Reading
(Note 1)
Stability Output Reading
(Note 2)
-1
—
Typ
Max
Units
+1
—
—
—
Counts 200mV Full Scale
VIN -VIN = +VIN
-0.05
+0.05
+0.05
—
—
—
%rdg
VREF = 2V
-1 count
—
+1 count
—
—
—
%rdg
VREF = 200mV
—
—
2
—
—
—
LSD
VX = 1.99V,
VREF = 2V
—
—
3
—
—
—
LSD
VX = 199mV,
VREF = 200mV
VX = 0V, VREF = 2V
ZOR
Zero Output Reading
—
0
0
—
—
—
LSD
IIN
Bias Current: Analog Input
—
±20
±100
—
—
—
pA
Reference Input
—
±20
±100
—
—
—
pA
Analog Ground
—
±20
±100
—
—
—
pA
—
65
—
—
—
—
dB
CMRR
Common mode Rejection
Test Conditions
TA = +25°C
TA = +25°C
Analog Input
SOR
Typ
VX = 1.4V, VREF = 2V,
FOC = 32kHz
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 200mV scale is defined as the range that the LSD will occupy 95% of the time.
3: Pin numbers refer to 24-pin PDIP.
 2002 Microchip Technology Inc.
DS21394B-page 3
TC14433/A
TC14433/A ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: VDD = +5V, VEE = -5V, C1 = 0.1µF, (Mylar), C 0 = 0.1µF, RC = 300kΩ, R1 = 470kΩ @ VREF = 2V,
R1 = 27kΩ @ VREF = 200mV, unless otherwise specified.
Symbol
Parameter
Min
Typ
Max
Min
Typ
Max
Units
Test Conditions
—
—
0.05
V
VSS = 0 V, "0" Level
Digital
VOL
Output Voltage
(Pins 14 to 23) (Note 3)
—
0
0.05
—
-5
-4.95
—
—
-4.95
V
VSS = -5V, "0" Level
VOH
Output Voltage
(Pins 14 to 23) (Note 3)
4.95
5
—
4.95
—
—
V
VSS = 0V, "1" Level
4.95
5
—
4.95
—
—
V
VSS = -5V, "1" Level
IOH
Output Current
(Pins 14 to 23)
-0.2
-0.36
—
-0.14
—
—
mA
VSS = 0V, VOH = 4.6V
Source
- 0.5
-0.9
—
-0.35
—
—
mA
VSS = -5V, VOH = 5V
Source
0.51
0.88
—
0.36
—
—
mA
VSS = 0V, VOL = 0.4V
Sink
1.3
2.25
—
0.9
—
—
mA
VSS = -5V,
VOL = -4.5V Sink
RC = 300kΩ
IOL
Output Current
(Pins 14 to 23)
fCLK
Clock Frequency
—
66
—
—
—
—
kHz
IDU
Input Current -DU
—
±0.00001
±0.3
—
—
±1
µA
Power
IQ
Quiescent Current: 14433A:
Quiescent Current: 14433:
PSRR
Supply Rejection
—
—
—
—
—
—
—
VDD to VEE, ISS = 0
—
0.4
2
—
—
3.7
mA
VDD = 5, VEE = -5
—
1.4
4
—
—
7.4
mA
VDD = 8, VEE = -8
—
—
—
—
—
—
—
VDD to VEE, ISS = 0
—
0.9
2
—
—
3.7
mA
VDD = 5, VEE = -5
—
1.8
4
—
—
7.4
mA
VDD = 8, VEE = -8
—
0.5
—
—
—
—
mV/V
VDD to VEE, ISS = 0,
VREF = 2V,
VDD = 5, VEE = -5
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 200mV scale is defined as the range that the LSD will occupy 95% of the time.
3: Pin numbers refer to 24-pin PDIP.
DS21394B-page 4
 2002 Microchip Technology Inc.
TC14433/A
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2.0.
TABLE 2-1:
PIN FUNCTION TABLE
Pin No.
(24-Pin PDIP)
(24-Pin CERDIP)
(24-Pin SOIC)
Pin No.
Symbol
(28-Pin PLCC)
Description
1
2
VAG
This is the analog ground. It has a high input impedance. The pin determines the
reference level for the unknown input voltage (VX) and the reference voltage (VREF).
2
3
VREF
Reference voltage - Full scale output is equal to the voltage applied to VREF.
Therefore, full scale voltage of 1.999V requires 2V reference and 199.9mV full scale
requires a 200mV reference. VREF functions as system reset also. When switched
to VEE, the system is reset to the beginning of the conversion cycle.
3
4
VX
The unknown input voltage (VX) is measured as a ratio of the reference voltage
(VREF ) in a rationetric A/D conversion.
4
5
R1
This pin is for external components used for the integration function in the dual
slope conversion. Typical values are 0.1µF (mylar) capacitor for C 1.
5
6
R1/C1
6
7
C1
7
9
CO1
These pins are used for connecting the offset correction capacitor.
The recommended value is 0.1µF.
8
10
CO2
These pins are used for connecting the offset correction capacitor.
The recommended value is 0.1µF.
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 VSS.
10
12
CLK1
Clock input pins. The TC14433 has its own oscillator system clock. Connecting a
single resistor between CLK1 and CLK0 sets the clock frequency.
11
13
CLK0
A crystal or OC circuit may be inserted in lieu of a resistor for improved CLK1 , the
clock input, can be driven from an external clock source, which need only have
standard CMOS output drive. This pin is referenced to VEE for external clock inputs.
A 300kΩ resistor yields a clock frequency of about 66kHz. See Section 5.0 Typical
Characteristics. (Also see Figure 4-3 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 VSS. Typical supply
current is 0.8mA.
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 VDD. If connected to VEE, the output swing
is from VEE to VDD. The recommended operating range for VSS is between the
VDD -3 volts and VEE.
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 VX exceeds VREF the OR is low.
16
19
DS4
Digit select pin. The digit select output goes high when the respective digit is
selected. The MSD (1/2 digit turns on immediately after an EOC pulse).
17
20
DS3
The remaining digits turn on in sequence from MSD to LSD.
18
21
DS2
To ensure that the BCD data has settled, an inter digit blanking time of two clock
periods is included.
19
23
DS1
Clock frequency divided by 80 equals multiplex rate. For example, a system clock of
60kHz gives a multiplex rate of 0.8kHz.
20
24
Q0
 2002 Microchip Technology Inc.
R1 = 470kΩ (resistor) for 2V full scale.
R1 = 27kΩ (resistor) for 200mV full scale. Clock frequency of 66kHz gives 250msec
conversion time.
See Figure 4-4 for digit select timing diagram.
DS21394B-page 5
TC14433/A
TABLE 2-1:
PIN FUNCTION TABLE (CONTINUED)
Pin No.
(24-Pin PDIP)
(24-Pin CERDIP)
(24-Pin SOIC)
Pin No.
Symbol
(28-Pin PLCC)
Description
21
25
Q1
BCD data output pin. Multiplexed BCD outputs contain three full digits of
information during digit select DS2, DS3, DS4.
22
26
Q2
During DS1, the 1/2 digit, overrange, underrange and polarity information
is available.
23
27
Q3
Refer to the Truth Table 4-1.
24
28
VDD
Positive power supply. This is the most positive power supply pin.
1
NC
Not Used.
—
8
NC
Not Used.
—
15
NC
Not Used.
—
22
NC
Not Used.
DS21394B-page 6
 2002 Microchip Technology Inc.
TC14433/A
3.0
DETAILED DESCRIPTION
The TC14433 CMOS IC becomes a modified dualslope A/D with a minimum of external components.
This IC has the customary CMOS digital logic circuitry,
as well as CMOS analog circuitry. It provides the user
with digital functions such as (counters, latches,
multiplexers), and analog functions such as
(operational amplifiers and comparators) on a single
chip. Refer to the Functional Block diagram, Figure 3-3
Features of the TC14433/A include auto-zero, high
input impedances and auto-polarity. Low power
consumption and a wide range of power supply voltages are also advantages of this CMOS device. The
system's auto-zero function compensates for the offset
voltage of the internal amplifiers and comparators. In
this "ratiometric system," the output reading is the ratio
of the unknown voltage to the reference voltage, where
a ratio of 1 is equal to the maximum count of 1999. It
takes approximately 16,000 clock periods to complete
one conversion cycle. Each conversion cycle may be
divided into 6 segments. Figure 3-1 shows the conversion cycle in 6 segments for both positive and negative
inputs.
FIGURE 3-1:
Start
Time
1
Segment
Number
Segment 1 - The offset capacitor (CO), which compensates for the input offset voltages of the buffer and integrator amplifiers, is charged during this period.
However, the integrator capacitor is shorted. This
segment requires 4000 clock periods.
Segment 2 - During this segment, the integrator output
decreases to the comparator threshold voltage. At this
time, a number of counts equivalent to the input offset
voltage of the comparator is stored in the offset latches
for later use in the auto-zero process. The time for this
segment is variable and less than 800 clock periods.
Segment 3 - This segment of the conversion cycle is
the same as Segment 1.
Segment 4 - Segment 4 is an up going ramp cycle with
the unknown input voltage (VX as the input to the
integrator.
Figure 4-2
shows
the
equivalent
configuration of the analog section of the TC14433.
The actual configuration of the analog section is
dependent upon the polarity of the input voltage during
the previous conversion cycle.
FIGURE 3-2:
INTEGRATOR
WAVEFORMS AT PIN 6
EQUIVALENT CIRCUIT
DIAGRAMS OF THE
ANALOG SECTION
DURING SEGMENT 4 OF
THE TIMING CYCLE
End
2
3
4
5
Buffer
–
6
VX
Typical
Positive
Input Voltage
VX
Typical
Negative
Input Voltage
VX
+
C1
R1
Integrator
–
+
Comparator
+
–
Segment 5 - This segment is a down-going ramp
period with the reference voltage as the input to the
integrator. Segment 5 of the conversion cycle has a
time equal to the number of counts stored in the offset
storage latches during Segment 2. As a result, the system zeros automatically.
Segment 6 - This is an extension of Segment 5. The
time period for this portion is 4000 clock periods. The
results of the A/D conversion cycle are determined in
this portion of the conversion cycle.
 2002 Microchip Technology Inc.
DS21394B-page 7
TC14433/A
FIGURE 3-3:
FUNCTIONAL BLOCK DIAGRAM
20-23
Multiplexer
RC
10
11
CLK1 CLK0
Clock
16 -19
Latches
1's
10's
Q – Q3
BDC Data
DS1 – DS4
Digit Strobe
Polarity Detect
100's
1,000's
TC14433/A
15
Overflow
Control Logic
Display
Update
DS21394B-page 8
End of
9 14 Conversion
DU EOC
CMOS
Analog Subsystem
4
5
R1 R1/C
6
7
8
C1 CO1 CO2
Integrator
2
1
3
OR Overrange
VREF Reference Voltage
VAG Analog Ground
Analog Input
VX
VDD = Pin 24
VSS = Pin 13
VEE = Pin 12
Offset
 2002 Microchip Technology Inc.
TC14433/A
4.0
TYPICAL APPLICATIONS
The Typical Application circuit is an example of a 3-1/2
digit voltmeter using the TC14433 with Commonanode displays. This system requires a 2.5V reference.
Full scale may be adjusted to 1.999V or 199.9 mV.
Input overrange is indicated by flashing a display. This
display uses LEDs with common anode digit lines.
Power supply for this system is shown as a dual ±5V
supply; however, the TC14433 will operate over a wide
voltage range
The circuit in Figure 4-1 shows a 3-1/2 digit LCD
voltmeter. The 14024B provides the low frequency
square wave signal drive to the LCD backplane. Dual
power supplies are shown here; however, one supply
may be used when VSS is connected to VEE. In this
case, VAG must be at least 2.8V above VEE.
When only segments b and c of the decoder are connected to the 1/2 digit of the display, 4, 0, 7 and 3
appear as 1.
The overrange indication (Q 3 = 0 and Q0 = 1) occurs
when the count is greater than 1999; (e.g., 1.999V for
a reference of 2V) The underrange indication, useful for
auto-ranging circuits, occurs when the count is less
than 180; (e.g., 0.180V for a reference of 2V).
Note:
If the most significant digit is connected to
a display other than a "1" only, such as a
full digit display, segments other than b
and c must be disconnected. The BCD to
7-segment decoder must blank on BCD
inputs 1010 to 1111. See Table 4-1
TABLE 4-1:
TRUTH TABLE
Coded
Q
Condition
3
of MSD
Q
Q
Q
2
1
0
+0
1
1
1
0
-0
1
0
1
0
+0 UR
1
1
1
1
-0 UR
1
0
1
1
+1
0
1
0
0
-1
0
0
0
0
+1 OR
0
1
1
1
-1 OR
0
0
1
1
Note 1:
BDC to 7-Segment
Decoding
Blank
Blank
Blank
Blank
4–1
0–1
7–1
3–1
Hook up
only segments
b and c to MSD
Q3 - 1/2 digit, low for "1", high for "0".
Q2 - Polarity: "1" = positive, "0" = negative.
Q0 - Out of range condition exists if Q0 = 1.
When used in conjunction with Q3, the type of
out of range condition is indicated; i.e., Q3 = 0 →
OR or Q3 = 1 → UR.
Figure 4-2 is an example of a 3-1/2 digit LED voltmeter
with a minimum of external components, (only 11
additional components). In this circuit, the 14511B
provides the segment drive and the 75492 or 1413
provides sink for digit current. Display is blanked during
the overrange condition.
 2002 Microchip Technology Inc.
DS21394B-page 9
TC14433/A
FIGURE 4-1:
3-1/2 DIGIT VOLTMETER WITH LCD DISPLAY
0.1µF
V+
470k
0.1µF
-V
R1/C 1C1
VX
DS4
DS3
VAG
DS2
DS1
TC14433
Q0
Q1
VREF
Q2
Q3
VDD VSS VEE EOE DU RC RC
C01 C02 R1
MCP1525
VIN
VOUT
VSS
20k
1µF
+V
-V
C
R 14024B
14070B 1/4
+V
300k
14013B
14070B
1/4
1/2 Digit
D
Q
C R RQ
14013B
D
Q
C R RQ
Plus
Sign
-V 1/4 14070B
Minus
Sign
+V
DS21394B-page 10
BI D C B A Ph LD
BI D C B A Ph LD
+V
BI D C B A Ph LD
14543B
+V
14543B
+V
g f e d c b a
-V
g f e d c b a
-V
14543B
g f e d c b a
+V
-V
 2002 Microchip Technology Inc.
TC14433/A
FIGURE 4-2:
3-1/2 DIGIT LED VOLTMETER WITH LOW COMPONENT COUNT USING
COMMON CATHODE DISPLAYS
470k 0.1µF 0.1µF
VX
+5V
Input
MCP1525
VIN
VOUT
VSS
20k
R1 R1/C C1 C01 C02
VX
CLK1
VAG
CLK0
DU
OR
Q0
EOE
Q1
TC14433
Q2
VREF
300k
VSS
1µF
A B1 a
B
b
C I4511B c
d
D
e
LT
f
LE
VSS VDD g
+5V
VDD
VEE
DS4 DS3 DS2 DS1
OR
RDP
RM
Alternate Overrange Circuit
with Separated LED
1/6 75492
OR
1/7 1413
Resitor Network
or Individual
Resistor*
R
VEE**
(Minus)
RR
+5V
+5V
Minus
Control
Common
Cathode
Led Display
75492
OR
1413*
Digit Drivers
Note 1: For VREF = 2000V; V: 1.999V full scale.
2: For VREF = 200mV; V: 199.9mV full scale (change 470k to R = 27k and decimal point position.
3: Peak digit current for an eight displayed is 7 times the segment current:
*To increase segment current capability, add two 75491 ICs between 14511B and resistor network.
The use of the 1413 as digit driver increases digit current capability over the 75492.
**V can range between -2.8V and -11V.
FIGURE 4-3:
ALTERNATE OSCILLATOR CIRCUITS
(A) Crystal Oscillator Circuit
10
C1
C2
10
CLK1
TC14433
18M
11
(B) LC Oscillator Circuit
C
L
47k
C
10pF < C1 and C2 < 200pF
 2002 Microchip Technology Inc.
TC14433
11
CLK0
f=
1
2π
CLK1
CLK0
2/LC
For L = 5mH and C = 0.01µF, f ≅ 32kHz
DS21394B-page 11
TC14433/A
FIGURE 4-4:
EOC
DIGIT SELECT TIMING DIAGRAM
1/2 Clock Cycle
≈ 16,400 Clock Cycles
Between EOC Pulses
18 Clock Cycles
DS1
1/2 Digit
(MSD)
2 Clock Cycles
DS2
DS3
DS4
LCD
DS21394B-page 12
 2002 Microchip Technology Inc.
TC14433/A
5.0
TYPICAL CHARACTERISTICS
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.
Typical Quiescent Power Supply Current vs.Temp.
4
IQ - QUIESCENT CURRENT (mA)
ROLLOVER ERROR (IN LSD)
AT FULL SCALE
(PLUSE COUNT LESS MINUS COUNT)
Typical Rollover Error vs. Power Supply Skew
4
3
2
1
0
-1
-2
Note: Rollover Error is the Difference in Output
Reading for the same Analog Input Switched
from Positive to Negative.
-3
-4
-3
-2
-1
0
1
2
3
3
VEE = -8V
VDD = +8V
2
1
VEE = -5V
VDD = +5V
-40
0
4
-20
0
20
40
60
80
100
TA - TEMPERATURE (°C)
(VDD I-IVEE I) - SUPPLY VOLTAGE SKEW (V)
Typical P-Channel Sink Current at VDD – VSS = 5 Volts
Typical N-Channel Sink Current at VDD – VSS = 5 Volts
5
ID - SINK CURRENT (mA)
ID - SINK CURRENT (mA)
-3
4
-40°C
3
+25°C
2
+85°C
1
-40°C
-2
+25°C
+85°C
-1
0
0
0
1
2
3
4
0
5
Typical Clock Frequency vs. Resistor (RC)
-2
-3
-4
-5
Typical % Change fo Clock Frequency vs. Temp.
4
Note: ±5% Typical Variation over
Supply Voltage Range
of ±4.5V to ±8V
1M
100k
10k
10kΩ
100kΩ
1MΩ
RC - CLOCK FREQUENCY RESISTOR
ICLK - CLOCK FREQUENCY
(% CHANGE)
ICLK - CLOCK FREQUENCY (Hz)
-1
VDS - DRAIN TO SOURCE VOLTAGE (VDC)
VDS - DRAIN TO SOURCE VOLTAGE (VDC)
±5V Supply
3
2
1
0
±8V Supply
-1
-2
Normalized at 25°C
-3
-4
-40
-20
0
20
40
60
80
TA - TEMPERATURE (°C)
CONVERSION RATE =
CLOCK FREQUENCY
±1.5%
16,400
CONVERSION RATE =
CLOCK FREQUENCY
±1.5%
16,400
MULTIPLEX RATE =
CLOCK FREQUENCY
80
MULTIPLEX RATE =
CLOCK FREQUENCY
80
 2002 Microchip Technology Inc.
DS21394B-page 13
TC14433/A
6.0
PACKAGING INFORMATION
6.1
Package Marking Information
Package marking data not available at this time.
6.2
Taping Form
Component Taping Orientation for 24-Pin SOIC (Wide) Devices
User Direction of Feed
PIN 1
W
P
Standard Reel Component Orientation
for TR Suffix Device
Carrier Tape, Number of Components Per Reel and Reel Size
Package
24-Pin SOIC (W)
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
24 mm
12 mm
1000
13 in
Component Taping Orientation for 28-Pin PLCC Devices
User Direction of Feed
PIN 1
W
P
Standard Reel Component Orientation
for TR Suffix Device
Carrier Tape, Number of Components Per Reel and Reel Size
Package
28-Pin PLCC
DS21394B-page 14
Carrier Width (W)
Pitch (P)
Part Per Full Reel
Reel Size
24 mm
16 mm
750
13 in
 2002 Microchip Technology Inc.
TC14433/A
6.3
Package Dimensions
24-Pin PDIP (Wide)
PIN 1
.555 (14.10)
.530 (13.46)
1.270 (32.26)
1.240 (31.50)
.610 (15.49)
.590 (14.99)
.200 (5.08)
.140 (3.56)
.040 (1.02)
.020 (0.51)
.150 (3.81)
.115 (2.92)
.015 (0.38)
.008 (0.20)
3°MIN.
.700 (17.78)
.610 (15.50)
.070 (1.78)
.045 (1.14)
.110 (2.79)
.090 (2.29)
.022 (0.56)
.015 (0.38)
Dimensions: inches (mm)
24-Pin CERDIP (Wide)
PIN 1
.540 (13.72)
.510 (12.95)
.030 (0.76) MIN.
.098 (2.49) MAX.
1.270 (32.26)
1.240 (31.50)
.620 (15.75)
.590 (15.00)
.060 (1.52)
.020 (0.51)
.210 (5.33)
.170 (4.32)
.200 (5.08)
.125 (3.18)
.150 (3.81)
MIN.
.110 (2.79)
.090 (2.29)
.065 (1.65)
.045 (1.14)
.020 (0.51)
.016 (0.41)
.015 (0.38)
.008 (0.20)
3° MIN.
.700 (17.78)
.620 (15.75)
Dimensions: inches (mm)
 2002 Microchip Technology Inc.
DS21394B-page 15
TC14433/A
Package Dimensions (Continued)
24-Pin SOIC (Wide)
PIN 1
.299 (7.59) .419 (10.65)
.291 (7.40) .398 (10.10)
.615 (15.62)
.597 (15.16)
.104 (2.64)
.097 (2.46)
.050 (1.27) TYP. .019 (0.48)
.014 (0.36)
.012 (0.30)
.004 (0.10)
8°
MAX.
.013 (0.33)
.009 (0.23)
.050 (1.27)
.016 (0.40)
Dimensions: inches (mm)
28-Pin PLCC
PIN 1
.021 (0.53)
.013 (0.33)
.050 (1.27) TYP.
.495 (12.58)
.485 (12.32)
.456 (11.58)
.450 (11.43)
.032 (0.81)
.026 (0.66)
.456 (11.58)
.450 (11.43)
.495 (12.58)
.485 (12.32)
.430 (10.92)
.390 (9.91)
.020 (0.51) MIN.
.120 (3.05)
.090 (2.29)
.180 (4.57)
.165 (4.19)
Dimensions: inches (mm)
DS21394B-page 16
 2002 Microchip Technology Inc.
TC14433/A
SALES AND SUPPORT
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1.
2.
3.
Your local Microchip sales office
The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277
The Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.
New Customer Notification System
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.
© 2002 Microchip Technology Inc.
DS21394B-page 17
TC14433/A
NOTES:
DS21394B-page 18
© 2002 Microchip Technology Inc.
TC14433/A
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with
express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.
dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, MXLAB, PICC, PICDEM, PICDEM.net, rfPIC, Select
Mode and Total Endurance are trademarks of Microchip
Technology Incorporated in the U.S.A.
Serialized Quick Turn Programming (SQTP) is a service mark
of Microchip Technology Incorporated in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro ® 8-bit MCUs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip’s quality system for the
design and manufacture of development
systems is ISO 9001 certified.
 2002 Microchip Technology Inc.
DS21394B-page 19
WORLDWIDE SALES AND SERVICE
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Corporate Office
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Tel: 61-2-9868-6733 Fax: 61-2-9868-6755
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05/01/02
*DS21394B*
DS21394B-page 20
 2002 Microchip Technology Inc.