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TC14433/A
3-1/2 Digit, Analog-to-Digital Converter
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
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 onehalf that of the industry standard TC14433. The TC14433/A is available in 24-Pin PDIP, 24-Pin SOIC (TC14433 device only), and 28-Pin PLCC packages.
Applications:
* * * * * * Portable Instruments Digital Voltmeters Digital Panel Meters Digital Scales Digital Thermometers Remote A/D Sensing Systems
Package Type
24-Pin PDIP (Wide) 24-Pin SOIC (Wide) VAG VREF VX R1 R1/C1 C1 CO1 CO2 DU 1 2 3 4 5 6 7 8 9 24 VDD 23 Q3 22 Q2 21 Q1 R1 5 R1/C1 6 C1 7 NC 8 CO1 9 CO2 10 DU 11 12 13 14 15 16 17 18 CLK1 CLK0 EOC VEE VSS OR DS21394D-page 1 NC VX 28-Pin PLCC VREF VDD VAG NC Q3 Q2 25 Q1 24 Q0 23 DS1 22 NC 21 DS2 20 DS3 19 DS4
4
3
2
1
28 27 26
TC14433/A
20 Q0 19 DS1 18 DS2 17 DS3 16 DS4 15 OR 14 EOC 13 VSS
TC14433/A
CLK1 10 CLK0 11 VEE 12
Note 1: 2:
NC = No internal connection (In 28-Pin PLCC). 24-Pin SOIC (Wide) package, only for TC14433 device.
(c) 2008 Microchip Technology Inc.
TC14433/A
Typical Application
MCP1525 +5V VIN VOUT VSS 1 F 300 k RC 11 10 2 12 24 23 22 21 4 20 5 TC14433 6 13 3 1 R1* 7 8 9 14 15 19 18 17 16 +5V 0.1 F 0.1 F 1 4 2 3 5 -5V 16 7 6 5 4 3 2 1 -5V -5V 10 11 12 13 14 15 16 1413 Minus Sign fgedcba 20 k -5V +5V +5V Segment Resistors 150 (7)
1 F VX
0.1 F** 0.1 F**
9 10 11 12 13 4543B 14 15 867
-5V -5V 6 5S1 Q 3D 2 C RQ 4 8 9 D S Q 13 11 C Q 12 R 710 14 +5V
14013B
200 MPS-A12 Plus Sign -5V 110 51 k Common Anode Led +5V Display 50 F 0.1 F MPS-A12 (4) -5V
*R1 = 470 k for 2V Range *R1 = 27 k for 200 mV Range **Mylar Capacitor
DS4 DS3 DS2 DS1
-5V
DS21394D-page 2
(c) 2008 Microchip Technology Inc.
TC14433/A
1.0 ELECTRICAL CHARACTERISTICS
Notice: 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 (VDD - VEE) ................... -0.5V to +18V Voltage on Any Pin: Reference to VEE .....................-0.5V to (VDD + 0.5) DC Current, Any Pin: ....................................... 10 mA Power Dissipation (TA 70C): Plastic PLCC ................................................. 1.0W Plastic PDIP.............................................. 940 mW SOIC ......................................................... 940 mW Operating Temperature Range ............ -40C to +85C Storage Temperature Range .............. -65C to +160C
TC14433/A ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise specified, VDD = +5V, VEE = -5V, C1 = 0.1 F, (Mylar), C0 = 0.1 F, RC = 300 k, R1 = 470 k @ VREF = 2V, R1 = 27 k @ VREF = 200 mV, TA = +25C. Parameter Analog Input Rollover Error (Positive) and Negative Full Scale Symmetry Linearity Output Reading (Note 1) Stability Output Reading (Note 2) SYE -1 -- +1 -- -- -- Counts 200 mV Full Scale VIN -VIN = +VIN VREF = 2V VREF = 200 mV VX = 1.99V, VREF = 2V VX = 199 mV, VREF = 200 mV VX = 0V, VREF = 2V Symbol Min Typ Max Min Typ Max Units Test Conditions
NL SOR
-0.05 -1 count -- --
+0.05 -- -- -- 0 20 20 20 65
+0.05 +1 count 2 3 0 100 100 100 --
-- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- --
-- -- -- -- -- -- -- -- --
%rdg %rdg LSD LSD LSD pA pA pA dB
Zero Output Reading Bias Current: Analog Input Reference Input Analog Ground Common mode Rejection Note 1:
ZOR IIN
-- -- -- --
CMRR
--
VX = 1.4V, VREF = 2V, FOC = 32 kHz
2: 3:
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. The LSD stability for 200 mV scale is defined as the range that the LSD will occupy 95% of the time. Pin numbers refer to 24-pin PDIP.
(c) 2008 Microchip Technology Inc.
DS21394D-page 3
TC14433/A
TC14433/A ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics: Unless otherwise specified, VDD = +5V, VEE = -5V, C1 = 0.1 F, (Mylar), C0 = 0.1 F, RC = 300 k, R1 = 470 k @ VREF = 2V, R1 = 27 k @ VREF = 200 mV, TA = +25C. Parameter Digital Output Voltage (Pins 14 to 23) (Note 3) Output Voltage (Pins 14 to 23) (Note 3) Output Current (Pins 14 to 23) VOL -- -- VOH IOH 4.95 4.95 -0.2 - 0.5 Output Current (Pins 14 to 23) IOL 0.51 1.3 Clock Frequency Input Current -DU Power Quiescent Current: TC14433A: IQ -- -- -- Quiescent Current: TC14433 -- -- -- Supply Rejection PSRR -- -- 0.4 1.4 -- 0.9 1.8 0.5 -- 2 4 -- 2 4 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 3.7 7.4 -- 3.7 7.4 -- -- mA mA -- mA mA mV/V VDD to VEE, ISS = 0 VDD = 5, VEE = -5 VDD = 8, VEE = -8 VDD to VEE, ISS = 0 VDD = 5, VEE = -5 VDD = 8, VEE = -8 VDD to VEE, ISS = 0, VREF = 2V, VDD = 5, VEE = -5 fCLK IDU -- -- 0 -5 5 5 -0.36 -0.9 0.88 2.25 66 0.00 001 0.05 -4.95 -- -- -- -- -- -- -- 0.3 -- -- 4.95 4.95 -0.14 -0.35 0.36 0.9 -- -- -- -- -- -- -- -- -- -- -- -- 0.05 -4.95 -- -- -- -- -- -- -- 1 V V V V mA mA mA mA kHz A VSS = 0V, "0" Level VSS = -5V, "0" Level VSS = 0V, "1" Level VSS = -5V, "1" Level VSS = 0V, VOH = 4.6V Source VSS = -5V, VOH = 5V Source VSS = 0V, VOL = 0.4V Sink VSS = -5V, VOL = -4.5V Sink RC = 300 k Symbol Min Typ Max Min Typ Max Units Test Conditions
Note 1:
2: 3:
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. The LSD stability for 200 mV scale is defined as the range that the LSD will occupy 95% of the time. Pin numbers refer to 24-pin PDIP.
TEMPERATURE SPECIFICATIONS
Electrical Characteristics: Unless otherwise indicated, VDD = +5V and VEE = -5V. Parameters Temperature Ranges Operating Temperature Range Storage Temperature Range Thermal Package Resistances Thermal Resistance, 24LD PDIP Thermal Resistance, 24LD CERDIP Thermal Resistance,24LD SOIC Wide Thermal Resistance, 28LD PLCC Note: JA JA JA JA -- -- -- -- 60.5 N/A 70 61.2 -- -- -- -- C/W C/W C/W C/W TA TA -40 -65 -- -- +85 +150 C C Note Sym Min Typ Max Units Conditions
The internal junction temperature (TJ) must not exceed the absolute maximum specification of +150C.
DS21394D-page 4
(c) 2008 Microchip Technology Inc.
TC14433/A
2.0
Note:
TYPICAL PERFORMANCE CURVES
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.
Note: Unless otherwise specified, VDD = +5V, VEE = -5V, C1 = 0.1 F, (Mylar), C0 = 0.1 F, RC = 300 k, R1 = 470 k @ VREF = 2V,
R1 = 27 k @ VREF = 200 mV, TA = +25C.
Typical Rollover Error vs. Power Supply Skew
ROLLOVER ERROR (IN LSD) AT FULL SCALE (PLUSE COUNT LESS MINUS COUNT)
4 3 2 1 0 -1 -2 -3 -4 -3 -2 -1 0 1 2 3 4 Note: Rollover Error is the Difference in Output Reading for the same Analog Input Switched from Positive to Negative.
Typical Quiescent Power Supply Current vs.Temp.
4
IQ - QUIESCENT CURRENT (mA)
3 VEE = -8V VDD = +8V 2
1 VEE = -5V VDD = +5V 0 -40 -20 0 20 40 60 80 100
(VDD I-IVEE I) - SUPPLY VOLTAGE SKEW (V)
TA - TEMPERATURE (C)
FIGURE 2-1: Supply Skew
Rollover Error vs. Power
FIGURE 2-4: Quiescent Power Supply Current vs. Ambient Temperature.
Typical P-Channel Sink Current at VDD - VSS = 5 Volts
-3
ID - SINK CURRENT (mA)
Typical N-Channel Sink Current at VDD - VSS = 5 Volts
5
ID - SINK CURRENT (mA)
4 3 2 1 0 0 1 2 3 4 5 VDS - DRAIN TO SOURCE VOLTAGE (VDC) -40C +25C +85C
-40C -2 +25C +85C -1
0 0 -1 -2 -3 -4 -5 VDS - DRAIN TO SOURCE VOLTAGE (VDC)
FIGURE 2-2:
Sink Current at VDD = 5V.
FIGURE 2-5:
Sink Current at VDD = 5V.
Typical Clock Frequency vs. Resistor (RC)
ICLK - CLOCK FREQUENCY (Hz)
Typical % Change fo Clock Frequency vs. Temp.
4
1M
Note: 5% Typical Variation over Supply Voltage Range of 4.5V to 8V
ICLK - CLOCK FREQUENCY (% CHANGE)
3 2 1 0 -1 -2
5V Supply
8V Supply
100k
Normalized at 25C -3 -4 -40 -20 0 20 40 60 80
10k 10k 100k 1M RC - CLOCK FREQUENCY RESISTOR CLOCK FREQUENCY 1.5% 16,400 CLOCK FREQUENCY 80
TA - TEMPERATURE (C) CONVERSION RATE = MULTIPLEX RATE = CLOCK FREQUENCY 1.5% 16,400 CLOCK FREQUENCY 80
CONVERSION RATE = MULTIPLEX RATE =
FIGURE 2-3: Resistor (RC)
Clock Frequency vs.
FIGURE 2-6: % Change to Clock Frequency vs. Ambient Temperature.
DS21394D-page 5
(c) 2008 Microchip Technology Inc.
TC14433/A
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1:
Pin No. 24-Pin PDIP, SOIC 1
PIN FUNCTION TABLE
Pin No. 28-Pin PLCC 2 Symbol VAG Description 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). Reference voltage - Full scale output is equal to the voltage applied to VREF. Therefore, full scale voltage of 1.999V requires 2V reference and 199.9 mV full scale requires a 200 mV reference. VREF functions as system reset also. When switched to VEE, the system is reset to the beginning of the conversion cycle. The unknown input voltage (VX) is measured as a ratio of the reference voltage (VREF) in a ratiometric A/D conversion. This pin is for external components used for the integration function in the dual slope conversion. Typical values are 0.1 F (Mylar) capacitor for C1. R1 = 470 k (resistor) for 2V full scale. R1 = 27 k (resistor) for 200 mV full scale. Clock frequency of 66 kHz gives 250 ms conversion time. These pins are used for connecting the offset correction capacitor. The recommended value is 0.1 F. These pins are used for connecting the offset correction capacitor. The recommended value is 0.1 F. 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. Clock input pins. The TC14433 has its own oscillator system clock. Connecting a single resistor between CLK1 and CLK0 sets the clock frequency. 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 300 k resistor yields a clock frequency of about 66 kHz. See Section 2.0 "Typical Performance Curves". (Also see Figure 5-3 for alternate circuits.) 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 0.8 mA. 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. 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. Overrange pin. Normally this pin is set high. When VX exceeds VREF the OR is low.
2
3
VREF
3 4 5 6 7 8 9
4 5 6 7 9 10 11
VX R1 R1/C1 C1 CO1 CO2 DU
10
12
CLK1
11
13
CLK0
12
14
VEE
13
16
VSS
14
17
EOC
15
18
OR
DS21394D-page 6
(c) 2008 Microchip Technology Inc.
TC14433/A
TABLE 3-1:
Pin No. 24-Pin PDIP, SOIC 16 17 18 19 20 21 22 23 24 -- -- -- --
PIN FUNCTION TABLE (CONTINUED)
Pin No. 28-Pin PLCC 19 20 21 23 24 25 26 27 28 1 8 15 22 Symbol DS4 DS3 DS2 DS1 Q0 Q1 Q2 Q3 VDD NC NC NC NC Description 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). The remaining digits turn on in sequence from MSD to LSD. To ensure that the BCD data has settled, an inter digit blanking time of two clock periods is included. Clock frequency divided by 80 equals multiplex rate. For example, a system clock of 60 kHz gives a multiplex rate of 0.8 kHz. See Figure 5-4 for digit select timing diagram. BCD data output pin. Multiplexed BCD outputs contain three full digits of information during digit select DS2, DS3, DS4. During DS1, the 1/2 digit, overrange, underrange and polarity information is available. Refer to the Truth Table 5-1. Positive power supply. This is the most positive power supply pin. Not Used. Not Used. Not Used. Not Used.
(c) 2008 Microchip Technology Inc.
DS21394D-page 7
TC14433/A
4.0 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 4-3. 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 4-1 shows the conversion cycle in 6 segments for both positive and negative inputs.
i
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. C1 Buffer - VX + R1 Integrator - + Comparator + -
Start Time Segment Number 1 2 3 4 5 6 VX
End
Typical Positive Input Voltage
FIGURE 4-2: Equivalent Circuit Diagrams of the Analog Section During Segment 4 of the Timing Cycle
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.
VX
Typical Negative Input Voltage
FIGURE 4-1: Pin 6.
Integrator Waveforms at
DS21394D-page 8
(c) 2008 Microchip Technology Inc.
TC14433/A
20-23 RC 10 11 CLK 1 CLK 0 Clock 1s' Multiplexer 16 -19 Q - Q3 BDC Data DS 1 - DS 4 Digit Strobe Polarity Detect 100s' 1,000s'
Latches 10s'
TC14433/A Overflow
15
OR Overrange V REF Reference Voltage V AG Analog Ground VX Analog Input V DD = Pin 24 V SS = Pin 13 V EE = Pin 12
Control Logic
CMOS Analog Subsystem 4 5 R 1 R 1 /C 7 8 6 C 1 CO 1 CO 2 Offset
2 1 3
Display Update
End of 9 14 Conversion DU EOC
Integrator
FIGURE 4-3:
Functional Block Diagram.
(c) 2008 Microchip Technology Inc.
DS21394D-page 9
TC14433/A
5.0 TYPICAL APPLICATIONS
TABLE 5-1:
Coded Q Condition 3 of MSD +0 -0 +0 UR -0 UR +1 -1 +1 OR -1 OR
Note 1:
TRUTH TABLE
Q
2
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 5-1 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 (Q3 = 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 5-1).
Q
1
Q
0
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
1 1 1 1 0 0 0 0
1 0 1 0 1 0 1 0
1 1 1 1 0 0 1 1
0 0 1 1 0 0 1 1
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 5-2 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.
DS21394D-page 10
(c) 2008 Microchip Technology Inc.
TC14433/A
0.1 F V+ MCP1525 VIN VOUT VSS 1 F 20 k VREF VDD VSS VEE EOE DU +V -V 470 k 0.1 F R1 R1/C1 C1 DS4 DS3 DS2 DS1 Q0 Q1 Q2 Q3 RC 300 k 14070B 1/4 +V -V C 14024B R
C01 C02 VX VAG
TC14433
14013B D CR Q RQ
1/4
14070B 1/2 Digit
14013B D CR Q RQ
Plus Sign -V 1/4 14070B Minus Sign
+V BI D C B A Ph LD 14543B gfedcba +V -V BI D C B A Ph LD 14543B gfedcba +V -V BI D C B A Ph LD 14543B gfedcba +V -V
+V
FIGURE 5-1:
3-1/2 Digit Voltmeter with LCD Display.
(c) 2008 Microchip Technology Inc.
DS21394D-page 11
TC14433/A
470 k 0.1 F 0.1 F
+5V MCP1525 VIN VOUT VSS 1 F
VX
Input
20k
R1 R1 /C C1 C01 C02 VX CLK1 VAG CLK0 DU OR Q0 EOE Q1 TC14433 Q2 VREF VSS VDD VEE DS4 DS3 DS2 DS1
300 k
Resitor Network or Individual Resistor* A B1 B C I4511B D LT LE VSS VDD a b c d e f g RDP R
+5V
Alternate Overrange Circuit with Separated LED 1/6 75492 OR 1/7 1413 RR +5V
RM VEE** (Minus) +5V Minus Control Common Cathode Led Display 75492 OR 1413* Digit Drivers
OR
Note 1: For VREF = 2000V; V: 1.999V full scale. 2: For VREF = 200 mV; V: 199.9 mV full scale (change 470 k to R = 27 k 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 5-2: Display.
3-1/2 Digit LED Voltmeter with Low Component Count Using Common Cathode
(A) Crystal Oscillator Circuit
(B) LC Oscillator Circuit
10
CLK1 TC14433 L C
10
CLK1 TC14433
C1
18 M 11
CLK0 C
11
CLK0
C2
47 k
1 f = -----------------2 LC
For L = 5 mH and C = 0.01 F @ 22.5 kHz
10 pF < C1 and C2 < 200 pF
FIGURE 5-3:
Alternate Oscillator Circuits.
DS21394D-page 12
(c) 2008 Microchip Technology Inc.
TC14433/A
EOC 1/2 Clock Cycle 16,400 Clock Cycles Between EOC Pulses
DS1 1/2 Digit (MSD) 2 Clock Cycles DS2
18 Clock Cycles
DS3 DS4 LCD
FIGURE 5-4:
Digit Select Timing Diagram.
(c) 2008 Microchip Technology Inc.
DS21394D-page 13
TC14433/A
6.0
6.1
PACKAGING INFORMATION
Package Marking Information
24-Lead PDIP
XXXXXXXXXXXXXX XXXXXXXXXXXXXX XXXXXXXXXXXXXX YYWWNNN
Example:
TC14433EPG^^ e3 0814256
24-Lead SOIC (.300")
XXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXX YYWWNNN
Example:
TC14433EOG^^ e3 0814256
28-Lead PLCC
Example:
XXXXXXXXXX XXXXXXXXXX YYWWNNN
TC14433 e3 ELI^^ 0814256
Legend: XX...X Y YY WW NNN
e3
*
Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package.
Note:
In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information.
DS21394D-page 14
(c) 2008 Microchip Technology Inc.
TC14433/A
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(c) 2008 Microchip Technology Inc.
DS21394D-page 15
TC14433/A
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DS21394D-page 16
(c) 2008 Microchip Technology Inc.
TC14433/A
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(c) 2008 Microchip Technology Inc.
DS21394D-page 17
TC14433/A
6.2 Taping Form
Component Taping Orientation for 28-Lead PLCC Devices
Standard Reel Component Orientation for 713 Suffix Device Carrier Tape, Number of Components Per Reel and Reel Size Package 24-Lead PLCC Carrier Width (W) 24 mm Pitch (P) 16 mm Part Per Full Reel 750 Reel Size 330 mm
DS21394D-page 18
(c) 2008 Microchip Technology Inc.
TC14433/A
APPENDIX A: REVISION HISTORY
Revision D (July 2008)
The following is the list of modifications: 1. 2. 3. 4. 5. Changed Operating Temperature in Absolute Maximum Ratings to -40C to +85C. Added Packaging Marking information. Added Package Outline Drawings. Added Appendix A: "Revision History" Added "Product Identification System".
Revision C (January 2006)
* Undocumented changes
Revision B (May 2002)
* Undocumented changes
Revision A (March 2001)
* Original Release of this Document.
(c) 2008 Microchip Technology Inc.
DS21394D-page 19
TC14433/A
NOTES:
DS21394D-page 20
(c) 2008 Microchip Technology Inc.
TC14433/A
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. Device X Temperature Range /XX Package Examples:
a) b) c) d) e) f) TC14433ELI: TC14433TELI: TC14433EPG: TC14433TEPG: TC14433EOG: TC14433TEOG: 24LD PLCC package. Tape and Reel, 24LD PLCC package. 24LD PDIP package. Tape and Reel, 24LD PDIP package. 24LD SOIC package. Tape and Reel, 24-LD SOIC package.
Device:
TC14433: TC14433T: TC14433A: TC14433AT:
3 1/2 Digit, A/D Converter 3 1/2 Digit, A/D Converter (Tape and Reel) 3 1/2 Digit, A/D Converter 3 1/2 Digit, A/D Converter (Tape and Reel)
Temperature Range:
E
= -40C to +85C
a) b) c) d) e) f)
TC14433AELI: TC14433ATELI:
Package:
LI = Plastic Leaded Chip Carrier, Square, 28-lead PG = Plastic Dual In-Line, 600 mil Body, 24-lead OG = Plastic Small Outline, Wide 7.50 mm, 24-lead
28LD PLCC package. Tape and Reel, 28LD PLCC package. TC14433AEPG: 24LD PDIP package. TC14433ATEPG: Tape and Reel, 24LD PDIP package. TC14433AEOG: 24LD SOIC package. TC14433ATEOG: Tape and Reel, 24-LD SOIC package.
(c) 2008 Microchip Technology Inc.
DS21394D-page 21
TC14433/A
NOTES:
DS21394D-page 22
(c) 2008 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices: * * Microchip products meet the specification contained in their particular Microchip Data Sheet. Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. Microchip is willing to work with the customer who is concerned about the integrity of their code. Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable."
*
* *
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.
Trademarks The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PRO MATE, rfPIC and SmartShunt are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL, SmartSensor and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, PICkit, PICDEM, PICDEM.net, PICtail, PIC32 logo, PowerCal, PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select Mode, Total Endurance, UNI/O, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. 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. (c) 2008, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper.
Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified.
(c) 2008 Microchip Technology Inc.
DS21394D-page 23
WORLDWIDE SALES AND SERVICE
AMERICAS
Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://support.microchip.com Web Address: www.microchip.com Atlanta Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455 Boston Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088 Chicago Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075 Dallas Addison, TX Tel: 972-818-7423 Fax: 972-818-2924 Detroit Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260 Kokomo Kokomo, IN Tel: 765-864-8360 Fax: 765-864-8387 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 Santa Clara Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445 Toronto Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509
ASIA/PACIFIC
Asia Pacific Office Suites 3707-14, 37th Floor Tower 6, The Gateway Harbour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431 Australia - Sydney Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 China - Beijing Tel: 86-10-8528-2100 Fax: 86-10-8528-2104 China - Chengdu Tel: 86-28-8665-5511 Fax: 86-28-8665-7889 China - Hong Kong SAR Tel: 852-2401-1200 Fax: 852-2401-3431 China - Nanjing Tel: 86-25-8473-2460 Fax: 86-25-8473-2470 China - Qingdao Tel: 86-532-8502-7355 Fax: 86-532-8502-7205 China - Shanghai Tel: 86-21-5407-5533 Fax: 86-21-5407-5066 China - Shenyang Tel: 86-24-2334-2829 Fax: 86-24-2334-2393 China - Shenzhen Tel: 86-755-8203-2660 Fax: 86-755-8203-1760 China - Wuhan Tel: 86-27-5980-5300 Fax: 86-27-5980-5118 China - Xiamen Tel: 86-592-2388138 Fax: 86-592-2388130 China - Xian Tel: 86-29-8833-7252 Fax: 86-29-8833-7256 China - Zhuhai Tel: 86-756-3210040 Fax: 86-756-3210049
ASIA/PACIFIC
India - Bangalore Tel: 91-80-4182-8400 Fax: 91-80-4182-8422 India - New Delhi Tel: 91-11-4160-8631 Fax: 91-11-4160-8632 India - Pune Tel: 91-20-2566-1512 Fax: 91-20-2566-1513 Japan - Yokohama Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea - Daegu Tel: 82-53-744-4301 Fax: 82-53-744-4302 Korea - Seoul Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 Malaysia - Kuala Lumpur Tel: 60-3-6201-9857 Fax: 60-3-6201-9859 Malaysia - Penang Tel: 60-4-227-8870 Fax: 60-4-227-4068 Philippines - Manila Tel: 63-2-634-9065 Fax: 63-2-634-9069 Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan - Hsin Chu Tel: 886-3-572-9526 Fax: 886-3-572-6459 Taiwan - Kaohsiung Tel: 886-7-536-4818 Fax: 886-7-536-4803 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350
EUROPE
Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79 Germany - Munich Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands - Drunen Tel: 31-416-690399 Fax: 31-416-690340 Spain - Madrid Tel: 34-91-708-08-90 Fax: 34-91-708-08-91 UK - Wokingham Tel: 44-118-921-5869 Fax: 44-118-921-5820
01/02/08
DS21394D-page 24
(c) 2008 Microchip Technology Inc.

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