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TC14433AEPG Datasheet(PDF) 11 Page - Microchip Technology

Part # TC14433AEPG
Description  3-1/2 Digit, Analog-to-Digital Converter
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC14433AEPG Datasheet(HTML) 11 Page - Microchip Technology

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© 2002 Microchip Technology Inc.
DS21394B-page 11
TC14433/A
FIGURE 4-2:
3-1/2 DIGIT LED VOLTMETER WITH LOW COMPONENT COUNT USING
COMMON CATHODE DISPLAYS
FIGURE 4-3:
ALTERNATE OSCILLATOR CIRCUITS
CLK1
CLK0
OR
TC14433
Input
VX
300k
Resitor Network
or Individual
Resistor*
R
+5V
Minus
Control
+5V
RM
Common
Cathode
Led Display
75492
OR
1413*
Digit Drivers
VEE**
(Minus)
Alternate Overrange Circuit
with Separated LED
+5V
OR
1/6
1/7
1413
75492
RR
OR
B1
A
B
C
D
LT
LE
I4511B
RDP
VIN
+5V
VOUT
VSS
1
µF
20k
MCP1525
470k 0.1
µF 0.1µF
C01 C02
R1 R1/C C1
VX
VAG
DU
EOE
VREF
VSS
VSS
VDD
VDD
VEE
Q0
Q1
Q2
DS4 DS3 DS2 DS1
a
b
c
d
e
f
g
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.
(B) LC Oscillator Circuit
10
L
C
11
C
For L = 5mH and C = 0.01
µF, f
32kHz
10pF < C1 and C2 < 200pF
TC14433
TC14433
CLK1
C1
C2
CLK0
CLK1
CLK0
11
10
18M
47k
(A) Crystal Oscillator Circuit
f =
1
π
2
2/LC


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