TC7106 데이터 시트보기 (PDF) - TelCom Semiconductor, Inc
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TC7106 Datasheet PDF : 19 Pages
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3-1/2 DIGIT A/D CONVERTERS
1 TC7106
TC7106A
TC7107
TC7107A
fewer segments are “ON,” each “ON” output drops more
voltage and current. For the best case of six segments (a
“111” display) to worst case (a “1888” display) the resistor
will change about 230mW, while a circuit without the resistor
will change about 470mW. Therefore, the resistor will re-
duce the effect of display dissipation on reference voltage
drift by about 50%.
The change in LED brightness caused by the resistor is
almost unnoticeable as more segments turn off. If display
brightness remaining steady is very important to the de-
signer, a diode may be used instead of the resistor.
Figure 15. Diode or Resistor Limits Package Power Dissipation
APPLICATIONS INFORMATION
+5V
IN
–5V
+
–
24kΩ
1 MΩ
150Ω
TP3
1kΩ
0.47
100
pF
TP5
0.01
µF
µF 0.22
µF
TP2
0.1
DISPLAY
100
kΩ
TP1
µF
47
kΩ
40
30
TP
21
4
TC7107A
1
10
20
5.1Ω 1/4W
1N4001
DISPLAY
APPLICATIONS INFORMATION
Liquid Crystal Display Sources
2
Several LCD manufacturers supply standard LCD dis-
plays to interface with the TC7106A 3-1/2 digit analog-to-
digital converter.
Manufacturer
Crystaloid
Electronics
Address/Phone
5282 Hudson Dr.
Hudson, OH 44236
216/655-2429
Part Numbers1
C5335, H5535,
3
T5135, SX440
AND
720 Palomar Ave.
Sunnyvale, CA 94086
408/523-8200
FE 0201,0701
FE 0203, 2201
FE 0501
Epson
Hamlin, Inc.
3415 Kashikawa St.
Torrance, CA 90505
213/534-0360
612 E. Lake St.
Lake Mills, WI 53551
414/648-2361
LD-B709BZ
LD-H7992AZ
4
3902, 3933, 3903
Note: 1. Contact LCD manufacturer for full product listing/specifications.
Light Emitting Diode Display Sources
5 Several LED manufacturers supply seven segment
digits with and without decimal point annunciators for the
TC7107A.
Manufacturer Address
Display Type
Hewlett-Packard 640 Page Mill Rd.
LED
Components
Palo Alto, CA 94304
AND
720 Palomar Ave.
LED
Sunnyvale, CA 94086
6
7
TELCOM SEMICONDUCTOR, INC.
8
3-197
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