參數(shù)資料
型號: TC7107ACPLIJL
元件分類: ADC
英文描述: 1-CH DUAL-SLOPE ADC, PDIP40
封裝: CERDIP-40
文件頁數(shù): 7/21頁
文件大?。?/td> 269K
代理商: TC7107ACPLIJL
15
TC7106
TC7106A
TC7107
TC7107A
3-1/2 DIGIT A/D CONVERTERS
In addition to limiting maximum power dissipation, the
resistor reduces the change in power dissipation as the
display changes. This effect is caused by the fact that, as
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.
TP2
TP5
100
k
TP1
24k
1k
0.1
F
TP3
0.01
F
+
IN
0.22
F
DISPLAY
100
pF
+5V
1 M
–5V
150
0.47
F
TC7107A
40
TP
4
30
21
20
10
1
47
k
1N4001
5.1
1/4W
Figure 15. Diode or Resistor Limits Package Power Dissipation
APPLICATIONS INFORMATION
Liquid Crystal Display Sources
Several LCD manufacturers supply standard LCD dis-
plays to interface with the TC7106A 3-1/2 digit analog-to-
digital converter.
Manufacturer
Address/Phone
Part Numbers1
Crystaloid
5282 Hudson Dr.
C5335, H5535,
Electronics
Hudson, OH 44236
T5135, SX440
216/655-2429
AND
720 Palomar Ave.
FE 0201,0701
Sunnyvale, CA 94086
FE 0203, 2201
408/523-8200
FE 0501
Epson
3415 Kashikawa St.
LD-B709BZ
Torrance, CA 90505
LD-H7992AZ
213/534-0360
Hamlin, Inc.
612 E. Lake St.
3902, 3933, 3903
Lake Mills, WI 53551
414/648-2361
Note: 1. Contact LCD manufacturer for full product listing/specifications.
Light Emitting Diode Display Sources
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
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