TC7106CLW713 Microchip Technology, TC7106CLW713 Datasheet - Page 19
TC7106CLW713
Manufacturer Part Number
TC7106CLW713
Description
IC ADC 3 1/2DGT LCD DVR 44-PLCC
Manufacturer
Microchip Technology
Datasheet
1.TC7107CPL.pdf
(34 pages)
Specifications of TC7106CLW713
Display Type
LCD
Configuration
7 Segment
Digits Or Characters
A/D 3.5 Digits
Current - Supply
800µA
Voltage - Supply
9V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Request inventory verification / Request inventory verification
Interface
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC7106CLW713
Manufacturer:
Microchip Technology
Quantity:
10 000
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 230 mW, while
a circuit without the resistor will change about 470 mW.
Therefore, the resistor will reduce 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 designer, a diode may be used instead of the
resistor.
FIGURE 9-4:
Package Power Dissipation.
© 2008 Microchip Technology Inc.
TP5
40
100
kΩ
1
5.1 Ω 1/4W
100 pF
1N4001
24 kΩ
TP1
TP2
1 kΩ
+5V
0.1
µ
F
1 MΩ
TP3
TC7107A
Diode or Resistor Limits
+
10
Display
0.01
µ
IN
F
30
–
kΩ
0.47
47
µ
F
TP
0.22
4
µ
F
-5V
Display
20
21
150Ω
TC7106/A/TC7107/A
DS21455D-page 19