AS1100PL austriamicrosystems, AS1100PL Datasheet - Page 11

• Manufacturer Part Number: AS1100PL
• Description: IC LED 8-DIGIT DRIVER 24-PDIP
• Manufacturer: austriamicrosystems

Specifications of AS1100PL

• Display Type: LED
• Configuration: 7 Segment + DP
• Interface: Serial
• Digits Or Characters: 8 Digits
• Current - Supply: 330mA
• Voltage - Supply: 4 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 24-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AS1100
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9 Application Information
9.1 Supply Bypassing and Wiring
In order to achieve optimal performance the AS1100 shall be placed very close to the LED display to minimize effects of electromagnetic
interference and wiring inductance. Furthermore, it is recommended to connect a 10µF electrolytic and a 0.1µF ceramic capacitor between V
and GND to avoid power supply ripple. Also, both GNDs must be connected to ground.
9.2 Selecting R
The current through the segments is controlled via the external resistor R
values for ISET are given in
be used. In that case it is no longer necessary that the AS1100 drives high currents. A recommended value for R
AS1100 only drives few digits,
to calculate acceptable limits for ambient temperature, segment current, and the LED forward-voltage drop.
Table 15. R
9.3 8x8 LED Dot Matrix Driver
The example in
DIG0-7 outputs. The rows are connected to the segment drivers. Each of the 64 LEDs can be addressed separately. The columns are selected
via the digits as shown in
in a column can be addressed as stated in
Note: For a multiple-digit dot matrix, multiple AS1100 devices must be cascaded.
Figure 7. Application Example as LED Dot Matrix Driver
www.austriamicrosystems.com/LED-Driver-ICs/AS1100
µP
SET
Figure 7
vs. Segment Current and LED Forward Voltage
I
SEG
40
30
20
10
(mA)
SET
uses the AS1100 to drive an 8x8 LED dot matrix. The LED columns have common cathode and are connected to the
Table
12
13
1
9
Resistor and Using External Drivers
Table
LOAD
DIN
CLK
GND
Table 12
5. The decode mode register (0xX9) has to be programmed to ‘00000000’ as stated in Table 4. The single LEDs
SEG A:G
SEG DP
15. The maximum current the AS1100 can drive is 40mA. If higher currents are needed, external drivers must
GND
SEG G
SEG D
SEG C
SEG F
SEG E
SEG B
SEG A
SEG DP
AS1100
specifies the maximum currents and R
DIG 0
4
DIG0:7
Table
DOUT
VDD
ISET
9, where D0 corresponds to segment G and D7 corresponds to segment DP.
12.2kΩ
17.8kΩ
29.8kΩ
66.7kΩ
19
1.5
24
18
9.53kΩ
Revision 1.36
11.8kΩ
17.1kΩ
28.0kΩ
63.7kΩ
2.0
SET
. Segment current is about 100 times the current in ISET. The right
SET
DIG 7
must be set accordingly. Refer to absolute maximum ratings
12
13
1
9
DIN
LOAD
CLK
GND
V
11.0kΩ
15.8kΩ
25.9kΩ
59.3kΩ
SEG A:G
SEG DP
LED
2.5
(V)
SEG G
SEG E
SEG D
SEG C
SEG B
SEG A
GND
SEG F
SEG DP
AS1100
DIG 0
DIG0:7
4
VDD
ISET
10.6kΩ
15.0kΩ
24.5kΩ
55.4kΩ
18
19
SET
3.0
is 47kΩ. In cases that the
9.53kΩ
9.69kΩ
14.0kΩ
22.6kΩ
51.2kΩ
3.5
DIG 7
11 - 17
DD