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PDF AS1116 Data sheet ( Hoja de datos )
| Número de pieza | AS1116 | |
| Descripción | 64 LED Driver | |
| Fabricantes | austriamicrosystems AG | |
| Logotipo |  |
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AS1116
64 LED Driver with Detailed Error Detection
Datasheet
1 General Description
The AS1116 is a compact LED driver for 64 single LEDs
or 8 digits of 7-segments. The devices can be pro-
grammed via an SPI compatible 3-wire interface.
Every segment can be individually addressed and
updated separately. Only one external resistor (RSET) is
required to set the current. LED brightness can be con-
trolled by analog or digital means.
The devices include an integrated BCD code-B/HEX
decoder, multiplex scan circuitry, segment and display
drivers, and a 64-bit memory. Internal memory stores
the shift register settings, eliminating the need for contin-
uous device reprogramming.
Additionally the AS1116 offers a diagnostic mode for
easy and fast production testing and allows the use of
the AS1116 for critical applications. The diagnostic
allows to detect individual open or shorted LEDs.
The AS1116 features a low shutdown current of typically
200nA, and an operational current of typically 350µA.
The number of digits can be programmed, the devices
can be reset by software, and an external clock is also
supported.
The device is available in a QSOP-24 and TQFN(4x4)-
24 package.
2 Key Features
! 10MHz SPI-Compatible Interface
! Open and Shorted LED Error Detection
- Global or Individual Error Detection
! Hexadecimal- or BCD-Code for 7-Segment Displays
! 200nA Low-Power Shutdown Current (typ; data
retained)
! Individual Digit Brightness Control
! Digital and Analog Brightness Control
! Display Blanked on Power-Up
! Drive Common-Cathode LED Displays
! Supply Voltage Range: 2.7 to 5.5V
! Software Reset
! Optional External Clock
! Package:
- QSOP-24 and TQFN(4x4)-24
3 Applications
The AS1116 is ideal for seven-segment or dot matrix dis-
plays in public information displays at subway, train or
bus stations, at airports and also at displays in public
transportation like buses or trains m, obile phones, per-
sonal electronic and toys.
Figure 1. Typical Application Diagram
VDD
2.7V to 5.5V
8
DIG0 to
DIG7 SEGA-DP
8
8
9.53kΩ
ISET
SDI
I/O
AS1116
GND
SDO SDI AS1116 SDO
µP
I/O
I/O
SCL LD
SCL LD
I/O
Diagnostic readback: open & shorted LEDs
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Revision 1.04
88
SDI AS1116 SDO
SCL LD
1 - 20
1 page  
AS1116
Datasheet - Typical Operating Characteristics
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7 Typical Operating Characteristics
RSET = 9.53kΩ, VRset = VDD;
Figure 3. Display Scan Rate vs. Supply Voltage;
980
Figure 4. Display Scan Rate vs. Temperature;
980
960 960
940 940
920 920
900
880
860
840
Tamb = - 40°C
Tamb = + 25°C
Tamb = + 85°C
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Vdd (V)
Figure 5. Segment Current vs. Temperature;
60
50
40
30
20
Vseg = 1.7V; Vdd = 2.7V
10 Vseg = 1.7V; Vdd = 5V
Vseg = 3V; Vdd = 5V
Vseg = 4V; Vdd = 5V
0
-40 -15 10 35 60 85
Tamb (°C)
900
880
860
Vdd = 2.7V
Vdd = 4V
Vdd = 5V
Vdd = 5.5V
840
-40 -15
10
35
60
85
Tamb (°C)
Figure 6. Segment Current vs. RSET;
50
Vseg = 4V; Vdd = 5V
Vseg = 3V; Vdd = 5V
40
Vseg = 2V; Vdd = 5V
Vseg = 1.7V; Vdd = 2.7V
30
20
10
0
0 10 20 30 40 50 60 70 80 90
Rset (kOhm)
Figure 7. Segment Current vs. Supply Voltage;
60
50
40
30
20
Vseg = 1.7V
10 Vseg = 3V
Vseg = 4V
0
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Vdd (V)
Figure 8. Segment Current vs. VDD; VRset = 2.8V
50
Vseg = 1.7V
45 Vseg = 2V
40 Vseg = 2.3V
Vseg = 3.1V
35
30
25
20
15
10
5
0
2.7 3 3.3 3.6 3.9 4.2
Vdd (V)
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Revision 1.04
5 - 20
5 Page 
AS1116
Datasheet - Detailed Description
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Table 10. Code-B Font
Char-
Register Data
Char-
Register Data
Char-
Register Data
acter D7 D6:D4 D3 D2 D1 D0 acter D7 D6: D4 D3 D2 D1 D0 acter D7 D6:D4 D3 D2 D1 D0
X 0000
X 0110
X 1100
X 0001
X 0111
X 1101
X 0010
X 1000
X 1110
X 0011
X 1001
X 1111
X 0100
X 1010
1* X X X X X
X 0101
X 1011
* The decimal point can be enabled with every character by setting bit D7 = 1.
Table 11. HEX Font
Char-
Register Data
Char-
Register Data
Char-
Register Data
acter D7 D6:D4 D3 D2 D1 D0 acter D7 D6: D4 D3 D2 D1 D0 acter D7 D6:D4 D3 D2 D1 D0
X 0000
X 0110
X 1100
X 0001
X 0111
X 1101
X 0010
X 1000
X 1110
X 0011
X 1001
X 1111
X 0100
X 1010
1* X X X X X
X 0101
X 1011
* The decimal point can be enabled with every character by setting bit D7 = 1.
Table 12. No-Decode Mode Data Bits and Corresponding Segment Lines
D7 D6 D5 D4 D3 D2 D1 D0
Corresponding Segment Line
DP
A
B
C
D
E
F
G
Figure 19. Standard 7-Segment LED
F AB
G
ED
C
DP
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Revision 1.04
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| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet AS1116.PDF ] | |
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