AMS AS1107 Power Management Datasheet
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austriamicrosystems AG is now ams AG
The technical content of this austriamicrosystems datasheet is still valid.
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ams AG
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D a t a s h e e t
A S 11 0 6 , A S 11 0 7
8 - D i g i t L E D D i s p l a y D r i v e r s
1 General Description 2 Key Features
The AS1106 and the AS1107 are compact display drivers for 7segment numeric displays of up to 8 digits. The devices can be programmed via SPI, QSPI, and Microwire as well as a conventional
4-wire serial interface.
10MHz SPI-, QSPI-, Microwire-Compatible Serial I/O
Individual LED Segment Control
Segment Blinking Control (can be synchronized across multiple drivers)
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 LED settings, eliminating the need for continuous device reprogramming.
Every segment can be individually addressed and updated separately. Only one external resistor (R
SET
) is required to set the
Hexadecimal- or BCD-Code/No-Decode Digit Selection
3µA Low-Power Shutdown Current (typ; data retained)
Extremely Low Operating Current 0.5mA in Open-Loop
Digital and Analog Brightness Control
Display Blanked on Power-Up
valid
Drive Common-Cathode LED Displays current through the LED display. LED brightness can be controlled by analog or digital means. The devices can be programmed to use the internal code-B/HEX decoder to display numeric digits or to directly address each segment.
The AS1106 and the AS1107 feature an extremely low shutdown current of typically 3µA, and an operational current of less than
500µA. The number of digits can be programmed, the devices can be reset by software, and an external clock is also supported.
Additionally, segment blinking can be synchronized across multiple drivers.
Low-EMI Low Slew-Rate Limited Segment
Drivers (AS1107)
Supply Voltage Range: 2.7 to 5.5V
Software Reset
AG
3 Applications
still
Several test modes are available for easy application debugging.
The devices are available in a SOIC 24-pin package.
ams
The AS1106 and AS1107 are ideal for bar-graph displays, instrument-panel meters, LED matrix displays, dot matrix displays, set-top boxes, white goods, professional audio equipment, medical equipment, industrial controllers and panel meters.
content
+5V
VDD
9.53k
Ω
8 Digits
ISET
DIG0 to
DIG7
DIN
I/O
LOAD/CSN
I/O
CLK
SCK
Microprocessor
GND
Technical
AS1106/
AS1107
GND
SEG A to G
SEP DP
8 Segments
8-Digit Microprocessor Display
1 - 20 www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
AS1106, AS1107
Datasheet - P i n A s s i g n m e n t s
4 Pin Assignments
Figure 2. Pin Assignments (Top View)
DIN
DIG 0
DIG 4
GND
DIG 6
DIG 2
DIG 3
DIG 7
GND
DIG 5
9
10
DIG 1
LOAD/CSN
11
12
6
7
8
3
4
5
1
2
24
23
DOUT
SEG D
22
21
SEG DP
SEG E
20 SEG C
19
18
VDD
ISET
17 SEG G
16 SEG B
15
14
SEG F
SEG A
AG still valid
4.1 Pin Descriptions
Table 1. Pin Descriptions
Pin Number
1
2, 3, 5, 6, 7, 8, 10,
11
Pin Name
DIN
DIG 0:DIG 7
ams
Serial-Data Input
. Data is loaded into the internal 16-bit shift register on the rising edge of pin CLK.
Digit Drive Lines
. 8 Eight-digit drive lines that sink current from the display common cathode. The AS1106 pulls the digit outputs to V
DD
when turned off. The AS1107 digit drivers are high-impedance when turned off.
4, 9 GND
Ground
. Both GND pins must be connected.
Load-Data Input
(AS1106 only). The last 16 bits of serial data are latched on the rising edge of this pin.
12
13
LOAD/CSN
CLK
Chip-Select Input
(AS1107 or AS1106 SPI-enabled only). Serial data is loaded into the shift register while this pin is low. The last 16 bits of serial data are latched on the rising edge of this pin.
Serial-Clock Input
. 10MHz maximum rate. Data is shifted into the internal shift register on the rising edge of this pin. Data is clocked out of pin DOUT on the falling edge of this pin. On the AS1107 or AS1106 SPI-enabled, the CLK input is active only while LOAD/CSN is low.
14, 15, 16, 17, 20,
18
ISET
Seven Segment and Decimal Point Drive Lines
. 8 seven-segment drives and decimal point drive that source current to the display. On the AS1106, when a segment driver is
. Connect to V
DD
through R
SET
to set the peak segment current (see
Selecting R SET Resistor Value and Using External Drivers on page 14 ).
19
VDD
24
DOUT
Positive Supply Voltage
. Connect to +2.7 to +5.5V supply.
Serial-Data Output
. The data into pin DIN is valid at pin DOUT 16.5 clock cycles later. This pin is used to daisy-chain several AS1106/AS1107 devices and is never high-impedance.
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AS1106, AS1107
Datasheet - A b s o l u t e M a x i m u m R a t i n g s
5 Absolute Maximum Ratings
is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Table 2. Absolute Maximum Ratings
Min Max Units Notes Parameter
Electrical Parameters
VDD to GND -0.3
V
Electrostatic Discharge
Digital outputs
All other pins
Continuous Power Dissipation (TA = +85°C)
7
V
DD
+ 0.3
(max 7V)
Current
All other pins to GND
DIG 0:DIG 7 Sink Current
SEG A:SEG G, SEG DP
Latch-Up Immunity
Wide SOIC
-0.3
500
100
±200
V mA mA mA
1000
1000
941
V
AG
All pins except AS1106 pin 14: ±180 mA
valid
Norm: JEDEC 78
still
Derate 11.8mW/ºC above +70ºC
Temperature Ranges and Storage Conditions
Storage Temperature Range
Package Body Temperature (Wide SOIC)
-55
ams
+150
+260
ºC
The reflow peak soldering temperature (body
85
ºC
%
Classification for Non-Hermetic Solid State Surface
Mount Devices”.
matte tin (100% Sn).
Non-condensing 5 temperature) specified is in accordance with
IPC/
JEDEC J-STD-020 “Moisture/Reflow Sensitivity
Humidity
3 Represents a max. floor life time of 168h
Moisture Sensitive Level
Technical
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3 - 20
AS1106, AS1107
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
6 Electrical Characteristics
V
DD
= 2.7V to 5.5V, R
SET
= 9.53k
Ω
±1%, T
AMB
= T
MIN
to T
MAX
(unless otherwise specified). All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Qualification Control) methods.
Table 3. Electrical Characteristics
Symbol
T
AMB
V
DD
Parameter
Operating Temperature Range
Operating Supply Voltage
Conditions Min
-40
2.7
Typ Max
5.0
+85
5.5
Unit
ºC
V
I
DDSD
I
DD f
OSC
I
DIGIT
I
SEG
∆
I
SEG
/
∆ t
∆
I
SEG
I
DIGIT
I
SEG
I
DIGIT
I
SEG t
SLOWBLINK t
FASTBLINK
Shutdown Supply Current
All digital inputs at V
DD
or GND,
T
AMB
= +25ºC
Operating Supply Current
Display Scan Rate
R
SET
= open circuit.
All segments and decimal point on;
I
SEG
= -40mA.
8 digits scanned
Digit Drive Sink Current
V
OUT
= 0.65V
Segment Drive Source Current
Segment Current Slew Rate
(AS1107 only)
Segment Drive Current Matching
Digit Drive Leakage
(AS1107 only)
Segment Drive Leakage
(AS1107 only)
V
DD
= 5.0V, V
OUT
= (V
DD
-1V)
T
AMB
= +25ºC, V
DD
= 5.0V,
V
OUT
= (V
DD
-1V)
Digit off, V
AG
DD
Segment off, V
SEG
= 0V
Digit Drive Source Current
(AS1106 only)
Segment Drive Sink Current
(AS1106 only)
Slow Segment Blink Period (ON phase,
Internal Oscillator)
Fast Segment Blink Period
(ON phase, Internal Oscillator)
Fast or Slow Segment Blink Duty Cycle
(Guaranteed by design)
Digit off, V
DIGIT
= (V
DD
- 0.3V)
Segment off, V
SEG
= 0.3V
content
-2
5
0.64
0.32
49.9
-30
10
320
500
330
10
1
800 1300
20
3.0
1
0.5
50
-45
50
-10
1
1.65
0.83
50.1
s
% mA
µA mA
Hz mA
valid
mA/µs
%
µA
µA mA mA s
Table 4. Logic Inputs/Outputs Characteristics
Symbol
I
IH
V
, I
IH
IL
Parameter
Input Current DIN, CLK, LOAD/CSN
Logic High Input Voltage
V
IL
Logic Low Input Voltage
V
OH
V
OL
∆
V
I
Output High Voltage
Technical
Conditions
V
IN
= 0V or V
DD
V
DD
= 5.0V ± 10%
V
DD
= 3.0V ± 10%
DOUT, I
SOURCE
= -1mA,
V
DD
= 5.0V ± 10%
DOUT, I
SOURCE
= -1mA,
V
DD
= 3.0V ± 10%
DOUT, I
SINK
= 1.6mA
DIN, CLK, LOAD/CSN
Min
-1
0.7 x V
DD
V
DD
- 1
V
DD
- 0.5
Typ
1
Max
1
0.8
0.6
0.4
Unit
µA
V
V
V
V
V www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
4 - 20
AS1106, AS1107
Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s
Table 5. Timing Characteristics (see Figure 12 on page 8)
Symbol
t t t t t t t t
CP
CH
CL
CSH t
CSS
DS t
DH t
DO
LDCK
CSW
DSPD
Parameter
CLK Clock Period
CLK Pulse Width High
CLK Pulse Width Low
CSM Fall to CLK Rise Setup Time
(AS1107 or AS1106 SPI-programmed)
CLK Rise to LOAD/CSN Rise
Hold Time
DIN Setup Time
DIN Hold Time
Output Data Propagation Delay
LOAD Rising Edge to Next Clock Rising Edge
(AS1106 only)
Minimum LOAD/CSN Pulse High
Data-to-Segment Delay
Conditions
C
LOAD
= 50pF
AG
Typ Max Min
100
50
50
25
Unit
ns ns ns ns
50
50
0
25
0 ns
25
2.25
still
ns ns ns ns ns ms
valid
Technical
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5 - 20
AS1106, AS1107
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
7 Typical Operating Characteristics
V
DD
= 5V, R
SET
= 9.53k
Ω
, T
AMB
= 25ºC (unless otherwise specified).
Figure 3. Scan Frequency vs.Temperature
990
Figure 4. Scan Frequency vs. V
DD
980
970
980
960
970
960
950
940
930
950
920
940
910
930
50
45
40
35
30
25
20
-40 -20 0
T
AMB
[°C]
Figure 5. I
SEG
vs. Temperature
20 40 60
V
DD
= 5V, V
OUT
= 2.4V
80
ams
900
60
2
AG
DD
3
50
40
30
20
15
V
DD
= 5V, V
OUT
= 4V
V
DD
= 2.7V, V
OUT
= 2V
V
DD
= 2.7V, V
OUT
= 2.4V
V
OUT
= 1.7V
10
V
OUT
= 2.4V
V
DD
(V)
4
V
OUT
= 4V
5
0
-40 -20 0 20
T
AMB
(°C)
40 60 80
2 2.5
3 3.5
4 4.5
5 5.5
6
V
DD
(V)
6
valid
Technical
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6 - 20
AS1106, AS1107
Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s
Figure 7. AS1106 Segment Output Current
Intensity = 31/32 (0Fh)
50
45
40
35
30
25
Figure 8. AS1107 Segment Output Current
Intensity = 15/16 (0Fh)
50
45
40
35
30
25
20 20
15
10
5
0
0.0
5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0
Figure 9. I
SEG
vs. V
OUT
50
45
40
35
30
25
20
15
10
5
0
Time (µs)
R
SET
= 10k
Ω
R
SET
= 20k
Ω
R
SET
= 40k
Ω
ams
0 0.5
1 1.5
2 2.5
3 3.5
4 4.5
5
15
10
5
0
0.0
5.0 10.0 15.0 20.0 25.0 30.0 35.0 40.0
Time (µs)
Figure 10. I
SEG
vs. V
OUT
25
20
15
AG
V
DD
= 2.7V
R
SET
= 10k
Ω
still valid
10
5
0 0.5
1
R
SET
= 20k
Ω
R
SET
= 40k
Ω
1.5
2 2.5
V
OUT
(V) V
OUT
(V)
Figure 11. I
SEG
vs. R
SET
60
V
OUT
= 2.4V
50
40
V
OUT
= 4V
30
V
OUT
= 2V
V
DD
= 5V
20
10
0
Technical
0 10 20 30 40 50 60 70 80
R
SET
(k
Ω
) www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
7 - 20
AS1106, AS1107
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
8.1 AS1106 vs. AS1107
The AS1106 and AS1107 are identical except for two features:
The AS1107 segment drivers are slew-rate limited to reduce electromagnetic interference (EMI).
The AS1107 serial interface is fully SPI compatible (programmable for AS1106).
8.2 Serial-Addressing Format
serial interface. A programming sequence consists of 16-bit packages as listed in Table 6
. latched into a digit- or control-register. The LOAD/CSN signal must go high after the 16th rising clock edge.
The LOAD/CSN signal can also come later but this must happen just before the next rising edge of CLK, otherwise the data will be lost. The contents of the internal shift register are applied 16.5 clock cycles later to pin DOUT. The data is clocked out at the falling edge of CLK.
The first 4 bits (D15:D12) are “don't care”, bits D11:D8 contain the register address, and bits D7:D0 contain the data. The first bit is D15, the most
significant bit (MSB). The exact timing is shown in Figure 12
.
Table 6. 16-Bit Serial Data Format
D15 D14 D13 D12
X X X X
D11 D10 D9 D8
Register Address (see Table 7 )
D4
Data
D1
8.3 Initial Power-Up
AG
On initial power-up, the AS1106/AS1107 registers are reset to their default values, the display is blanked, and the device goes into shutdown mode. At this time, all registers should be programmed for normal operation.
D7 D6 D5 D0
LSB
Note:
is set to the minimum values.
Figure 12. Interface Timing
LOAD/CSN
content
t
CSW t
CSH t
CP t
CSS t
LDCK t
CL t
CH
CLK t
DS t
DH
D15
DIN
D14 D1 D0 t
DO www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
8 - 20
AS1106, AS1107
Datasheet - D e t a i l e d D e s c r i p t i o n
8.4 Shutdown Mode
The AS1106/AS1107 devices feature a shutdown mode, where they consume only 10µA (max) current. Shutdown mode is entered via a write to the Shutdown Register (see
). For the AS1106, at that point, all segment current sources are pulled to ground and all digit drivers are connected to V
DD
, so that all segments are blanked. The AS1107 behavior is identical except the drivers are high impedance.
Note:
During shutdown mode the Digit-Registers maintain their data.
Shutdown mode can either be used as a means to reduce power consumption or for generating a flashing display (repeatedly entering and leaving shutdown mode). For minimum supply current in shutdown mode, logic input should be at GND or V
DD
(CMOS logic level).
The devices need typically 250µs to exit shutdown mode, and during shutdown mode the AS1106/AS1107 is fully programmable. Only the
display test mode (see page 11) overrides shutdown mode.
0.
1
Note:
ter.
valid
8.5 Digit- and Control-Registers
address word, and communication is done via the serial interface.
Digit Registers – These registers are realized with an on-chip 64-bit memory. Each digit can be controlled directly without rewriting the whole register contents. tures selection registers.
Table 7. Register Address Map
AG still
Register
No-Op
Digit 0
Digit 1
Digit 2
Digit 3
Digit 4
Digit 5
Digit 6
Digit 7
Decode-Mode
Intensity Control
Scan Limit
Shutdown
N/A
0xX5
0xX6
0xX7
0xX8
0xX9
0xXA
0xXB
0xXC
0xXD
HEX Code
0xX0
0xX1
0xX2
0xX3
D15:D12 ams
X
D11
0
0
0
0
Address
D10
0
0
0
0
D9
0
1
1
0
0xX4 X 0 1 0
Feature
Display Test
0xXE
0xXF
Technical
X
X
X
X
X
X
X
X
X
X
X
1
1
1
1
0
1
0
0
1
1
1
0
1
0
0
1
0
1
1
1
1
1
1
0
0
1
1
0
0
1
0
1
1
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
1
0
1
0
1
1
0
1
0
1
0
1
0
1
0
D8
0
Page
1. When Shutdown Register
bit D7 = 1, the
Feature Register
is left unchanged when entering or leaving shutdown mode.
9 - 20 www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
AS1106, AS1107
Datasheet - D e t a i l e d D e s c r i p t i o n
8.5.1 Shutdown Register (0xXC)
The Shutdown Register controls AS1106/AS1107 shutdown mode (see Shutdown Mode on page 9).
Table 8. Shutdown Register Format (Address (HEX) = 0xXC))
Mode HEX Code
Register Data
D7 D6 D5 D4 D3 D2 D1 D0
Shutdown Mode,
Reset Feature Register to Default Settings
Shutdown Mode, Feature Register Unchanged
Normal Operation,
Reset Feature Register to Default Settings
Normal Operation, Feature Register Unchanged
0x00
0x80
0x01
0x81
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
1
1
8.5.2 Decode Enable Register (0xX9)
or no-decode for each digit. Each bit in the Decode Enable Register corresponds to its respective display digit (i.e., bit D0 corresponds to digit 0,
Note:
A logic high enables decoding and a logic low bypasses the decoder altogether.
When decode mode is used, the decoder looks only at the lower-nibble (bits D3:D0) of the data in the Digit-Registers, disregarding bits D6:D4. code-B font;
AG
shows the 1:1 pairing of each data bit to the appropriate segment line.
Table 9. Decode Enable Register Format (Address (HEX) = 0xX9))
still
Code-B/HEX
Decode Mode
No decode for digits 7:0
ams
Code-B/HEX decode for digits 7:0
HEX Code
0x00
0x01
0x0F
0xFF
Register Data
D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 0 0 0
0
0
1
0
0
1
0
0
1
0
0
1
0
1
1
0
1
1
0
1
1
1
1
1
E
F
A
G
B
C
D
DP
Table 10. Code-B Font
Technical
1
2
D7
†
X
X
0
0
0
0
0
D2
3 X 0 0
4 X 0 1
D1
1
1
0
0
0
D0
0
1
0
1
0
DP
†
A
1
1
1
0
0
1
1
1
1
B
1
0
1
1
1
1
On Segments = 1
C D E
1
0
1
1
0
1
0
1
0
0
0
0
1
0
F
1
G
1
1
0
0
1
10 - 20 www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
AS1106, AS1107
Datasheet - D e t a i l e d D e s c r i p t i o n
Table 10. Code-B Font (Continued)
D7
†
Register Data
7-Segment Character
9
-
7
8
E
5
6
D6:D4
X
X
X
X
X
X
X
H
L
P
X
X
X
Blank X 1
†
The decimal point is enabled by setting bit D7 = 1.
1
1
1
1
1
0
1
1
D3
0
0
0
0
1
0
0
D2
1
1
1
1
1
1
0
0
1
1
0
1
1
0
1
D1
0
1
0
1
0
1
1
0
1
0
1
D0
1
0
DP
†
0
0
1
0
1
0
1
1
1
A
1
1
1
0
1
0
1
0
1
1
0
0
0
B
Table 11. HEX Font
7-Segment Character
2
3
0
1
4
5
6
C d
E
9
A
7
8 b
D7
†
D6:D4
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
1
F X 1
†
The decimal point is enabled by setting bit D7 = 1.
0
0
0
0
Register Data
D3 D2
0
0
0
0
1
1
B
1
1
1
1
1
0
1
1
0
0
1
1
1
1
1
1
ams
1
1
0
1
1
0
1
0
1
1
1
0
1
1
1
1
0
1
1
0
1
0
1
0
1
1
0
1
1
1
0
0
1
1
1
0
0
1
1
D1
1
1
0
0
0
0
1
1
1
0
1
D0
0
1
0
1
0
1
DP
AG
†
1
0
1
1
0
1
A
0
1
1
1
0
0
C
0
1
1
1
1
1
1
1
0
0
1
0
0
1
1
0
1
1
D
1
1
1
0
1
1
1
0
On Segments = 1
1
0
0
0
1
0
1
1
0
C
1
1
0
1
0
0
1
0
0
1
1
D
1
1
1
1
1
0
0
0
0
1
1
E
0
1
1
1
0
1
1
1
1
1
F
0
0
1
0
1
0
1
1
1
1
0
1
1
1
1
1
G
1
1
0
0
0
1
1
1
0
1
0
1
1
0
0
1
E
1
0
1
0
1
1
1
1
Table 12. No-Decode Mode Data Bits and Corresponding Segment Lines
Corresponding Segment Line
D7
DP
D6
A
D5
B
D4
C
D3
D
D2
E
D1
F
D0
G
8.5.3 Display-Test Register (0xXF)
The AS1106/AS1107 devices can operate in two modes: normal mode and display test mode. In display test mode all LEDs are switched on at maximum brightness (duty cycle is 15/16 (AS1106) or 31/32 (AS1107). The devices remain in display-test mode until the Display-Test Register is set for normal operation.
Note:
Technical
Mode
D7 D6 D5
Register Data
D4 D3 D2 D1 D0
Normal Operation
Display Test Mode
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
1
1
1
0
1
0
0
1
1
1
1
F
1
1
0
1
1
G
1
1
1
0
1
0
valid
11 - 20 www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
AS1106, AS1107
Datasheet - D e t a i l e d D e s c r i p t i o n
8.5.4 Intensity Control Register (0xXA)
The brightness of the display can be controlled by digital means using the Intensity Control Register and by analog means using R
SET
(see
Selecting R SET Resistor Value and Using External Drivers on page 14 ).
Display brightness is controlled by an integrated pulse-width modulator which is controlled by the lower-nibble of the Intensity Control Register.
The modulator scales the average segment-current in 16 steps from a maximum of 31/32 down to 1/32 (15/16 to 1/16 for the AS1107) of the peak current set by R
SET
.
Table 14. Intensity Register Format (Address (HEX) = 0xXA))
Duty Cycle
AS1106
1/32 (min on)
AS1107
1/16 (min on)
3/32
5/32
7/32
9/32
2/16
3/16
4/16
5/16
11/32
13/32
15/32
17/32
19/32
21/32
23/32
25/32
27/32
29/32
31/32 (max on)
6/16
7/16
8/16
9/16
10/16
11/16
12/16
13/16
14/16
15/16
15/16 (max on)
HEX Code
0xX8
0xX9
0xXA
0xXB
0xXC
0xXD
0xXE
0xXF
0xX0
0xX1
0xX2
0xX3
0xX4
0xX5
0xX6
0xX7
X
X
X
X
X
X
X
X
X
X
X
X
X
D7
X
X
X
X
X
X
X
D6
X
X
X
X
X
X
X
AG
X
X
X
X
X
X
X
X
X
X
X
X
X
D5
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Register Data
D4 D3
X
X
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
1
1
0
1
0
0
1
1
0
1
D2
0
0
0
1
1
0
0
1
1
0
0
0
1
1
0
D1
0
0
1
0
1
0
1
0
1
0
1
D0
1
0
1
0
1
0
1
0
valid
8.5.5 Scan-Limit Register (0x0B)
800Hz. If the number of digits displayed is reduced, the update frequency is increased. The frequency can be calculated using 8fOSC/N, where
N is the number of digits. Since the number of displayed digits influences the brightness, R
SET
should be adjusted accordingly.
lists the maximum allowed current when fewer than 4 digits are used.
Note: content
Table 15. Scan-Limit Register Format (Address (HEX) = 0xXB))
Register Data
Scan Limit HEX Code
D7 D6 D5 D4 D3 D2 D1 D0
Display digit 0 only (see
Display digits 0:1 (see
)
Display digits 0:2 (see
)
Display digits 0:3
Display digits 0:4
Display digits 0:5
Display digits 0:6
Display digits 0:7
0xX0
0xX1
0xX2
0xX3
0xX4
0xX5
0xX6
0xX7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
Number of Digits Displayed
1
2
3
Maximum Segment Current (mA)
10
20
30 www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
12 - 20
AS1106, AS1107
Datasheet - D e t a i l e d D e s c r i p t i o n
8.5.6 Feature Register (0xXE)
The Feature Register is used for enabling various features including switching the device into external clock mode, applying an external reset, selecting code-B or HEX decoding, enabling or disabling blinking, enabling or disabling the SPI-compatible interface (AS1106 only), setting the blinking rate, and resetting the blink timing.
Note:
At power-up the Feature Register is initialized to 0.
Table 17. Feature Register Summary
D7 D6 D5 D4 D3 D2 D1 D0
D3
D4
D2 blink_ blink_
Bit
D0
D1
Bit Name
clk_en reg_res sync
Default
0
0
Access
R/W
R/W blink_en
Enables and disables various device features.
External clock active.
spi_en decode_sel
Bit Description
Resets all control registers except the Feature Register.
0 = Reset Disabled. Normal operation.
AG
0 = Enable Code-B decoding (see Table 10 on page 10).
1 = Enable HEX decoding (see Table 11 on page 11).
reg_res clk_en start
Table 18. Feature Register Bit Descriptions (Address (HEX) = 0xXE))
Addr: 0xXE
freq_sel
Feature Register
0 = Internal oscillator is used for system clock.
1 = Pin CLK of the serial interface operates as system clock input.
still
Note:
The Digit Registers maintain their data.
valid
decode_sel
0 R/W spi_en blink_en
D5 blink_freq_sel
D6
D7 sync blink_start
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
Enables the SPI-compatible interface.
0 = Disable SPI-compatible interface (AS1106 only).
ams
1 = Enable blinking.
0 = Blink period typically is 1 second (0.5s on, 0.5s off).
1 = Blink period is 2 seconds (1s on, 1s off).
Synchronizes blinking on the rising edge of pin LOAD/CSN. The multiplex and blink timing counter is cleared on the rising edge of pin LOAD/CSN. By setting this bit in multiple AS1106/AS1107 devices, the blink timing can be synchronized across all the devices.
Start Blinking with display enabled phase. When bit D4 (blink_en) is set, bit D7 determines how blinking starts.
0 = Blinking starts with the display turned off.
1 = Blinking starts with the display turned on.
8.5.7 No-Op Register (0xX0)
Technical
no-operation commands. When the LOAD/CSN signal goes high, all shift registers are latched. The first four devices will receive no-operation commands and only the fifth device will receive the intended operation command, and subsequently update its register. www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
13 - 20
AS1106, AS1107
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 AS1106/AS1107 should 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 pins V
DD
and GND to avoid power
supply ripple (see Figure 14 on page 16).
Note:
Both GND pins must be connected to ground.
9.2 Selecting R
SET
Resistor Value and Using External Drivers
Brightness of the display segments is controlled via R the LEDs.
SET
. The current that flows between V
DD
and I
SET
Segment current is about 200 times the current in I
SET
. Typical values for R
SET
for different segment currents, operating voltages, and LED voltage drop (V
LED
valid
needed, external drivers must be used, in which case it is no longer necessary that the devices drive high currents.
In cases where the devices only drive a few digits, Table 16 specifies the maximum currents, and R
SET
must be set accordingly.
Note:
Table 19. R
SET
vs. Segment Current and LED Forward Voltage, V
DD
= 2.7V
I
SEG
(mA)
40
30
1.5
5k
Ω
6.9k
Ω
V
LED
(V)
2.0
4.4k
Ω
5.9k
Ω
AG still
20
10
Table 20. R
SET
I
SEG
(mA)
10.7k
Ω
22.2k
Ω
1.5
V
9.6k
Ω
20.7k
Ω
ams
= 3.3V
40 6.7k
Ω
9.1k
Ω
6.4k
Ω
8.8k
Ω
30
13.9k
Ω
13.3k
Ω
20
5.7k
Ω
8.1k
Ω
12.6k
Ω
28.8k
Ω
27.7k
Ω
26k
Ω
10
Table 21. R
SET
vs. Segment Current and LED Forward Voltage, V
DD
= 3.6V
V
LED
(V)
I
SEG
(mA)
40
30
20
10
1.5
7.5k
Ω
10.18k
Ω
15.6k
Ω
31.9k
Ω
2.0
7.2k
Ω
9.8k
Ω
15k
Ω
31k
Ω
2.5
6.6k
Ω
9.2k
Ω
14.3k
Ω
29.5k
Ω
Table 22. R
SET
vs. Segment Current and LED Forward Voltage, V
DD
= 4.0V
I
SEG
40
30
Technical
V
LED
(V)
2.5
7.9k
Ω
10.8k
Ω
20
10
17.7k
Ω
36.89k
Ω
17.3k
Ω
35.7k
Ω
16.6k
Ω
34.5k
Ω
3.0
7.6k
Ω
9.9k
Ω
15.6k
Ω
32.5k
Ω
3.0
5.5k
Ω
7.5k
Ω
13k
Ω
27.3k
Ω
3.5
5.2k
Ω
7.8k
Ω
13.6k
Ω
29.1k
Ω www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
14 - 20
AS1106, AS1107
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
Table 23. R
SET
vs. Segment Current and LED Forward Voltage, V
DD
= 5.0V
V
LED
(V)
I
SEG
(mA)
40
30
20
10
1.5
11.35k
Ω
15.4k
Ω
23.6k
Ω
48.9k
Ω
2.0
11.12k
Ω
15.1k
Ω
23.1k
Ω
47.8k
Ω
2.5
10.84k
Ω
14.7k
Ω
22.6k
Ω
46.9k
Ω
3.0
10.49k
Ω
14.4k
Ω
22k
Ω
45.4k
Ω
3.5
10.2k
Ω
13.6k
Ω
21.1k
Ω
43.8k
Ω
4.0
9.9k
Ω
13.1k
Ω
20.2k
Ω
42k
Ω
9.3 Calculating the Power Dissipation
The upper limit for power dissipation (PD) for the AS1106/AS1107 is determined from the following equation:
Where:
V
DD
is the supply voltage.
DUTY
is the duty cycle set by intensity register (page 12).
N
is the number of segments driven (worst case is 8)
V
LED
is the LED forward voltage
PD = (V
DD
x 1mA) + (V
DD
- V
LED
)(DUTY x I
SEG
x N)
I
SEG
= segment current set by RSET
Dissipation Example:
Thus, for a PDIP package
Θ
I
SEG
= 40mA, N = 8, DUTY = 31/32, V
LED
AG
DD
= 5.25V
PD = 5.25V(1mA) + (5.25V - 1.8V)(31/32 x 40mA x 8) = 1.075W
JA
= +75°C/W (from Table 24 ), the maximum allowed T
AMB
is given by:
T
J,MAX
= T
AMB
+ PD x
Θ
JA
= 150°C = T
AMB
+1.07W x 75°C/W
Where:
T
AMB
= +69.4°C.
The T
AMB
Table 24. Package Thermal Data
ams
Package
24 Wide SOIC
Thermal Resistance (
+85°C/W
content still
(EQ 1)
valid
(EQ 2)
(EQ 3)
(EQ 4)
Technical
www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
15 - 20
AS1106, AS1107
Datasheet - A p p l i c a t i o n I n f o r m a t i o n
9.4 8x8 LED Dot Matrix Driver
The application example in
shows the AS1106 as an 8x8 LED dot matrix driver.
The LED columns have common cathodes and are connected to the DIG0:7 outputs. The rows are connected to the segment drivers. Each of
Note:
For a multiple-digit dot matrix, multiple AS1106 devices must be cascaded.
Figure 14. Application Example as LED Dot Matrix Driver
Diode Arrangement
Micro-
Processor
SEG A:G
SEG DP
AS1106/
AS1107
DIG0:7
DOUT
DIN
LOAD/CSN
CLK
GND
SEG G
SEG F
SEG E
SEG D
SEG C
SEG B
SEG A
SEG DP
GND
8x8 LED Dot Matrix
V
BAT
SEG G
SEG F
SEG E
SEG D
SEG C
AG
SEG A:G
SEG DP
SEG DP
SEG B
SEG A
DIG0:7
8x8 LED Dot Matrix still valid
AS1106/
AS1107
V
DD
V
BAT
DIN
9.53k
Ω
LOAD/CSN
CLK
I
SET
GND
9.5 Cascading Drivers
The example in
drives 2 dot matrix digits using a 4-wire microprocessor interface. All Scan-Limit Registers should be set to the same value so that one display will not appear brighter than the other.
For example, to display 12 digits, set both Scan-Limit Registers to display 6 digits so that both displays have a 1/6 duty cycle per digit. If 11 digits be 1/6.
Technical
Note:
Refer to
No-Op Register (0xX0) on page 13 for additional information.
16 - 20 www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
AS1106, AS1107
Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
10 Package Drawings and Markings
Figure 15. AS1106, AS1107 Marking
Table 25. Packaging Code
YY
last two digits of the current year
WW
manufacturing week
Q
plant identifier
AG
ZZ
free choice / traceability code
valid still
Technical
www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
17 - 20
AS1106, AS1107
Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s
Figure 16. SOIC 24-pin Package
AG still valid
Technical
www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
18 - 20
AS1106, AS1107
Datasheet - O r d e r i n g I n f o r m a t i o n
11 Ordering Information
The AS1106 and AS1107 are available as the standard products shown in Table 26 .
Table 26. Ordering Information
Ordering Code
AS1106WL
AS1106WL-T
Marking
AS1106WL
AS1106WL
Description
8-Digit LED Display Drivers
8-Digit LED Display Drivers
Temperature Range
0 to +70°C
0 to +70°C
Delivery Form
Tubes
Tape and Reel
Package
SOIC 24-pin
SOIC 24-pin
AS1106WE AS1106WE 8-Digit LED Display Drivers -40 to +85°C Tubes SOIC 24-pin
AS1106WE-T AS1106WE 8-Digit LED Display Drivers -40 to +85°C Tape and Reel SOIC 24-pin
AS1107WL
AS1107WL-T
AS1107WL
AS1107WL
8-Digit LED Display Drivers
8-Digit LED Display Drivers
Note:
All products are RoHS compliant and austriamicrosystems green.
-40 to +85°C
-40 to +85°C
Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect
Technical Support is found at http://www.austriamicrosystems.com/Technical-Support
For further information and requests, please contact us mailto:[email protected]
or find your local distributor at http://www.austriamicrosystems.com/distributor
AG
Tubes
Tape and Reel
still
SOIC 24-pin
SOIC 24-pin
valid
Technical
www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
19 - 20
AS1106, AS1107
Datasheet
Copyrights
Copyright © 1997-2012, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®.
All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
All products and companies mentioned are trademarks or registered trademarks of their respective companies.
Disclaimer
Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100
valid
parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location.
The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.
AG still
Contact Information
Headquarters
austriamicrosystems AG
Tobelbaderstrasse 30
A-8141 Unterpremstaetten, Austria
Tel: +43 (0) 3136 500 0
Fax: +43 (0) 3136 525 01 http://www.austriamicrosystems.com/contact www.austriamicrosystems.com/LED-Driver-ICs/AS1106_07 Revision 2.29
20 - 20
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