ams-OSRAM USA INC. 的 AS1116 规格书

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www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 1 - 23
AS1116
64 LED Driver with Detailed E r r o r Detection
1 General Description
The AS1116 is a compact LED driver for 64 single LEDs or 8 digits of
7-segments. The devices can be programmed via an SPI compatible
3-wire interface.
Every segment can be individually addressed and updated sepa-
rately. Only one external resistor (R
SET
) is required to set the cur-
rent. LED brightness can be controlled by analog or digital means.
The devices include an integrated BCD code-B/HEX decoder, multi-
plex scan circuitry, segment and display drivers, and a 64-bit mem-
ory. Internal memory stores the shift register settings, eliminating the
need for continuous device reprogramming.
Additionally the AS1116 offers a diagnostic mode for easy and fast
production testing and allows the use of the AS1116 for critical appli-
cations. 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 exter-
nal clock is also supported.
The device is available in a QSOP-24 and TQFN(4x4)-24 package.
Figure 1. AS1116 - Typical Application Diagram
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 displays in pub-
lic information displays at subway, train or bus stations, at airports
and also at displays in public transportation like buses or trains
mobile phones, personal electronic and toys.
AS1116
DIG0 to
DIG7
SEGA to G,
SEG DP
I/O
I/O
I/O
V
DD
ISET
SDI
LD
GND
SCL
2.7V to 5.5V
9.53kΩ
µP
8
SDO AS1116
SDI
LD
SCL
SDO AS1116
SDI
LD
SCL
SDO
I/O
8888
Diagnostic readback: open & shorted LEDs
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www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 2 - 23
AS1116
Datasheet - P i n o u t
4 Pinout
Pin Assignments
Figure 2. Pin Assignments (Top View)
Pin Descriptions
Table 1. Pin Descriptions
Pin Name QSOP-24 TQFN(4x4)-24 Description
SDI 1 22 Serial-Data Input. Data is loaded into the internal 16-bit shift register on the rising edge
of pin SCL.
DIG0:DIG7 2-5, 7-10 1, 2, 4, 5, 7, 8, 23,
24 Digit Drive Lines. Eight digit drive lines that sink current from the display cathode.
GND 6 3 Ground.
LD 11 9 Load. 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.
N/C 12 6 Not Connected.
I
SET
13 10
Set Segment Current. Connect to V
DD
or a reference voltage through R
SET
to set the
peak segment current (see Selecting RSET Resistor Value and Using
External Drivers on page 17).
SCL 14 11
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 SDO on the rising edge of this
pin.
SEGA:SEGG,
SEGDP
15-18,
20-23
12-15,
17-20
Seven Segment and Decimal Point Drive Lines. 8 seven-segment drives and
decimal point drive that source current to the display.
VDD 19 16 Positive Supply Voltage. Connect to +2.7 to +5.5V supply.
SDO 24 21 Serial-Data Output. The data into pin SDI is valid at pin SDO 16 clock cycles later. This
pin is used to daisy-chain several devices and is never high-impedance.
-Exposed Pad Exposed Pad. This pin also functions as a heat sink. Solder it to a large pad or to the
circuit-board ground plane to maximize power dissipation.
24
23
22
21
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
9
10
11
12
SDO
SEGD
SEGDP
SEG E
SEGC
VDD
SEGG
SEGB
SEGF
SEGA
SCL
I
SET
SDI
DIG0
DIG1
DIG2
DIG3
GND
DIG4
DIG5
DIG6
DIG7
LD
N/C
AS1116
SEG E
DIG7
8
18
SEGB
14
DIG2
1
GND
3
AS1116
DIG5
5
I
SET
10
SEGA
12
V
DD
16
SEGC
17
SEGG
15
SEGF
13
DIG3
2
DIG4
4
N/C
6
SCL
11
LD
9
DIG6
7
DIG0
23
SDO
21
SEGDP
19
SEGD
20
SDI
22
DIG1
24
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AS1116
Datasheet - A b s o l u t e M a x i m um R a t i n g s
5 Absolute Maximum Ratings
Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of
the device at these or any other conditions beyond those indicated in Section 6 Electrical Characteristics on page 4 is not implied.
Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Table 2. Absolute Maximum Ratings
Parameter Min Max Units Notes
Electrical Parameters
Input Voltage Range
V
DD
to GND -0.3 7 V
All other pins to GND -0.3 7 or
V
DD
+ 0.3 V
Current DIG0:DIG7 Sink Current 500 mA
SEGA:SEGG, SEGDP 100 mA
Input Current (latch-up immunity) ±100 mA Norm: JEDEC 78
Electrostatic Discharge
Electrostatic Discharge Digital outputs 1000 V Norm: MIL 833 E method 3015
All other pins 1000 V
Thermal Information
Thermal Resistance Θ
JA
88 ºC/W on PCB, QSOP-24 package
30.5 ºC/W on PCB, TQFN(4x4)-24 package
Temperature Ranges and Storage Conditions
Junction Temperature +150 °C
Storage Temperature -55 +150 ºC
Package Body Temperature +260 ºC
The reflow peak soldering temperature (body
temperature) specified is in accordance with
IPC/JEDEC J-STD-020 “Moisture/Reflow
Sensitivity Classification for Non-Hermetic
Solid State Surface Mount Devices”.
The lead finish for Pb-free leaded packages
is matte tin (100% Sn).
Humidity non-condensing 5 85 %
Moisture Sensitive Level QSOP-24 package 1 % Represents a max. floor life time of unlimited
TQFN(4x4)-24 package 3 % Represents a max. floor life time 168h
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 4 - 23
AS1116
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
= 2.7 to 5.5V, R
SET
= 9.53kΩ, Typical values are at T
AMB
= +25°C, V
DD
= 5.0V (unless otherwise specified). All limits are guaranteed. The
parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods.
Table 3. Electrical Characteristics
Symbol Parameter Conditions Min Typ Max Unit
T
AMB
Operating Temperature Range -40 +85 °C
T
J
Operating Junction Temperature -40 +125 °C
V
DD
Operating Supply Voltage 2.7 5.5 V
I
DDSD
Shutdown Supply Current All digital inputs at V
DD
or GND,
T
AMB
= +25ºC 0.2 2 µA
I
DD
Operating Supply Current
R
SET
= open circuit. 0.35 0.6
mA
All segments and decimal point on;
I
SEG
= -40mA. 335
f
OSC
Display Scan Rate 8 digits scanned 0.6 0.8 1.2 kHz
I
DIGIT
Digit Drive Sink Current V
OUT
= 0.65V 320 mA
I
SEG
Segment Drive Source Current V
DD
= 5.0V, V
OUT
= (V
DD
-1V) -37 -42 -47 mA
∆I
SEG
Segment Drive Current Matching 3 %
I
SEG
Segment Drive Source Current Average Current 47 mA
Table 4. Logic Inputs/Outputs Characteristics
Symbol Parameter Conditions Min Typ Max Unit
I
IH
, I
IL
Input Current SDI, SCL, LD V
IN
= 0V or V
DD
-1 1 µA
V
IH
Logic High Input Voltage 4.5V < V
DD
< 5.5V 0.6 x V
DD
V
2.7V < V
DD
< 4.5V 0.7 x V
DD
V
V
IL
Logic Low Input Voltage V
DD
= 5.0V 0.8 V
V
DD
= 3.0V 0.6
V
OH
Output High Voltage
SDO, I
SOURCE
= -1mA,
V
DD
= 5.0V V
DD
- 1
V
SDO, I
SOURCE
= -1mA,
V
DD
= 3.0V V
DD
- 0.5
V
OL
Output Low Voltage SDO, I
SINK
= 1mA 0.4 V
∆V
I
Hysteresis Voltage SDI, SCL, LD 1 V
Open Detection Level Threshold 0.7x
V
DD
0.75x
V
DD
0.8x
V
DD
V
Short Detection Level Threshold 0.05x V
DD
0.1x
V
DD
0.15x
V
DD
V
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 5 - 23
AS1116
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
See Figure 19 on page 10 for more information.
Table 5. SPI Timing Characteristics
Symbol Parameter Conditions Min Typ Max Unit
t
CP
SCL Clock Period 100 ns
t
CH
SCL Pulse Width High 20 ns
t
CL
SCL Pulse Width Low 20 ns
t
CSS
LD to SCL Rise Setup Time 25 ns
t
CSH
SCL Rise to LD Rise Hold Time 10 ns
t
DS
SDI Setup Time 0 ns
t
DH
SDI Hold Time 5 ns
t
DO
Output Data Propagation Delay C
LOAD
= 50pF 25 ns
t
LDCK
LD Rising Edge to SCL Rising Edge 20 ns
t
CSW
Minimum LD Pulse High 20 ns
t
DSPD
Data-to-Segment Delay 2.25 ms
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 6 - 23
AS1116
Datasheet - Typ 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
R
SET
= 9.53kΩ, V
Rset
= V
DD
;
Figure 3. Display Scan Rate vs. Supply Voltage; Figure 4. Display Scan Rate vs. Temperature;
840
860
880
900
920
940
960
980
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Vdd (V)
fosc (Hz) .
Tamb = - 40°C
Tamb = + 25°C
Tamb = + 85°C
840
860
880
900
920
940
960
980
-40 -15 10 35 60 85
Tamb (°C)
fosc (Hz) .
Vdd = 2.7V
Vdd = 4V
Vdd = 5V
Vdd = 5.5V
Figure 5. Segment Current vs. Temperature; Figure 6. Segment Current vs. R
SET
;
0
10
20
30
40
50
60
-40 -15 10 35 60 85
Tamb (°C)
Iseg (mA) .
Vseg = 1.7V; Vdd = 2.7V
Vseg = 1.7V; Vdd = 5V
Vseg = 3V; Vdd = 5V
Vseg = 4V; Vdd = 5V
0
10
20
30
40
50
0 10 20 30 40 50 60 70 80 90
Rset (kOhm)
Iseg (mA) .
Vseg = 4V; Vdd = 5V
Vseg = 3V; Vdd = 5V
Vseg = 2V; Vdd = 5V
Vseg = 1.7V; Vdd = 2.7V
Figure 7. Segment Current vs. Supply Voltage; Figure 8. Segment Current vs. V
DD
; V
Rset
= 2.8V
0
10
20
30
40
50
60
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Vdd (V)
Iseg (mA) .
Vseg = 1.7V
Vseg = 3V
Vseg = 4V
0
5
10
15
20
25
30
35
40
45
50
2.7 3 3.3 3.6 3.9 4.2
Vdd (V)
Iseg (mA) .
Vseg = 1.7V
Vseg = 2V
Vseg = 2.3V
Vseg = 3.1V
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 7 - 23
AS1116
Datasheet - Typ 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 9. V
DIGIT
vs. I
DIGIT
Figure 10. Input High Level vs. Supply Voltage
0
0.1
0.2
0.3
0.4
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35
Idig (A)
Vdig (V) .
Vdd = 3.3V
Vdd = 4V
Vdd = 5V
Vdd = 5.5V
0
0.5
1
1.5
2
2.5
3
3.5
2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5
Vdd (V)
Vih (V) .
Figure 11. I
SEG
vs. V
SEG
; V
DD
= 5V Figure 12. I
SEG
vs. V
SEG
; V
DD
= 4V
0
5
10
15
20
25
30
35
40
45
50
2 2.5 3 3.5 4 4.5 5
Vseg (V)
Iseg (mA) .
Rext = 10k
Rext = 13k
Rext = 18k
Rext = 30k
Rext = 56k
0
5
10
15
20
25
30
35
40
45
50
1 1.5 2 2.5 3 3.5 4
Vseg (V)
Iseg (mA) .
Rext = 8k2
Rext = 10k
Rext = 13k
Rext = 18k
Rext = 30k
Figure 13. I
SEG
vs. V
SEG
; V
DD
= 3.3V Figure 14. I
SEG
vs. V
SEG
; V
DD
= 2.7V
0
5
10
15
20
25
30
35
40
45
50
1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2
Vseg (V)
Iseg (mA) .
Rext = 6k8
Rext = 8k2
Rext = 10k
Rext = 13k
Rext = 18k
0
5
10
15
20
25
30
35
40
45
50
1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6
Vseg (V)
Iseg (mA) .
Rext = 4k7
Rext = 5k6
Rext = 6k8
Rext = 10k
Rext = 13k
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 8 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
8 Detailed Description
Block Diagram
Figure 15. Block Diagram (QSOP-24 Package)
Figure 16. ESD Structure
AS1116
Registers
Digital Control
Logic
Oszillator
Open/Short
Detection
SPI
Interface
+
–
+
–
19
VDD
Scan - Registers
Control - Registers
Data - Registers
(PWM, Debounce,....)
R
SET
13
ISET
15-18, 20-23
SEGA-G,
SEGDP
2-5, 7-10
DIG0 to DIG7
6
GND
VDD
8
8
14
SCL
1
SDI
24
SDO
11
LD
VDD valid for the pins:
- SDI
- SCL
- SDO
- LD
- ISET
- SEGA-G, SEGDP
VDD
valid for the pins:
- DIG0 to DIG7
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 9 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
Serial Interface
The AS1116 contains a 16bit SPI interface to access the internal data and control registers of the device (see Digit- and Control-Registers
on page 11). The SPI interface is driven with the rising edge of SCL. A falling edge on LD signal indicates the beginning of an access on the
SPI interface, the rising edge on LD determines an access on SPI. An access must consist of exactly 16bits for write operation and 8bits for read
operation. Timing restrictions on the SPI interface pins are defined in Figure 19.
Table 6 shows the structure of the 16bit command word for writing data. The bits D0 to D7 are the data information, bits D8 to D12 are the
address bits, D13 is set to ‘0’, bit D14 is defining the read (D14 = ‘1’) or the write (D14 = ‘0’) configuration and bit D15 is a don’t care bit.
In Table 7 on page 11 the 8bit command word for the read operation can be found.
Bit D0 (write operation) or bit D8 (read operation) is the first bit to shift into the SPI interface after the falling edge of LD. Bit D15 is the last bit to
write to SPI before rising edge of LD.
At a read operation an 8bit operation is executed (see Figure 18). At the first rising edge of SCL after the rising edge of LD D7 of addressed
register is written to SDO pin. At the next rising edge of SCL D6 is written to SDO pin. LD must be kept high during reading data from a internal
data or control register of AS1116.
Figure 17. Write operation
Figure 18. Read operation
Table 6. 16-Bit Serial Data Format
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15
LSB Data MSB Register Address (see Table 7) 0 R/W X
1 98 16
D3 D4 D5 D6 D7
D1 D2
D0
SCL
LD
SDI
D11 D12 D13 D14 D15
D9 D10
D8
SDO
D3 D4 D5 D6 D7
D1 D2
D0 D11 D12 D13 D14 D15
D9 D10
D8
1 98 16
D11 D12 D13 D14 D15
D9 D10
D8
SCL
LD
SDI
D4 D3 D2 D1 D0
D6 D5
D7
SDO
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 10 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
Figure 19. Interface Timing
Initial Power-Up
On initial power-up, the AS1116 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.
Note: The default settings enable only scanning of one digit; the internal decoder is disabled and the Intensity Control Register (see page
15) is set to the minimum values.
Shutdown Mode
The AS1116 devices feature a shutdown mode, where they consume only 200nA (typ) current. Shutdown mode is entered via a write to the Shut-
down Register (see Table 8). For the AS1116, at that point, all segment current sources and digital drivers are switched off, so that all segments
are blanked.
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 leav-
ing shutdown mode). For minimum supply current in shutdown mode, logic input should be at GND or V
DD
(CMOS logic level).
When entering or leaving shutdown mode, the Feature Register is reset to its default values (all 0s) when Shutdown Register bit D7 (page 12) =
0.
Note:
When
Shutdown Register bit D7 = 1, the Feature Register is left unchanged when entering or leaving shutdown mode. If the AS1116
is used with an external clock, Shutdown Register bit D7 should be set to 1 when writing to the Shutdown Register.
t
CL
LD
SCL
SDI
SDO
D0 D1 D14 D15
t
DO
t
CSS
t
DS
t
DH
t
CH
t
CP
t
CSH
t
CSW
t
LDCK
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 11 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
Digit- and Control-Registers
The AS1116 devices contain 8 Digit-Registers,11 control-registers and 8 diagnostic-registers, which are listed in Table 7. All registers are
selected using a 8-bit 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.
Control Registers – These registers consist of decode mode, display intensity, number of scanned digits, shutdown, display test and fea-
tures selection registers.
Note: Write operation: D14=0; Read operation: D14=1.
Table 7. Register Address Map
Type
Register Address Page
D15 D14 D13 D12 D11 D10 D9 D8 D7:D0
No-Op X 0 0 0 0 0 0 0 16
Digit Register
Digit 0 X 0 0 0 0 0 0 1
(see Table 10 on page 12,
Table 11 on page 13 and
Table 12 on page 13)
N/A
Digit 1 X 0 0 0 0 0 1 0 N/A
Digit 2 X 0 0 0 0 0 1 1 N/A
Digit 3 X 0 0 0 0 1 0 0 N/A
Digit 4 X 0 0 0 0 1 0 1 N/A
Digit 5 X 0 0 0 0 1 1 0 N/A
Digit 6 X 0 0 0 0 1 1 1 N/A
Digit 7 X 0 0 0 1 0 0 0 N/A
Control Register
Decode-Mode X 0 0 0 1 0 0 1 (see Table 9 on page 12)12
Global Intensity X 0 0 0 1 0 1 0 (see Table 16 on page 15)15
Scan Limit X 0 0 0 1 0 1 1 (see Table 18 on page 15)15
Shutdown X 0 0 0 1 1 0 0 (see Table 8 on page 12)12
Not Used X 0 0 0 1 1 0 1 N/A
Feature X 0/1 0 0 1 1 1 0 (see Table 19 on page 16)16
Display Test Mode X 0 0 0 1 1 1 1 (see Table 13 on page 14)12
DIG0:DIG1 Intensity X 0 0 1 0 0 0 0 (see Table 17 on page 15)
DIG2:DIG3 Intensity X 0 0 1 0 0 0 1 (see Table 17 on page 15)
DIG4:DIG5 Intensity X 0 0 1 0 0 1 0 (see Table 17 on page 15)
DIG6:DIG7 Intensity X 0 0 1 0 0 1 1 (see Table 17 on page 15)
Diagnostic Register
Diagnostic Digit 0 X 1 0 1 0 1 0 0 N/A
Diagnostic Digit 1 X 1 0 1 0 1 0 1 N/A
Diagnostic Digit 2 X 1 0 1 0 1 1 0 N/A
Diagnostic Digit 3 X 1 0 1 0 1 1 1 N/A
Diagnostic Digit 4 X 1 0 1 1 0 0 0 N/A
Diagnostic Digit 5 X 1 0 1 1 0 0 1 N/A
Diagnostic Digit 6 X 1 0 1 1 0 1 0 N/A
Diagnostic Digit 7 X 1 0 1 1 0 1 1 N/A
H
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 12 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
The Shutdown Register controls AS1116 shutdown mode.
Decode Enable Register (0x09)
The Decode Enable Register sets the decode mode. BCD/HEX decoding (either BCD code – characters 0:9, E, H, L, P, and -, or HEX code –
characters 0:9 and A:F) is selected by bit D2 (page 16) of the Feature Register. The Decode Enable Register is used to select the decode mode
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,
bit D1 corresponds to digit 1 and so on). Table 10 lists some examples of the possible settings for the Decode Enable Register bits.
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.
Bit D7 sets the decimal point (SEG DP) independent of the decoder and is positive logic (bit D7 = 1 turns the decimal point on). Table 10 lists
the code-B font; Table 11 lists the HEX font.
When no-decode mode is selected, data bits D7:D0 of the Digit-Registers correspond to the segment lines of the AS1116. Table 12 shows the
1:1 pairing of each data bit to the appropriate segment line.
Table 8. Shutdown Register Format (Address (HEX) = 0x0C))
Mode HEX
Code
Register Data
D7 D6 D5 D4 D3 D2 D1 D0
Shutdown Mode, Reset Feature Register to Default Settings 0x00 0 X X X X X X 0
Shutdown Mode, Feature Register Unchanged 0x80 1 X X X X X X 0
Normal Operation, Reset Feature Register to Default Settings 0x01 0 X X X X X X 1
Normal Operation, Feature Register Unchanged 0x81 1 X X X X X X 1
Table 9. Decode Enable Register Format Examples
Decode Mode HEX
Code
Register Data
D7 D6 D5 D4 D3 D2 D1 D0
No decode for digits 7:0 0x00 0 0 0 0 0 0 0 0
Code-B/HEX decode for digit 0. No decode for digits 7:1 0x01 0 0 0 0 0 0 0 1
Code-B/HEX decode for digit 0:2. No decode for digits 7:3 0x07 0 0 0 0 0 1 1 1
Code-B/HEX decode for digits 0:5. No decode for digits 7:6 0x3F 0 0 1 1 1 1 1 1
Code-B/HEX decode for digits 0,2,5. No decode for digits 1, 3, 4, 6, 7 0x25 0 0 1 0 0 1 0 1
Table 10. Code-B Font
Char-
acter
Register Data Char-
acter
Register Data Char-
acter
Register Data
D7 D6:D4 D3
D2
D1
D0
D7 D6: D4 D3
D2
D1
D0
D7 D6:D4 D3
D2
D1
D0
X 0 0 0 0 X 0 1 1 0 X 1 1 0 0
X 0 0 0 1 X 0 1 1 1 X 1 1 0 1
X 0 0 1 0 X 1 0 0 0 X 1 1 1 0
X 0 0 1 1 X 1 0 0 1 X 1 1 1 1
X 0 1 0 0 X 1 0 1 0 1
*
X X X X X
X 0 1 0 1 X 1 0 1 1
*
The decimal point can be enabled with every character by setting bit D7 = 1.
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 13 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
Figure 20. Standard 7-Segment LED
Table 11. HEX Font
Char-
acter
Register Data Char-
acter
Register Data Char-
acter
Register Data
D7 D6:D4
D3
D2
D1
D0
D7 D6: D4
D3
D2
D1
D0
D7 D6:D4
D3
D2
D1
D0
X 0 0 0 0 X 0 1 1 0 X 1 1 0 0
X 0 0 0 1 X 0 1 1 1 X 1 1 0 1
X 0 0 1 0 X 1 0 0 0 X 1 1 1 0
X 0 0 1 1 X 1 0 0 1 X 1 1 1 1
X 0 1 0 0 X 1 0 1 0 1
*
X X X X X
X 0 1 0 1 X 1 0 1 1
*
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
AB
G
F
EDC
DP
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 14 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
Display-Test Mode
The AS1116 can detect open or shorted LEDs. Readout of either open LEDs (D2=1) or short LEDs (D1=1) is possible, as well as a OR relation of
open and short (D1=D2=1). After a diagnostic run bit D4 can be read to clarify if an error occurred before reading out detailed diagnostic data.
Note: All settings of the digit- and control-registers are maintained.
LED Diagnostic Registers
These eight registers contain the result of the LED open/short test for the individual LED of each digit.
Note: If more than 2 shorts occure in the LED array, detection of individual LED fault could become limited to blocs.
Table 13. Testmode Register Summary
D7 D6 D5 D4 D3 D2 D1 D0
X REXT_short REXT_open LED_global LED_test LED_open LED_short DISP_test
Table 14. Testmode Register Bit Description (Address (HEX) = 0x0F))
Addr: 0x0F Address
Bit Bit Name Default Access D7:D0
D0 DISP_test 0 W
Optical display test. (Testmode for external visual test.)
0: Normal operation; 1: Run display test (All digits are tested independently
from scan limit & shutdown register.)
D1 LED_short 0 W Starts a test for shorted LEDs. (Can be set together with D2)
0: Normal operation; 1: Activate testmode
D2 LED_open 0 W Starts a test for open LEDs. (Can be set together with D1)
0: Normal operation; 1: Activate testmode
D3 LED_test 0 R Indicates an ongoing open/short LED test
0: No ongoing LED test; 1: LED test in progress
D4 LED_global 0 R Indicates that the last open/short LED test has detected an error
0: No error detected; 1: Error detected
D5 REXT_open 0 R Checks if external resistor R
EXT
is open
0: R
EXT
correct; 1: R
EXT
is open
D6 REXT_short 0 R Checks if external resistor R
EXT
is shorted
0: R
EXT
correct; 1: R
EXT
is shorted
D7 0 - Not used
Table 15. LED Diagnostic Register Address
Register
HEX
Address
Segment Register
HEX
Address
Segment
Digit D7 D6 D5 D4 D3 D2 D1 D0 Digit D7 D6 D5 D4 D3 D2 D1 D0
0x14 DIG0
DP A B C D E F G
0x18 DIG4
DP A B C D E F G
0x15 DIG1 0x19 DIG5
0x16 DIG2 0x1A DIG6
0x17 DIG3 0x1B DIG7
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 15 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
Intensity Control Register (0x0A)
The brightness of the display can be controlled by digital means using the Intensity Control Registers and by analog means using R
SET
(see
Selecting RSET Resistor Value and Using External Drivers on page 17). The intensity can be controlled globally for all digits, or
for each digit individually. The global intensity command will write intensity data to all four individual brightness registers, while the individual
intesity command will only write to the associated individual intensity register.
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 15/16 down to 1/16 of the peak current set by R
SET
.
Scan-Limit Register (0x0B)
The Scan-Limit Register controls which of the digits are to be displayed. When all 8 digits are to be displayed, the update frequency is typically
0.8kHz. 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.
Note: To avoid differences in brightness this register should not be used to blank parts of the display (leading zeros).
Table 16. Intensity Register Format
Duty Cycle HEX Code Register Data Duty Cycle HEX Code Register Data
MSB D2 D1 LSB MSB D2 D1 LSB
1/16 (min on) 0xX0 0 0 0 0 9/16 0xX8 1 0 0 0
2/16 0xX1 0 0 0 1 10/16 0xX9 1 0 0 1
3/16 0xX2 0 0 1 0 11/16 0xXA 1 0 1 0
4/16 0xX3 0 0 1 1 12/16 0xXB 1 0 1 1
5/16 0xX4 0 1 0 0 13/16 0xXC 1 1 0 0
6/16 0xX5 0 1 0 1 14/16 0xXD 1 1 0 1
7/16 0xX6 0 1 1 0 15/16 0xXE 1 1 1 0
8/16 0xX7 0 1 1 1 15/16 (max on) 0xXF 1 1 1 1
Table 17. Intensity Register Address
Register HEX Address Register Data
Type D7:D4 D3:D0
0x0A Global X Global Intensity
0x10 Digit Digit 1 Intensity Digit 0 Intensity
0x11 Digit Digit 3 Intensity Digit 2 Intensity
0x12 Digit Digit 5 Intensity Digit 4 Intensity
0x13 Digit Digit 7 Intensity Digit 6 Intensity
Table 18. Scan-Limit Register Format (Address (HEX) = 0x0B))
Scan Limit HEX
Code
Register Data Scan Limit HEX
Code
Register Data
D7:D3 D2 D1 D0 D7:D3 D2 D1 D0
Display digit 0 only 0xX0 X 0 0 0 Display digits 0:4 0xX4 X 1 0 0
Display digits 0:1 0xX1 X 0 0 1 Display digits 0:5 0xX5 X 1 0 1
Display digits 0:2 0xX2 X 0 1 0 Display digits 0:6 0xX6 X 1 1 0
Display digits 0:3 0xX3 X 0 1 1 Display digits 0:7 0xX7 X 1 1 1
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 16 - 23
AS1116
Datasheet - D e t a i l e d D e s c r i p t i o n
Feature Register
(0x0E)
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, setting the blinking rate,
and resetting the blink timing.
Note: At power-up the Feature Register is initialized to 0.
No-Op Register (0xX0)
The No-Op Register is used when multiple AS1116 devices are cascaded in order to support displays with more than 8 digits. The cascading
must be done in such a way that all SDO pins are connected to SDI of the next AS1116 (see Figure 21 on page 18). The LD and SCL sig-
nals are connected to all devices.
For example, if five devices are cascaded, in order to perform a write operation to the fifth device, the write-command must be followed by four
no-operation commands. When the LD 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.
Table 19. Feature Register Summary
D7 D6 D5 D4 D3 D2 D1 D0
blink_start sync blink_freq_sel blink_en NU decode_sel reg_res clk_en
Table 20. Feature Register Bit Descriptions (Address (HEX) = 0xXE)
Addr: 0xXE Feature Register
Enables and disables various device features.
Bit Bit Name Default Access Bit Description
D0 clk_en 0 R/W
External clock active.
0 = Internal oscillator is used for system clock.
1 = Pin CLK of the serial interface operates as system clock input.
D1 reg_res 0 R/W
Resets all control registers except the Feature Register.
0 = Reset Disabled. Normal operation.
1 = All control registers are reset to default state (except the Feature Register)
identically after power-up.
Note: The Digit Registers maintain their data.
D2 decode_sel 0 R/W
Selects display decoding for the selected digits (Table 9 on page 12).
0 = Enable Code-B decoding (see Table 10 on page 12).
1 = Enable HEX decoding (see Table 11 on page 13).
D3 NU Not used
D4 blink_en 0 R/W Enables blinking.
0 = Disable blinking. 1 = Enable blinking.
D5 blink_freq_sel 0 R/W
Sets blink with low frequency (with the internal oscillator enabled):
0 = Blink period typically is 1 second (0.5s on, 0.5s off).
1 = Blink period is 2 seconds (1s on, 1s off).
D6 sync 0 R/W
Synchronizes blinking on the rising edge of pin LD. The multiplex and blink timing
counter is cleared on the rising edge of pin LD. By setting this bit in multiple devices, the
blink timing can be synchronized across all the devices.
D7 blink_start 0 R/W
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.
.Skfl .2kfl .ZKQ .Bkfl {2 {2 0 WBKQ 5.6kfl 1.9kfl Q {2 2kfl .7kfl flkfl Q Q Q 0.8kfl 6.6kfl 4.5kfl .SKQ Q 7.3kfl 5.7kfl kfl £2 £2
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 17 - 23
AS1116
Datasheet - Typ i c a l A p p li c a t io n
9 Typical Application
Selecting R
SET
Resistor Value and Using External Drivers
Brightness of the display segments is controlled via R
SET
. The current that flows between V
DD
and I
SET
defines the current that flows through
the LEDs.
Segment current is about 200 times the current in I
SET
. Typical values for R
SET
for different segment currents, operating voltages, and LED volt-
age drop (V
LED
) are given in Table 21 & Table 22. The maximum current the AS1116 can drive is 47mA. If higher currents are needed, exter-
nal drivers must be used, in which case it is no longer necessary that the devices drive high currents.
Note: The display brightness can also be logically controlled (see Intensity Control Register (0x0A) on page 15).
Calculating Power Dissipation
The upper limit for power dissipation (PD) for the AS1116 is determined from the following equation:
PD = (V
DD
x 5mA) + (V
DD
- V
LED
)(DUTY x I
SEG
x N) (EQ 1)
Where:
V
DD
is the supply voltage.
DUTY is the duty cycle set by intensity register (page 15).
N is the number of segments driven (worst case is 8)
V
LED
is the LED forward voltage
I
SEG
= segment current set by RSET
Dissipation Example:
I
SEG
= 40mA, N = 8, DUTY = 15/16, V
LED
= 2.2V at 40mA, V
DD
= 5V (EQ 2)
PD = 5V(5mA) + (5V - 2.2V)(15/16 x 40mA x 8) = 0.865W (EQ 3)
Thus, for a QSOP-24 package
Θ
JA
= +88°C/W, the maximum allowed T
AMB
is given by:
T
J,MAX
= T
AMB
+ PD x
Θ
JA
= 150°C = T
AMB
+ 0.865W x 88°C/W (EQ 4)
In this example the maximum ambient temperature must stay below 73.88°C.
Table 21. R
SET
vs. Segment Current and LED Forward Voltage, V
DD
= 2.7V & 3.3V & 3.6V
I
SEG
(mA) V
LED
V
LED
V
LED
1.5V 2.0V 1.5V 2.0V 2.5V 1.5V 2.0V 2.5V 3.0V
40
V
DD
= 2.7V
5kΩ4.4kΩ
V
DD
= 3.3V
6.7kΩ6.4kΩ5.7kΩ
V
DD
= 3.6V
7.5kΩ7.2kΩ6.6kΩ5.5kΩ
30 6.9kΩ5.9kΩ9.1kΩ8.8kΩ8.1kΩ10.18kΩ9.8kΩ9.2kΩ7.5kΩ
20 10.7kΩ9.6kΩ13.9kΩ13.3kΩ12.6kΩ15.6kΩ15kΩ14.3kΩ13kΩ
10 22.2kΩ20.7kΩ28.8kΩ27.7kΩ26kΩ31.9kΩ31kΩ29.5kΩ27.3kΩ
Table 22. R
SET
vs. Segment Current and LED Forward Voltage, V
DD
= 4.0V & 5.0V
I
SEG
(mA)
V
LED
V
LED
1.5V 2.0V 2.5V 3.0V 3.5V 1.5V 2.0V 2.5V 3.0V 3.5V 4.0V
40
V
DD
= 4.0V
8.6kΩ8.3kΩ7.9kΩ7.6kΩ5.2kΩ
V
DD
= 5.0V
11.35kΩ11.12kΩ10.84kΩ10.49kΩ10.2kΩ9.9kΩ
30 11.6kΩ11.2kΩ10.8kΩ9.9kΩ7.8kΩ15.4kΩ15.1kΩ14.7kΩ14.4kΩ13.6kΩ13.1kΩ
20 17.7kΩ17.3kΩ16.6kΩ15.6kΩ13.6kΩ23.6kΩ23.1kΩ22.6kΩ22kΩ21.1kΩ20.2kΩ
10 36.89kΩ35.7kΩ34.5kΩ32.5kΩ29.1kΩ48.9kΩ47.8kΩ46.9kΩ45.4kΩ43.8kΩ42kΩ
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 18 - 23
AS1116
Datasheet - Typ i c a l A p p li c a t io n
8x8 Dot Matrix Mode
The application example in Figure 21 shows the AS1116 in the 8x8 LED dot matrix mode.
The LED columns have common cathodes and are connected to the 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 listed in Table 7 on page 11.
The Decode Enable Register (see page 12) must be set to ‘00000000’ as described in Table 9 on page 12. Single LEDs in a column can
be addressed as described in Table 12 on page 13, where bit D0 corresponds to segment G and bit D7 corresponds to segment DP.
Note: For a multiple-digit dot matrix, multiple AS1116 devices can be cascaded easily.
Figure 21. Application Example as LED Dot Matrix Driver
Supply Bypassing and Wiring
In order to achieve optimal performance the AS1116 should be placed very close to the LED display to minimize effects of electromagnetic inter-
ference 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 sup-
ply ripple (see Figure 21 on page 18).
AS1116
I/O
I/O
I/O
V
DD
I
SET
SDI
LD
GND
SCL
2.7 to 5V
9.53kΩ
µP
I/O Diagnostic
readback: open
& shorted LEDs
SDO
Diode Arrangement
DIG0 to
DIG7
SEG A to G
SEP DP
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 19 - 23
AS1116
Datasheet - P a c k a g e D ra wi n gs a n d M a r ki n gs
10 Package Drawings and Markings
Figure 22. QSOP-24 Marking
Figure 23. TQFN(4x4)-24 Marking
Table 23. Packaging Code
YY WW R / X ZZ AS1116 / ASR9 @
manufacturing year manufacturing week plant identifier free choice / traceability code marketing code sublot identifier
AS1116 @
YYWWRZZ
ASR9 @
YYWWXZZ
a mm c A7: EX D i’i’i i’i’i :EE vmw 5/ VIEW AiA jib 4‘ ‘(inps Tb“ I E -|a E E c I A .—‘ SECTIDN BiB I!!!“ 1—19 to: c NX SEAT‘NG PLANE ewe: PLANE mm mm: EM VIEW C NOTE: I. D‘MENSIONS At TOLERANCEWG CONHRM To ASME VMSMAQQA. Z, ALL DIMENS‘DNS ARE \N M‘LL‘METERS. ANGELS ARE \N DEGREES. A DATUMS A a: B To BE DETERM‘NED AT DATUM H 63 mm?
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 20 - 23
AS1116
Datasheet - P a c k a g e D ra wi n gs a n d M a r ki n gs
Figure 24. QSOP-24 Package
(DATUM A OR a) TERMTNAL TTP EVEN/ODD TERMINAL S‘DE DETAIL B sEATTNe PLANE A /P\N#HD '6 1 Cl E Cl Cl U s amfl SEEDETATLE (DAVUMW 9mm”? GBGreen NM 4. y A y N“ am,“ G3 RoHS DTMENsTDNTNG AND ToLERANcTNG CDNFDRM To AsME v14 swam NOTE 1 2 ALL DTMENsToNs ARE TN MTLLTMETERs ANGELS ARE IN DEGREES a DTMENsTDN nAPF-LTES To METALLTzED TERMWAL AND Ts MEASURED BETWEEN 0 25mm AND 0 30mm FROM TERMTNAL TTP. DTMENSTDN L1 REPRESENTS TERMTNAL FULL BACK FROM PACKAGE EDGE UP To 0.15m Ts ACCEPTABLE COPLANARTTV APPUES To THE EXPOSED HEAT sLuG As WELL As THE TERMTNAL RADIUS ON TERMTNAL Ts OPTIONAL N Ts THE TOTAL NUMBER OF TERMTNALS
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 21 - 23
AS1116
Datasheet - P a c k a g e D ra wi n gs a n d M a r ki n gs
Figure 25. TQFN(4x4)-24 Package
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 22 - 23
AS1116
Datasheet - O r d e r i ng I n fo r m a ti o n
11 Ordering Information
The devices are available as the standard products shown in Table 24.
Note: All products are RoHS compliant and ams green.
Buy our products or get free samples online at ICdirect: http://www.ams.com/ICdirect
Technical Support is found at http://www.ams.com/Technical-Support
For further information and requests, please contact us mailto:sales@ams.com
or find your local distributor at http://www.ams.com/distributor
Table 24. Ordering Information
Ordering Code Marking Description Delivery Form Package
AS1116-BSST AS1116 64 LED Driver with Detailed Error Detection Tape and Reel QSOP-24
AS1116-BQFT ASR9 64 LED Driver with Detailed Error Detection Tape and Reel TQFN(4x4)-24
www.ams.com/LED-Driver-IC2/AS1116 Revision 1.09 23 - 23
AS1116
Datasheet
Copyrights
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reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the
copyright owner.
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Disclaimer
Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. ams 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. ams AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior
to designing this product into a system, it is necessary to check with ams AG for 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 ams AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard
production flow, such as test flow or test location.
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