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AS1109 Datasheet(PDF) 6 Page - ams AG

Part # AS1109
Description  Constant-Current, 8-Bit LED Driver with Diagnostics
PDF  26 Pages
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Manufacturer  AMSCO [ams AG]
Direct Link  http://www.ams.com
Logo AMSCO - ams AG

AS1109 Datasheet(HTML) 6 Page - ams AG

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Revision 1.18
6 - 26
AS1109
Data Sheet - 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
Switching Characteristics
VDD = 3.0 to 5.5V, VDS = 0.8V, VIH = VDD, VIL = GND, REXT = 372
Ω, VLOAD = 4.0V, RLOAD = 64Ω, CLOAD = 10pF; guar-
anteed by design.
*
If multiple AS1109 devices are cascaded and tr or tf is large, it may be critical to achieve the timing required for data
transfer between two cascaded LED drivers.
IDD(OFF)0
Supply
Current
Off
REXT = Open‚ OUTN0:7 = Off
1.3
2
mA
IDD(OFF)1
REXT = 744
Ω‚ OUTN0:7 = Off
3.0
3.68
IDD(OFF)2
REXT = 372
Ω‚ OUTN0:7 = Off
4.7
5.37
IDD(OFF)3
REXT = 186
Ω, OUTN0:7 = Off
8.1
8.73
IDD(ON)1
On
REXT = 744
Ω‚ OUTN0:7 = On
4.5
5
IDD(ON)2
REXT = 372
Ω‚ OUTN0:7 = On
7.5
8
IDD(ON)3
REXT = 186
Ω‚ OUTN0:7 = On
13.7
15
Table 4. Switching Characteristics
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
tP1
Propagation Delay Time
CLK - SDO
5
10
ns
tP2
Propagation Delay Time (Without
Staggered Output Delay)
LD - OUTNn
100
200
tP3
OEN - OUTNn
100
200
tP4
Propagation Delay Time
10
ns
tW(CLK)
Pulse Width
CLK
15
ns
tW(L)
LD
15
tW(OE)
OEN (@IOUT < 60mA)
200
tR
*
Maximum CLK Rise Time
500
ns
tF
*
Maximum CLK Fall Time
500
ns
tOR
Output Rise Time of VOUT (Turn Off)
100
200
ns
tOF
Output Fall Time of VOUT (Turn On)
100
300
ns
tSU(D)
Setup Time for SDI
5
ns
tH(D)
Hold Time for SDI
5
ns
tSU(L)
Setup Time for LD
5
ns
tH(L)
Hold Time for LD
5
ns
tTESTING
Minimum OEN Time for Error Detection
2000
ns
tSTAG
Staggered Output Delay
20
40
ns
tSU(OE)
Output Enable Setup Time
20
ns
tGSW(ERROR)
Global Error Switching Setup Time
10
ns
tSU(ERROR)
Global Error Detection Setup Time
10
ns
tP(I/O)
Propagation Delay Global Error Flag
5
ns
tSW(ERROR)
Switching Time Global Error Flag
10
ns
fCLK
Maximum Clock Frequency
(Cascade Operation)
30
50
MHz
tP3,ON
Low-Current Test Mode
Propagation Delay Time
Turn ON
3
5
µs
tTP3,OFF
Turn OFF
0.05
0.1
µs
tREXT2,1
External Resistor Reaction Time
Change from REXT1 = 372
Ω,
IOUT1 = 50.52mA to REXT2 =
37.2k
Ω, IOUT2 < 1mA
0.5
1
µs
tREXT2,1
External Resistor Reaction Time
Change from REXT1 = 37.2k
Ω,
IOUT1 = 0.5mA to REXT2 =
372
Ω, IOUT2 > 25mA
0.5
1
µs
Table 3. Electrical Characteristics (Continued)
Symbol
Parameter
Condition
Min
Typ
Max
Unit



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