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austriamicrosystems ag is now ams ag the technical content of this austriamicrosystems datasheet is still valid. contact information: headquarters: ams ag tobelbaderstrasse 30 8141 unterpremstaetten, austria tel: +43 (0) 3136 500 0 e - mail: ams_sales @ams.com please visit our website at www.ams.com
a s 11 22 1 2- c h a n n e l l e d d ri v er w i t h d o t co rr e c ti o n a n d g r ey s c a l e p w m www.austriamicrosystems.com/leddriverics r evision 1.00 1 22 d a ta s hee t 1 general description the as1122 is a 12channel, constant currentsink led driver. each o f the 12 channels can be individually adjusted by 4096step greyscale pwm brightness control and 64step constantcurrent sink (dot correction). the dot correction circuitry adjusts the brightness variations between the as1122 channels and other led drivers. greyscale control and dot correction circuitry are accessible via a simple spicompatible serial interface. the open led detection function indicates a broken or disconnected led at one or more of the outputs. the overtemperature flag indi cates that the device is in an overtemperature condition. a single external resistor sets the maximum current value of all 12 channels. the as1122 is available in a 24pin qfn 4x4mm package. figure 1. as1122 - typical application diagram 2 key features greyscale pwm control: 12bit (4096 steps) dot correction: 6bit (64 steps) drive capability (constantcurrent sink): 0 to 40ma led power supply voltage: up to 30v supply voltage range: 2.7v to 3.6v output delay for controlled inrush current (factory set, can be t urned off) factory set rise and falltime for emi improvement internal pwm clock: 10 mhz (typ) data transfer clock rate: up to 5 mhz cmos level i/o diagnostic features 24pin qfn 4x4mm package 3 applications the device is ideal for mono, multi, and fullcolor led displays, l ed signboards, and display backlights. ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 2 22 as1122 datasheet p i n o u t 4 pinout p in assignments figure 2. pin assignments (top view) pin descriptions table 1. pin descriptions pin number pin name description 1 sdi serial data input 2 clki serial data clock input 5 clko serial data clock output 6 sdo serial data output 7:12, 19:24 out0:out11 constant-current outputs 0:11 13 vdd power supply voltage 14 irq interrupt request output. open drain pin, can be left open if not used. 15 rst reset input. pull this pin to high to reset all registers (set to default values) and to put the device into shutdown. connect this pin to gnd for normal operation. 16 iref reference current terminal. a resistor connected to this pin sets the maximum output currents (see se tting maximum channel current on page 15) . 18 g nd ground 3, 4, 17 nc not connected. connect to gnd if not used. 25 thermal pad ground. this pin must be connected to gnd to ensure normal operation. ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 3 22 as1122 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 stresses beyond those listed in t able 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 electrical characteristics on page 4 is not implied. exposure to absolute ma ximum rating conditions for extended periods may affect device reliability. table 2. absolute maximum ratings parameter min max units comments electrical parameters vcc to gnd 0.3 5 v all other pins to gnd 0.3 v dd + 0.3 v v sdo to gnd 0.3 v dd + 0.3 v v out0 : vout11 to gnd 0.3 30 v output current 50 ma input current (latchup immunity) 100 100 ma norm: jedec 78 electrostatic discharge electrostatic discharge hbm +/ 2 kv norm: mil 883 e method 3015 thermal information junction to ambient thermal resistance 37 c/w for more information about thermal metrics, see application note an01 thermal characteristics. temperature ranges and storage conditions junction temperature +150 oc storage temperature range 55 +150 oc package body temperature +260 oc the reflow peak soldering temperature (body temperature) specified is in accordance with ipc/jedec j-std- 020moisture/reflow sensitivity classification for non- hermetic solid state surface mount devices. the lead finish for pbfree leaded packages is matte tin (100% sn). humidity noncondensing 5 85 % moisture sensitive level 3 represents a max. floor life time of 168h ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 4 22 as1122 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 +3.6v, typical values are at t amb = +25c, v dd = 3.3v (unless otherwise specified). all limits are guaranteed. the parameters w ith min and max values are guaranteed with production tests or sqc (statistical quality control) methods. table 3. electrical characteristics symbol parameter condition min typ max unit t amb operating temperature range 40 +85 c t j o perating junction temperature 40 +125 c input supply v dd s upply voltage 2.7 3.6 v i cc supply current a ll outputs on, r iref = 1k w 9 .5 12 ma all outputs on, r iref = 10k w 4 6 i pd power down current r st = high, t amb = +25c 4 0 na output r iref reference current resistor 1 10 k w v out v oltage applied to output (out0:out11) 30 v i coc constant output current a ll outputs on, v out = 1v, r iref = 1k w 3 8 40 42 ma d i coc constant output current error v out = 1v, r iref = 1k w , out0:out11 0.8 2 % v out = 1v, r iref = 10k w , out0:out11 1.5 4 device to device, average current from out0:out11, v out = 1v, r iref = 1k w 0.5 device to device, average current from out0:out11, v out = 1v, r iref = 10k w 0.6 i leak leakage output current a ll outputs off, v out = 30v, r iref = 1k w , out0:out11 20 na d i lnr line regulation v out = 1v, r iref = 1k w out0:out11 0.1 1.5 %/v v out = 1v, r iref = 10k w out0:out11 0.2 1.5 d i ldr load regulation v out = 1v to 4v, r iref = 1k w , out0:out11 0.1 0.4 %/v v out = 1v to 4v, r iref = 10k w , out0:out11 0.01 0.4 logic levels v ih highlevel input voltage 0 .8 x v dd v dd v v il lowlevel input voltage g nd 0.2 x v dd v v oh highlevel output voltage i oh = 1ma, sdo, clko v dd 0.5 v v ol lowlevel output voltage i ol = 1ma, sdo, clko 0 .5 v i ol = 3ma, irq 0 .5 v v lod led open detection threshold 0 .3 0.4 v v iref reference voltage output r iref = 1k w 1 .24 1.27 1.30 v ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 5 22 as1122 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 timing characteristics v dd = +2.7v to +3.6v, t amb = -40c to +85 o c. typical values are at t amb = +25c, v dd = 3.3v (unless otherwise specified). interface characteristics v dd = +2.7v to +3.6v, t amb = -40c to +85 o c. typical values are at t amb = +25c, v dd = 3.3v (unless otherwise specified). figure 3. load circuit for digital output timing specifications table 4. output timing characteristics symbol parameter conditions min typ max unit t r_out rise time out 1 1. value can be factory trimmed for emi improvement. 20 ns t f_out fall time out 1 20 ns t d 2 2. see figure 24 on page 10 . av erage output delay time (can be turned off on request) 25 ns table 5. serial interface timing characteristics symbol parameter conditions min typ max unit f osc oscillator frequency 8 10 12 mhz f clk data shift clock frequency 1 5 mhz t low 1 1. see figure 24 on page 10 clk low time during data shift 1 s t capt 1 clk low time for data capture 1.5 1.8 2.85 s t setup 2 2. see figure 36 on page 16 and figure 37 on page 16 setup time sdi, clki 12 ns t hold 2 hold time sdi, clki 12 ns t pd_rising 2 delay clki to clko 3 3. guaranteed by design and not production tested. rising clki to rising clko 2 3.5 8 ns t pd_falling 2 delay clki to clko 3 rising clki to falling clko 72 103.5 138 ns t pd_sdo 2 delay clko to sdo 3 falling edge clko 0.8 1.5 3 ns t h_clko 2 high time of clko 3 70 100 130 ns t r_clk r ise time clk 3 c load = 20pf 1 0 ns t r_data r ise time data 3 c load = 20pf 1 0 ns c load 20pf s do clko vdd/2 200a i ol 200a i oh ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 6 22 as112 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 t amb = +25c, v dd = 3.0v, v out = 1.0v (unless otherwise specified) f igure 4. constant output current vs. output voltage figure 5. constant output current vs. output voltage 0 5 10 15 20 25 30 35 40 45 50 0 1 2 3 4 5 6 7 8 9 10 constant output current (ma) output voltage (v) icoc = 40ma (1k w ) icoc = 20ma (2k w ) icoc = 8ma (4.7k w ) icoc = 4ma (10k w ) 0 5 10 15 20 25 30 35 40 45 50 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 constant output current (ma) output voltage (v) icoc = 40ma (1k w ) icoc = 20ma (2k w ) icoc = 8ma (4.7k w ) icoc = 4ma (10k w ) figure 6. constant output current vs. v out ; r zxt = 1k w figure 7. constant output current vs. v out ; r zxt = 1k w 0 5 10 15 20 25 30 35 40 45 50 0 1 2 3 4 5 6 7 8 9 10 constant output current (ma) output voltage (v) -40c +25c +85c 0 5 10 15 20 25 30 35 40 45 50 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 constant output current (ma) output voltage (v) -40c +25c +85c figure 8. i yoy vs. supply voltage; r zxt = 1k w figure 9. i yoy vs. supply voltage; r zxt = 10k w 39 39.25 39.5 39.75 40 40.25 40.5 40.75 41 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 constant output current (ma) supply voltage (v) -40c +25c +85c 3.9 3.94 3.98 4.02 4.06 4.1 2.7 2.8 2.9 3 3.1 3.2 3.3 3.4 3.5 3.6 constant output current (ma) supply voltage (v) -40c +25c +85c ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 7 22 as112 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 10. i coc vs. temperature; r ext = 1k w figure 11. i coc vs. temperature; r ext = 10k w 38 38.5 39 39.5 40 40.5 41 41.5 42 -40 -15 10 35 60 85 constant output current (ma) ambient temperature( c) vdd = 2.7v vdd = 3.0v vdd = 3.6v 3.8 3.85 3.9 3.95 4 4.05 4.1 4.15 4.2 -40 -15 10 35 60 85 constant output current (ma) ambient temperature( c) vdd = 2.7v vdd = 3.0v vdd = 3.6v figure 12. i coc vs. r ext f igure 13. i coc vs. dot correction; r ext = 1k w 0 5 10 15 20 25 30 35 40 0 2 4 6 8 10 constant output current (ma) r iref (kohm) 0 5 10 15 20 25 30 35 40 0 9 18 27 36 45 54 63 constant output current (ma) dot correction figure 14. i coc vs. pwm; r ext = 1k w figure 15. i coc vs. pwm; r ext = 1k w 0 5 10 15 20 25 30 35 40 0 500 1000 1500 2000 2500 3000 3500 4000 constant output current (ma) pwm (#) 0 0.1 0.2 0.3 0.4 0 2 4 6 8 10 12 14 16 18 20 constant output current (ma) pwm (#) ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 8 22 as112 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 16. d i coc vs. constant output voltage; r ext = 1k w f igure 17. d i coc vs. constant output voltage; r ext = 10k w 0 0.25 0.5 0.75 1 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 constant output current error (%) output voltage (v) -40c +25c +85c 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 0.2 0.6 1 1.4 1.8 2.2 2.6 3 3.4 3.8 4.2 4.6 5 constant output current error (%) output voltage (v) -40c +25c +85c figure 18. d i coc vs. temperature; r ext = 1k w f igure 19. d i coc vs. temperature; r ext = 10k w 0 0.25 0.5 0.75 1 -40 -15 10 35 60 85 constant output current error (%) ambient temperature ( c) vdd = 2.7v vdd = 3.0v vdd = 3.6v 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 -40 -15 10 35 60 85 constant output current error (%) ambient temperature ( c) vdd = 2.7v vdd = 3.0v vdd = 3.6v figure 20. supply current vs. temperature; r ext = 1k w figure 21. supply current vs. temperature; r ext = 10k w 7 7.5 8 8.5 9 9.5 10 10.5 11 -40 -15 10 35 60 85 supply current (ma) ambient temperature ( c) vdd = 2.7v vdd = 3.0v vdd = 3.6v 2 2.5 3 3.5 4 4.5 5 5.5 6 -40 -15 10 35 60 85 supply current (ma) ambient temperature (c) vdd = 2.7v vdd = 3.0v vdd = 3.6v ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 9 22 as112 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 22. led open detection threshold vs. temperature f igure 23. d i coc matching vs. dot correction; r ext = 1k w 0 0.1 0.2 0.3 0.4 0.5 0.6 -40 -15 10 35 60 85 led open detection threshold (v) ambient temperature(c) vdd = 2.7v vdd = 3.0v vdd = 3.6v 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 0 9 18 27 36 45 54 63 i coc matching (%) dot correction ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 10 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n 8 detailed description s erial interface the as1122 features a 4pin (clki, clko, sdi, and sdo) serial interface, which can be connected to microcontrollers or digital signal proces s ors. the rising edge of the clki signal shifts data from pin sdi to the internal register. after all data are clocked in, the serial data are latched into the internal registers at the rising edge of the internal ld signal (see figure 24) . the internal ld signal is triggered after the clk i s low for a time t capt a nd all data are clocked in. with the first 8 clkcycles an 8 bit identifier needs to be send to the device to distinguish between status information, dot correction, pwm or command data. after the internal ld signal the internal counter is set to 0 again and the data are latched into the register according to the prior identifier. if the ld triggers and the counter has no valid value (80 bit for dotcorrection, 152 bit for pwm data or 16 bit for command data), the counter is set to 0 but the data will be ignored. with the falling edge of the clko the data is shifted to sdo. figure 24. pwm cycle timing diagram ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 11 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n register access before data are accepted by the as1122, an identifier needs to be send in advance. only 3 defined identifiers will be recognized, all other bit c ombinations will be ignored. the identifier maps the input register to the identified register and all data on pin sdi will be clocked into this register. this selection is valid as long as no internal ld signal is triggered. when data is latched into the device the identifier selection is reset and for the next data word a new identifier needs to be send. every identifier requires a certain data section length. if this length is not corresponding with the identifier, the data will be ignored. note: bit3 of the identifier is an global on/off bit. when bit3 of any identifier is set to logic 0 and the oen bit of the command register (see f i gure 7 on page 14) is 0 (per default), the output channels are immedi ately turned on. dot correction (dc) the as1122 offers a 6 bit (64 steps) dot correction per output channel. after sending the 8 bit identifier for access to the dc register the device i s waiting for 72 bits to receive. if more or less bits are send the whole dataword will be ignored. figure 25. dot correction input timing diagram for n devices in a chain only one identifier needs to be send to set all n devices to the same register setting. figure 26. dot correction for n-devices table 6. identifier identifier bit data section length description 7 6 5 4 3 2 1 0 dot correction data 1 1 0 0 1 / 0 0 0 1 72 bits writes data into dot correction register pwm data 1 1 0 0 1 / 0 0 1 0 144 bits writes data into pwm register command data 1 1 0 0 1 / 0 1 0 0 8 bits writes data into command register ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 12 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n pwm data to set the pwm, 12 bit (4096 steps) per output channel can be used. after sending the 8 bit identifier for access to the pwm data register the d evice is waiting for 144 bits to receive. if more or less bits are send the whole dataword will be ignored. figure 27. pwm input timing diagram for n devices in a chain only one identifier needs to be send to set all n devices to the same register setting. figure 28. pwm data for n-devices command data the as1122 offers a command register for setting the configuration of the device. the command register is again accessible via an identifier and i s 8 bits long. if more or less bits are send the whole dataword will be ignored. figure 29. command input timing diagram ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 13 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n for n devices in a chain only one identifier needs to be send to set all n devices to the same register setting. f igure 30. command data for n-devices setting dot correction the as1122 can perform independent fineadjustments to the output current of each channel. dot correction is used to adjust brightness devia t ions of leds connected to the output channels (out0:out11). the device powers up with the following default settings: dc = 0 and gs = 0. the 12 channels can be individually programmed with a 6bit word for dot correction. the channel output can be adjusted in 64 steps from 0 to 100% of the maximum output current (i max ). the output current for each out n channel can be calculated as: where: i max is the maximum programmable output current for each output; d c n is the programmed dot correction value for output (dc n = 0 to 63); n = 0 to 11 dot correction data are simultaneously entered for all channels. the complete dot correction data format consists of 12 x 6bit words, which forms a 72bit serial data packet (see figure 31) and 8bit for the identifier. channel data is put o n one by one, and the data is clocked in with the msb first. figure 31. dot correction data packet format the dot correction data is only valid if the exact identifier byte was send. otherwise the data will be ignored. setting greyscale brightness (pwm) the brightness of each channel output can be adjusted using a 12 bitsperchannel pwm control scheme which results in 4096 brightness steps, f rom 0% to 100% brightness. the brightness level for each output is calculated as: where: gs n is the programmed greyscale value for out n (gs n = 0 to 4095); n = 0 to 11 greyscale data for all outputs. the device powers up with the following default settings: gs = 0 and dc = 0. i out n = i max x dc n 63 (eq 1) %brightness = gs n 4095 (eq 2) x 100 ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 14 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n the input shift register shifts greyscale data into the greyscale register for all channels simultaneously. the complete greyscale data format con s ists of 12 x 12 bit words, which forms a 144bit wide data packet (see figure 32) plus the 8bit for the identifier. fi gure 32. pwm data packet format the pwm data is only valid if the exact identifier byte was send. otherwise the data will be ignored. command data in the command register of the as1122 some configuration of the device can be done. after sending the correct identifier the 8 bits of the com m and register are accessible. the complete status information data packet is shown in figure 33 . f i gure 33. command packet format table 7. command register format bit bit name default access bit description 7:5 000 n/a 4 read sid 0 w 0: normal operation 1: read status information register (sid) 3 open test 0 w 0: no test is running 1: start open test 2 over temperature power down 0 w 0: if an overtemperature condition occurs the outn are not switched off automatically. 1: if an overtemperature condition occurs the outn are switched off automatically. 1 display one time 0 w 0: the pwm is running endless 1: the pwm is running for one cycle 0 oen 0 w 0: this bit must be 0 as well as bit3 of the last valid identifier to turn on all channels. 1: all channels are off ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 15 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n status information data (sid) the as1122 contains an integrated status information register. after latching the correct identifier with a 16 bit data word the input shift register d ata is replaced with status information data. with the next 16 clock cycles the open led information, the overtemperaturewarning and error flag as well as the poweron reset (por) flag can be read out at pin sdo. the status information data packet is 16 bits wide. bits 11:0 contain the open led detection status of each channel. bit 12 is the overtemperaturewarning flag, bit 13 is the overtemperatureerror flag and bit 14 indicates if the por was triggered. the complete status information data packet is shown in figure 34 . f i gure 34. status information data packet format note: bit14 (por) is set to 1 after startup and after triggering a poweron reset due to a supply voltage drop. must be set to 0 manually. readback the status information data to read out the sid the read bit in the command data needs to be set to 1. after the new command data is lachted into the device the sid is s hifted to the sdo register and will be shifted out with the next running clk cycles on clki. after keeping the clk low for the time tlow, the device is reset again and can be programmed with need information. figure 35. reading of the status information register setting maximum channel current the maximum output current per channel is programmed by a single resistor r iref , which is placed between pin i ref and gnd. the voltage on p in i ref is set by an internal band gap v iref (1.27v typ). the maximum channel current is equivalent to the current flowing through r iref mul t iplied by a factor of 31.5. the maximum output current is calculated as: where: v iref = 1.27v; r iref = userselected external resistor. i max = v iref r iref x 31.5 ( eq 3) ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 16 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n timing for cascading of n-devices with the rising edge of clki the data will shifted from sdi into the device. the rising edge of clki is shifted through the devices to clko. after a factory fixed hightime (100ns) the falling edge of clko is triggered and the data are shifted out via sdo. this ensures a synchronous timing between clko and sdo. the clk period (frequency) will stay the same only the duty cycle will be changed. the fixed hightime will vary with +/ 30%. figure 36. clock handling with 5mhz data-clock figure 37. clock handling with 2mhz data-clock ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 17 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n scrambled pwm general due to the possibility to interrupt a running pwm cycle the as1122 is useing a scrambled pwm. the advantage is, that the scrambled pwm will c ause less error as the classical pwm when data is updated during a running pwm cycle. as an example, we take a look on a system with a 8bit pwm and three leds. the pwm for the red led is set to 4, for green to 2 and for blue to 6. in the classical approach the red, green and blue channels are high according to their pwm setting (see figure 38) . i f this pwm cycle would be interrupted at the 4th clock, the red and the blue led would be as bright as if the pwm setting were 8. the green led also would be much brighter than desired. in the scrambled pwm the ontimes are divided evenly over the whole pwm cycle. so if the running pwm cycle is interrupted, the failure is less effective. figure 38. classic pwm vs. scrambled pwm ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 18 22 as1122 datasheet d e t a i l e d d e s c r i p t i o n pwm scheme of as1122 the as1122 uses a scrambled pwm scheme. meaning the pwm value is divide into supperiods (32 bits wide) and than evenly distributed over t he whole pwm cycle. if the pwm setting can not be divided by 32, the rest is added at the beginning of the pwm cycle. figure 39 shows some examples how different pwm settings are d istributed over one pwm cycle. figure 39. different pwm outputs of as1122 the pwm clock is generated internally and is running with f osz (10mhz typ.). for a pwm value of 20 the out channel is high for 20 pwmclock p ulses (20 x 100ns) and stays then low for 4076 pwmclock pulses (4076 x 100ns). after one pwm cycle (4096 pulses) the cycle is repeated endless until the output channels is turned off or updated with new pwm data. ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 19 22 as1122 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 9 package drawings and markings figure 40. 24-pin qfn 4x4mm marking t able 8. packaging code yywwxzz yy ww x zz last two digits of the current year manufacturing week plant identifier free choice / traceability code ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 20 22 as1122 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 41. 24-pin qfn 4x4mm package ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 21 22 as1122 datasheet o r d e r i n g i n f o r m a t i o n 10 ordering information the device is available as the standard products shown in t able 9 . *) on request note: all products are rohs compliant and austriamicrosystems green. buy our products or get free samples online at icdirect: http://www.austriamicrosystems.com/icdirect technical support is found at http://www.austriamicrosystems.com/technicalsupport for further information and requests, please contact us mailto:sales@austriamicrosystems.com or find your local distributor at http://www.austriamicrosystems.com/distributor table 9. ordering information ordering code marking description delivery form package as1122bqft as1122 12channel led driver with dot correction and greyscale pwm tape and reel 24pin qfn 4x4mm as1122bbqft* as1122b 12channel led driver with dot correction and greyscale pwm without output delay tape and reel 24pin qfn 4x4mm ams ag technical content still valid
www.austriamicrosystems.com/leddriverics revision 1.00 2 2 22 as1122 datasheet copyrights copyright ? 19972012, austriamicrosystems ag, tobelbaderstrasse 30, 8141 unterpremstaetten, austriaeurope. 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 any time and without notice. therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems 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 lifesupport or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems 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. 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. contact information headquarters austriamicrosystems ag tobelbaderstrasse 30 a8141 unterpremstaetten, austria tel: +43 (0) 3136 500 0 fax: +43 (0) 3136 525 01 for sales offices, distributors and representatives, please visit: http://www.austriamicrosystems.com/contact ams ag technical content still valid

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