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rt9146/7 ? ds9146/7-03 may 2013 www.richtek.com 1 ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. ordering information note : richtek products are : ` rohs compliant and compatible with the current require- ments of ipc/jedec j-std-020. ` suitable for use in snpb or pb-free soldering processes. pin configurations (top view) wdfn-8l 3x3 / wdfn-8sl 3x3 rt9146 applications z tft-lcd panels z notebook computers z monitors z lcd tvs 20v, 1a, rail-to-rail operational amplifier general description the rt9146/7 consists of a low power, high slew rate, single supply rail-to-rail input and output operational amplifier. the rt9146 contains a single amplifier and the rt9147 contains two amplifiers in one package. the rt9146/7 has a high slew rate (35v/ s), 1a peak output current and offset voltage below 15mv. the rt9146/ 7 is ideal for thin film transistor liquid crystal displays (tft-lcd) . the rt9146 is available in the wdfn-8l 3x3 package, and the rt9147 is available in the wqfn-16l 4x4 package. the rt9146/7 are specified for operation over the full ? 40 c to 85 c temperature range. features z z z z z rail-to-rail output swing z z z z z supply voltage : 6v to 20v z z z z z peak output current : 1a z z z z z high slew rate : 35v/ s z z z z z unity gain stable z z z z z rohs compliant and halogen free nc vin- vs- nc vs+ vout nc vin+ 7 6 5 1 2 3 4 8 vs- 9 wqfn-16l 4x4 rt9147 nc nc vs+ nc nc nc vouta vina- vinb- vinb+ vina+ vs- nc nc nc voutb 1 2 3 4 56 78 12 11 10 9 13 16 14 15 17 vs- rt9147 package type qw : wqfn-16l 4x4 lead plating system z : eco (ecological element with halogen free and pb free) rt9146 package type qw : wdfn-8l 3x3 qwa : wdfn-8sl 3x3 lead plating system z : eco (ecological element with halogen free and pb free) 43 : product code ymdnn : date code marking information rt9146zqw 85 ym dnn 85 : product code ymdnn : date code RT9147ZQW 43 ym dnn rt9146zqwa 2w : product code ymdnn : date code 2w ym dnn
rt9146/7 2 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. rt9146 pin no. wdfn-8l 3x3 wdfn-8sl 3x3 pin name pin function 1, 5, 8 nc no internal connection. 2 vin ? negative input. 3 vin+ positive input. 4, 9 (exposed pad) vs ? negative supply input. the exposed pad must be soldered to a large pcb and connected to vs ? for maximum power dissipation. 6 vout output. 7 vs+ positive supply input. bypass vs+ to vs ? with a 0.1 f capacitor placed as close as possible to the device. rt9147 pin no. pin name pin function 1, 2, 4, 5, 6, 13, 15, 16 nc no internal connection. 3 vs+ positive supply input. bypass vs+ to vs ? with a 0.1 f capacitor placed as close as possible to the device. 7 vouta output of amplifier a. 8 vina ? positive input of amplifier a. 9 vina+ negative input of amplifier a. 10, 17 (exposed pad) vs ? negative supply input. the exposed pad must be soldered to a large pcb and connected to vs ? for maximum power dissipation. 11 vinb+ positive input of amplifier b. 12 vinb ? negative input of amplifier b. 14 voutb output of amplifier b. functional pin description typical application circuit vs+ vs- + - vinx+ vinx- voutx vs+ r s * tft-lcd capacitance * : r s may be needed for some applications.
rt9146/7 3 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. function block diagram vs+ vs- vouta vina- vina+ + - voutb + - vinb- vinb+ rt9146 rt9147 - + vin- vin+ vs+ vout vs-
rt9146/7 4 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. recommended operating conditions (note 4) z supply voltage, vs ? = 0v, vs+ ----------------------------------------------------------------------------------------- 6v to 20v z junction temperature range ---------------------------------------------------------------------------------------------- ? 40 c to 125 c z ambient temperature range ---------------------------------------------------------------------------------------------- ? 40 c to 85 c absolute maximum ratings (note 1) z supply voltage, (vs+ to vs ? ) ------------------------------------------------------------------------------------------- 24v z vinx+, vinx ? to vs ? ------------------------------------------------------------------------------------------------------- ? 0.3v to 24v z vinx+ to vinx ? -------------------------------------------------------------------------------------------------------------- 5v z power dissipation, p d @ t a = 25 c wdf n-8l 3x3 ---------------------------------------------------------------------------------------------------------------- 3 .22w wdf n-8sl 3x3 -------------------------------------------------------------------------------------------------------------- 3. 22w wqfn-16l 4x4 -------------------------------------------------------------------------------------------------------------- 3. 51w z package thermal resistance (note 2) wdfn-8l 3x3, ja ----------------------------------------------------------------------------------------------------------- 31 c/w wdfn-8l 3x3, jc ----------------------------------------------------------------------------------------------------------- 8 c/w wdfn-8sl 3x3, ja --------------------------------------------------------------------------------------------------------- 31 c/w wdfn-8sl 3x3, jc -------------------------------------------------------------------------------------------------------- 8 c/w wqfn-16l 4x4, ja --------------------------------------------------------------------------------------------------------- 28.5 c/w wqfn-16l 4x4, jc -------------------------------------------------------------------------------------------------------- 7 c/w z lead temperature (soldering, 10 sec.) --------------------------------------------------------------------------------- 260 c z junction temperature ------------------------------------------------------------------------------------------------------- 150 c z storage temperature range ---------------------------------------------------------------------------------------------- ? 65 c to 150 c z esd susceptibility (note 3) hbm (human body model) ------------------------------------------------------------------------------------------------ 2kv mm (ma chine model) ------------------------------------------------------------------------------------------------------- 200v (v s+ = 16v, v s ? = 0v, v inx+ = v outx = v s+ / 2, t a = 25 c, unless otherwise specified) electrical characteristics parameter symbol test conditions min typ max unit input characteristics input offset voltage v os v cm = v s+ / 2 -- 2 15 mv input bias current i b v cm = v s+ / 2 -- 2 50 na i outx = 0 to ? 80ma -- 0.1 -- load regulation v load i outx = 0 to 80ma -- ? 0.1 -- mv/ma common mode input range cmir 0.5 -- v s+ ? 0.5 v common mode rejection ratio cmrr 0.5v v outx v s+ ? 0.5v -- 95 -- db open loop gain a vol 0.5v v outx v s+ ? 0.5v -- 118 -- db
rt9146/7 5 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. note 1. stresses beyond those listed ? absolute maximum ratings ? 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 the operational sections of the specifications is not implied. exposure to absolute maximum rating conditions may affect device reliability. note 2. ja is measured at t a = 25 c on a high effective thermal conductivity four-layer test board per jedec 51-7. jc is measured at the exposed pad of the package. note 3. devices are esd sensitive. handling precaution is recommended. note 4. the device is not guaranteed to function outside its operating conditions. parameter symbol test conditions min typ max unit output characteristics output swing low v ol i l = ? 50ma -- 0.6 1.5 v output swing high v oh i l = 50ma v s+ ? 1.5 v s+ ? 0.3 -- v transient peak output current i pk 800 1000 1400 ma power supply power supply rejection ratio psrr v s+ = 6v to 20v, v cm = v outx = v s+ / 2 -- 96 -- db quiescent current i dd no load -- 4 -- ma dynamic performance slew rate sr 4v step, 20% to 80%, a v = 1 -- 35 -- v/ s setting to 0.1% (av = 1) t s a v = 1, v outx = 2v step r l = 10k , c l = 10pf -- 270 -- ns ? 3db bandwidth bw r l = 10k , c l = 10pf -- 16 -- mhz gain-bandwidth product gbwp r l = 10k , c l = 10pf -- 12 -- mhz phase margin pm r l = 10k , c l = 10pf -- 50 -- -- thermal shutdown temperature t s temperature rising -- 150 -- c thermal shutdown hysteresis t s -- 20 -- c
rt9146/7 6 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. typical operating characteristics rail to rail time (25 s/div) v in+ (4v/div) v out (4v/div) unity gain, v in+ = 0.5v to 15.5v, v s+ = 16v, v s ? = 0v, f = 10khz input offset voltage vs. temperature -3 -2 -1 0 1 -50 -25 0 25 50 75 100 125 temperature (c) input offset voltage (mv) unity gain, v in+ = 8v, v s+ = 16v, v s ? = 0v supply current vs. temperature 0 1 2 3 4 5 -50 -25 0 25 50 75 100 125 temperature (c) supply current (ma ) unity gain, v in+ = 8v, v s+ = 16v, v s ? = 0v input offset voltage vs. supply voltage -1.5 -1.0 -0.5 0.0 6 8 10 12 14 16 18 20 supply voltage (v) input offset voltage (mv) unity gain, v in+ = v s+ / 2, v s+ = 6v to 20v, v s ? = 0v supply current vs. supply voltage 1 2 3 4 5 6 8 10 12 14 16 18 20 supply voltage (v) supply current (ma ) unity gain, v in+ = v s+ / 2, v s+ = 6v to 20v, v s ? = 0v output voltage swing vs. supply voltage -0.6 -0.4 -0.2 0.0 0.2 0.4 6 8 10 12 14 16 18 20 supply voltage (v) output voltage swing (v ) v s+ = 6v to 20v, v s ? = 0v swing low, v in+ = 0v, v in ? = 3v, i load = ? 50ma swing high, v in+ = 3v, v in ? = 0v, i load = 50ma
rt9146/7 7 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. small signal response time (2.5 s/div) v in+_ac coupled (100mv/div) unity gain, v in+ = 7.9v to 8.1v, v s+ = 16v, v s ? = 0v, f = 100khz v out_ac coupled (100mv/div) large signal response time (2.5 s/div) unity gain, v in+ = 6v to 10v, v s+ = 16v, v s ? = 0v, f = 100khz v in+_ac coupled (2v/div) v out_ac coupled (2v/div) slew rate time (50ns/div) v in+ (5v/div) unity gain, v in+ = 4v to 8v, v s+ = 16v, v s ? = 0v, f = 10khz v out (5v/div) rising slew rate time (50ns/div) unity gain, v in+ = 8v to 4v, v s+ = 16v, v s ? = 0v, f = 10khz v in+ (5v/div) v out (5v/div) falling gain bandwidth product unity gain, v in+ = 8v, v s+ = 16v, v s ? = 0v, r l = 10k , c l = 10pf ? ? ? ? ? 3db bandwidth unity gain, v in+ = 8v, v s+ = 16v, v s ? = 0v, r l = 10k , c l = 10pf
rt9146/7 8 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. figure 1. derating curve of maximum power dissipation applications information the rt9146/7 is a high performance operational amplifier capable of driving large loads for different applications. a high slew rates, rail-to-rail input and output capability, and low power consumption are the features which make the rt9146/7 ideal for lcd applications. the rt9146/7 also has wide bandwidth and phase margin to drive a load with 10k resistance and 10pf capacitance. operating voltage the rt9146/7 total supply voltage range is guaranteed from 6v to 20v. the specifications are stable over both full supply range and operating temperatures from ? 40 c to 85 c. the output swing of the rt9146/7 typically extends to within 1.5v of positive/negative supply rails with 50ma load current source/sink. decreasing the load current will obtain an output swing even closer to the supply rails. short-circuit condition an internal short-circuit protection is implemented to protect the device from output short-circuit. the rt9146/ 7 limits the short-circuit current to 1a if the output is directly shorted to positive/negative supply rails. lcd panel applications the rt9146/7 is mainly designed for lcd v-com buffer. the operational amplifier has 1a instantaneous source/ sink peak current. thermal considerations for continuous operation, do not exceed absolute maximum junction temperature. the maximum power dissipation depends on the thermal resistance of the ic package, pcb layout, rate of surrounding airflow, and difference between junction and ambient temperature. the maximum power dissipation can be calculated by the following formula : p d(max) = (t j(max) ? t a ) / ja where t j(max) is the maximum junction temperature, t a is the ambient temperature, and ja is the junction to ambient thermal resistance. for recommended operating condition specifications, the maximum junction temperature is 125 c. the junction to ambient thermal resistance, ja , is layout dependent. for wdfn-8l 3x3 package, the thermal resistance, ja , is 31 c/w on a standard jedec 51-7 four-layer thermal test board. for wdfn-8sl 3x3 package, the thermal resistance, ja , is 31 c/w on a standard jedec 51-7 four-layer thermal test board. for wqfn-16l 4x4 package, the thermal resistance, ja , is 28.5 c/w on a standard jedec 51-7 four-layer thermal test board. the maximum power dissipation at t a = 25 c can be calculated by the following formula : p d(max) = (125 c ? 25 c) / (31 c/w) = 3.22w for wdfn-8l 3x3 package p d(max) = (125 c ? 25 c) / (31 c/w) = 3.22w for wdfn-8sl 3x3 package p d(max) = (125 c ? 25 c) / (28.5 c/w) = 3.51w for wqfn-16l 4x4 package the maximum power dissipation depends on the operating ambient temperature for fixed t j(max) and thermal resistance, ja . the derating curve in figure 1 allows the designer to see the effect of rising ambient temperature on the maximum power dissipation. 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 25 50 75 100 125 ambient temperature (c) maximum power dissipation (w) 1 four-layer pcb wqfn-16l 4x4 wdfn-8l 3x3 wdfn-8sl 3x3
rt9146/7 9 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. layout consideration pcb layout is very important for designing power converter circuits. the following layout guidelines should be strictly followed for best performance of the rt9146/7. ` place the power components as close to the ic as possible. the traces should be wide and short, especially for the high current loop. ` a series resistance may be needed at the output for some applications. ` connect a 0.1 f capacitor from vinx+ to ground and place it as close to the ic as possible for better performance. ` the exposed pad of the chip should be connected to a large pcb plane for maximum thermal consideration.
rt9146/7 10 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. outline dimension dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 d 2.950 3.050 0.116 0.120 d2 2.100 2.350 0.083 0.093 e 2.950 3.050 0.116 0.120 e2 1.350 1.600 0.053 0.063 e 0.650 0.026 l 0.425 0.525 0.017 0.021 w-type 8l dfn 3x3 package 1 1 2 2 note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options d 1 e a3 a a1 d2 e2 l b e see detail a
rt9146/7 11 ds9146/7-03 may 2013 www.richtek.com ? copyright 2013 richtek technology corporation. all rights reserved. is a registered trademark of ric htek technology corporation. w-type 8sl dfn 3x3 package min. max. min. max. a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.200 0.300 0.008 0.012 d 2.900 3.100 0.114 0.122 d2 2.250 2.350 0.089 0.093 e 2.900 3.100 0.114 0.122 e2 1.450 1.550 0.057 0.061 e l 0.300 0.400 0.012 0.016 symbol dimensions in millimeters dimensions in inches 0.650 0.026 1 1 2 2 note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options
rt9146/7 12 ds9146/7-03 may 2013 www.richtek.com richtek technology corporation 5f, no. 20, taiyuen street, chupei city hsinchu, taiwan, r.o.c. tel: (8863)5526789 richtek products are sold by description only. richtek reserves the right to change the circuitry and/or specifications without notice at any time. customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete. richtek cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a richtek product. information furnish ed by richtek is believed to be accurate and reliable. however, no responsibility is assumed by richtek or its subsidiaries for its use; nor for any infringeme nts of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of r ichtek or its subsidiaries. a a1 a3 d e 1 d2 e2 l b e see detail a dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a3 0.175 0.250 0.007 0.010 b 0.250 0.380 0.010 0.015 d 3.950 4.050 0.156 0.159 d2 2.000 2.450 0.079 0.096 e 3.950 4.050 0.156 0.159 e2 2.000 2.450 0.079 0.096 e 0.650 0.026 l 0.500 0.600 0.020 0.024 w-type 16l qfn 4x4 package note : the configuration of the pin #1 identifier is optional, but must be located within the zone indicated. det ail a pin #1 id and tie bar mark options 1 1 2 2

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