unisonic technologies co., ltd llv321 linear integrated circuit www.unisonic.com.tw 1 of 6 copyright ? 2010 unisonic technologies co., ltd qw-r105-041.a general purpose, low voltage,rail-to-rail output amplifiers ? description the llv321 is a single, low cost and volt age feedback amplifier, that consumes only 80 a supply current, 1.2mhz of bandwidth and 1.5v/ s of slew rate at a low supply voltag e of 2.7v. it is supplied from 2.7v (1.35v) to 5.5v (2.75v). the common mode voltage range extends below the negative rail and the output provides rail-to-rail performance. the llv321 is fabricated on a cmos process. the combination of low power, rail-to-rail performance, low voltage operation, and tiny package options makes the device well suited for use in personal electronics equipment such as cellular handsets, pagers, pdas, and other battery powered applications. the llv321 is also applied in portable test instruments, telephone systems, low cost general purpose applications, cellular phones, mp3 players, personal data assistants, a/d buffer, dsp interface, audio applications, smart card readers, keyless entry, infrared receivers for remote controls, digital still cameras and hard disk drives. ? features (at 2.7v) * input voltage varies from -0.25v to +1.5v * supply current: 80a * output voltage varies from 0.01v to 2.69v * gain bandwidth: 1.2mhz * slew rate: 1.5v/s * fully specified at +2.7v and +5v supplies * operating temperature range: -40c ~ +125c * halogen free ? ordering information ordering number package packing LLV321G-AL5-R sot-353 tape reel LLV321G-AL5-R (1)packing type (2)package type (1) r: tape reel (2) al5: sot-353 (3) g: halogen free (3)halogen free ? marking
llv321 linear integrated circuit unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r105-041.a ? pin configuration 1 2 5 4 + - 3 +in -v s -in out +v s ? pin description pin no. pin name description 1 +in positive input 2 -v s negative supply voltage 3 -in negative input 4 out output 5 +v s positive supply voltage ? logic symbol
llv321 linear integrated circuit unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r105-041.a ? absolute maximum rating parameter symbol ratings unit input voltage v i -v s -0.5~+v s +0.5 v supply voltages vs 0~+6 v maximum junction temperature t j +175 c storage temperature range t stg -65~+150 c note: absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating conditions parameter symbol ratings unit power supply operating v s 2.5~5.5 v ambient operating temperature t opr -40~+125 c ? electrical characteristics (t c = 25c, v s = +2.7v, g = 2, r l = 10k ? to v s /2, r f = 10k ? , v o(dc) = v cc /2; unless otherwise specified) parameter symbol test conditions min typ max unit ac performance gain bandwidth product gbwp c l = 50pf, r l =2k ? to v s /2 1.2 mhz phase margin m 52 deg gain margin g m 17 db slew rate sr v o = 1v pp 1.5 v/s input voltage noise en >50khz 36 nv/ hz dc performance input offset voltage (note 1) v os 1.7 7 mv average drift tcv os 8 v/c input bias current (note 2) i b <1 na input offset current (note 2) i os <1 na power supply rejection ratio (note 1) psrr dc 50 65 db supply current i s 80 120 a input characteristics v cml low 0 -0.25 v input common mode voltage range (note 1) v cmh high 1.5 1.3 v common mode rejection ratio (note 1) cmrr 50 70 db output characteristics v ol r l = 10k ? to v s /2; low 0.1 0.01 v output voltage swing (note 1) v oh r l = 10k ? to v s /2; high 2.69 2.6 v note: 1. guaranteed by testing or statistical analysis at +25c. 2. +in and -in are gates to cmos transistors with typi cal input bias current of <1na. cmos leakage is too small to practically measure. 3. min/max ratings are based on product characterizati on and simulation. individual parameters are tested as noted. outgoing quality levels are determined from tested parameters.
llv321 linear integrated circuit unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r105-041.a ? electrical characteristics (cont.) (t c = 25c, v s = +5v, g = 2, r l = 10k ? to v s /2, r f = 10k ? , v o(dc) = v cc /2; unless otherwise specified) parameter symbol test conditions min typ max unit ac performance gain bandwidth product gbwp c l = 50pf, r l =2k ? to v s /2 1.4 mhz phase margin m 73 deg gain margin g m 12 db slew rate sr 1.5 v/s input voltage noise en >50khz 33 nv/ hz dc performance input offset voltage (note 1) v os 1 7 mv average drift tcv os 6 v/c input bias current (note 2) i b <1 na input offset current (note 2) i os <1 na power supply rejection ratio (note 1) psrr dc 50 65 db open loop gain (note 1) av 50 70 db supply current i s 100 150 a input characteristics v cml low 0 -0.4 v input common mode voltage range (note 1) v cmh high 3.8 3.6 v common mode rejection ratio (note 1) cmrr 50 75 db output characteristics v o r l = 2k ? to v s /2; low/high 0.036~4.95 v v ol r l = 10k ? to v s /2; low (note 1) 0.1 0.013 v output voltage swing v oh r l = 10k ? to v s /2; high (note 1) 4.98 4.9 v i o sourcing; v o =0v 5 +34 ma short circuit output current (note 1) i o sinking; v o =5v 10 -23 ma note: 1. guaranteed by testing or statistical analysis at +25c. 2. +in and -in are gates to cmos transistors with typi cal input bias current of <1na. cmos leakage is too small to practically measure. 3. min/max ratings are based on product characterizati on and simulation. individual parameters are tested as noted. outgoing quality levels are determined from tested parameters.
llv321 linear integrated circuit unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r105-041.a ? application information general description the utc llv321 is a low cost, single supply, low voltage and vo ltage feedback amplifier which is characterized a rail- to- rail output. it is designed to operate on a cmos process, and is unity gain stable. figure 1 shows the typical non-inverting circuit schematic + - utc llv321 0.01f + 6.8f +v s out +in r g r f figure 1. typical non-inverting configuration power dissipation for the utc llv321 , the maximum internal power dissipation is directly depending on the maximum junction temperature. if the maximum junction te mperature is higher than 150c, so me performances are declined. if the maximum junction temperature becomes higher than 175 c for an extended time, device failure may be cause. driving capacitive loads in figure 2, a small series resistance (r s ) at the output of the amplifier, will improve stability and settling performance. driving a capacitive load introduces phase-lag into the output signal, which reduces phase margin in the amplifier. the unity gain follower is the most sensitive configuration. in a unity gain follower configuration, the utc llv321 requires a 450 ? series resistor to drive a 200pf load . the response is as seen in typical characteristic.
llv321 linear integrated circuit unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r105-041.a ? typical characteristic small signal pulse response 12.5 25 time (s) v out1 0 0 100 200 300 0 100 200 300 c l =50pf r s =0 c l =100pf r s =400 c l =200pf r s =450 0.01 0.1 1 10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 frequency (mhz) magnitude (db) frequency response vs. c l for unity gain configuration utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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