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HT9281/ht9282/ht9284 operation amplifier selection table part no. amplifiers package HT9281 1 tsot23-5 ht9282 2 8dip/sop ht9284 4 14dip/sop block diagram rev. 1.00 1 february 11, 2010 features operating voltage: 2.0v to 5.5v supply current: 220 a/amplifier typical rail-to-rail output gain bandwidth: 2.3mhz typical unity gain stable available in single, dual and quad op s package types package type: HT9281: tsot23-5 ht9282: 8-pin dip/sop ht9284: 14-pin dip/sop applications automotive portable equipment photodiode amplifier analog filters notebooks and pdas battery powered systems general description the holtek HT9281/ht9282/ht9284 range of operational amplifiers operate with a single supply voltage as low as 2.0v and offer a low supply current of only 220 a/amplifier. in offering rail-to-rail output voltage the devices can operate with a maximum voltage range. the devices also provide a gain bandwidth product of 2.3mhz and are also unity gain stable. these products are suitable for a wide range of analog signal processing applications but especially suitable for the portable device and battery powered equipment application areas.

pin assignment pin descriptions HT9281 pin no. pin name description 1 out analog output 2 vss negative power supply 3 in+ non-inverting input 4 in- inverting input 5 vdd positive power supply ht9282 pin no. pin name description 1 1out analog output (operation amplifier 1) 2 1in- inverting input (operation amplifier 1) 3 1in+ non-inverting input (operation amplifier 1) 4 vss negative power supply 5 2in+ non-inverting input (operation amplifier 2) 6 2in- inverting input (operation amplifier 2) 7 2out analog output (operation amplifier 2) 8 vdd positive power supply ht9284 pin no. pin name description 1 1out analog output (operation amplifier 1) 2 1in- inverting input (operation amplifier 1) 3 1in+ non-inverting input (operation amplifier 1) 4 vdd positive power supply 5 2in+ non-inverting input (operation amplifier 2) 6 2in- inverting input (operation amplifier 2) 7 2out analog output (operation amplifier 2) 8 3out analog output (operation amplifier 3) 9 3in- inverting input (operation amplifier 3) 10 3in+ non-inverting input (operation amplifier 3) 11 vss negative power supply 12 4in+ non-inverting input (operation amplifier 4) 13 4in- inverting input (operation amplifier 4) 14 4out analog output (operation amplifier 4) HT9281/ht9282/ht9284 rev. 1.00 2 february 11, 2010

absolute maximum ratings supply voltage .......................................................6.0v input voltage..............................v ss 0.3v ~ v dd +0.3v difference input voltage .............................. (v dd v ss ) esd protection on all pins (hbm;mm) ........ 4kv; 400v storage temperature ......................... 65 c to +150c operating temperature ........................ 40 cto+85 c junction temperature ..........................................150 c note: these are stress ratings only. stresses exceeding the range specified under absolute maximum ratings may cause substantial damage to the device. functional operation of this device at other conditions beyond those listed in the specification is not implied and prolonged exposure to extreme conditions may affect device reliability. electrical characteristics unless otherwise indicated, v ss =gnd, ta=25 c, v cm =v dd /2, v l =v dd /2, and r l =10k to v l ,c l =60pf symbol parameter test conditions min. typ. max. unit v dd conditions v dd supply voltage 2.0 5.5 v v os input offset voltage 5v v in =v cm /2 5.0 5.0 mv v os
t drift with temperature 5v v in =v cm /2 2 v/c i os input offset current 5v ta=25c 5 pa i b input bias current 5v ta=25c 50 pa v cm input common mode range 5v 0 v dd 1.4 v v oh v ol maximum output voltage swing 5v 0.5v input overdrive r l =10k to v l v ss +50 v dd 50 mv 0.5v input overdrive r l =2k to v l v ss +150 v dd 250 mv a ol dc open-loop gain (large signal) 5v v out =0.2v to v dd -0.2v, v in =v cm /2 70 100 db gbw gain bandwidth product 5v r l =10k,c l =60pf v in =v cm /2 2.3 mhz m phase margin 5v r l =10k,c l =60pf g=+1v/v, v in+ =v dd /2 63 cmrr common mode rejection ratio 5v v cm =0v to v dd -1.4v 60 90 db psrr power supply rejection ratio 5v v cm =0.2v 65 95 db i cc supply current per single amplifier 5v io=0a 100 220 340 a sr slew rate at unity gain 5v r l =10k,c l =60pf 2 v/ms i o_source output short circuit source current 5v v in+ v in- 10mv 5.0 9.0 ma i o_sink output short circuit sink current 5v v in- v in+ 10mv 5.5 9.5 ma HT9281/ht9282/ht9284 rev. 1.00 3 february 11, 2010
HT9281/ht9282/ht9284 rev. 1.00 4 february 11, 2010 functional description input stage the input stage of op amps are nominal pmos differen - tial amplifiers (see the following diagram), therefore the common mode input voltage can extend to v ss -0.6v. on the other hand the common mode input voltage has to be maintained below (v dd 1.4)v to keep the input de - vice (m2 and m3) active. this implies that when using HT9281/ht9282/ht9284 as a voltage follower, the in - put as well as output active range will be limited be - tween v ss ~v dd -1v (approx.). avoid applying any voltage greater than v dd +0.6v or less than v ss -0.6v to the input pins, otherwise the internal input protection de - vices may be damaged. since the input impedance of pmos is inherently very high, it can directly couple to high impedance elements without loading effect. for example, coupling to ceramic transducers, integrating capacitor and resistor net - works. actually the extremly high input impedance is its major advantage over the bipolar counterpart, in some appli - cation fields such as integrators where the input current of op amp can cause significant error. output stage the HT9281/ht9282/ht9284 uses push-pull cmos configuration as the output stage of op amps to mini - mize low power consumption and to provide adequate output driving current. note that the output is an unbuffered structure, therefore the open loop gain will be affected by the load resistor since the voltage gain of this stage can be expressed as (gm5+ gm6) r l . because of the consideration for minimized power con- sumption, output short circuit current is limited to about -9ma for source drive and 9.5ma for sink drive. this is believed to be enough for most low power systems, however it is recommended to use the load resistor of >10k
for normal applications. in case of heavy load driving, an external buffer stage using bipolar transistors is recommended. the HT9281/ht9282/ht9284 is internally compen - sated for ac stability and capable to withstand up to a 60pf capacitive load.

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application circuits difference amplifier circuit two op amp instrumentation amplifier HT9281/ht9282/ht9284 rev. 1.00 5 february 11, 2010 * * * * + & , , * *

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package information 5-pin tsot23-5 outline dimensions mo-193c symbol dimensions in inch min. nom. max. a 0.043 a1 0.000 0.004 a2 0.028 0.039 b 0.012 0.020 c 0.003 0.008 d 0.114 e 0.110 e1 0.063 e 0.037 e1 0.075 l 0.012 0.024 l1 0.024 08 symbol dimensions in mm min. nom. max. a 1.10 a1 0.00 0.10 a2 0.70 1.00 b 0.30 0.50 c 0.08 0.20 d 2.90 e 2.80 e1 1.60 e 0.95 e1 1.90 l 0.30 0.60 l1 0.60 08 HT9281/ht9282/ht9284 rev. 1.00 6 february 11, 2010
8-pin dip (300mil) outline dimensions symbol dimensions in inch min. nom. max. a 0.355 0.375 b 0.240 0.260 c 0.125 0.135 d 0.125 0.145 e 0.016 0.020 f 0.050 0.070 g 0.100 h 0.295 0.315 i 0.375 symbol dimensions in mm min. nom. max. a 9.02 9.53 b 6.10 6.60 c 3.18 3.43 d 3.18 3.68 e 0.41 0.51 f 1.27 1.78 g 2.54 h 7.49 8.00 i 9.53 HT9281/ht9282/ht9284 rev. 1.00 7 february 11, 2010

14-pin dip (300mil) outline dimensions symbol dimensions in inch min. nom. max. a 0.745 0.775 b 0.240 0.260 c 0.125 0.135 d 0.125 0.145 e 0.016 0.020 f 0.050 0.070 g 0.1100 h 0.295 0.315 i 0.375 symbol dimensions in mm min. nom. max. a 18.92 19.69 b 6.10 6.60 c 3.18 3.43 d 3.18 3.68 e 0.41 0.51 f 1.27 1.78 g 2.54 h 7.49 8.00 i 9.53 HT9281/ht9282/ht9284 rev. 1.00 8 february 11, 2010 2
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8-pin sop (150mil) outline dimensions ms-012 symbol dimensions in inch min. nom. max. a 0.228 0.244 b 0.150 0.157 c 0.012 0.020 c 0.188 0.197 d 0.069 e 0.050 f 0.004 0.010 g 0.016 0.050 h 0.007 0.010 08 symbol dimensions in mm min. nom. max. a 5.79 6.20 b 3.81 3.99 c 0.30 0.51 c 4.78 5.00 d 1.75 e 1.27 f 0.10 0.25 g 0.41 1.27 h 0.18 0.25 08 HT9281/ht9282/ht9284 rev. 1.00 9 february 11, 2010
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14-pin sop (150mil) outline dimensions ms-012 symbol dimensions in inch min. nom. max. a 0.228 0.244 b 0.150 0.157 c 0.012 0.020 c 0.337 0.344 d 0.069 e 0.050 f 0.004 0.010 g 0.016 0.050 h 0.007 0.010 08 symbol dimensions in mm min. nom. max. a 5.79 6.20 b 3.81 3.99 c 0.30 0.51 c 8.56 8.74 d 1.75 e 1.27 f 0.10 0.25 g 0.41 1.27 h 0.18 0.25 08 HT9281/ht9282/ht9284 rev. 1.00 10 february 11, 2010 2
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product tape and reel specifications reel dimensions sop 8n symbol description dimensions in mm a reel outer diameter 330.01.0 b reel inner diameter 100.01.5 c spindle hole diameter 13.0 +0.5/-0.2 d key slit width 2.00.5 t1 space between flange 12.8 +0.3/-0.2 t2 reel thickness 18.20.2 sop 14n symbol description dimensions in mm a reel outer diameter 330.01.0 b reel inner diameter 100.01.5 c spindle hole diameter 13.0 +0.5/-0.2 d key slit width 2.00.5 t1 space between flange 16.8 +0.3/-0.2 t2 reel thickness 22.20.2 tsot23-5 symbol description dimensions in mm a reel outer diameter 178.01.0 b reel inner diameter 60.01.0 c spindle hole diameter 13.0 +0.5/-0.2 d key slit width 2.40.1 t1 space between flange 9.00.5 t2 reel thickness 11.80.5 HT9281/ht9282/ht9284 rev. 1.00 11 february 11, 2010 2

carrier tape dimensions sop 8n symbol description dimensions in mm w carrier tape width 12.0 +0.3/-0.1 p cavity pitch 8.00.1 e perforation position 1.750.1 f cavity to perforation (width direction) 5.50.1 d perforation diameter 1.550.1 d1 cavity hole diameter 1.50 +0.25/-0.00 p0 perforation pitch 4.00.1 p1 cavity to perforation (length direction) 2.00.1 a0 cavity length 6.40.1 b0 cavity width 5.20.1 k0 cavity depth 2.10.1 t carrier tape thickness 0.300.05 c cover tape width 9.30.1 sop 14n symbol description dimensions in mm w carrier tape width 16.0 +0.3/-0.1 p cavity pitch 8.00.1 e perforation position 1.750.1 f cavity to perforation (width direction) 7.50.1 d perforation diameter 1.5 +0.1/-0.0 d1 cavity hole diameter 1.50 +0.25/-0.00 p0 perforation pitch 4.00.1 p1 cavity to perforation (length direction) 2.00.1 a0 cavity length 6.50.1 b0 cavity width 9.50.1 k0 cavity depth 2.10.1 t carrier tape thickness 0.300.05 c cover tape width 13.30.1 HT9281/ht9282/ht9284 rev. 1.00 12 february 11, 2010
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carrier tape dimensions tsot23-5 symbol description dimensions in mm w carrier tape width 8.00.2 p cavity pitch 4.00.1 e perforation position 1.750.10 f cavity to perforation (width direction) 3.500.05 d perforation diameter 1.5 +0.1/-0.0 d1 cavity hole diameter 1.1 +0.1/-0.0 p0 perforation pitch 4.00.1 p1 cavity to perforation (length direction) 2.000.05 a0 cavity length 3.20.1 b0 cavity width 3.20.1 k0 cavity depth 1.10.1 t carrier tape thickness 0.250.05 c cover tape width 5.30.1 HT9281/ht9282/ht9284 rev. 1.00 13 february 11, 2010
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HT9281/ht9282/ht9284 rev. 1.00 14 february 11, 2010 holtek semiconductor inc. (headquarters) no.3, creation rd. ii, science park, hsinchu, taiwan tel: 886-3-563-1999 fax: 886-3-563-1189 http://www.holtek.com.tw holtek semiconductor inc. (taipei sales office) 4f-2, no. 3-2, yuanqu st., nankang software park, taipei 115, taiwan tel: 886-2-2655-7070 fax: 886-2-2655-7373 fax: 886-2-2655-7383 (international sales hotline) holtek semiconductor inc. (shenzhen sales office) 5f, unit a, productivity building, no.5 gaoxin m 2nd road, nanshan district, shenzhen, china 518057 tel: 86-755-8616-9908, 86-755-8616-9308 fax: 86-755-8616-9722 holtek semiconductor (usa), inc. (north america sales office) 46729 fremont blvd., fremont, ca 94538 tel: 1-510-252-9880 fax: 1-510-252-9885 http://www.holtek.com copyright 2010 by holtek semiconductor inc. the information appearing in this data sheet is believed to be accurate at the time of publication. however, holtek as - sumes no responsibility arising from the use of the specifications described. the applications mentioned herein are used solely for the purpose of illustration and holtek makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. holtek s products are not authorized for use as critical components in life support devices or systems. holtek reserves the right to alter its products without prior notification. for the most up-to-date information, please visit our web site at http://www.holtek.com.tw.

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