1.2v and 2.5v micropower voltage reference features l initial accuracy: ref1004-1.2 4mv ref1004-2.5 20mv l minimum operating current: ref1004-1.2 10 m a ref1004-2.5 20 m a l excellent long term temperature stability l very low dynamic impedance l operates up to 20ma l package: 8-lead soic international airport industrial park ? mailing address: po box 11400 ? tucson, az 85734 ? street address: 6730 s. tucson blvd. ? tucson, az 85706 tel: (520) 746-1111 ? twx: 910-952-1111 ? cable: bbrcorp ? telex: 066-6491 ? fax: (520) 889-1510 ? immediate product info: (800) 548-6132 ref1004 nc
nc
nc
anode cathode
nc
cathode
nc 1
2
3
4 8
7
6
5 typical operating circuit (top view) applications l battery powered test equipment l portable medical instrumentation l portable communications devices l a/d and d/a converters l notebook and palmtop computers description the ref1004-1.2 and ref1004-2.5 are two terminal bandgap reference diodes designed for high accuracy with outstanding temperature characteristics at low operating currents. prior to the introduction of the ref1004 micropower voltage references, accuracy and stability specifications could only be attained by expensive screening of standard devices. the ref1004 is a cost effective solution when reference voltage accuracy, low power, and long term temperature sta- bility are required. ref1004 is a drop-in replacement for the lt1004 as well as an upgraded replacement of the lm185/385 series references. the ref1004c is characterized for operation from 0 c to 70 c and the ref1004i is characterized for operation from C40 c to +85 c. the ref1004 is offered in an 8-lead plastic soic package and shipped in anti-static rails or tape and reel. ? 1992 burr-brown corporation pds-1172 printed in u.s.a. october, 1993 sbvs002
2 ref1004 ref1004-1.2 ref1004-2.5 parameter conditions min typ max min typ max units reference voltage i r = 100 m a 1.231 1.235 1.239 2.490 2.500 2.511 v ref1004c (1) 1.229 1.235 1.239 2.487 2.500 2.511 ref1004i (2) 1.225 1.235 1.239 2.480 2.500 2.511 average temperature coefficient i min i r 20ma 20 20 ppm/ c minimum operation current (3) 810 1220 m a reverse breakdown i min i r 1ma 1 1 mv voltage change with 1.5 (3) 1.5 (3) current 1ma i r 20ma 10 10 20 (3) 20 (3) reverse dynamic impedance (3) i r = 100 m a 0.2 0.6 0.2 0.6 w wide band noise (rms) i r = 100 m a 10hz i r 10khz 60 120 m v long term stability i r = 100 m a t a = 25 c 0.1 c 20 20 ppm/khr notes: (1) this specification applies over the full operating temperature range of 0 c t a 70 c. (2) this specification applies over the full operating temperature range of 40 c t a +85 c. (3) denotes the specifications which apply over the full operating temperature range. specifications electrical t a = +25 c unless otherwise noted. model t a v z package ref1004c-1.2 0 c to +70 c 1.2v 8-lead soic ref1004c-2.5 0 c to +70 c 2.5v 8-lead soic ref1004i-1.2 C40 c to +85 c 1.2v 8-lead soic ref1004i-2.5 C40 c to +85 c 2.5v 8-lead soic note: available in tape and reel, add Ctr to model number. ordering information reverse breakdown current ........................................................... 30ma forward current ................................................................................ 10ma operating temperature range ref1004c ........................................................................ 0 c to +70 c ref1004i ...................................................................... C40 c to +85 c storage temperature ref1004c .................................................................. C65 c to +150 c ref1004i .................................................................... C65 c to +150 c lead temperature (soldering, 10s) ............................................... +300 c absolute maximum ratings model part marking ref1004c-1.2 bbref0412 ref1004c-2.5 bbref0425 ref1004i-1.2 bbref0412 ref1004i-2.5 bbref0425 ordering information package information package drawing model package number (1) ref1004c-1.2 8-pin soic 182 ref1004c-2.5 8-pin soic 182 ref1004i-1.2 8-pin soic 182 ref1004i-2.5 8-pin soic 182 note: (1) for detailed drawing and dimension table, please see end of data sheet, or appendix d of burr-brown ic data book. the information provided herein is believed to be reliable; however, burr-brown assumes no responsibility for inaccuracies or omissions. burr-brown assumes no responsibility for the use of this information, and all use of such information shall be entirely at the users own risk. prices and specifications are subject to change without notice. no patent rights or licenses to any of the circuits described herein are implied or granted to any third party. burr-brown does not authorize or warrant any burr-brown product for use in life support devices and/or systems.
3 ref1004 typical performance curves 1.2v t a = +25 c unless otherwise noted. reverse characteristics reverse voltage (v) 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 reverse current (?) 100
10
1
0.1 ?0? t a +85? temperature (?) ?5 ?5 ?5 5 25 45 65 85 105 125 1.245
1.240
1.235
1.230
1.225 reverse voltage (v) temperature drift reverse dynamic impedance reverse current (ma) 0.01 0.1 1 10 100 100
10
1
0.1 reverse impedance ( w ) f = 25hz
?0? to +85? forward characteristics 1.2
0.8
0.4
0.0 forward voltage (v) forward current (ma) 0.01 0.1 1 10 100 t a = 25? 16
12
8
4
0
? output voltage change (mv) reverse voltage change reverse current (ma) 1 0.01 0.1 10 100 ?0? t a +85? reverse dynamic impedance frequency (hz) 10 100 1k 10k 100k 1m 10k
1k
100
10
1
0.1 dynamic impedance ( w ) t a = +25?
i ref = 100?
4 ref1004 typical performance curves 1.2v (cont) t a = +25 c unless otherwise noted. frequency (hz) 1k 10k 100k 100 10 700
600
500
400
300
200
100
0 noise (nv/ ? hz) noise voltage i ref = 100?
t a = 25? filtered output noise 100 1k 10k 100k cutoff frequency (hz) integrated noise (?) 70
60
50
40
30
20
10
0 i ref = 100? 100? r c response time time (?ec) 0 100 200 300 400 500 600
1.5
1.0
0.5
0.0
5
2.5
0 voltage (v) 36k w v in v out output input
5 ref1004 reverse characteristics reverse current (?) 100
10
1
0.1 reverse voltage (v) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 ?0? t a +85? typical performance curves 2.5v t a = +25 c unless otherwise noted. forward characteristics 1.2
1.0
0.8
0.6
0.4
0.2
0.0 forward voltage (v) forward current (ma) 0.01 0.1 1 10 100 t a = +25? reverse voltage change reverse current (ma) output voltage change (mv) 6
5
4
3
2
1
0
?
? 0.01 0.1 1 10 100 ?0? t a +85? temperature (?) ?5 ?5 ?5 5 25 45 65 85 105 125 2.520
2.515
2.510
2.505
2.500
2.495
2.490
2.485
2.480
2.475 reference voltage (v) temperature drift reverse dynamic impedance 1000
100
10
1
0.1 reverse impedance ( w ) reverse current (ma) 0.01 0.1 1 10 100 f = 25hz
?0? to +85? reverse dynamic impedance frequency (hz) 10 100 1k 10k 100k 1m 10k
1k
100
10
1
0.1 dynamic impedance ( w ) t a = +25?
i ref = 100?
6 ref1004 typical performance curves 2.5v (cont) t a = +25 c unless otherwise noted. noise (nv/ ? hz) frequency (hz) 1k 10k 100k 100 10 1400
1200
1000
800
600
400
200
0 noise voltage i ref = 100? filtered output noise 100 cutoff frequency (hz) 1k 10k 100k integrated noise (?) 120
100
80
60
40
20
0 100? r c i ref = 100? response time voltage (v) time (?ec) 4.0
3.0
2.0
1.0
0.0
5.0
0.0 0 100 200 300 400 500 600 24k w v in v out output input
7 ref1004 figure 1. low-noise reference. figure2. micropower reference from 9v battery. 1.5v (see note) ref1004-1.2 3k w 1.235v note: output regulates
to 1.285v for i o = 0. figure 3. 1.2v reference from 1.5v battery. figure 4. 2.5v reference. + 100? v i 3 5v 22 w ref1004-1.2 output 5? 9v ref1004-1.2 510k w 1.235v 5v ref1004-2.5 50k w 2.5v figure 5. lead-acid low-battery-voltage detector. tlc271 lo = battery low 12v battery output 1m w r 1 (1)
1% 133k w
1% ref1004-1.2 note: (1) r 1 sets trip point, 60.4k w per cell for 1.8v per cell.
packaging information orderable device status (1) package type package drawing pins package qty eco plan (2) lead/ball finish msl peak temp (3) ref1004c-1.2 active soic d 8 100 none cu snpb level-3-220c-168 hr ref1004c-1.2/2k5 active soic d 8 2500 none cu snpb level-3-220c-168 hr ref1004c-2.5 active soic d 8 100 none cu snpb level-3-220c-168 hr ref1004c-2.5/2k5 active soic d 8 2500 none cu snpb level-3-220c-168 hr ref1004i-1.2 active soic d 8 100 none cu snpb level-3-220c-168 hr ref1004i-1.2/2k5 active soic d 8 2500 none cu snpb level-3-220c-168 hr ref1004i-2.5 active soic d 8 100 none cu snpb level-3-220c-168 hr ref1004i-2.5/2k5 active soic d 8 2500 none cu snpb level-3-220c-168 hr (1) the marketing status values are defined as follows: active: product device recommended for new designs. lifebuy: ti has announced that the device will be discontinued, and a lifetime-buy period is in effect. nrnd: not recommended for new designs. device is in production to support existing customers, but ti does not recommend using this part in a new design. preview: device has been announced but is not in production. samples may or may not be available. obsolete: ti has discontinued the production of the device. (2) eco plan - may not be currently available - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. none: not yet available lead (pb-free). pb-free (rohs): ti's terms "lead-free" or "pb-free" mean semiconductor products that are compatible with the current rohs requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. where designed to be soldered at high temperatures, ti pb-free products are suitable for use in specified lead-free processes. green (rohs & no sb/br): ti defines "green" to mean "pb-free" and in addition, uses package materials that do not contain halogens, including bromine (br) or antimony (sb) above 0.1% of total product weight. (3) msl, peak temp. -- the moisture sensitivity level rating according to the jedecindustry standard classifications, and peak solder temperature. important information and disclaimer: the information provided on this page represents ti's knowledge and belief as of the date that it is provided. ti bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. efforts are underway to better integrate information from third parties. ti has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ti and ti suppliers consider certain information to be proprietary, and thus cas numbers and other limited information may not be available for release. in no event shall ti's liability arising out of such information exceed the total purchase price of the ti part(s) at issue in this document sold by ti to customer on an annual basis. package option addendum www.ti.com 18-feb-2005 addendum-page 1
important notice texas instruments incorporated and its subsidiaries (ti) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. all products are sold subject to ti?s terms and conditions of sale supplied at the time of order acknowledgment. ti warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with ti?s standard warranty. testing and other quality control techniques are used to the extent ti deems necessary to support this warranty. except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. ti assumes no liability for applications assistance or customer product design. customers are responsible for their products and applications using ti components. to minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. ti does not warrant or represent that any license, either express or implied, is granted under any ti patent right, copyright, mask work right, or other ti intellectual property right relating to any combination, machine, or process in which ti products or services are used. information published by ti regarding third-party products or services does not constitute a license from ti to use such products or services or a warranty or endorsement thereof. use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from ti under the patents or other intellectual property of ti. reproduction of information in ti data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. reproduction of this information with alteration is an unfair and deceptive business practice. ti is not responsible or liable for such altered documentation. resale of ti products or services with statements different from or beyond the parameters stated by ti for that product or service voids all express and any implied warranties for the associated ti product or service and is an unfair and deceptive business practice. ti is not responsible or liable for any such statements. following are urls where you can obtain information on other texas instruments products and application solutions: products applications amplifiers amplifier.ti.com audio www.ti.com/audio data converters dataconverter.ti.com automotive www.ti.com/automotive dsp dsp.ti.com broadband www.ti.com/broadband interface interface.ti.com digital control www.ti.com/digitalcontrol logic logic.ti.com military www.ti.com/military power mgmt power.ti.com optical networking www.ti.com/opticalnetwork microcontrollers microcontroller.ti.com security www.ti.com/security telephony www.ti.com/telephony video & imaging www.ti.com/video wireless www.ti.com/wireless mailing address: texas instruments post office box 655303 dallas, texas 75265 copyright ? 2005, texas instruments incorporated
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