3626

3626 BURR-BROWN | Alldatasheet

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OZOL” , BURR-BROWN® 3626 Low Drift © LOW VOLTAGE DRIFT @ LOW GAIN 2uN/°C @ G = 5 (3626CP) ¢ LOW NOISE - 2.V, p-p © HIGH CMR - > 80dB @ G = 1000 * LOW COST © SMALL SIZE - DIP Package The 3626 iy an integrated circuit instrumentation The 3626 offers many benefits to the user for his amplifier designed for amplifying low level signals in instrumentation applications the presence of high common-mode voltages. ItS10W J ow voltage reduces temperature errors. drift, high input impedance ($x 10"R). easy Hain CGmonemode re . adjustment (SV V to 1000V V) and high common- High common-mode rejection preserves system mode rejection eliminate the problems and “°°Uracy compromises associated with using operational High input impedance prevents errors duc to amplifiers to realize the same gain function source loading and source impedance imbalance, Compared to other integrated circuit instrumenta- Small, dual-in-line package conserves board tion amplifiers it has the unique feature of having low Pace. voltage drift versus temperature at low gains. Laser-trimmed offset requires no nulling oo . sw fer SENSE a“ our 2-60

fare more expensive than monolithic 1C°s but they give FIGURE 2. Input Offset Drift vs Gain. better performance for the money. Instrumentation amplifiers normally require at least one jow gains. I resistor - the gain-setting resistor Ro. offset voltage drift, they must be matched to meet the the 3626 mace ite out ‘ y bee i. 6 office or our factory in Tucson to obtain a copy.

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FIGURE 1. Simplified Circuit Diagram. FIGURE 3. Output Offsetting and Power Boosting

‘Specifications typical at 25°C and +1SVOC uniess otherwise noted. rt 7 GAIN ° Gain Equation G=5 + 10K0/Ro: Li] Error from Equation!) 70.25 -0.0036.% < Owner Range of Gain, min 5 to 1000 Gain Temp. Coeticient mars 2ppmec « G=10 25ppmec = 100 35ppmec t L = 1000 S0ppmi°C ° ° . Nonlineaity, max i) 210.02 + 0.00036) | =10.01 + 000096) | +1001 + 000036: | snennannans i teas oy r Nii sre mot aes on soups Rated Output min +10V @ +5ma Output Impedance, G = 100 20 TwPUT Input impedance, Dit, & CM 5 x 100n99F Input Voltage Range, min siov [am [wax Twin Tw] CMR, DC to 60H with 1kf2 source unbalance [5 [ee [are [e0r[2057 | G=5. mn a9 7408 7438 [sso [si0 [sas [aes | = 10 10.1000, mn 7408 8008 2038 [efi aso [ess | eso] INPUT OFFSET VOLTAGE [c—Troowasie | aseaasic | inital Otte, max) 2104+ c4/Gimv | 02+ 02/Gmv | 102 + 02/G.\\mv vs. Temperature, max e168 + 10/GiinveC | #194576 avec | +1 + 8/6 avec Epes re es fa vs. Supply s0uvN [.—Tavesase [ver aate_] va Time sevieo. cn a CO ET INPUT BIAS CURRENTS Row Spacing: 76mm 10.300" Inival Bias Current, max 150nA either input Worght 34 grume 10.12 0 vs. Temperature, max s0TAAPC Connector 0145MC .14-pin DIP. vs. Supply 20.10 ‘Pin material and plating composition INPUT NOISE contorm to Method 2003 solderabiity Voltage, p-p, 0.01HE to 10He 2. pp ot MIL-STO-863, rms. 1OH2 to 1OkH2 Dav, me Current, p-p, 001H2 to 10H 150pA. p-p rims, 10h to 1OKHz 509A ems PIN CONNECTIONS DYNAMIC RESPONSE GAIN 12 GAIN Small Signal, £358 Flatness 2 NO INTERNAL 33 -N ors 00Khe 3 ICONNECTION — 18 vin 6-10 1eokti2 4. Vos G= 100 vane 5. Vos G = 1000 saute 6. Vee Smal Signa, 21% Flatness 7 REF Ors exits 8 SENSE G=10 aie 9 our = 100 Binns 10 +Vce G = 1000 2s0K2 11. NO INTERNAL CONNECTION Full Power. G = 5 10 100 w9Kie Siow Rate. G = 5 to 100 1 2v/uaee Settling Time 10.1%: *o CONNECTION DIAGRAM os see G=10 usec Veo G~ 100 100psec G = 1000. 12m ” Opso POWER SUPPLY @ SENSE Rated Voltage s1svoe i 4 Voltage Range +5V0C to =20v06 . Z Quiescent Supply Current 7m, max 1 © TEMPERATURE RANGE tr) our Specitications, min 25°C to +85°C oO SS Operation S5°C 10 1128°C BP Gace Storage “B5°C 10 150°C. iE NOTES = 100K" 1. May be trimmed to zero. 82 = a 2. Nonlinearity is the maximum peak deviation from the best straightline as a percent of full scale 4 Re = 200Ks" peak-to-peak output *oPTIONAL V “Yee OFFSET Trim 2-62

fypice © 258C and +15VOC power suopiesuness oxherwise 9oTes INPUT RANGE FOR, cua vs Source COMMON-MODE RESECTION no LINEAR RESPONSE IMPEGANCE UNGALANCE Isracauency | 100 ae soal.c - $00, 1000+] et ig = 100, 1000] |] Reis = 10 = | 3 fone eee 3 oe G = 1000 pep a | [ss 2 i Fa H = eof +++ — Ps 4" 100 Bal ue gee r Hi NP 8 3 Ta 28°C > of + t+} — aol Sour NEG. 10) Gl : ps 4 trepedence = 4 fp + | | fom 60ne Imbalance NX of + 20} <6 ° a es) t Sb as 208 ea se TOT TOF TO Suopty Voitaoe sours imeesnneunnsiance 12} Commanmade Input Freauency (Hs) [AMS INPUT NOISE VOLTAGE PEAK-TOPEAK INPUT NOISE SATURATED OUTPUT VOLTAGE AS PUT NOS Oe VoUTAce VS SOURCE RESISTANCE Vs oureuT CURRENT off —— | — 200 a Eso - Biol ty = HOME to tox 5 20 2 20 sg 10 He to r0nHe | Se /\\ 2 ones el facecae fe ne : Cot TT = to 00 FoR T0989 WS Tyas ae VOR oor 301520, source Resstance (2) source Resistance (1D urout Gurrent (mad FREQUENCY RESPONSE ver RESPONSE SUPPLY CURRENT 1000] ENG wf). 7 J-4 q VS. COMMON-MODE INPUT $ é sof tocnor ts [NS 3 st fin-xe A Bo i C | 3 V | c= r0008e | \\ } a a +10 2 ° | Lod 105 0s TOT TO o 30 720 204080 F easeney tHe) ime nee) oe ee 0 “common mode Voltage (Vb SETTING THE GAIN Figure 3 shows the normal operating connections for the impedances), the circuit in Figure 4 may be used. In this 4626, The differential gain, G. is determined according to circuit, Ry is added to intentionally imbalance the the equation: inverting and noninverting gains of the amplifier. Ro is Ges + Oke then used to rebalance them, which overcomes the effects Ro of any residual CMR degradation due to source impedance imbalance, ete. An improvement of where Ro is the resistor shown in Figure 4. This gain approximately 6 to 10dB can be typically realized at low equation is typically accurate to 0.25%. The temperature gains. coefficient of Re will directly affect the stability of G. For high gains, Ro will be quite small (Ry = 100 for G = Wee 1000): thus, the wiring impedance between pins I2.and | oN Ry=200 should be kept as low as possible. (Trimming of Re, will © pNO) Sliminate the effects of wiring impedances so long as this ©) @ ©) impedance is constant.) Also. note that Vi« source needs [re x ©) to be low impedance so as not to significantly affect the Vv WN C) C) Your gain equation © FO COMMON-MODE REJECTION TRIM Or; *, = 508 The 3626 meets its CMR specifications without Vv wey GV v additional trimming, however, for improved CMR in HIGURE 4, Commonmode Rejection Trim special situations (such as imbalanced source 2-63