AD504MH

HighAccuracy IC Operational Amplifier N ANALOG W DEVICES' [ AD504 - I ADS04 FUNCTIONAL BLOCK DIAGRAM FEATURES OFFSET Low Vas: 500jN m8X (ADS04M) High G81": 10 min (AD604L, M, S) Low Drift: or,llvfc m8X (ADS04M) Free of Popcorn Noise NULL . OBS IN~~~NO ( z y- OLE PRODUCT DESCRIPTION 1'11eAnalog DevicesADS04J, K, L, M and S IC operational amplifiers provide ultra-low drift and extremely high gain, comparable to that of modular amplifien, for precision applications. A new double integrator circuit coru:ept combined with a precise therl1!ally balanced layout achieve$gain greater than 106, offset voltage drift of less than lIlV/C, small signal unity gain bandwidth of 300kHz, and slew rate of 0.12V/IlS. Because of monolithic construction, the cost of the ADS04 is significandy below that of modules, and becomes even lower with larger quantity requirements. The amplifier is externally compensated for unity gain with a single 47OpF capacitor.; no compensation is required for gains above 500. The inputs are fully protected, which permits differential input voltages of up to :!:Vswithout voltage gain or bias current degradation due to reverse breakdown. The output i~also protected from shon circuits to ground and/or: either supply voltage, 'and is capable of driving lOOOpFof load capacitance. The ADS04J, K, L andM are supplied in the hermetically ,sealedTO-99 package, and are specified for operation over the 0 to +70°C temperatUre range. The ADS04S is specified over the -55° C to +12SuC temperatUre range and is also supplied in the TD-99 ' package. To-99 TOP VIEW TE PRODUCT HIGHLIGHTS ° ' 1. Fully gu"ranteed and 100%tested lilV/ C maximum voltage drift combined with voltage offset of 500IlV (ADS04L). 2. Fully protected input (:!:Vs>and output circuitry. The input protection circuit prevents offset voltage and bias current degradation due to reverse breakdown, and is of critical importance in this type of device whoSe overall performance is strongly dependent upon front~nd stability. ! 3. Single capacitor compensation eliminates elaborate stabilizing networks while providing flexibility not possible with an internally compensated op amp. This feature allows bandwidth to be-optimized by the user for his panicular application. 4. High gain is maintained independent of offset nulling, power supply voltage and load resistance. S. Bootstrapping of the critical input transistor quad produces CMRR and PSRR compatible with the tight IIlVfc drift. CMRR and PSRR are both in the vicinity of 12OdB. 6. Noise performance is closely monitored at Outgoing QC to ensure compatibility with the low error budgets afforded by the performance of all other parameters. ,/ . 7. Eve7. ADS04 receives a stabilization bake for 24 hours at 150 C to ensure reliability and long term stability. 8. The'lOO piece price ofthe ADS04 is 1/3 to 1/2 lesSthan that of modular low drift operational amplifiers,and is . competitive with the price of less accurate IC op amps. , SPECIFICA JlONS (typical' PARAMETER OPEN LOOP GAIN Vas = :UOV, RL>2kO T mill