OPA27

OPA27 OPA27 OPA27 OPA37 SBOS135C – JANUARY 1984 – REVISED AUGUST 2005 Ultra-Low Noise, Precision OPERATIONAL AMPLIFIERS FEATURES q LOW NOISE: 4.5nV/√Hz max at 1kHz q LOW OFFSET: 100µV max q LOW DRIFT: 0.4µV/°C q HIGH OPEN-LOOP GAIN: 117dB min q HIGH COMMON-MODE REJECTION: 100dB min q HIGH POWER-SUPPLY REJECTION: 94dB min q FITS OP-07, OP-05, AD510, AND AD517 SOCKETS APPLICATIONS q PRECISION INSTRUMENTATION q DATA ACQUISITION q TEST EQUIPMENT q PROFESSIONAL AUDIO EQUIPMENT q TRANSDUCER AMPLIFIERS q RADIATION HARD EQUIPMENT DESCRIPTION The OPA27 and OPA37 are ultra-low noise, high-precision monolithic operational amplifiers. Laser-trimmed thin-film resistors provide excellent long-term voltage offset stability and allow superior voltage offset compared to common zener-zap techniques. A unique bias current cancellation circuit allows bias and offset current specifications to be met over the full –40°C to +85°C temperature range. The OPA27 is internally compensated for unity-gain stability. The decompensated OPA37 requires a closed-loop gain ≥ 5. The Texas Instruments’ OPA27 and OPA37 are improved replacements for the industry-standard OP-27 and OP-37. 8 Trim 1 Trim 7 +VCC 2 –In 3 +In 6 Output 4 –VCC Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respectiv...