OPA121

® OPA121 Low Cost Precision Difet ® OPERATIONAL AMPLIFIER FEATURES q LOW NOISE: 6nV/√Hz typ at 10kHz q LOW BIAS CURRENT: 5pA max q LOW OFFSET: 2mV max q LOW DRIFT: 3µV/°C typ q HIGH OPEN-LOOP GAIN: 110dB min q HIGH COMMON-MODE REJECTION: 86dB min APPLICATIONS q OPTOELECTRONICS q DATA ACQUISITION q TEST EQUIPMENT q MEDICAL EQUIPMENT q RADIATION HARD EQUIPMENT DESCRIPTION The OPA121 is a precision monolithic dielectricallyisolated FET (Difet ®) operational amplifier. Outstanding performance characteristics are now available for low-cost applications. Noise, bias current, voltage offset, drift, open-loop gain, common-mode rejection, and power supply rejection are superior to BIFET® amplifiers. Very low bias current is obtained by dielectric isolation with on-chip guarding. Laser-trimming of thin-film resistors gives very low offset and drift. Extremely low noise is achieved with new circuit design techniques (patented). A new cascode design allows high precision input specifications and reduced susceptibility to flicker noise. Standard 741 pin configuration allows upgrading of existing designs to higher performance levels. Case (TO-99) and Substrate 8 7 +VCC –In 2 3 +In Noise-Free Cascode* 6 Output Trim 10kΩ 1 5 Trim 10kΩ 2k Ω 2k Ω 2k Ω 2k Ω 4 *Patented OPA121 Simplified Circuit –VCC Difet ®, Burr-Brown Corp. BIFET®, National Semiconductor Corp. International Airport Industrial Park Mailing Address: PO Box 11400 Tel: (520) 746-1111 Twx: 910-952-1111 Cable: BBRC...