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OPA227, OPA2227, OPA4227 OPA228, OPA2228, OPA4228
SBOS110C – MAY 1998 – REVISED MARCH 2023
OPAx227, OPAx228 High-Precision, Low-Noise Operational Amplifiers
1 Features
• Low noise: 3 nV/√Hz • Wide bandwidth:
– OPA227: 8 MHz, 2.3 V/μs – OPA228: 33 MHz, 10 V/μs • Settling time: 5 μs • High CMRR: 138 dB • High open-loop gain: 160 dB • Low input bias current: 10 nA maximum • Low offset voltage: 75 µV maximum • Wide supply range: ±2.5 V to ±18 V • Single, dual, and quad versions
2 Applications
• Data acquisition (DAQ) • Condition monitoring sensor • Spectrum analyzer • Professional audio amplifier (rack mount) • Industrial AC-DC
100k
Input-Referred Voltage Noise (nV/√Hz) Input-Referred Current Noise (fA/√Hz)
10k
1k
Current Noise
100
10
Voltage Noise
1 0.
OPA227 Datasheet
